QPID-676: Jonathan Robie's C++ examples.

Made the following alterations for recent C++ API changes:
 - use arg:: namespace for Session keyword arguments.
 - removed trailing _ on session method names.

cpp/examples/Makefile.am calls make in each example directory with
flags to build examples from headers/libraries SVN checkout.

Examples themselves have a plain Makefile (not automake) which will
work as is if qpid is installed in standard places.


git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk@593402 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 123 insertions, 0 deletions

diff --git a/qpid/cpp/examples/pub-sub/topic_publisher.cpp b/qpid/cpp/examples/pub-sub/topic_publisher.cpp
new file mode 100644
index 0000000000..52c2827e58
--- /dev/null
+++ b/qpid/cpp/examples/pub-sub/topic_publisher.cpp
@@ -0,0 +1,123 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+
+
+/**
+ *  topic_publisher.cpp:
+ *
+ *  This program is one of three programs designed to be used
+ *  together. These programs use the topic exchange.
+ *  
+ *    topic_config_queues.cpp:
+ *
+ *      Creates a queue on a broker, binding a routing key to route
+ *      messages to that queue.
+ *
+ *    topic_publisher.cpp (this program):
+ *
+ *      Publishes to a broker, specifying a routing key.
+ *
+ *    topic_listener.cpp
+ *
+ *      Reads from a queue on the broker using a message listener.
+ *
+ */
+
+
+#include <qpid/client/Connection.h>
+#include <qpid/client/Session.h>
+#include <qpid/client/Message.h>
+
+
+#include <unistd.h>
+#include <cstdlib>
+#include <iostream>
+
+#include <sstream>
+
+using namespace qpid::client;
+using namespace qpid::framing;
+
+using std::stringstream;
+using std::string;
+
+void publish_messages(Session& session, string routing_key)
+{
+  Message message;
+
+  // Set the routing key once, we'll use the same routing key for all
+  // messages.
+
+  message.getDeliveryProperties().setRoutingKey(routing_key); 
+  for (int i=0; i<5; i++) {
+    stringstream message_data;
+    message_data << "Message " << i;
+
+    message.setData(message_data.str());
+    session.messageTransfer(arg::content=message, arg::destination="amq.topic");
+  }
+
+}
+
+/*
+ * no_more_messages()
+ * 
+ * Send a message to indicate that no more messages are coming.
+ * Use the 'control' routing key (see comments in topic_config_queues.cpp).
+ *
+ */
+
+void no_more_messages(Session& session)
+{
+  Message message;
+
+  message.getDeliveryProperties().setRoutingKey("control"); 
+  message.setData("That's all, folks!");
+  session.messageTransfer(arg::content=message, arg::destination="amq.topic"); 
+}
+
+int main() {
+    Connection connection;
+    Message message;
+    try {
+        connection.open("127.0.0.1", 5672 );
+        Session session =  connection.newSession();
+
+  //--------- Main body of program --------------------------------------------
+
+	publish_messages(session, "usa.news");
+	publish_messages(session, "usa.weather");
+	publish_messages(session, "europe.news");
+	publish_messages(session, "europe.weather");
+
+	no_more_messages(session);
+
+  //-----------------------------------------------------------------------------
+
+        connection.close();
+        return 0;
+    } catch(const std::exception& error) {
+        std::cout << error.what() << std::endl;
+    }
+    return 1;
+}
+
+