Beginning CMake configuration for ZT

Only tested on Windows so far

ext/librabbitmq/examples/amqp_consumer.c

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+/*
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MIT
+ *
+ * Portions created by Alan Antonuk are Copyright (c) 2012-2013
+ * Alan Antonuk. All Rights Reserved.
+ *
+ * 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 <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <amqp.h>
+#include <amqp_tcp_socket.h>
+
+#include <assert.h>
+
+#include "utils.h"
+
+#define SUMMARY_EVERY_US 1000000
+
+static void run(amqp_connection_state_t conn) {
+  uint64_t start_time = now_microseconds();
+  int received = 0;
+  int previous_received = 0;
+  uint64_t previous_report_time = start_time;
+  uint64_t next_summary_time = start_time + SUMMARY_EVERY_US;
+
+  amqp_frame_t frame;
+
+  uint64_t now;
+
+  for (;;) {
+    amqp_rpc_reply_t ret;
+    amqp_envelope_t envelope;
+
+    now = now_microseconds();
+    if (now > next_summary_time) {
+      int countOverInterval = received - previous_received;
+      double intervalRate =
+          countOverInterval / ((now - previous_report_time) / 1000000.0);
+      printf("%d ms: Received %d - %d since last report (%d Hz)\n",
+             (int)(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);
+    ret = amqp_consume_message(conn, &envelope, NULL, 0);
+
+    if (AMQP_RESPONSE_NORMAL != ret.reply_type) {
+      if (AMQP_RESPONSE_LIBRARY_EXCEPTION == ret.reply_type &&
+          AMQP_STATUS_UNEXPECTED_STATE == ret.library_error) {
+        if (AMQP_STATUS_OK != amqp_simple_wait_frame(conn, &frame)) {
+          return;
+        }
+
+        if (AMQP_FRAME_METHOD == frame.frame_type) {
+          switch (frame.payload.method.id) {
+            case AMQP_BASIC_ACK_METHOD:
+              /* if we've turned publisher confirms on, and we've published a
+               * message here is a message being confirmed.
+               */
+              break;
+            case AMQP_BASIC_RETURN_METHOD:
+              /* if a published message couldn't be routed and the mandatory
+               * flag was set this is what would be returned. The message then
+               * needs to be read.
+               */
+              {
+                amqp_message_t message;
+                ret = amqp_read_message(conn, frame.channel, &message, 0);
+                if (AMQP_RESPONSE_NORMAL != ret.reply_type) {
+                  return;
+                }
+
+                amqp_destroy_message(&message);
+              }
+
+              break;
+
+            case AMQP_CHANNEL_CLOSE_METHOD:
+              /* a channel.close method happens when a channel exception occurs,
+               * this can happen by publishing to an exchange that doesn't exist
+               * for example.
+               *
+               * In this case you would need to open another channel redeclare
+               * any queues that were declared auto-delete, and restart any
+               * consumers that were attached to the previous channel.
+               */
+              return;
+
+            case AMQP_CONNECTION_CLOSE_METHOD:
+              /* a connection.close method happens when a connection exception
+               * occurs, this can happen by trying to use a channel that isn't
+               * open for example.
+               *
+               * In this case the whole connection must be restarted.
+               */
+              return;
+
+            default:
+              fprintf(stderr, "An unexpected method was received %u\n",
+                      frame.payload.method.id);
+              return;
+          }
+        }
+      }
+
+    } else {
+      amqp_destroy_envelope(&envelope);
+    }
+
+    received++;
+  }
+}
+
+int main(int argc, char const *const *argv) {
+  char const *hostname;
+  int port, status;
+  char const *exchange;
+  char const *bindingkey;
+  amqp_socket_t *socket = NULL;
+  amqp_connection_state_t conn;
+
+  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 = "amq.direct";   /* argv[3]; */
+  bindingkey = "test queue"; /* argv[4]; */
+
+  conn = amqp_new_connection();
+
+  socket = amqp_tcp_socket_new(conn);
+  if (!socket) {
+    die("creating TCP socket");
+  }
+
+  status = amqp_socket_open(socket, hostname, port);
+  if (status) {
+    die("opening TCP socket");
+  }
+
+  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");
+
+  {
+    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");
+    queuename = amqp_bytes_malloc_dup(r->queue);
+    if (queuename.bytes == NULL) {
+      fprintf(stderr, "Out of memory while copying queue name");
+      return 1;
+    }
+  }
+
+  amqp_queue_bind(conn, 1, queuename, amqp_cstring_bytes(exchange),
+                  amqp_cstring_bytes(bindingkey), amqp_empty_table);
+  die_on_amqp_error(amqp_get_rpc_reply(conn), "Binding queue");
+
+  amqp_basic_consume(conn, 1, queuename, amqp_empty_bytes, 0, 1, 0,
+                     amqp_empty_table);
+  die_on_amqp_error(amqp_get_rpc_reply(conn), "Consuming");
+
+  run(conn);
+
+  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;
+}