Simple producer/consumer examples

5 files changed, 288 insertions, 1 deletions

diff --git a/examples/Makefile.am b/examples/Makefile.am
index 45f0308..dbb7953 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -1,4 +1,4 @@
-bin_PROGRAMS = amqp_sendstring amqp_exchange_declare amqp_listen
+bin_PROGRAMS = amqp_sendstring amqp_exchange_declare amqp_listen amqp_producer amqp_consumer
 
 AM_CFLAGS = -I../librabbitmq
 AM_LDFLAGS = ../librabbitmq/librabbitmq.la
@@ -8,3 +8,5 @@ nodist_INCLUDES = example_utils.h
 amqp_sendstring_SOURCES = amqp_sendstring.c example_utils.c
 amqp_exchange_declare_SOURCES = amqp_exchange_declare.c example_utils.c
 amqp_listen_SOURCES = amqp_listen.c example_utils.c
+amqp_producer_SOURCES = amqp_producer.c example_utils.c
+amqp_consumer_SOURCES = amqp_consumer.c example_utils.c
diff --git a/examples/amqp_consumer.c b/examples/amqp_consumer.c
new file mode 100644
index 0000000..84c3669
--- /dev/null
+++ b/examples/amqp_consumer.c
@@ -0,0 +1,172 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include <stdint.h>
+#include <amqp.h>
+#include <amqp_framing.h>
+
+#include <unistd.h>
+#include <assert.h>
+
+#include "example_utils.h"
+
+#define SUMMARY_EVERY_US 1000000
+
+static void run(amqp_connection_state_t conn)
+{
+  long long start_time = now_microseconds();
+  int received = 0;
+  int previous_received = 0;
+  long long previous_report_time = start_time;
+  long long next_summary_time = start_time + SUMMARY_EVERY_US;
+
+  amqp_frame_t frame;
+  int result;
+  size_t body_received;
+  size_t body_target;
+
+  long long now;
+
+  while (1) {
+    now = now_microseconds();
+    if (now > next_summary_time) {
+      int countOverInterval = received - previous_received;
+      double intervalRate = countOverInterval / ((now - previous_report_time) / 1000000.0);
+      printf("%lld ms: Received %d - %d since last report (%d Hz)\n",
+	     (now - start_time) / 1000, received, countOverInterval, (int) intervalRate);
+
+      previous_received = received;
+      previous_report_time = now;
+      next_summary_time += SUMMARY_EVERY_US;
+    }
+
+    amqp_maybe_release_buffers(conn);
+    result = amqp_simple_wait_frame(conn, &frame);
+    if (result <= 0) return;
+
+    if (frame.frame_type != AMQP_FRAME_METHOD)
+      continue;
+
+    if (frame.payload.method.id != AMQP_BASIC_DELIVER_METHOD)
+      continue;
+
+    result = amqp_simple_wait_frame(conn, &frame);
+    if (result <= 0) return;
+    if (frame.frame_type != AMQP_FRAME_HEADER) {
+      fprintf(stderr, "Expected header!");
+      abort();
+    }
+
+    body_target = frame.payload.properties.body_size;
+    body_received = 0;
+
+    while (body_received < body_target) {
+      result = amqp_simple_wait_frame(conn, &frame);
+      if (result <= 0) return;
+
+      if (frame.frame_type != AMQP_FRAME_BODY) {
+	fprintf(stderr, "Expected body!");
+	abort();
+      }
+
+      body_received += frame.payload.body_fragment.len;
+      assert(body_received <= body_target);
+    }
+
+    received++;
+  }
+}
+
+int main(int argc, char const * const *argv) {
+  char const *hostname;
+  int port;
+  char const *exchange;
+  char const *bindingkey;
+
+  int sockfd;
+  amqp_connection_state_t conn;
+
+  amqp_rpc_reply_t result;
+  amqp_bytes_t queuename;
+
+  if (argc < 3) {
+    fprintf(stderr, "Usage: amqp_consumer host port\n");
+    return 1;
+  }
+
+  hostname = argv[1];
+  port = atoi(argv[2]);
+  exchange = ""; //argv[3];
+  bindingkey = "test queue"; //argv[4];
+
+  conn = amqp_new_connection();
+
+  die_on_error(sockfd = amqp_open_socket(hostname, port), "Opening socket");
+  amqp_set_sockfd(conn, sockfd);
+  die_on_amqp_error(amqp_login(conn, "/", 131072, AMQP_SASL_METHOD_PLAIN, "guest", "guest"),
+		    "Logging in");
+
+  {
+    amqp_queue_declare_t s =
+      (amqp_queue_declare_t) {
+        .ticket = 0,
+	.queue = {.len = 0, .bytes = NULL},
+	.passive = 0,
+	.durable = 0,
+	.exclusive = 0,
+	.auto_delete = 1,
+	.nowait = 0,
+	.arguments = {.num_entries = 0, .entries = NULL}
+      };
+    die_on_amqp_error(result = amqp_simple_rpc(conn, 1, AMQP_QUEUE_DECLARE_METHOD,
+					       AMQP_QUEUE_DECLARE_OK_METHOD, &s),
+		      "Declaring queue");
+    amqp_queue_declare_ok_t *r = (amqp_queue_declare_ok_t *) result.reply.decoded;
+    queuename = amqp_bytes_malloc_dup(r->queue);
+    if (queuename.bytes == NULL) {
+      die_on_error(-ENOMEM, "Copying queue name");
+    }
+  }
+
+  {
+    amqp_queue_bind_t s =
+      (amqp_queue_bind_t) {
+        .ticket = 0,
+	.queue = queuename,
+	.exchange = amqp_cstring_bytes(exchange),
+	.routing_key = amqp_cstring_bytes(bindingkey),
+	.nowait = 0,
+	.arguments = {.num_entries = 0, .entries = NULL}
+      };
+    die_on_amqp_error(result = amqp_simple_rpc(conn, 1, AMQP_QUEUE_BIND_METHOD,
+					       AMQP_QUEUE_BIND_OK_METHOD, &s),
+		      "Binding queue");
+  }
+
+  {
+    amqp_basic_consume_t s =
+      (amqp_basic_consume_t) {
+        .ticket = 0,
+	.queue = queuename,
+	.consumer_tag = {.len = 0, .bytes = NULL},
+	.no_local = 0,
+	.no_ack = 1,
+	.exclusive = 0,
+	.nowait = 0
+      };
+    die_on_amqp_error(result = amqp_simple_rpc(conn, 1, AMQP_BASIC_CONSUME_METHOD,
+					       AMQP_BASIC_CONSUME_OK_METHOD, &s),
+		      "Consuming");
+  }
+
+  run(conn);
+
+  die_on_amqp_error(amqp_channel_close(conn, AMQP_REPLY_SUCCESS), "Closing channel");
+  die_on_amqp_error(amqp_connection_close(conn, AMQP_REPLY_SUCCESS), "Closing connection");
+  amqp_destroy_connection(conn);
+  die_on_error(close(sockfd), "Closing socket");
+
+  return 0;
+}
diff --git a/examples/amqp_producer.c b/examples/amqp_producer.c
new file mode 100644
index 0000000..ef270b1
--- /dev/null
+++ b/examples/amqp_producer.c
@@ -0,0 +1,104 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <stdint.h>
+#include <amqp.h>
+#include <amqp_framing.h>
+
+#include <unistd.h>
+
+#include "example_utils.h"
+
+#define SUMMARY_EVERY_US 1000000
+
+static void send_batch(amqp_connection_state_t conn,
+		       char const *queue_name,
+		       int rate_limit,
+		       int message_count)
+{
+  long long start_time = now_microseconds();
+  int i;
+  int sent = 0;
+  int previous_sent = 0;
+  long long previous_report_time = start_time;
+  long long next_summary_time = start_time + SUMMARY_EVERY_US;
+
+  char message[256];
+
+  for (i = 0; i < sizeof(message); i++) {
+    message[i] = i & 0xff;
+  }
+
+  for (i = 0; i < message_count; i++) {
+    long long now = now_microseconds();
+    die_on_error(amqp_basic_publish(conn,
+				    (amqp_bytes_t) {.len = 0},
+				    amqp_cstring_bytes(queue_name),
+				    0,
+				    0,
+				    NULL,
+				    (amqp_bytes_t) {.len = sizeof(message), .bytes = message}),
+		 "Publishing");
+    sent++;
+    if (now > next_summary_time) {
+      int countOverInterval = sent - previous_sent;
+      double intervalRate = countOverInterval / ((now - previous_report_time) / 1000000.0);
+      printf("%lld ms: Sent %d - %d since last report (%d Hz)\n",
+	     (now - start_time) / 1000, sent, countOverInterval, (int) intervalRate);
+
+      previous_sent = sent;
+      previous_report_time = now;
+      next_summary_time += SUMMARY_EVERY_US;
+    }
+
+    while (((i * 1000000.0) / (now - start_time)) > rate_limit) {
+      usleep(2000);
+      now = now_microseconds();
+    }
+  }
+
+  {
+    long long stop_time = now_microseconds();
+    long long total_delta = stop_time - start_time;
+
+    printf("PRODUCER - Message count: %d\n", message_count);
+    printf("Total time, milliseconds: %lld\n", total_delta / 1000);
+    printf("Overall messages-per-second: %g\n", (message_count / (total_delta / 1000000.0)));
+  }
+}
+
+int main(int argc, char const * const *argv) {
+  char const *hostname;
+  int port;
+  int rate_limit;
+  int message_count;
+
+  int sockfd;
+  amqp_connection_state_t conn;
+
+  if (argc < 5) {
+    fprintf(stderr, "Usage: amqp_producer host port rate_limit message_count\n");
+    return 1;
+  }
+
+  hostname = argv[1];
+  port = atoi(argv[2]);
+  rate_limit = atoi(argv[3]);
+  message_count = atoi(argv[4]);
+
+  conn = amqp_new_connection();
+
+  die_on_error(sockfd = amqp_open_socket(hostname, port), "Opening socket");
+  amqp_set_sockfd(conn, sockfd);
+  die_on_amqp_error(amqp_login(conn, "/", 131072, AMQP_SASL_METHOD_PLAIN, "guest", "guest"),
+		    "Logging in");
+
+  send_batch(conn, "test queue", rate_limit, message_count);
+
+  die_on_amqp_error(amqp_channel_close(conn, AMQP_REPLY_SUCCESS), "Closing channel");
+  die_on_amqp_error(amqp_connection_close(conn, AMQP_REPLY_SUCCESS), "Closing connection");
+  amqp_destroy_connection(conn);
+  die_on_error(close(sockfd), "Closing socket");
+  return 0;
+}
diff --git a/examples/example_utils.c b/examples/example_utils.c
index 7c01074..de6694d 100644
--- a/examples/example_utils.c
+++ b/examples/example_utils.c
@@ -6,6 +6,7 @@
 #include <amqp.h>
 #include <amqp_framing.h>
 
+#include <sys/time.h>
 #include <unistd.h>
 
 void die_on_error(int x, char const *context) {
@@ -55,3 +56,9 @@ void die_on_amqp_error(amqp_rpc_reply_t x, char const *context) {
 
   exit(1);
 }
+
+long long now_microseconds(void) {
+  struct timeval tv;
+  gettimeofday(&tv, NULL);
+  return (long long) tv.tv_sec * 1000000 + (long long) tv.tv_usec;
+}
diff --git a/examples/example_utils.h b/examples/example_utils.h
index eda03e7..72d3b9d 100644
--- a/examples/example_utils.h
+++ b/examples/example_utils.h
@@ -4,4 +4,6 @@
 extern void die_on_error(int x, char const *context);
 extern void die_on_amqp_error(amqp_rpc_reply_t x, char const *context);
 
+extern long long now_microseconds(void);
+
 #endif