Creating a branch for experimenting with some ideas for JMS client.rajith_jms_client

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/rajith_jms_client@1128369 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 173 insertions, 0 deletions

diff --git a/qpid/cpp/examples/old_api/pub-sub/topic_listener.cpp b/qpid/cpp/examples/old_api/pub-sub/topic_listener.cpp
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+/*
+ *
+ * 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_listener.cpp:
+ *
+ *  This program is one of two programs designed to be used
+ *  together. These programs implement a publish-subscribe example
+ *  using the "amq.topic" exchange.
+ *
+ *   topic_publisher.cpp 
+ *
+ *      Sends messages to the "amq.topic" exchange, using the
+ *      multipart routing keys "usa.news", "usa.weather",
+ *      "europe.news", and "europe.weather".
+ *
+ *   topic_listener.cpp (this program)
+ *
+ *      Creates private queues for "news", "weather", "usa", and
+ *      "europe", binding them to the amq.topic exchange using
+ *      bindings that match the corresponding parts of the multipart
+ *      routing keys.
+ *
+ *      Multiple listeners can be run at the same time.
+ *
+ */
+
+#include <qpid/client/Connection.h>
+#include <qpid/client/Session.h>
+#include <qpid/client/Message.h>
+#include <qpid/client/MessageListener.h>
+#include <qpid/client/SubscriptionManager.h>
+
+#include <cstdlib>
+#include <iostream>
+
+using namespace qpid::client;
+using namespace qpid::framing;
+
+
+class Listener : public MessageListener {
+  private:
+    Session& session;
+    SubscriptionManager subscriptions;
+  public:
+    Listener(Session& session);
+    virtual void prepareQueue(std::string queue, std::string exchange, std::string routing_key);
+    virtual void received(Message& message);
+    virtual void listen();
+    ~Listener() { };
+};
+
+
+/*
+ *  Listener::Listener
+ *
+ *  Subscribe to the queue, route it to a client destination for the
+ *  listener. (The destination name merely identifies the destination
+ *  in the listener, you can use any name as long as you use the same
+ *  name for the listener).
+ */
+
+Listener::Listener(Session& session) : 
+        session(session),
+        subscriptions(session)
+{
+}
+
+
+void Listener::prepareQueue(std::string queue, std::string exchange, std::string routing_key) {
+
+    /* Create a unique queue name for this consumer by concatenating
+     * the queue name parameter with the Session ID.
+     */
+
+    queue += session.getId().getName();
+    std::cout << "Declaring queue: " << queue <<  std::endl;
+   
+    /* Declare an exclusive queue on the broker
+     */
+
+    session.queueDeclare(arg::queue=queue, arg::exclusive=true, arg::autoDelete=true);
+
+    /* Route messages to the new queue if they match the routing key.
+     *
+     * Also route any messages to with the "control" routing key to
+     * this queue so we know when it's time to stop. A publisher sends
+     * a message with the content "That's all, Folks!", using the
+     * "control" routing key, when it is finished.
+     */
+
+    session.exchangeBind(arg::exchange=exchange, arg::queue=queue, arg::bindingKey=routing_key);
+    session.exchangeBind(arg::exchange=exchange, arg::queue=queue, arg::bindingKey="control");
+
+    /*
+     * subscribe to the queue using the subscription manager.
+     */
+
+    std::cout << "Subscribing to queue " << queue << std::endl;
+    subscriptions.subscribe(*this, queue);
+}
+
+void Listener::received(Message& message) {
+    std::cout << "Message: " << message.getData() << " from " << message.getDestination() << std::endl;
+
+    if (message.getData() == "That's all, folks!") {
+        std::cout << "Shutting down listener for " << message.getDestination() << std::endl;
+        subscriptions.cancel(message.getDestination());
+    }
+}
+
+void Listener::listen() {
+    // Receive messages
+    subscriptions.run();
+}
+
+int main(int argc, char** argv) {
+    const char* host = argc>1 ? argv[1] : "127.0.0.1";
+    int port = argc>2 ? atoi(argv[2]) : 5672;
+    std::string exchange = argc>3 ? argv[3] : "amq.topic";
+    Connection connection;
+    try {
+        connection.open(host, port);
+        Session session =  connection.newSession();
+
+        //--------- Main body of program --------------------------------------------
+
+	// Create a listener for the session
+
+        Listener listener(session);
+
+        // Subscribe to messages on the queues we are interested in
+
+        listener.prepareQueue("usa", exchange, "usa.#");
+        listener.prepareQueue("europe", exchange, "europe.#");
+        listener.prepareQueue("news", exchange, "#.news");
+        listener.prepareQueue("weather", exchange, "#.weather");
+
+        std::cout << "Listening for messages ..." << std::endl;
+
+        // Give up control and receive messages
+        listener.listen();
+
+
+        //-----------------------------------------------------------------------------
+
+        connection.close();
+        return 0;
+    } catch(const std::exception& error) {
+        std::cout << error.what() << std::endl;
+    }
+    return 1;   
+}
+
+