New nng version of Getting Started. While here we fixed a few problems with the old version (mostly compile lines that were botched.)
diff --git a/_adoc/gettingstarted/banner.adoc b/_adoc/gettingstarted/banner.adoc index 6e612f4..2907e11 100644 --- a/_adoc/gettingstarted/banner.adoc +++ b/_adoc/gettingstarted/banner.adoc
@@ -4,3 +4,6 @@ That post is no longer available, but we have modified and restructured it, as well as making enhancments and corrections. Tim's original code is on https://github.com/dysinger/nanomsg-examples[github], but we recommend using the examples here as they have a number of corrections. + +TIP: If you want to use the experimental https://github.com/nanomsg/nng[nng] +library instead, see the document <<nng/index#,Getting Started with 'nng'>>.
diff --git a/_adoc/gettingstarted/bus.adoc b/_adoc/gettingstarted/bus.adoc index 0ab43d8..123a398 100644 --- a/_adoc/gettingstarted/bus.adoc +++ b/_adoc/gettingstarted/bus.adoc
@@ -24,7 +24,7 @@ .Compilation [source,bash] ---- -gcc bus.c -lnanomsg.a -o bus +gcc bus.c -lnanomsg -o bus ---- .Execution
diff --git a/_adoc/gettingstarted/nng/banner.adoc b/_adoc/gettingstarted/nng/banner.adoc new file mode 100644 index 0000000..22d1a7c --- /dev/null +++ b/_adoc/gettingstarted/nng/banner.adoc
@@ -0,0 +1,6 @@ += <<index#,Getting Started with 'nng'>> + +NOTE: This document is derived from an original post by Tim Dysinger. +However, the examples here are for https://github.com/nanomsg/nng[nng] +instead of https://github.com/nanomsg/nanomsg[nanomsg]. For the legacy +nanomsg version of this, see <<../index#,Getting Started with 'nanomsg'>>.
diff --git a/_adoc/gettingstarted/nng/bus.adoc b/_adoc/gettingstarted/nng/bus.adoc new file mode 100644 index 0000000..cdfc19f --- /dev/null +++ b/_adoc/gettingstarted/nng/bus.adoc
@@ -0,0 +1,39 @@ +--- +layout: default +--- +:source-highlighter: coderay +:icons: font + +include::banner.adoc[] + +== Bus (Routing) + +image::../bus.png[A Simple Bus] + +The bus protocol is useful for routing applications, or for building +fully interconnected mesh networks. In this pattern, messages are +sent to every directly connected peer. + +.bus.c +[source,c] +---- +include::src/bus.c[] +---- +<1> Blithely assumes message is ASCIIZ string. Real code should check it. + +.Compilation +[source,bash] +---- +gcc bus.c -lnng -o bus +---- + +.Execution +[source,bash] +---- +include::src/bus.sh[] +---- + +.Output +---- +include::src/bus.out[] +----
diff --git a/_adoc/gettingstarted/nng/index.adoc b/_adoc/gettingstarted/nng/index.adoc new file mode 100644 index 0000000..9a409ad --- /dev/null +++ b/_adoc/gettingstarted/nng/index.adoc
@@ -0,0 +1,22 @@ +--- +layout: default +--- +:source-highlighter: coderay +:icons: font + +include::banner.adoc[] + +== Messaging Patterns + +http://nanomsg.github.io/nng[nng] is a messaging framework that attempts to +help solve common messaging problems with one of a few patterns ('protocols' +in nng parlance.) + +Following are examples of each pattern type in C. + +* <<pipeline#,Pipeline (A One-Way Pipe)>> +* <<reqrep#,Request/Reply (I ask, you answer)>> +* <<pair#,Pair (Two Way Radio)>> +* <<pubsub#,Pub/Sub (Topics & Broadcast)>> +* <<survey#,Survey (Everybody Votes)>> +* <<bus#,Bus (Routing)>>
diff --git a/_adoc/gettingstarted/nng/pair.adoc b/_adoc/gettingstarted/nng/pair.adoc new file mode 100644 index 0000000..844780a --- /dev/null +++ b/_adoc/gettingstarted/nng/pair.adoc
@@ -0,0 +1,39 @@ +--- +layout: default +--- +:source-highlighter: coderay +:icons: font + +include::banner.adoc[] + +== Pair (Two Way Radio) + +image::../pair.png[Two Way Radio] + +The pair pattern is used when there a one-to-one peer relationship. +Only one peer may be connected to another peer at a time, but both +may speak freely. + +.pair.c +[source,c] +---- +include::src/pair.c[] +---- +<1> Blithely assumes message is ASCIIZ string. Real code should check it. + +.Compilation +[source,bash] +---- +gcc pair.c -lnng -o pair +---- + +.Execution +[source,bash] +---- +include::src/pair.sh[] +---- + +.Output +---- +include::src/pair.out[] +----
diff --git a/_adoc/gettingstarted/nng/pipeline.adoc b/_adoc/gettingstarted/nng/pipeline.adoc new file mode 100644 index 0000000..8b28272 --- /dev/null +++ b/_adoc/gettingstarted/nng/pipeline.adoc
@@ -0,0 +1,39 @@ +--- +layout: default +--- +:source-highlighter: coderay +:icons: font + +include::banner.adoc[] + +== Pipeline (A One-Way Pipe) + +image::../pipeline.png[A One-Way Pipe] + +This pattern is useful for solving producer/consumer problems, including +load-balancing. Messages flow from the push side to the pull side. If +multiple peers are connected, the pattern attempts to distribute fairly. + +.pipeline.c +[source,C] +---- +include::src/pipeline.c[] +---- +<1> Blithely assumes message is ASCIIZ string. Real code should check it. + +.Compilation +[source,bash] +---- +gcc pipeline.c -lnng -o pipeline +---- + +.Execution +[source,bash] +---- +include::src/pipeline.sh[] +---- + +.Output +---- +include::src/pipeline.out[] +----
diff --git a/_adoc/gettingstarted/nng/pubsub.adoc b/_adoc/gettingstarted/nng/pubsub.adoc new file mode 100644 index 0000000..4532707 --- /dev/null +++ b/_adoc/gettingstarted/nng/pubsub.adoc
@@ -0,0 +1,38 @@ +--- +layout: default +--- +:source-highlighter: coderay +:icons: font + +include::banner.adoc[] + +== Pub/Sub (Topics & Broadcast) + +image::../pubsub.png[Topics & Broadcast] + +This pattern is used to allow a single broadcaster to publish messages +to many subscribers, which may choose to limit which messages they receive. + +.pubsub.c +[source,c] +---- +include::src/pubsub.c[] +---- +<1> Blithely assumes message is ASCIIZ string. Real code should check it. + +.Compilation +[source,bash] +---- +gcc pubsub.c -lnng -o pubsub +---- + +.Execution +[source,bash] +---- +include::src/pubsub.sh[] +---- + +.Output +---- +include::src/pubsub.out[] +----
diff --git a/_adoc/gettingstarted/nng/reqrep.adoc b/_adoc/gettingstarted/nng/reqrep.adoc new file mode 100644 index 0000000..ec6ea65 --- /dev/null +++ b/_adoc/gettingstarted/nng/reqrep.adoc
@@ -0,0 +1,41 @@ +--- +layout: default +--- +:source-highlighter: coderay +:icons: font + +include::banner.adoc[] + +== Request/Reply (I ask, you answer) + +image::../reqrep.png[I ask, you answer] + +Request/Reply is used for synchronous communications where each question +is responded with a single answer, for example remote procedure calls (RPCs). +Like <<pipeline#,Pipeline>>, it also can perform load-balancing. This +is the only reliable messaging pattern in the suite, as it automatically +will retry if a request is not matched with a response. + +.reqprep.c +[source,c] +---- +include::src/reqrep.c[] +---- +<1> Blithely assumes message is ASCIIZ string. Real code should check it. + +.Compilation +[source,bash] +---- +gcc reqrep.c -lnng -o reqrep +---- + +.Execution +[source,bash] +---- +include::src/reqrep.sh[] +---- + +.Output +---- +include::src/reqrep.out[] +----
diff --git a/_adoc/gettingstarted/nng/src/bus.c b/_adoc/gettingstarted/nng/src/bus.c new file mode 100644 index 0000000..97cd84d --- /dev/null +++ b/_adoc/gettingstarted/nng/src/bus.c
@@ -0,0 +1,72 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <nng/nng.h> +#include <nng/protocol/bus0/bus.h> + +void +fatal(const char *func, int rv) +{ + fprintf(stderr, "%s: %s\n", func, nng_strerror(rv)); + exit(1); +} + +int +node(int argc, char **argv) +{ + nng_socket sock; + int rv; + size_t sz; + + if ((rv = nng_bus0_open(&sock)) != 0) { + fatal("nng_bus0_open", rv); + } + if ((rv = nng_listen(sock, argv[2], NULL, 0)) != 0) { + fatal("nng_listen", rv); + } + + sleep(1); // wait for peers to bind + if (argc >= 3) { + for (int x = 3; x < argc; x++) { + if ((rv = nng_dial(sock, argv[x], NULL, 0)) != 0) { + fatal("nng_dial", rv); + } + } + } + + sleep(1); // wait for connects to establish + + // SEND + sz = strlen(argv[1]) + 1; // '\0' too + printf("%s: SENDING '%s' ONTO BUS\n", argv[1], argv[1]); + if ((rv = nng_send(sock, argv[1], sz, 0)) != 0) { + fatal("nng_send", rv); + } + + // RECV + for (;;) { + char *buf = NULL; + size_t sz; + if ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) !=0) { + if (rv == NNG_ETIMEDOUT) { + fatal("nng_recv", rv); + } + } + printf("%s: RECEIVED '%s' FROM BUS\n", argv[1], buf); // <1> + nng_free(buf, sz); + } + nng_close(sock); + return (0); +} + +int +main(int argc, char **argv) +{ + if (argc >= 3) { + return (node(argc, argv)); + } + fprintf(stderr, "Usage: bus <NODE_NAME> <URL> <URL> ...\n"); + return 1; +}
diff --git a/_adoc/gettingstarted/nng/src/bus.out b/_adoc/gettingstarted/nng/src/bus.out new file mode 100644 index 0000000..690004c --- /dev/null +++ b/_adoc/gettingstarted/nng/src/bus.out
@@ -0,0 +1,16 @@ +node3: SENDING 'node3' ONTO BUS +node0: SENDING 'node0' ONTO BUS +node1: SENDING 'node1' ONTO BUS +node2: SENDING 'node2' ONTO BUS +node0: RECEIVED 'node1' FROM BUS +node1: RECEIVED 'node0' FROM BUS +node2: RECEIVED 'node0' FROM BUS +node3: RECEIVED 'node1' FROM BUS +node0: RECEIVED 'node2' FROM BUS +node1: RECEIVED 'node2' FROM BUS +node3: RECEIVED 'node2' FROM BUS +node0: RECEIVED 'node3' FROM BUS +node2: RECEIVED 'node3' FROM BUS +node1: RECEIVED 'node3' FROM BUS +node3: RECEIVED 'node0' FROM BUS +node2: RECEIVED 'node1' FROM BUS
diff --git a/_adoc/gettingstarted/nng/src/bus.sh b/_adoc/gettingstarted/nng/src/bus.sh new file mode 100644 index 0000000..6a52379 --- /dev/null +++ b/_adoc/gettingstarted/nng/src/bus.sh
@@ -0,0 +1,6 @@ +./bus node0 ipc:///tmp/node0.ipc ipc:///tmp/node1.ipc ipc:///tmp/node2.ipc & node0=$! +./bus node1 ipc:///tmp/node1.ipc ipc:///tmp/node2.ipc ipc:///tmp/node3.ipc & node1=$! +./bus node2 ipc:///tmp/node2.ipc ipc:///tmp/node3.ipc & node2=$! +./bus node3 ipc:///tmp/node3.ipc ipc:///tmp/node0.ipc & node3=$! +sleep 5 +kill $node0 $node1 $node2 $node3
diff --git a/_adoc/gettingstarted/nng/src/pair.c b/_adoc/gettingstarted/nng/src/pair.c new file mode 100644 index 0000000..bb9e78c --- /dev/null +++ b/_adoc/gettingstarted/nng/src/pair.c
@@ -0,0 +1,97 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <nng/nng.h> +#include <nng/protocol/pair0/pair.h> + +#define NODE0 "node0" +#define NODE1 "node1" + +void +fatal(const char *func, int rv) +{ + fprintf(stderr, "%s: %s\n", func, nng_strerror(rv)); + exit(1); +} + +int +send_name(nng_socket sock, char *name) +{ + int rv; + printf("%s: SENDING \"%s\"\n", name, name); + if ((rv = nng_send(sock, name, strlen(name) + 1, 0)) != 0) { + fatal("nng_send", rv); + } + return (rv); +} + +int +recv_name(nng_socket sock, char *name) +{ + char *buf = NULL; + int rv; + size_t sz; + if ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) == 0) { + printf("%s: RECEIVED \"%s\"\n", name, buf); // <1> + nng_free(buf, sz); + } + return (rv); +} + +int +send_recv(nng_socket sock, char *name) +{ + int rv; + if ((rv = nng_setopt_ms(sock, NNG_OPT_RECVTIMEO, 100)) != 0) { + fatal("nng_setopt_ms", rv); + } + for (;;) { + recv_name(sock, name); + sleep(1); + send_name(sock, name); + } +} + +int +node0(const char *url) +{ + nng_socket sock; + int rv; + if ((rv = nng_pair0_open(&sock)) != 0) { + fatal("nng_pair0_open", rv); + } + if ((rv = nng_listen(sock, url, NULL, 0)) !=0) { + fatal("nng_listen", rv); + } + return (send_recv(sock, NODE0)); +} + +int +node1(const char *url) +{ + nng_socket sock; + int rv; + sleep(1); + if ((rv = nng_pair0_open(&sock)) != 0) { + fatal("nng_pair0_open", rv); + } + if ((rv = nng_dial(sock, url, NULL, 0)) != 0) { + fatal("nng_dial", rv); + } + return (send_recv(sock, NODE1)); +} + +int +main(int argc, char **argv) +{ + if ((argc > 1) && (strcmp(NODE0, argv[1]) == 0)) + return (node0(argv[2])); + + if ((argc > 1) && (strcmp(NODE1, argv[1]) == 0)) + return (node1(argv[2])); + + fprintf(stderr, "Usage: pair %s|%s <URL> <ARG> ...\n", NODE0, NODE1); + return 1; +}
diff --git a/_adoc/gettingstarted/nng/src/pair.out b/_adoc/gettingstarted/nng/src/pair.out new file mode 100644 index 0000000..0bdb0de --- /dev/null +++ b/_adoc/gettingstarted/nng/src/pair.out
@@ -0,0 +1,6 @@ +node0: SENDING "node0" +node1: RECEIVED "node0" +node1: SENDING "node1" +node0: SENDING "node0" +node0: RECEIVED "node1" +node1: RECEIVED "node0"
diff --git a/_adoc/gettingstarted/nng/src/pair.sh b/_adoc/gettingstarted/nng/src/pair.sh new file mode 100644 index 0000000..e6bec20 --- /dev/null +++ b/_adoc/gettingstarted/nng/src/pair.sh
@@ -0,0 +1,5 @@ +./pair node0 ipc:///tmp/pair.ipc & node0=$! +./pair node1 ipc:///tmp/pair.ipc & node1=$! +sleep 3 +kill $node0 $node1 +
diff --git a/_adoc/gettingstarted/nng/src/pipeline.c b/_adoc/gettingstarted/nng/src/pipeline.c new file mode 100644 index 0000000..f2a48f2 --- /dev/null +++ b/_adoc/gettingstarted/nng/src/pipeline.c
@@ -0,0 +1,78 @@ +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#include <nng/nng.h> +#include <nng/protocol/pipeline0/pull.h> +#include <nng/protocol/pipeline0/push.h> + +#define NODE0 "node0" +#define NODE1 "node1" + +void +fatal(const char *func, int rv) +{ + fprintf(stderr, "%s: %s\n", func, nng_strerror(rv)); + exit(1); +} + +int +node0(const char *url) +{ + nng_socket sock; + int rv; + + if ((rv = nng_pull0_open(&sock)) != 0) { + fatal("nng_pull0_open", rv); + } + if ((rv = nng_listen(sock, url, NULL, 0)) != 0) { + fatal("nng_listen", rv); + } + for (;;) { + char *buf = NULL; + size_t sz; + if ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) != 0) { + fatal("nng_recv", rv); + } + printf("NODE0: RECEIVED \"%s\"\n", buf); // <1> + nng_free(buf, sz); + } +} + +int +node1(const char *url, char *msg) +{ + int sz_msg = strlen(msg) + 1; // '\0' too + nng_socket sock; + int rv; + int bytes; + + if ((rv = nng_push0_open(&sock)) != 0) { + fatal("nng_push0_open", rv); + } + if ((rv = nng_dial(sock, url, NULL, 0)) != 0) { + fatal("nng_dial", rv); + } + printf("NODE1: SENDING \"%s\"\n", msg); + if ((rv = nng_send(sock, msg, strlen(msg)+1, 0)) != 0) { + fatal("nng_send", rv); + } + sleep(1); // wait for messages to flush before shutting down + nng_close(sock); + return (0); +} + +int +main(int argc, char **argv) +{ + if ((argc > 1) && (strcmp(NODE0, argv[1]) == 0)) + return (node0(argv[2])); + + if ((argc > 2) && (strcmp(NODE1, argv[1]) == 0)) + return (node1(argv[2], argv[3])); + + fprintf(stderr, "Usage: pipeline %s|%s <URL> <ARG> ...'\n", + NODE0, NODE1); + return (1); +}
diff --git a/_adoc/gettingstarted/nng/src/pipeline.out b/_adoc/gettingstarted/nng/src/pipeline.out new file mode 100644 index 0000000..0427e67 --- /dev/null +++ b/_adoc/gettingstarted/nng/src/pipeline.out
@@ -0,0 +1,4 @@ +NODE1: SENDING "Hello, World!" +NODE0: RECEIVED "Hello, World!" +NODE1: SENDING "Goodbye." +NODE0: RECEIVED "Goodbye."
diff --git a/_adoc/gettingstarted/nng/src/pipeline.sh b/_adoc/gettingstarted/nng/src/pipeline.sh new file mode 100644 index 0000000..39b7815 --- /dev/null +++ b/_adoc/gettingstarted/nng/src/pipeline.sh
@@ -0,0 +1,5 @@ +./pipeline node0 ipc:///tmp/pipeline.ipc & node0=$! && sleep 1 +./pipeline node1 ipc:///tmp/pipeline.ipc "Hello, World!" +./pipeline node1 ipc:///tmp/pipeline.ipc "Goodbye." +kill $node0 +
diff --git a/_adoc/gettingstarted/nng/src/pubsub.c b/_adoc/gettingstarted/nng/src/pubsub.c new file mode 100644 index 0000000..012d1f5 --- /dev/null +++ b/_adoc/gettingstarted/nng/src/pubsub.c
@@ -0,0 +1,92 @@ +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <time.h> +#include <unistd.h> + +#include <nng/nng.h> +#include <nng/protocol/pubsub0/pub.h> +#include <nng/protocol/pubsub0/sub.h> + +#define SERVER "server" +#define CLIENT "client" + +void +fatal(const char *func, int rv) +{ + fprintf(stderr, "%s: %s\n", func, nng_strerror(rv)); +} + +char * +date(void) +{ + time_t now = time(&now); + struct tm *info = localtime(&now); + char *text = asctime(info); + text[strlen(text)-1] = '\0'; // remove '\n' + return (text); +} + +int +server(const char *url) +{ + nng_socket sock; + int rv; + + if ((rv = nng_pub0_open(&sock)) != 0) { + fatal("nng_pub0_open", rv); + } + if ((rv = nng_listen(sock, url, NULL, 0)) < 0) { + fatal("nng_listen", rv); + } + for (;;) { + char *d = date(); + printf("SERVER: PUBLISHING DATE %s\n", d); + if ((rv = nng_send(sock, d, strlen(d) + 1, 0)) != 0) { + fatal("nng_send", rv); + } + sleep(1); + } +} + +int +client(const char *url, const char *name) +{ + nng_socket sock; + int rv; + + if ((rv = nng_sub0_open(&sock)) != 0) { + fatal("nng_sub0_open", rv); + } + + // subscribe to everything (empty means all topics) + if ((rv = nng_setopt(sock, NNG_OPT_SUB_SUBSCRIBE, "", 0)) != 0) { + fatal("nng_setopt", rv); + } + if ((rv = nng_dial(sock, url, NULL, 0)) != 0) { + fatal("nng_dial", rv); + } + for (;;) { + char *buf = NULL; + size_t sz; + if ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) != 0) { + fatal("nng_recv", rv); + } + printf("CLIENT (%s): RECEIVED %s\n", name, buf); // <1> + nng_free(buf, sz); + } +} + +int +main(const int argc, const char **argv) +{ + if ((argc >= 2) && (strcmp(SERVER, argv[1]) == 0)) + return (server(argv[2])); + + if ((argc >= 3) && (strcmp(CLIENT, argv[1]) == 0)) + return (client (argv[2], argv[3])); + + fprintf(stderr, "Usage: pubsub %s|%s <URL> <ARG> ...\n", + SERVER, CLIENT); + return 1; +}
diff --git a/_adoc/gettingstarted/nng/src/pubsub.out b/_adoc/gettingstarted/nng/src/pubsub.out new file mode 100644 index 0000000..4caf5f9 --- /dev/null +++ b/_adoc/gettingstarted/nng/src/pubsub.out
@@ -0,0 +1,21 @@ +SERVER: PUBLISHING DATE Tue Jan 9 08:21:31 2018 +SERVER: PUBLISHING DATE Tue Jan 9 08:21:32 2018 +CLIENT (client2): RECEIVED Tue Jan 9 08:21:32 2018 +CLIENT (client1): RECEIVED Tue Jan 9 08:21:32 2018 +CLIENT (client0): RECEIVED Tue Jan 9 08:21:32 2018 +SERVER: PUBLISHING DATE Tue Jan 9 08:21:33 2018 +CLIENT (client0): RECEIVED Tue Jan 9 08:21:33 2018 +CLIENT (client2): RECEIVED Tue Jan 9 08:21:33 2018 +CLIENT (client1): RECEIVED Tue Jan 9 08:21:33 2018 +SERVER: PUBLISHING DATE Tue Jan 9 08:21:34 2018 +CLIENT (client2): RECEIVED Tue Jan 9 08:21:34 2018 +CLIENT (client0): RECEIVED Tue Jan 9 08:21:34 2018 +CLIENT (client1): RECEIVED Tue Jan 9 08:21:34 2018 +SERVER: PUBLISHING DATE Tue Jan 9 08:21:35 2018 +CLIENT (client0): RECEIVED Tue Jan 9 08:21:35 2018 +CLIENT (client1): RECEIVED Tue Jan 9 08:21:35 2018 +CLIENT (client2): RECEIVED Tue Jan 9 08:21:35 2018 +SERVER: PUBLISHING DATE Tue Jan 9 08:21:36 2018 +CLIENT (client0): RECEIVED Tue Jan 9 08:21:36 2018 +CLIENT (client1): RECEIVED Tue Jan 9 08:21:36 2018 +CLIENT (client2): RECEIVED Tue Jan 9 08:21:36 2018
diff --git a/_adoc/gettingstarted/nng/src/pubsub.sh b/_adoc/gettingstarted/nng/src/pubsub.sh new file mode 100644 index 0000000..c3f1c59 --- /dev/null +++ b/_adoc/gettingstarted/nng/src/pubsub.sh
@@ -0,0 +1,6 @@ +./pubsub server ipc:///tmp/pubsub.ipc & server=$! && sleep 1 +./pubsub client ipc:///tmp/pubsub.ipc client0 & client0=$! +./pubsub client ipc:///tmp/pubsub.ipc client1 & client1=$! +./pubsub client ipc:///tmp/pubsub.ipc client2 & client2=$! +sleep 5 +kill $server $client0 $client1 $client2
diff --git a/_adoc/gettingstarted/nng/src/reqrep.c b/_adoc/gettingstarted/nng/src/reqrep.c new file mode 100644 index 0000000..4ef0448 --- /dev/null +++ b/_adoc/gettingstarted/nng/src/reqrep.c
@@ -0,0 +1,99 @@ +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <time.h> + +#include <nng/nng.h> +#include <nng/protocol/reqrep0/rep.h> +#include <nng/protocol/reqrep0/req.h> + +#define NODE0 "node0" +#define NODE1 "node1" +#define DATE "DATE" + +void +fatal(const char *func, int rv) +{ + fprintf(stderr, "%s: %s\n", func, nng_strerror(rv)); + exit(1); +} + +char * +date(void) +{ + time_t now = time(&now); + struct tm *info = localtime(&now); + char *text = asctime(info); + text[strlen(text)-1] = '\0'; // remove '\n' + return (text); +} + +int +node0(const char *url) +{ + nng_socket sock; + int rv; + + if ((rv = nng_rep0_open(&sock)) != 0) { + fatal("nng_rep0_open", rv); + } + if ((rv = nng_listen(sock, url, NULL, 0)) != 0) { + fatal("nng_listen", rv); + } + for (;;) { + char *buf = NULL; + size_t sz; + if ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) != 0) { + fatal("nng_recv", rv); + } + if ((sz == (strlen(DATE) + 1)) && (strcmp(DATE, buf) == 0)) { + printf("NODE0: RECEIVED DATE REQUEST\n"); + char *d = date(); + printf("NODE0: SENDING DATE %s\n", d); + if ((rv = nng_send(sock, d, strlen(d) + 1, 0)) != 0) { + fatal("nng_send", rv); + } + } + nng_free(buf, sz); + } +} + +int +node1(const char *url) +{ + nng_socket sock; + int rv; + size_t sz; + char *buf = NULL; + + if ((rv = nng_req0_open(&sock)) != 0) { + fatal("nng_socket", rv); + } + if ((rv = nng_dial(sock, url, NULL, 0)) != 0) { + fatal("nng_dial", rv); + } + printf("NODE1: SENDING DATE REQUEST %s\n", DATE); + if ((rv = nng_send(sock, DATE, strlen(DATE)+1, 0)) != 0) { + fatal("nng_send", rv); + } + if ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) != 0) { + fatal("nng_recv", rv); + } + printf("NODE1: RECEIVED DATE %s\n", buf); // <1> + nng_free(buf, sz); + nng_close(sock); + return (0); +} + +int +main(const int argc, const char **argv) +{ + if ((argc > 1) && (strcmp(NODE0, argv[1]) == 0)) + return (node0(argv[2])); + + if ((argc > 1) && (strcmp(NODE1, argv[1]) == 0)) + return (node1(argv[2])); + + fprintf(stderr, "Usage: reqrep %s|%s <URL> ...\n", NODE0, NODE1); + return (1); +}
diff --git a/_adoc/gettingstarted/nng/src/reqrep.out b/_adoc/gettingstarted/nng/src/reqrep.out new file mode 100644 index 0000000..edfe64b --- /dev/null +++ b/_adoc/gettingstarted/nng/src/reqrep.out
@@ -0,0 +1,4 @@ +NODE1: SENDING DATE REQUEST DATE +NODE0: RECEIVED DATE REQUEST +NODE0: SENDING DATE Tue Jan 9 09:17:02 2018 +NODE1: RECEIVED DATE Tue Jan 9 09:17:02 2018
diff --git a/_adoc/gettingstarted/nng/src/reqrep.sh b/_adoc/gettingstarted/nng/src/reqrep.sh new file mode 100644 index 0000000..4a21bb3 --- /dev/null +++ b/_adoc/gettingstarted/nng/src/reqrep.sh
@@ -0,0 +1,3 @@ +./reqrep node0 ipc:///tmp/reqrep.ipc & node0=$! && sleep 1 +./reqrep node1 ipc:///tmp/reqrep.ipc +kill $node0
diff --git a/_adoc/gettingstarted/nng/src/survey.c b/_adoc/gettingstarted/nng/src/survey.c new file mode 100644 index 0000000..1909830 --- /dev/null +++ b/_adoc/gettingstarted/nng/src/survey.c
@@ -0,0 +1,110 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> + +#include <nng/nng.h> +#include <nng/protocol/survey0/survey.h> +#include <nng/protocol/survey0/respond.h> + +#define SERVER "server" +#define CLIENT "client" +#define DATE "DATE" + +void +fatal(const char *func, int rv) +{ + fprintf(stderr, "%s: %s\n", func, nng_strerror(rv)); + exit(1); +} + +char * +date(void) +{ + time_t now = time(&now); + struct tm *info = localtime(&now); + char *text = asctime(info); + text[strlen(text)-1] = '\0'; // remove '\n' + return (text); +} + +int +server(const char *url) +{ + nng_socket sock; + int rv; + + if ((rv = nng_surveyor0_open(&sock)) != 0) { + fatal("nng_surveyor0_open", rv); + } + if ((rv = nng_listen(sock, url, NULL, 0)) != 0) { + fatal("nng_listen", rv); + } + for (;;) { + printf("SERVER: SENDING DATE SURVEY REQUEST\n"); + if ((rv = nng_send(sock, DATE, strlen(DATE) + 1, 0)) != 0) { + fatal("nng_send", rv); + } + + for (;;) { + char *buf = NULL; + size_t sz; + rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC); + if (rv == NNG_ETIMEDOUT) { + break; + } + if (rv != 0) { + fatal("nng_recv", rv); + } + printf("SERVER: RECEIVED \"%s\" SURVEY RESPONSE\n", + buf); // <1> + nng_free(buf, sz); + } + + printf("SERVER: SURVEY COMPLETE\n"); + } +} + +int +client(const char *url, const char *name) +{ + nng_socket sock; + int rv; + + if ((rv = nng_respondent0_open(&sock)) != 0) { + fatal("nng_respondent0_open", rv); + } + if ((rv = nng_dial(sock, url, NULL, NNG_FLAG_NONBLOCK)) != 0) { + fatal("nng_dial", rv); + } + for (;;) { + char *buf = NULL; + size_t sz; + if ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) == 0) { + printf("CLIENT (%s): RECEIVED \"%s\" SURVEY REQUEST\n", + name, buf); // <1> + nng_free(buf, sz); + char *d = date(); + printf("CLIENT (%s): SENDING DATE SURVEY RESPONSE\n", + name); + if ((rv = nng_send(sock, d, strlen(d) + 1, 0)) != 0) { + fatal("nng_send", rv); + } + } + } +} + +int +main(const int argc, const char **argv) +{ + if ((argc >= 2) && (strcmp(SERVER, argv[1]) == 0)) + return (server(argv[2])); + + if ((argc >= 3) && (strcmp(CLIENT, argv[1]) == 0)) + return (client(argv[2], argv[3])); + + fprintf(stderr, "Usage: survey %s|%s <URL> <ARG> ...\n", + SERVER, CLIENT); + return 1; +}
diff --git a/_adoc/gettingstarted/nng/src/survey.out b/_adoc/gettingstarted/nng/src/survey.out new file mode 100644 index 0000000..d300e71 --- /dev/null +++ b/_adoc/gettingstarted/nng/src/survey.out
@@ -0,0 +1,23 @@ +SERVER: SENDING DATE SURVEY REQUEST +SERVER: SURVEY COMPLETE +SERVER: SENDING DATE SURVEY REQUEST +CLIENT (client2): RECEIVED "DATE" SURVEY REQUEST +CLIENT (client0): RECEIVED "DATE" SURVEY REQUEST +CLIENT (client1): RECEIVED "DATE" SURVEY REQUEST +CLIENT (client2): SENDING DATE SURVEY RESPONSE +CLIENT (client1): SENDING DATE SURVEY RESPONSE +CLIENT (client0): SENDING DATE SURVEY RESPONSE +SERVER: RECEIVED "Tue Jan 9 11:33:40 2018" SURVEY RESPONSE +SERVER: RECEIVED "Tue Jan 9 11:33:40 2018" SURVEY RESPONSE +SERVER: RECEIVED "Tue Jan 9 11:33:40 2018" SURVEY RESPONSE +SERVER: SURVEY COMPLETE +SERVER: SENDING DATE SURVEY REQUEST +CLIENT (client2): RECEIVED "DATE" SURVEY REQUEST +CLIENT (client2): SENDING DATE SURVEY RESPONSE +CLIENT (client0): RECEIVED "DATE" SURVEY REQUEST +CLIENT (client0): SENDING DATE SURVEY RESPONSE +CLIENT (client1): RECEIVED "DATE" SURVEY REQUEST +CLIENT (client1): SENDING DATE SURVEY RESPONSE +SERVER: RECEIVED "Tue Jan 9 11:33:41 2018" SURVEY RESPONSE +SERVER: RECEIVED "Tue Jan 9 11:33:41 2018" SURVEY RESPONSE +SERVER: RECEIVED "Tue Jan 9 11:33:41 2018" SURVEY RESPONSE
diff --git a/_adoc/gettingstarted/nng/src/survey.sh b/_adoc/gettingstarted/nng/src/survey.sh new file mode 100644 index 0000000..d5bac72 --- /dev/null +++ b/_adoc/gettingstarted/nng/src/survey.sh
@@ -0,0 +1,6 @@ +./survey server ipc:///tmp/survey.ipc & server=$! +./survey client ipc:///tmp/survey.ipc client0 & client0=$! +./survey client ipc:///tmp/survey.ipc client1 & client1=$! +./survey client ipc:///tmp/survey.ipc client2 & client2=$! +sleep 3 # <1> +kill $server $client0 $client1 $client2
diff --git a/_adoc/gettingstarted/nng/survey.adoc b/_adoc/gettingstarted/nng/survey.adoc new file mode 100644 index 0000000..1ff2397 --- /dev/null +++ b/_adoc/gettingstarted/nng/survey.adoc
@@ -0,0 +1,40 @@ +--- +layout: default +--- +:source-highlighter: coderay +:icons: font + +include::banner.adoc[] + +== Survey (Everybody Votes) + +image::../survey.png[Everybody Votes] + +The surveyor pattern is used to send a timed survey out, responses +are individually returned until the survey has expired. This pattern +is useful for service discovery and voting algorithms. + +.survey.c +[source,c] +---- +include::src/survey.c[] +---- +<1> Blithely assumes message is ASCIIZ string. Real code should check it. + +.Compilation +[source,bash] +---- +gcc survey.c -lnng -o survey +---- + +.Execution +[source,bash] +---- +include::src/survey.sh[] +---- +<1> The first survey times out with no responses because the clients aren’t connected yet. + +.Output +---- +include::src/survey.out[] +----
diff --git a/_adoc/gettingstarted/pair.adoc b/_adoc/gettingstarted/pair.adoc index b96a5db..77b22f8 100644 --- a/_adoc/gettingstarted/pair.adoc +++ b/_adoc/gettingstarted/pair.adoc
@@ -38,8 +38,9 @@ .Output ---- -NODE1: SENDING DATE REQUEST DATE -NODE0: RECEIVED DATE REQUEST -NODE0: SENDING DATE Sat Sep 7 17:39:01 2013 -NODE1: RECEIVED DATE Sat Sep 7 17:39:01 2013 +node0: SENDING "node0" +node1: SENDING "node1" +node1: RECEIVED"node0" +node0: SENDING "node0" +node0: RECEIVED"node1" ----
diff --git a/_adoc/gettingstarted/pubsub.adoc b/_adoc/gettingstarted/pubsub.adoc index f92f3be..43eb397 100644 --- a/_adoc/gettingstarted/pubsub.adoc +++ b/_adoc/gettingstarted/pubsub.adoc
@@ -23,7 +23,7 @@ .Compilation [source,bash] ---- -gcc pubsub.c /usr/local/lib/libnanomsg.a -o pubsub +gcc pubsub.c -lnanomsg -o pubsub ---- .Execution
diff --git a/_adoc/gettingstarted/survey.adoc b/_adoc/gettingstarted/survey.adoc index e871b58..b461f3a 100644 --- a/_adoc/gettingstarted/survey.adoc +++ b/_adoc/gettingstarted/survey.adoc
@@ -24,7 +24,7 @@ .Compilation [source,bash] ---- -gcc survey.c -lnanmosg -o survey +gcc survey.c -lnanomosg -o survey ---- .Execution
diff --git a/gettingstarted/bus.html b/gettingstarted/bus.html index 3535b1a..6b05e0d 100644 --- a/gettingstarted/bus.html +++ b/gettingstarted/bus.html
@@ -542,6 +542,19 @@ </tr> </table> </div> +<div class="admonitionblock tip"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-tip" title="Tip"></i> +</td> +<td class="content"> +If you want to use the experimental <a href="https://github.com/nanomsg/nng">nng</a> +library instead, see the document <a href="nng/index.html">Getting Started with 'nng'</a>. +</td> +</tr> +</table> +</div> </div> </div> <div class="sect1"> @@ -643,7 +656,7 @@ <div class="listingblock"> <div class="title">Compilation</div> <div class="content"> -<pre class="CodeRay highlight"><code data-lang="bash">gcc bus.c -lnanomsg.a -o bus</code></pre> +<pre class="CodeRay highlight"><code data-lang="bash">gcc bus.c -lnanomsg -o bus</code></pre> </div> </div> <div class="listingblock"> @@ -683,7 +696,7 @@ </div> <div id="footer"> <div id="footer-text"> -Last updated 2018-01-09 01:08:26 UTC +Last updated 2018-01-09 14:17:57 UTC </div> </div> </body>
diff --git a/gettingstarted/index.html b/gettingstarted/index.html index fcc7978..fe35986 100644 --- a/gettingstarted/index.html +++ b/gettingstarted/index.html
@@ -542,6 +542,19 @@ </tr> </table> </div> +<div class="admonitionblock tip"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-tip" title="Tip"></i> +</td> +<td class="content"> +If you want to use the experimental <a href="https://github.com/nanomsg/nng">nng</a> +library instead, see the document <a href="nng/index.html">Getting Started with 'nng'</a>. +</td> +</tr> +</table> +</div> </div> </div> <div class="sect1">
diff --git a/gettingstarted/nng/banner.html b/gettingstarted/nng/banner.html new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/gettingstarted/nng/banner.html
diff --git a/gettingstarted/nng/bus.html b/gettingstarted/nng/bus.html new file mode 100644 index 0000000..aaf437b --- /dev/null +++ b/gettingstarted/nng/bus.html
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href="index.html">Getting Started with 'nng'</a></h1> +</div> +<div id="content"> +<div id="preamble"> +<div class="sectionbody"> +<div class="admonitionblock note"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-note" title="Note"></i> +</td> +<td class="content"> +This document is derived from an original post by Tim Dysinger. +However, the examples here are for <a href="https://github.com/nanomsg/nng">nng</a> +instead of <a href="https://github.com/nanomsg/nanomsg">nanomsg</a>. For the legacy +nanomsg version of this, see <a href="../index.html">Getting Started with 'nanomsg'</a>. +</td> +</tr> +</table> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_bus_routing">Bus (Routing)</h2> +<div class="sectionbody"> +<div class="imageblock"> +<div class="content"> +<img src="../bus.png" alt="A Simple Bus"> +</div> +</div> +<div class="paragraph"> +<p>The bus protocol is useful for routing applications, or for building +fully interconnected mesh networks. In this pattern, messages are +sent to every directly connected peer.</p> +</div> +<div class="listingblock"> +<div class="title">bus.c</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include"><stdio.h></span> +<span class="preprocessor">#include</span> <span class="include"><stdlib.h></span> +<span class="preprocessor">#include</span> <span class="include"><string.h></span> +<span class="preprocessor">#include</span> <span class="include"><unistd.h></span> + +<span class="preprocessor">#include</span> <span class="include"><nng/nng.h></span> +<span class="preprocessor">#include</span> <span class="include"><nng/protocol/bus0/bus.h></span> + +<span class="directive">void</span> +fatal(<span class="directive">const</span> <span class="predefined-type">char</span> *func, <span class="predefined-type">int</span> rv) +{ + fprintf(stderr, <span class="string"><span class="delimiter">"</span><span class="content">%s: %s</span><span class="char">\n</span><span class="delimiter">"</span></span>, func, nng_strerror(rv)); + exit(<span class="integer">1</span>); +} + +<span class="predefined-type">int</span> +node(<span class="predefined-type">int</span> argc, <span class="predefined-type">char</span> **argv) +{ + nng_socket sock; + <span class="predefined-type">int</span> rv; + size_t sz; + + <span class="keyword">if</span> ((rv = nng_bus0_open(&sock)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_bus0_open</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">if</span> ((rv = nng_listen(sock, argv[<span class="integer">2</span>], <span class="predefined-constant">NULL</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_listen</span><span class="delimiter">"</span></span>, rv); + } + + sleep(<span class="integer">1</span>); <span class="comment">// wait for peers to bind</span> + <span class="keyword">if</span> (argc >= <span class="integer">3</span>) { + <span class="keyword">for</span> (<span class="predefined-type">int</span> x = <span class="integer">3</span>; x < argc; x++) { + <span class="keyword">if</span> ((rv = nng_dial(sock, argv[x], <span class="predefined-constant">NULL</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_dial</span><span class="delimiter">"</span></span>, rv); + } + } + } + + sleep(<span class="integer">1</span>); <span class="comment">// wait for connects to establish</span> + + <span class="comment">// SEND</span> + sz = strlen(argv[<span class="integer">1</span>]) + <span class="integer">1</span>; <span class="comment">// '\0' too</span> + printf(<span class="string"><span class="delimiter">"</span><span class="content">%s: SENDING '%s' ONTO BUS</span><span class="char">\n</span><span class="delimiter">"</span></span>, argv[<span class="integer">1</span>], argv[<span class="integer">1</span>]); + <span class="keyword">if</span> ((rv = nng_send(sock, argv[<span class="integer">1</span>], sz, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_send</span><span class="delimiter">"</span></span>, rv); + } + + <span class="comment">// RECV</span> + <span class="keyword">for</span> (;;) { + <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>; + size_t sz; + <span class="keyword">if</span> ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) !=<span class="integer">0</span>) { + <span class="keyword">if</span> (rv == NNG_ETIMEDOUT) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_recv</span><span class="delimiter">"</span></span>, rv); + } + } + printf(<span class="string"><span class="delimiter">"</span><span class="content">%s: RECEIVED '%s' FROM BUS</span><span class="char">\n</span><span class="delimiter">"</span></span>, argv[<span class="integer">1</span>], buf); <i class="conum" data-value="1"></i><b>(1)</b> + nng_free(buf, sz); + } + nng_close(sock); + <span class="keyword">return</span> (<span class="integer">0</span>); +} + +<span class="predefined-type">int</span> +main(<span class="predefined-type">int</span> argc, <span class="predefined-type">char</span> **argv) +{ + <span class="keyword">if</span> (argc >= <span class="integer">3</span>) { + <span class="keyword">return</span> (node(argc, argv)); + } + fprintf(stderr, <span class="string"><span class="delimiter">"</span><span class="content">Usage: bus <NODE_NAME> <URL> <URL> ...</span><span class="char">\n</span><span class="delimiter">"</span></span>); + <span class="keyword">return</span> <span class="integer">1</span>; +}</code></pre> +</div> +</div> +<div class="colist arabic"> +<table> +<tr> +<td><i class="conum" data-value="1"></i><b>1</b></td> +<td>Blithely assumes message is ASCIIZ string. Real code should check it.</td> +</tr> +</table> +</div> +<div class="listingblock"> +<div class="title">Compilation</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">gcc bus.c -lnng -o bus</code></pre> +</div> +</div> +<div class="listingblock"> +<div class="title">Execution</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">./bus node0 ipc:///tmp/node0.ipc ipc:///tmp/node1.ipc ipc:///tmp/node2.ipc & node0=$! +./bus node1 ipc:///tmp/node1.ipc ipc:///tmp/node2.ipc ipc:///tmp/node3.ipc & node1=$! +./bus node2 ipc:///tmp/node2.ipc ipc:///tmp/node3.ipc & node2=$! +./bus node3 ipc:///tmp/node3.ipc ipc:///tmp/node0.ipc & node3=$! +sleep 5 +kill $node0 $node1 $node2 $node3</code></pre> +</div> +</div> +<div class="listingblock"> +<div class="title">Output</div> +<div class="content"> +<pre>node3: SENDING 'node3' ONTO BUS +node0: SENDING 'node0' ONTO BUS +node1: SENDING 'node1' ONTO BUS +node2: SENDING 'node2' ONTO BUS +node0: RECEIVED 'node1' FROM BUS +node1: RECEIVED 'node0' FROM BUS +node2: RECEIVED 'node0' FROM BUS +node3: RECEIVED 'node1' FROM BUS +node0: RECEIVED 'node2' FROM BUS +node1: RECEIVED 'node2' FROM BUS +node3: RECEIVED 'node2' FROM BUS +node0: RECEIVED 'node3' FROM BUS +node2: RECEIVED 'node3' FROM BUS +node1: RECEIVED 'node3' FROM BUS +node3: RECEIVED 'node0' FROM BUS +node2: RECEIVED 'node1' FROM BUS</pre> +</div> +</div> +</div> +</div> +</div> +<div id="footer"> +<div id="footer-text"> +Last updated 2018-01-09 19:42:00 UTC +</div> +</div> +</body> +</html>
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href="#">Getting Started with 'nng'</a></h1> +</div> +<div id="content"> +<div id="preamble"> +<div class="sectionbody"> +<div class="admonitionblock note"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-note" title="Note"></i> +</td> +<td class="content"> +This document is derived from an original post by Tim Dysinger. +However, the examples here are for <a href="https://github.com/nanomsg/nng">nng</a> +instead of <a href="https://github.com/nanomsg/nanomsg">nanomsg</a>. For the legacy +nanomsg version of this, see <a href="../index.html">Getting Started with 'nanomsg'</a>. +</td> +</tr> +</table> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_messaging_patterns">Messaging Patterns</h2> +<div class="sectionbody"> +<div class="paragraph"> +<p><a href="http://nanomsg.github.io/nng">nng</a> is a messaging framework that attempts to +help solve common messaging problems with one of a few patterns ('protocols' +in nng parlance.)</p> +</div> +<div class="paragraph"> +<p>Following are examples of each pattern type in C.</p> +</div> +<div class="ulist"> +<ul> +<li> +<p><a href="pipeline.html">Pipeline (A One-Way Pipe)</a></p> +</li> +<li> +<p><a href="reqrep.html">Request/Reply (I ask, you answer)</a></p> +</li> +<li> +<p><a href="pair.html">Pair (Two Way Radio)</a></p> +</li> +<li> +<p><a href="pubsub.html">Pub/Sub (Topics & Broadcast)</a></p> +</li> +<li> +<p><a href="survey.html">Survey (Everybody Votes)</a></p> +</li> +<li> +<p><a href="bus.html">Bus (Routing)</a></p> +</li> +</ul> +</div> +</div> +</div> +</div> +<div id="footer"> +<div id="footer-text"> +Last updated 2018-01-09 02:10:15 UTC +</div> +</div> +</body> +</html>
diff --git a/gettingstarted/nng/pair.html b/gettingstarted/nng/pair.html new file mode 100644 index 0000000..f4a8a28 --- /dev/null +++ b/gettingstarted/nng/pair.html
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href="index.html">Getting Started with 'nng'</a></h1> +</div> +<div id="content"> +<div id="preamble"> +<div class="sectionbody"> +<div class="admonitionblock note"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-note" title="Note"></i> +</td> +<td class="content"> +This document is derived from an original post by Tim Dysinger. +However, the examples here are for <a href="https://github.com/nanomsg/nng">nng</a> +instead of <a href="https://github.com/nanomsg/nanomsg">nanomsg</a>. For the legacy +nanomsg version of this, see <a href="../index.html">Getting Started with 'nanomsg'</a>. +</td> +</tr> +</table> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_pair_two_way_radio">Pair (Two Way Radio)</h2> +<div class="sectionbody"> +<div class="imageblock"> +<div class="content"> +<img src="../pair.png" alt="Two Way Radio"> +</div> +</div> +<div class="paragraph"> +<p>The pair pattern is used when there a one-to-one peer relationship. +Only one peer may be connected to another peer at a time, but both +may speak freely.</p> +</div> +<div class="listingblock"> +<div class="title">pair.c</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include"><stdio.h></span> +<span class="preprocessor">#include</span> <span class="include"><stdlib.h></span> +<span class="preprocessor">#include</span> <span class="include"><string.h></span> +<span class="preprocessor">#include</span> <span class="include"><unistd.h></span> + +<span class="preprocessor">#include</span> <span class="include"><nng/nng.h></span> +<span class="preprocessor">#include</span> <span class="include"><nng/protocol/pair0/pair.h></span> + +<span class="preprocessor">#define</span> NODE0 <span class="string"><span class="delimiter">"</span><span class="content">node0</span><span class="delimiter">"</span></span> +<span class="preprocessor">#define</span> NODE1 <span class="string"><span class="delimiter">"</span><span class="content">node1</span><span class="delimiter">"</span></span> + +<span class="directive">void</span> +fatal(<span class="directive">const</span> <span class="predefined-type">char</span> *func, <span class="predefined-type">int</span> rv) +{ + fprintf(stderr, <span class="string"><span class="delimiter">"</span><span class="content">%s: %s</span><span class="char">\n</span><span class="delimiter">"</span></span>, func, nng_strerror(rv)); + exit(<span class="integer">1</span>); +} + +<span class="predefined-type">int</span> +send_name(nng_socket sock, <span class="predefined-type">char</span> *name) +{ + <span class="predefined-type">int</span> rv; + printf(<span class="string"><span class="delimiter">"</span><span class="content">%s: SENDING </span><span class="char">\"</span><span class="content">%s</span><span class="char">\"</span><span class="char">\n</span><span class="delimiter">"</span></span>, name, name); + <span class="keyword">if</span> ((rv = nng_send(sock, name, strlen(name) + <span class="integer">1</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_send</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">return</span> (rv); +} + +<span class="predefined-type">int</span> +recv_name(nng_socket sock, <span class="predefined-type">char</span> *name) +{ + <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>; + <span class="predefined-type">int</span> rv; + size_t sz; + <span class="keyword">if</span> ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) == <span class="integer">0</span>) { + printf(<span class="string"><span class="delimiter">"</span><span class="content">%s: RECEIVED </span><span class="char">\"</span><span class="content">%s</span><span class="char">\"</span><span class="char">\n</span><span class="delimiter">"</span></span>, name, buf); <i class="conum" data-value="1"></i><b>(1)</b> + nng_free(buf, sz); + } + <span class="keyword">return</span> (rv); +} + +<span class="predefined-type">int</span> +send_recv(nng_socket sock, <span class="predefined-type">char</span> *name) +{ + <span class="predefined-type">int</span> rv; + <span class="keyword">if</span> ((rv = nng_setopt_ms(sock, NNG_OPT_RECVTIMEO, <span class="integer">100</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_setopt_ms</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">for</span> (;;) { + recv_name(sock, name); + sleep(<span class="integer">1</span>); + send_name(sock, name); + } +} + +<span class="predefined-type">int</span> +node0(<span class="directive">const</span> <span class="predefined-type">char</span> *url) +{ + nng_socket sock; + <span class="predefined-type">int</span> rv; + <span class="keyword">if</span> ((rv = nng_pair0_open(&sock)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_pair0_open</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">if</span> ((rv = nng_listen(sock, url, <span class="predefined-constant">NULL</span>, <span class="integer">0</span>)) !=<span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_listen</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">return</span> (send_recv(sock, NODE0)); +} + +<span class="predefined-type">int</span> +node1(<span class="directive">const</span> <span class="predefined-type">char</span> *url) +{ + nng_socket sock; + <span class="predefined-type">int</span> rv; + sleep(<span class="integer">1</span>); + <span class="keyword">if</span> ((rv = nng_pair0_open(&sock)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_pair0_open</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">if</span> ((rv = nng_dial(sock, url, <span class="predefined-constant">NULL</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_dial</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">return</span> (send_recv(sock, NODE1)); +} + +<span class="predefined-type">int</span> +main(<span class="predefined-type">int</span> argc, <span class="predefined-type">char</span> **argv) +{ + <span class="keyword">if</span> ((argc > <span class="integer">1</span>) && (strcmp(NODE0, argv[<span class="integer">1</span>]) == <span class="integer">0</span>)) + <span class="keyword">return</span> (node0(argv[<span class="integer">2</span>])); + + <span class="keyword">if</span> ((argc > <span class="integer">1</span>) && (strcmp(NODE1, argv[<span class="integer">1</span>]) == <span class="integer">0</span>)) + <span class="keyword">return</span> (node1(argv[<span class="integer">2</span>])); + + fprintf(stderr, <span class="string"><span class="delimiter">"</span><span class="content">Usage: pair %s|%s <URL> <ARG> ...</span><span class="char">\n</span><span class="delimiter">"</span></span>, NODE0, NODE1); + <span class="keyword">return</span> <span class="integer">1</span>; +}</code></pre> +</div> +</div> +<div class="colist arabic"> +<table> +<tr> +<td><i class="conum" data-value="1"></i><b>1</b></td> +<td>Blithely assumes message is ASCIIZ string. Real code should check it.</td> +</tr> +</table> +</div> +<div class="listingblock"> +<div class="title">Compilation</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">gcc pair.c -lnng -o pair</code></pre> +</div> +</div> +<div class="listingblock"> +<div class="title">Execution</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">./pair node0 ipc:///tmp/pair.ipc & node0=$! +./pair node1 ipc:///tmp/pair.ipc & node1=$! +sleep 3 +kill $node0 $node1</code></pre> +</div> +</div> +<div class="listingblock"> +<div class="title">Output</div> +<div class="content"> +<pre>node0: SENDING "node0" +node1: RECEIVED "node0" +node1: SENDING "node1" +node0: SENDING "node0" +node0: RECEIVED "node1" +node1: RECEIVED "node0"</pre> +</div> +</div> +</div> +</div> +</div> +<div id="footer"> +<div id="footer-text"> +Last updated 2018-01-09 19:42:00 UTC +</div> +</div> +</body> +</html>
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href="index.html">Getting Started with 'nng'</a></h1> +</div> +<div id="content"> +<div id="preamble"> +<div class="sectionbody"> +<div class="admonitionblock note"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-note" title="Note"></i> +</td> +<td class="content"> +This document is derived from an original post by Tim Dysinger. +However, the examples here are for <a href="https://github.com/nanomsg/nng">nng</a> +instead of <a href="https://github.com/nanomsg/nanomsg">nanomsg</a>. For the legacy +nanomsg version of this, see <a href="../index.html">Getting Started with 'nanomsg'</a>. +</td> +</tr> +</table> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_pipeline_a_one_way_pipe">Pipeline (A One-Way Pipe)</h2> +<div class="sectionbody"> +<div class="imageblock"> +<div class="content"> +<img src="../pipeline.png" alt="A One-Way Pipe"> +</div> +</div> +<div class="paragraph"> +<p>This pattern is useful for solving producer/consumer problems, including +load-balancing. Messages flow from the push side to the pull side. If +multiple peers are connected, the pattern attempts to distribute fairly.</p> +</div> +<div class="listingblock"> +<div class="title">pipeline.c</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="C"><span class="preprocessor">#include</span> <span class="include"><stdlib.h></span> +<span class="preprocessor">#include</span> <span class="include"><stdio.h></span> +<span class="preprocessor">#include</span> <span class="include"><string.h></span> +<span class="preprocessor">#include</span> <span class="include"><unistd.h></span> + +<span class="preprocessor">#include</span> <span class="include"><nng/nng.h></span> +<span class="preprocessor">#include</span> <span class="include"><nng/protocol/pipeline0/pull.h></span> +<span class="preprocessor">#include</span> <span class="include"><nng/protocol/pipeline0/push.h></span> + +<span class="preprocessor">#define</span> NODE0 <span class="string"><span class="delimiter">"</span><span class="content">node0</span><span class="delimiter">"</span></span> +<span class="preprocessor">#define</span> NODE1 <span class="string"><span class="delimiter">"</span><span class="content">node1</span><span class="delimiter">"</span></span> + +<span class="directive">void</span> +fatal(<span class="directive">const</span> <span class="predefined-type">char</span> *func, <span class="predefined-type">int</span> rv) +{ + fprintf(stderr, <span class="string"><span class="delimiter">"</span><span class="content">%s: %s</span><span class="char">\n</span><span class="delimiter">"</span></span>, func, nng_strerror(rv)); + exit(<span class="integer">1</span>); +} + +<span class="predefined-type">int</span> +node0(<span class="directive">const</span> <span class="predefined-type">char</span> *url) +{ + nng_socket sock; + <span class="predefined-type">int</span> rv; + + <span class="keyword">if</span> ((rv = nng_pull0_open(&sock)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_pull0_open</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">if</span> ((rv = nng_listen(sock, url, <span class="predefined-constant">NULL</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_listen</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">for</span> (;;) { + <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>; + size_t sz; + <span class="keyword">if</span> ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_recv</span><span class="delimiter">"</span></span>, rv); + } + printf(<span class="string"><span class="delimiter">"</span><span class="content">NODE0: RECEIVED </span><span class="char">\"</span><span class="content">%s</span><span class="char">\"</span><span class="char">\n</span><span class="delimiter">"</span></span>, buf); <i class="conum" data-value="1"></i><b>(1)</b> + nng_free(buf, sz); + } +} + +<span class="predefined-type">int</span> +node1(<span class="directive">const</span> <span class="predefined-type">char</span> *url, <span class="predefined-type">char</span> *msg) +{ + <span class="predefined-type">int</span> sz_msg = strlen(msg) + <span class="integer">1</span>; <span class="comment">// '\0' too</span> + nng_socket sock; + <span class="predefined-type">int</span> rv; + <span class="predefined-type">int</span> bytes; + + <span class="keyword">if</span> ((rv = nng_push0_open(&sock)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_push0_open</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">if</span> ((rv = nng_dial(sock, url, <span class="predefined-constant">NULL</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_dial</span><span class="delimiter">"</span></span>, rv); + } + printf(<span class="string"><span class="delimiter">"</span><span class="content">NODE1: SENDING </span><span class="char">\"</span><span class="content">%s</span><span class="char">\"</span><span class="char">\n</span><span class="delimiter">"</span></span>, msg); + <span class="keyword">if</span> ((rv = nng_send(sock, msg, strlen(msg)+<span class="integer">1</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_send</span><span class="delimiter">"</span></span>, rv); + } + sleep(<span class="integer">1</span>); <span class="comment">// wait for messages to flush before shutting down</span> + nng_close(sock); + <span class="keyword">return</span> (<span class="integer">0</span>); +} + +<span class="predefined-type">int</span> +main(<span class="predefined-type">int</span> argc, <span class="predefined-type">char</span> **argv) +{ + <span class="keyword">if</span> ((argc > <span class="integer">1</span>) && (strcmp(NODE0, argv[<span class="integer">1</span>]) == <span class="integer">0</span>)) + <span class="keyword">return</span> (node0(argv[<span class="integer">2</span>])); + + <span class="keyword">if</span> ((argc > <span class="integer">2</span>) && (strcmp(NODE1, argv[<span class="integer">1</span>]) == <span class="integer">0</span>)) + <span class="keyword">return</span> (node1(argv[<span class="integer">2</span>], argv[<span class="integer">3</span>])); + + fprintf(stderr, <span class="string"><span class="delimiter">"</span><span class="content">Usage: pipeline %s|%s <URL> <ARG> ...'</span><span class="char">\n</span><span class="delimiter">"</span></span>, + NODE0, NODE1); + <span class="keyword">return</span> (<span class="integer">1</span>); +}</code></pre> +</div> +</div> +<div class="colist arabic"> +<table> +<tr> +<td><i class="conum" data-value="1"></i><b>1</b></td> +<td>Blithely assumes message is ASCIIZ string. Real code should check it.</td> +</tr> +</table> +</div> +<div class="listingblock"> +<div class="title">Compilation</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">gcc pipeline.c -lnng -o pipeline</code></pre> +</div> +</div> +<div class="listingblock"> +<div class="title">Execution</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">./pipeline node0 ipc:///tmp/pipeline.ipc & node0=$! && sleep 1 +./pipeline node1 ipc:///tmp/pipeline.ipc "Hello, World!" +./pipeline node1 ipc:///tmp/pipeline.ipc "Goodbye." +kill $node0</code></pre> +</div> +</div> +<div class="listingblock"> +<div class="title">Output</div> +<div class="content"> +<pre>NODE1: SENDING "Hello, World!" +NODE0: RECEIVED "Hello, World!" +NODE1: SENDING "Goodbye." +NODE0: RECEIVED "Goodbye."</pre> +</div> +</div> +</div> +</div> +</div> +<div id="footer"> +<div id="footer-text"> +Last updated 2018-01-09 19:42:00 UTC +</div> +</div> +</body> +</html>
diff --git a/gettingstarted/nng/pubsub.html b/gettingstarted/nng/pubsub.html new file mode 100644 index 0000000..bf4c94d --- /dev/null +++ b/gettingstarted/nng/pubsub.html
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href="index.html">Getting Started with 'nng'</a></h1> +</div> +<div id="content"> +<div id="preamble"> +<div class="sectionbody"> +<div class="admonitionblock note"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-note" title="Note"></i> +</td> +<td class="content"> +This document is derived from an original post by Tim Dysinger. +However, the examples here are for <a href="https://github.com/nanomsg/nng">nng</a> +instead of <a href="https://github.com/nanomsg/nanomsg">nanomsg</a>. For the legacy +nanomsg version of this, see <a href="../index.html">Getting Started with 'nanomsg'</a>. +</td> +</tr> +</table> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_pub_sub_topics_broadcast">Pub/Sub (Topics & Broadcast)</h2> +<div class="sectionbody"> +<div class="imageblock"> +<div class="content"> +<img src="../pubsub.png" alt="Topics & Broadcast"> +</div> +</div> +<div class="paragraph"> +<p>This pattern is used to allow a single broadcaster to publish messages +to many subscribers, which may choose to limit which messages they receive.</p> +</div> +<div class="listingblock"> +<div class="title">pubsub.c</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include"><stdlib.h></span> +<span class="preprocessor">#include</span> <span class="include"><stdio.h></span> +<span class="preprocessor">#include</span> <span class="include"><string.h></span> +<span class="preprocessor">#include</span> <span class="include"><time.h></span> +<span class="preprocessor">#include</span> <span class="include"><unistd.h></span> + +<span class="preprocessor">#include</span> <span class="include"><nng/nng.h></span> +<span class="preprocessor">#include</span> <span class="include"><nng/protocol/pubsub0/pub.h></span> +<span class="preprocessor">#include</span> <span class="include"><nng/protocol/pubsub0/sub.h></span> + +<span class="preprocessor">#define</span> SERVER <span class="string"><span class="delimiter">"</span><span class="content">server</span><span class="delimiter">"</span></span> +<span class="preprocessor">#define</span> CLIENT <span class="string"><span class="delimiter">"</span><span class="content">client</span><span class="delimiter">"</span></span> + +<span class="directive">void</span> +fatal(<span class="directive">const</span> <span class="predefined-type">char</span> *func, <span class="predefined-type">int</span> rv) +{ + fprintf(stderr, <span class="string"><span class="delimiter">"</span><span class="content">%s: %s</span><span class="char">\n</span><span class="delimiter">"</span></span>, func, nng_strerror(rv)); +} + +<span class="predefined-type">char</span> * +date(<span class="directive">void</span>) +{ + time_t now = time(&now); + <span class="keyword">struct</span> tm *info = localtime(&now); + <span class="predefined-type">char</span> *text = asctime(info); + text[strlen(text)-<span class="integer">1</span>] = <span class="char">'\0'</span>; <span class="comment">// remove '\n'</span> + <span class="keyword">return</span> (text); +} + +<span class="predefined-type">int</span> +server(<span class="directive">const</span> <span class="predefined-type">char</span> *url) +{ + nng_socket sock; + <span class="predefined-type">int</span> rv; + + <span class="keyword">if</span> ((rv = nng_pub0_open(&sock)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_pub0_open</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">if</span> ((rv = nng_listen(sock, url, <span class="predefined-constant">NULL</span>, <span class="integer">0</span>)) < <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_listen</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">for</span> (;;) { + <span class="predefined-type">char</span> *d = date(); + printf(<span class="string"><span class="delimiter">"</span><span class="content">SERVER: PUBLISHING DATE %s</span><span class="char">\n</span><span class="delimiter">"</span></span>, d); + <span class="keyword">if</span> ((rv = nng_send(sock, d, strlen(d) + <span class="integer">1</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_send</span><span class="delimiter">"</span></span>, rv); + } + sleep(<span class="integer">1</span>); + } +} + +<span class="predefined-type">int</span> +client(<span class="directive">const</span> <span class="predefined-type">char</span> *url, <span class="directive">const</span> <span class="predefined-type">char</span> *name) +{ + nng_socket sock; + <span class="predefined-type">int</span> rv; + + <span class="keyword">if</span> ((rv = nng_sub0_open(&sock)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_sub0_open</span><span class="delimiter">"</span></span>, rv); + } + + <span class="comment">// subscribe to everything (empty means all topics)</span> + <span class="keyword">if</span> ((rv = nng_setopt(sock, NNG_OPT_SUB_SUBSCRIBE, <span class="string"><span class="delimiter">"</span><span class="delimiter">"</span></span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_setopt</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">if</span> ((rv = nng_dial(sock, url, <span class="predefined-constant">NULL</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_dial</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">for</span> (;;) { + <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>; + size_t sz; + <span class="keyword">if</span> ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_recv</span><span class="delimiter">"</span></span>, rv); + } + printf(<span class="string"><span class="delimiter">"</span><span class="content">CLIENT (%s): RECEIVED %s</span><span class="char">\n</span><span class="delimiter">"</span></span>, name, buf); <i class="conum" data-value="1"></i><b>(1)</b> + nng_free(buf, sz); + } +} + +<span class="predefined-type">int</span> +main(<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv) +{ + <span class="keyword">if</span> ((argc >= <span class="integer">2</span>) && (strcmp(SERVER, argv[<span class="integer">1</span>]) == <span class="integer">0</span>)) + <span class="keyword">return</span> (server(argv[<span class="integer">2</span>])); + + <span class="keyword">if</span> ((argc >= <span class="integer">3</span>) && (strcmp(CLIENT, argv[<span class="integer">1</span>]) == <span class="integer">0</span>)) + <span class="keyword">return</span> (client (argv[<span class="integer">2</span>], argv[<span class="integer">3</span>])); + + fprintf(stderr, <span class="string"><span class="delimiter">"</span><span class="content">Usage: pubsub %s|%s <URL> <ARG> ...</span><span class="char">\n</span><span class="delimiter">"</span></span>, + SERVER, CLIENT); + <span class="keyword">return</span> <span class="integer">1</span>; +}</code></pre> +</div> +</div> +<div class="colist arabic"> +<table> +<tr> +<td><i class="conum" data-value="1"></i><b>1</b></td> +<td>Blithely assumes message is ASCIIZ string. Real code should check it.</td> +</tr> +</table> +</div> +<div class="listingblock"> +<div class="title">Compilation</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">gcc pubsub.c -lnng -o pubsub</code></pre> +</div> +</div> +<div class="listingblock"> +<div class="title">Execution</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">./pubsub server ipc:///tmp/pubsub.ipc & server=$! && sleep 1 +./pubsub client ipc:///tmp/pubsub.ipc client0 & client0=$! +./pubsub client ipc:///tmp/pubsub.ipc client1 & client1=$! +./pubsub client ipc:///tmp/pubsub.ipc client2 & client2=$! +sleep 5 +kill $server $client0 $client1 $client2</code></pre> +</div> +</div> +<div class="listingblock"> +<div class="title">Output</div> +<div class="content"> +<pre>SERVER: PUBLISHING DATE Tue Jan 9 08:21:31 2018 +SERVER: PUBLISHING DATE Tue Jan 9 08:21:32 2018 +CLIENT (client2): RECEIVED Tue Jan 9 08:21:32 2018 +CLIENT (client1): RECEIVED Tue Jan 9 08:21:32 2018 +CLIENT (client0): RECEIVED Tue Jan 9 08:21:32 2018 +SERVER: PUBLISHING DATE Tue Jan 9 08:21:33 2018 +CLIENT (client0): RECEIVED Tue Jan 9 08:21:33 2018 +CLIENT (client2): RECEIVED Tue Jan 9 08:21:33 2018 +CLIENT (client1): RECEIVED Tue Jan 9 08:21:33 2018 +SERVER: PUBLISHING DATE Tue Jan 9 08:21:34 2018 +CLIENT (client2): RECEIVED Tue Jan 9 08:21:34 2018 +CLIENT (client0): RECEIVED Tue Jan 9 08:21:34 2018 +CLIENT (client1): RECEIVED Tue Jan 9 08:21:34 2018 +SERVER: PUBLISHING DATE Tue Jan 9 08:21:35 2018 +CLIENT (client0): RECEIVED Tue Jan 9 08:21:35 2018 +CLIENT (client1): RECEIVED Tue Jan 9 08:21:35 2018 +CLIENT (client2): RECEIVED Tue Jan 9 08:21:35 2018 +SERVER: PUBLISHING DATE Tue Jan 9 08:21:36 2018 +CLIENT (client0): RECEIVED Tue Jan 9 08:21:36 2018 +CLIENT (client1): RECEIVED Tue Jan 9 08:21:36 2018 +CLIENT (client2): RECEIVED Tue Jan 9 08:21:36 2018</pre> +</div> +</div> +</div> +</div> +</div> +<div id="footer"> +<div id="footer-text"> +Last updated 2018-01-09 19:42:00 UTC +</div> +</div> +</body> +</html>
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href="index.html">Getting Started with 'nng'</a></h1> +</div> +<div id="content"> +<div id="preamble"> +<div class="sectionbody"> +<div class="admonitionblock note"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-note" title="Note"></i> +</td> +<td class="content"> +This document is derived from an original post by Tim Dysinger. +However, the examples here are for <a href="https://github.com/nanomsg/nng">nng</a> +instead of <a href="https://github.com/nanomsg/nanomsg">nanomsg</a>. +</td> +</tr> +</table> +</div> +<div class="paragraph"> +<p></p> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_pub_sub_topics_broadcast">Pub/Sub (Topics & Broadcast)</h2> +<div class="sectionbody"> +<div class="imageblock"> +<div class="content"> +<img src="../pubsub.png" alt="Topics & Broadcast"> +</div> +</div> +<div class="paragraph"> +<p>This pattern is used to allow a single broadcaster to publish messages +to many subscribers, which may choose to limit which messages they receive.</p> +</div> +<div class="listingblock"> +<div class="title">pubsub.c</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="c">Unresolved directive in /Users/garrett/Projects/nanomsg-pages/_adoc/gettingstarted/tmpl/pubsub.adoc - include::src/pubsub.c[]</code></pre> +</div> +</div> +<div class="colist arabic"> +<table> +<tr> +<td><i class="conum" data-value="1"></i><b>1</b></td> +<td>Blithely assumes message is ASCIIZ string. Real code should check it.</td> +</tr> +</table> +</div> +<div class="listingblock"> +<div class="title">Compilation</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">Unresolved directive in /Users/garrett/Projects/nanomsg-pages/_adoc/gettingstarted/tmpl/pubsub.adoc - include::compile.adoc[]</code></pre> +</div> +</div> +<div class="listingblock"> +<div class="title">Execution</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">Unresolved directive in /Users/garrett/Projects/nanomsg-pages/_adoc/gettingstarted/tmpl/pubsub.adoc - include::src/pubsub.sh[]</code></pre> +</div> +</div> +<div class="listingblock"> +<div class="title">Output</div> +<div class="content"> +<pre>Unresolved directive in /Users/garrett/Projects/nanomsg-pages/_adoc/gettingstarted/tmpl/pubsub.adoc - include::src/pubsub.out[]</pre> +</div> +</div> +</div> +</div> +</div> +<div id="footer"> +<div id="footer-text"> +Last updated 2018-01-09 16:56:19 UTC +</div> +</div> +</body> +</html>
diff --git a/gettingstarted/nng/reqrep.html b/gettingstarted/nng/reqrep.html new file mode 100644 index 0000000..0d63ff5 --- /dev/null +++ b/gettingstarted/nng/reqrep.html
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href="index.html">Getting Started with 'nng'</a></h1> +</div> +<div id="content"> +<div id="preamble"> +<div class="sectionbody"> +<div class="admonitionblock note"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-note" title="Note"></i> +</td> +<td class="content"> +This document is derived from an original post by Tim Dysinger. +However, the examples here are for <a href="https://github.com/nanomsg/nng">nng</a> +instead of <a href="https://github.com/nanomsg/nanomsg">nanomsg</a>. For the legacy +nanomsg version of this, see <a href="../index.html">Getting Started with 'nanomsg'</a>. +</td> +</tr> +</table> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_request_reply_i_ask_you_answer">Request/Reply (I ask, you answer)</h2> +<div class="sectionbody"> +<div class="imageblock"> +<div class="content"> +<img src="../reqrep.png" alt="I ask" width="you answer"> +</div> +</div> +<div class="paragraph"> +<p>Request/Reply is used for synchronous communications where each question +is responded with a single answer, for example remote procedure calls (RPCs). +Like <a href="pipeline.html">Pipeline</a>, it also can perform load-balancing. This +is the only reliable messaging pattern in the suite, as it automatically +will retry if a request is not matched with a response.</p> +</div> +<div class="listingblock"> +<div class="title">reqprep.c</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include"><stdlib.h></span> +<span class="preprocessor">#include</span> <span class="include"><stdio.h></span> +<span class="preprocessor">#include</span> <span class="include"><string.h></span> +<span class="preprocessor">#include</span> <span class="include"><time.h></span> + +<span class="preprocessor">#include</span> <span class="include"><nng/nng.h></span> +<span class="preprocessor">#include</span> <span class="include"><nng/protocol/reqrep0/rep.h></span> +<span class="preprocessor">#include</span> <span class="include"><nng/protocol/reqrep0/req.h></span> + +<span class="preprocessor">#define</span> NODE0 <span class="string"><span class="delimiter">"</span><span class="content">node0</span><span class="delimiter">"</span></span> +<span class="preprocessor">#define</span> NODE1 <span class="string"><span class="delimiter">"</span><span class="content">node1</span><span class="delimiter">"</span></span> +<span class="preprocessor">#define</span> DATE <span class="string"><span class="delimiter">"</span><span class="content">DATE</span><span class="delimiter">"</span></span> + +<span class="directive">void</span> +fatal(<span class="directive">const</span> <span class="predefined-type">char</span> *func, <span class="predefined-type">int</span> rv) +{ + fprintf(stderr, <span class="string"><span class="delimiter">"</span><span class="content">%s: %s</span><span class="char">\n</span><span class="delimiter">"</span></span>, func, nng_strerror(rv)); + exit(<span class="integer">1</span>); +} + +<span class="predefined-type">char</span> * +date(<span class="directive">void</span>) +{ + time_t now = time(&now); + <span class="keyword">struct</span> tm *info = localtime(&now); + <span class="predefined-type">char</span> *text = asctime(info); + text[strlen(text)-<span class="integer">1</span>] = <span class="char">'\0'</span>; <span class="comment">// remove '\n'</span> + <span class="keyword">return</span> (text); +} + +<span class="predefined-type">int</span> +node0(<span class="directive">const</span> <span class="predefined-type">char</span> *url) +{ + nng_socket sock; + <span class="predefined-type">int</span> rv; + + <span class="keyword">if</span> ((rv = nng_rep0_open(&sock)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_rep0_open</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">if</span> ((rv = nng_listen(sock, url, <span class="predefined-constant">NULL</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_listen</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">for</span> (;;) { + <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>; + size_t sz; + <span class="keyword">if</span> ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_recv</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">if</span> ((sz == (strlen(DATE) + <span class="integer">1</span>)) && (strcmp(DATE, buf) == <span class="integer">0</span>)) { + printf(<span class="string"><span class="delimiter">"</span><span class="content">NODE0: RECEIVED DATE REQUEST</span><span class="char">\n</span><span class="delimiter">"</span></span>); + <span class="predefined-type">char</span> *d = date(); + printf(<span class="string"><span class="delimiter">"</span><span class="content">NODE0: SENDING DATE %s</span><span class="char">\n</span><span class="delimiter">"</span></span>, d); + <span class="keyword">if</span> ((rv = nng_send(sock, d, strlen(d) + <span class="integer">1</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_send</span><span class="delimiter">"</span></span>, rv); + } + } + nng_free(buf, sz); + } +} + +<span class="predefined-type">int</span> +node1(<span class="directive">const</span> <span class="predefined-type">char</span> *url) +{ + nng_socket sock; + <span class="predefined-type">int</span> rv; + size_t sz; + <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>; + + <span class="keyword">if</span> ((rv = nng_req0_open(&sock)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_socket</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">if</span> ((rv = nng_dial(sock, url, <span class="predefined-constant">NULL</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_dial</span><span class="delimiter">"</span></span>, rv); + } + printf(<span class="string"><span class="delimiter">"</span><span class="content">NODE1: SENDING DATE REQUEST %s</span><span class="char">\n</span><span class="delimiter">"</span></span>, DATE); + <span class="keyword">if</span> ((rv = nng_send(sock, DATE, strlen(DATE)+<span class="integer">1</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_send</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">if</span> ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_recv</span><span class="delimiter">"</span></span>, rv); + } + printf(<span class="string"><span class="delimiter">"</span><span class="content">NODE1: RECEIVED DATE %s</span><span class="char">\n</span><span class="delimiter">"</span></span>, buf); <i class="conum" data-value="1"></i><b>(1)</b> + nng_free(buf, sz); + nng_close(sock); + <span class="keyword">return</span> (<span class="integer">0</span>); +} + +<span class="predefined-type">int</span> +main(<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv) +{ + <span class="keyword">if</span> ((argc > <span class="integer">1</span>) && (strcmp(NODE0, argv[<span class="integer">1</span>]) == <span class="integer">0</span>)) + <span class="keyword">return</span> (node0(argv[<span class="integer">2</span>])); + + <span class="keyword">if</span> ((argc > <span class="integer">1</span>) && (strcmp(NODE1, argv[<span class="integer">1</span>]) == <span class="integer">0</span>)) + <span class="keyword">return</span> (node1(argv[<span class="integer">2</span>])); + + fprintf(stderr, <span class="string"><span class="delimiter">"</span><span class="content">Usage: reqrep %s|%s <URL> ...</span><span class="char">\n</span><span class="delimiter">"</span></span>, NODE0, NODE1); + <span class="keyword">return</span> (<span class="integer">1</span>); +}</code></pre> +</div> +</div> +<div class="colist arabic"> +<table> +<tr> +<td><i class="conum" data-value="1"></i><b>1</b></td> +<td>Blithely assumes message is ASCIIZ string. Real code should check it.</td> +</tr> +</table> +</div> +<div class="listingblock"> +<div class="title">Compilation</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">gcc reqrep.c -lnng -o reqrep</code></pre> +</div> +</div> +<div class="listingblock"> +<div class="title">Execution</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">./reqrep node0 ipc:///tmp/reqrep.ipc & node0=$! && sleep 1 +./reqrep node1 ipc:///tmp/reqrep.ipc +kill $node0</code></pre> +</div> +</div> +<div class="listingblock"> +<div class="title">Output</div> +<div class="content"> +<pre>NODE1: SENDING DATE REQUEST DATE +NODE0: RECEIVED DATE REQUEST +NODE0: SENDING DATE Tue Jan 9 09:17:02 2018 +NODE1: RECEIVED DATE Tue Jan 9 09:17:02 2018</pre> +</div> +</div> +</div> +</div> +</div> +<div id="footer"> +<div id="footer-text"> +Last updated 2018-01-09 19:42:00 UTC +</div> +</div> +</body> +</html>
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href="index.html">Getting Started with 'nng'</a></h1> +</div> +<div id="content"> +<div id="preamble"> +<div class="sectionbody"> +<div class="admonitionblock note"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-note" title="Note"></i> +</td> +<td class="content"> +This document is derived from an original post by Tim Dysinger. +However, the examples here are for <a href="https://github.com/nanomsg/nng">nng</a> +instead of <a href="https://github.com/nanomsg/nanomsg">nanomsg</a>. For the legacy +nanomsg version of this, see <a href="../index.html">Getting Started with 'nanomsg'</a>. +</td> +</tr> +</table> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_survey_everybody_votes">Survey (Everybody Votes)</h2> +<div class="sectionbody"> +<div class="imageblock"> +<div class="content"> +<img src="../survey.png" alt="Everybody Votes"> +</div> +</div> +<div class="paragraph"> +<p>The surveyor pattern is used to send a timed survey out, responses +are individually returned until the survey has expired. This pattern +is useful for service discovery and voting algorithms.</p> +</div> +<div class="listingblock"> +<div class="title">survey.c</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include"><stdio.h></span> +<span class="preprocessor">#include</span> <span class="include"><stdlib.h></span> +<span class="preprocessor">#include</span> <span class="include"><string.h></span> +<span class="preprocessor">#include</span> <span class="include"><time.h></span> +<span class="preprocessor">#include</span> <span class="include"><unistd.h></span> + +<span class="preprocessor">#include</span> <span class="include"><nng/nng.h></span> +<span class="preprocessor">#include</span> <span class="include"><nng/protocol/survey0/survey.h></span> +<span class="preprocessor">#include</span> <span class="include"><nng/protocol/survey0/respond.h></span> + +<span class="preprocessor">#define</span> SERVER <span class="string"><span class="delimiter">"</span><span class="content">server</span><span class="delimiter">"</span></span> +<span class="preprocessor">#define</span> CLIENT <span class="string"><span class="delimiter">"</span><span class="content">client</span><span class="delimiter">"</span></span> +<span class="preprocessor">#define</span> DATE <span class="string"><span class="delimiter">"</span><span class="content">DATE</span><span class="delimiter">"</span></span> + +<span class="directive">void</span> +fatal(<span class="directive">const</span> <span class="predefined-type">char</span> *func, <span class="predefined-type">int</span> rv) +{ + fprintf(stderr, <span class="string"><span class="delimiter">"</span><span class="content">%s: %s</span><span class="char">\n</span><span class="delimiter">"</span></span>, func, nng_strerror(rv)); + exit(<span class="integer">1</span>); +} + +<span class="predefined-type">char</span> * +date(<span class="directive">void</span>) +{ + time_t now = time(&now); + <span class="keyword">struct</span> tm *info = localtime(&now); + <span class="predefined-type">char</span> *text = asctime(info); + text[strlen(text)-<span class="integer">1</span>] = <span class="char">'\0'</span>; <span class="comment">// remove '\n'</span> + <span class="keyword">return</span> (text); +} + +<span class="predefined-type">int</span> +server(<span class="directive">const</span> <span class="predefined-type">char</span> *url) +{ + nng_socket sock; + <span class="predefined-type">int</span> rv; + + <span class="keyword">if</span> ((rv = nng_surveyor0_open(&sock)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_surveyor0_open</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">if</span> ((rv = nng_listen(sock, url, <span class="predefined-constant">NULL</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_listen</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">for</span> (;;) { + printf(<span class="string"><span class="delimiter">"</span><span class="content">SERVER: SENDING DATE SURVEY REQUEST</span><span class="char">\n</span><span class="delimiter">"</span></span>); + <span class="keyword">if</span> ((rv = nng_send(sock, DATE, strlen(DATE) + <span class="integer">1</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_send</span><span class="delimiter">"</span></span>, rv); + } + + <span class="keyword">for</span> (;;) { + <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>; + size_t sz; + rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC); + <span class="keyword">if</span> (rv == NNG_ETIMEDOUT) { + <span class="keyword">break</span>; + } + <span class="keyword">if</span> (rv != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_recv</span><span class="delimiter">"</span></span>, rv); + } + printf(<span class="string"><span class="delimiter">"</span><span class="content">SERVER: RECEIVED </span><span class="char">\"</span><span class="content">%s</span><span class="char">\"</span><span class="content"> SURVEY RESPONSE</span><span class="char">\n</span><span class="delimiter">"</span></span>, + buf); <i class="conum" data-value="1"></i><b>(1)</b> + nng_free(buf, sz); + } + + printf(<span class="string"><span class="delimiter">"</span><span class="content">SERVER: SURVEY COMPLETE</span><span class="char">\n</span><span class="delimiter">"</span></span>); + } +} + +<span class="predefined-type">int</span> +client(<span class="directive">const</span> <span class="predefined-type">char</span> *url, <span class="directive">const</span> <span class="predefined-type">char</span> *name) +{ + nng_socket sock; + <span class="predefined-type">int</span> rv; + + <span class="keyword">if</span> ((rv = nng_respondent0_open(&sock)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_respondent0_open</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">if</span> ((rv = nng_dial(sock, url, <span class="predefined-constant">NULL</span>, NNG_FLAG_NONBLOCK)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_dial</span><span class="delimiter">"</span></span>, rv); + } + <span class="keyword">for</span> (;;) { + <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>; + size_t sz; + <span class="keyword">if</span> ((rv = nng_recv(sock, &buf, &sz, NNG_FLAG_ALLOC)) == <span class="integer">0</span>) { + printf(<span class="string"><span class="delimiter">"</span><span class="content">CLIENT (%s): RECEIVED </span><span class="char">\"</span><span class="content">%s</span><span class="char">\"</span><span class="content"> SURVEY REQUEST</span><span class="char">\n</span><span class="delimiter">"</span></span>, + name, buf); <i class="conum" data-value="1"></i><b>(1)</b> + nng_free(buf, sz); + <span class="predefined-type">char</span> *d = date(); + printf(<span class="string"><span class="delimiter">"</span><span class="content">CLIENT (%s): SENDING DATE SURVEY RESPONSE</span><span class="char">\n</span><span class="delimiter">"</span></span>, + name); + <span class="keyword">if</span> ((rv = nng_send(sock, d, strlen(d) + <span class="integer">1</span>, <span class="integer">0</span>)) != <span class="integer">0</span>) { + fatal(<span class="string"><span class="delimiter">"</span><span class="content">nng_send</span><span class="delimiter">"</span></span>, rv); + } + } + } +} + +<span class="predefined-type">int</span> +main(<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv) +{ + <span class="keyword">if</span> ((argc >= <span class="integer">2</span>) && (strcmp(SERVER, argv[<span class="integer">1</span>]) == <span class="integer">0</span>)) + <span class="keyword">return</span> (server(argv[<span class="integer">2</span>])); + + <span class="keyword">if</span> ((argc >= <span class="integer">3</span>) && (strcmp(CLIENT, argv[<span class="integer">1</span>]) == <span class="integer">0</span>)) + <span class="keyword">return</span> (client(argv[<span class="integer">2</span>], argv[<span class="integer">3</span>])); + + fprintf(stderr, <span class="string"><span class="delimiter">"</span><span class="content">Usage: survey %s|%s <URL> <ARG> ...</span><span class="char">\n</span><span class="delimiter">"</span></span>, + SERVER, CLIENT); + <span class="keyword">return</span> <span class="integer">1</span>; +}</code></pre> +</div> +</div> +<div class="colist arabic"> +<table> +<tr> +<td><i class="conum" data-value="1"></i><b>1</b></td> +<td>Blithely assumes message is ASCIIZ string. Real code should check it.</td> +</tr> +</table> +</div> +<div class="listingblock"> +<div class="title">Compilation</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">gcc survey.c -lnng -o survey</code></pre> +</div> +</div> +<div class="listingblock"> +<div class="title">Execution</div> +<div class="content"> +<pre class="CodeRay highlight"><code data-lang="bash">./survey server ipc:///tmp/survey.ipc & server=$! +./survey client ipc:///tmp/survey.ipc client0 & client0=$! +./survey client ipc:///tmp/survey.ipc client1 & client1=$! +./survey client ipc:///tmp/survey.ipc client2 & client2=$! +sleep 3 <i class="conum" data-value="1"></i><b>(1)</b> +kill $server $client0 $client1 $client2</code></pre> +</div> +</div> +<div class="colist arabic"> +<table> +<tr> +<td><i class="conum" data-value="1"></i><b>1</b></td> +<td>The first survey times out with no responses because the clients aren’t connected yet.</td> +</tr> +</table> +</div> +<div class="listingblock"> +<div class="title">Output</div> +<div class="content"> +<pre>SERVER: SENDING DATE SURVEY REQUEST +SERVER: SURVEY COMPLETE +SERVER: SENDING DATE SURVEY REQUEST +CLIENT (client2): RECEIVED "DATE" SURVEY REQUEST +CLIENT (client0): RECEIVED "DATE" SURVEY REQUEST +CLIENT (client1): RECEIVED "DATE" SURVEY REQUEST +CLIENT (client2): SENDING DATE SURVEY RESPONSE +CLIENT (client1): SENDING DATE SURVEY RESPONSE +CLIENT (client0): SENDING DATE SURVEY RESPONSE +SERVER: RECEIVED "Tue Jan 9 11:33:40 2018" SURVEY RESPONSE +SERVER: RECEIVED "Tue Jan 9 11:33:40 2018" SURVEY RESPONSE +SERVER: RECEIVED "Tue Jan 9 11:33:40 2018" SURVEY RESPONSE +SERVER: SURVEY COMPLETE +SERVER: SENDING DATE SURVEY REQUEST +CLIENT (client2): RECEIVED "DATE" SURVEY REQUEST +CLIENT (client2): SENDING DATE SURVEY RESPONSE +CLIENT (client0): RECEIVED "DATE" SURVEY REQUEST +CLIENT (client0): SENDING DATE SURVEY RESPONSE +CLIENT (client1): RECEIVED "DATE" SURVEY REQUEST +CLIENT (client1): SENDING DATE SURVEY RESPONSE +SERVER: RECEIVED "Tue Jan 9 11:33:41 2018" SURVEY RESPONSE +SERVER: RECEIVED "Tue Jan 9 11:33:41 2018" SURVEY RESPONSE +SERVER: RECEIVED "Tue Jan 9 11:33:41 2018" SURVEY RESPONSE</pre> +</div> +</div> +</div> +</div> +</div> +<div id="footer"> +<div id="footer-text"> +Last updated 2018-01-09 19:43:25 UTC +</div> +</div> +</body> +</html>
diff --git a/gettingstarted/pair.html b/gettingstarted/pair.html index ef1809b..36cf4b1 100644 --- a/gettingstarted/pair.html +++ b/gettingstarted/pair.html
@@ -542,6 +542,19 @@ </tr> </table> </div> +<div class="admonitionblock tip"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-tip" title="Tip"></i> +</td> +<td class="content"> +If you want to use the experimental <a href="https://github.com/nanomsg/nng">nng</a> +library instead, see the document <a href="nng/index.html">Getting Started with 'nng'</a>. +</td> +</tr> +</table> +</div> </div> </div> <div class="sect1"> @@ -680,10 +693,11 @@ <div class="listingblock"> <div class="title">Output</div> <div class="content"> -<pre>NODE1: SENDING DATE REQUEST DATE -NODE0: RECEIVED DATE REQUEST -NODE0: SENDING DATE Sat Sep 7 17:39:01 2013 -NODE1: RECEIVED DATE Sat Sep 7 17:39:01 2013</pre> +<pre>node0: SENDING "node0" +node1: SENDING "node1" +node1: RECEIVED"node0" +node0: SENDING "node0" +node0: RECEIVED"node1"</pre> </div> </div> </div> @@ -691,7 +705,7 @@ </div> <div id="footer"> <div id="footer-text"> -Last updated 2018-01-09 01:08:26 UTC +Last updated 2018-01-09 14:16:57 UTC </div> </div> </body>
diff --git a/gettingstarted/pipeline.html b/gettingstarted/pipeline.html index 22133a8..f4b7175 100644 --- a/gettingstarted/pipeline.html +++ b/gettingstarted/pipeline.html
@@ -542,6 +542,19 @@ </tr> </table> </div> +<div class="admonitionblock tip"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-tip" title="Tip"></i> +</td> +<td class="content"> +If you want to use the experimental <a href="https://github.com/nanomsg/nng">nng</a> +library instead, see the document <a href="nng/index.html">Getting Started with 'nng'</a>. +</td> +</tr> +</table> +</div> </div> </div> <div class="sect1">
diff --git a/gettingstarted/pubsub.html b/gettingstarted/pubsub.html index 365c76a..3503d2b 100644 --- a/gettingstarted/pubsub.html +++ b/gettingstarted/pubsub.html
@@ -542,6 +542,19 @@ </tr> </table> </div> +<div class="admonitionblock tip"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-tip" title="Tip"></i> +</td> +<td class="content"> +If you want to use the experimental <a href="https://github.com/nanomsg/nng">nng</a> +library instead, see the document <a href="nng/index.html">Getting Started with 'nng'</a>. +</td> +</tr> +</table> +</div> </div> </div> <div class="sect1"> @@ -663,7 +676,7 @@ <div class="listingblock"> <div class="title">Compilation</div> <div class="content"> -<pre class="CodeRay highlight"><code data-lang="bash">gcc pubsub.c /usr/local/lib/libnanomsg.a -o pubsub</code></pre> +<pre class="CodeRay highlight"><code data-lang="bash">gcc pubsub.c -lnanomsg -o pubsub</code></pre> </div> </div> <div class="listingblock"> @@ -705,7 +718,7 @@ </div> <div id="footer"> <div id="footer-text"> -Last updated 2018-01-09 01:08:26 UTC +Last updated 2018-01-09 14:17:22 UTC </div> </div> </body>
diff --git a/gettingstarted/reqrep.html b/gettingstarted/reqrep.html index 0d4d489..0edbe21 100644 --- a/gettingstarted/reqrep.html +++ b/gettingstarted/reqrep.html
@@ -542,6 +542,19 @@ </tr> </table> </div> +<div class="admonitionblock tip"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-tip" title="Tip"></i> +</td> +<td class="content"> +If you want to use the experimental <a href="https://github.com/nanomsg/nng">nng</a> +library instead, see the document <a href="nng/index.html">Getting Started with 'nng'</a>. +</td> +</tr> +</table> +</div> </div> </div> <div class="sect1">
diff --git a/gettingstarted/survey.html b/gettingstarted/survey.html index 7b62e04..f6fe192 100644 --- a/gettingstarted/survey.html +++ b/gettingstarted/survey.html
@@ -542,6 +542,19 @@ </tr> </table> </div> +<div class="admonitionblock tip"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-tip" title="Tip"></i> +</td> +<td class="content"> +If you want to use the experimental <a href="https://github.com/nanomsg/nng">nng</a> +library instead, see the document <a href="nng/index.html">Getting Started with 'nng'</a>. +</td> +</tr> +</table> +</div> </div> </div> <div class="sect1"> @@ -682,7 +695,7 @@ <div class="listingblock"> <div class="title">Compilation</div> <div class="content"> -<pre class="CodeRay highlight"><code data-lang="bash">gcc survey.c -lnanmosg -o survey</code></pre> +<pre class="CodeRay highlight"><code data-lang="bash">gcc survey.c -lnanomosg -o survey</code></pre> </div> </div> <div class="listingblock"> @@ -727,7 +740,7 @@ </div> <div id="footer"> <div id="footer-text"> -Last updated 2018-01-09 01:08:26 UTC +Last updated 2018-01-09 19:41:41 UTC </div> </div> </body>