New example: amqp_rpc_sendstring_client. The client sends a plain text message to a queue and expects to receive a reply to a private reply_to queue.

2 files changed, 231 insertions, 0 deletions

diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 3194e13..9aae0ae 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -15,6 +15,9 @@ set(COMMON_SRCS
 add_executable(amqp_sendstring amqp_sendstring.c ${COMMON_SRCS})
 target_link_libraries(amqp_sendstring rabbitmq)
 
+add_executable(amqp_rpc_sendstring_client amqp_rpc_sendstring_client.c ${COMMON_SRCS})
+target_link_libraries(amqp_rpc_sendstring_client rabbitmq)
+
 add_executable(amqp_exchange_declare amqp_exchange_declare.c ${COMMON_SRCS})
 target_link_libraries(amqp_exchange_declare rabbitmq)
 
diff --git a/examples/amqp_rpc_sendstring_client.c b/examples/amqp_rpc_sendstring_client.c
new file mode 100755
index 0000000..b2dcde6
--- /dev/null
+++ b/examples/amqp_rpc_sendstring_client.c
@@ -0,0 +1,228 @@
+/*
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MIT
+ *
+ * Portions created by VMware are Copyright (c) 2007-2012 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Portions created by Tony Garnock-Jones are Copyright (c) 2009-2010
+ * VMware, Inc. and Tony Garnock-Jones. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ * ***** END LICENSE BLOCK *****
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <stdint.h>
+#include <amqp.h>
+#include <amqp_framing.h>
+
+#include <assert.h>
+
+#include "utils.h"
+
+int main(int argc, char* argv[]) {
+  char const *hostname;
+  int port;
+  char const *exchange;
+  char const *routingkey;
+  char const *messagebody;
+
+  int sockfd;
+  amqp_connection_state_t conn;
+  amqp_bytes_t reply_to_queue;
+
+  if (argc < 6) { /* minimum number of mandatory arguments */
+    fprintf(stderr, "usage:\namqp_rpc_sendstring_client host port exchange routingkey messagebody\n");
+    return 1;
+  }
+
+  hostname = argv[1];
+  port = atoi(argv[2]);
+  exchange = argv[3];
+  routingkey = argv[4];
+  messagebody = argv[5];
+
+  /*
+     establish a channel that is used to connect RabbitMQ server
+  */
+
+  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, "/", 0, 131072, 0, AMQP_SASL_METHOD_PLAIN, "guest", "guest"),
+                    "Logging in");
+  amqp_channel_open(conn, 1);
+  die_on_amqp_error(amqp_get_rpc_reply(conn), "Opening channel");
+
+  /*
+     create private reply_to queue
+  */
+
+  {
+    amqp_queue_declare_ok_t *r = amqp_queue_declare(conn, 1, amqp_empty_bytes, 0, 0, 0, 1, amqp_empty_table);
+    die_on_amqp_error(amqp_get_rpc_reply(conn), "Declaring queue");
+    reply_to_queue = amqp_bytes_malloc_dup(r->queue);
+    if (reply_to_queue.bytes == NULL) {
+      fprintf(stderr, "Out of memory while copying queue name");
+      return 1;
+    }
+  }
+
+  /*
+     send the message
+  */
+
+  {
+    /*
+      set properties
+    */
+    amqp_basic_properties_t props;
+    props._flags = AMQP_BASIC_CONTENT_TYPE_FLAG |
+                   AMQP_BASIC_DELIVERY_MODE_FLAG |
+                   AMQP_BASIC_REPLY_TO_FLAG |
+                   AMQP_BASIC_CORRELATION_ID_FLAG;
+    props.content_type = amqp_cstring_bytes("text/plain");
+    props.delivery_mode = 2; /* persistent delivery mode */
+    props.reply_to = amqp_bytes_malloc_dup(reply_to_queue);
+    if (props.reply_to.bytes == NULL) {
+      fprintf(stderr, "Out of memory while copying queue name");
+      return 1;
+    }
+    props.correlation_id = amqp_cstring_bytes("1");
+
+    /*
+      publish
+    */
+    die_on_error(amqp_basic_publish(conn,
+                                    1,
+                                    amqp_cstring_bytes(exchange),
+                                    amqp_cstring_bytes(routingkey),
+                                    0,
+                                    0,
+                                    &props,
+                                    amqp_cstring_bytes(messagebody)),
+                 "Publishing");
+
+    amqp_bytes_free(props.reply_to);
+  }
+
+  /*
+    wait an answer
+  */
+
+  {
+    amqp_basic_consume(conn, 1, reply_to_queue, amqp_empty_bytes, 0, 1, 0, amqp_empty_table);
+    die_on_amqp_error(amqp_get_rpc_reply(conn), "Consuming");
+    amqp_bytes_free(reply_to_queue);
+
+    {
+      amqp_frame_t frame;
+      int result;
+
+      amqp_basic_deliver_t *d;
+      amqp_basic_properties_t *p;
+      size_t body_target;
+      size_t body_received;
+
+      while (1) {
+        amqp_maybe_release_buffers(conn);
+        result = amqp_simple_wait_frame(conn, &frame);
+        printf("Result: %d\n", result);
+        if (result < 0)
+          break;
+
+        printf("Frame type: %d channel: %d\n", frame.frame_type, frame.channel);
+        if (frame.frame_type != AMQP_FRAME_METHOD)
+          continue;
+
+        printf("Method: %s\n", amqp_method_name(frame.payload.method.id));
+        if (frame.payload.method.id != AMQP_BASIC_DELIVER_METHOD)
+          continue;
+
+        d = (amqp_basic_deliver_t *) frame.payload.method.decoded;
+        printf("Delivery: %u exchange: %.*s routingkey: %.*s\n",
+               (unsigned) d->delivery_tag,
+               (int) d->exchange.len, (char *) d->exchange.bytes,
+               (int) d->routing_key.len, (char *) d->routing_key.bytes);
+
+        result = amqp_simple_wait_frame(conn, &frame);
+        if (result < 0)
+          break;
+
+        if (frame.frame_type != AMQP_FRAME_HEADER) {
+          fprintf(stderr, "Expected header!");
+          abort();
+        }
+        p = (amqp_basic_properties_t *) frame.payload.properties.decoded;
+        if (p->_flags & AMQP_BASIC_CONTENT_TYPE_FLAG) {
+          printf("Content-type: %.*s\n",
+                 (int) p->content_type.len, (char *) p->content_type.bytes);
+        }
+        printf("----\n");
+
+        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)
+            break;
+
+          if (frame.frame_type != AMQP_FRAME_BODY) {
+            fprintf(stderr, "Expected body!");
+            abort();
+          }
+
+          body_received += frame.payload.body_fragment.len;
+          assert(body_received <= body_target);
+
+          amqp_dump(frame.payload.body_fragment.bytes,
+                    frame.payload.body_fragment.len);
+        }
+
+        if (body_received != body_target) {
+          /* Can only happen when amqp_simple_wait_frame returns <= 0 */
+          /* We break here to close the connection */
+          break;
+        }
+
+        /* everything was fine, we can quit now because we received the reply */
+        break;
+      }
+
+    }
+  }
+
+  /*
+     closing
+  */
+
+  die_on_amqp_error(amqp_channel_close(conn, 1, AMQP_REPLY_SUCCESS), "Closing channel");
+  die_on_amqp_error(amqp_connection_close(conn, AMQP_REPLY_SUCCESS), "Closing connection");
+  die_on_error(amqp_destroy_connection(conn), "Ending connection");
+
+  return 0;
+}