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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.
+ *
+ */
+
+
+/**
+ *
+ * listener.cpp
+ *
+ * This is one of three programs used to implement XML-based content
+ * routing in C++.
+ *
+ * declare_queues.cpp
+ *
+ * Creates a queue named "message_qaueue" on the broker,
+ * declares an XML Exchange, subscribes the queue to the XML
+ * Exchange using an XQuery in the binding, then exits.
+ *
+ * xml_producer.cpp
+ *
+ * Publishes messages to the XML Exchange.
+ *
+ * listener.cpp (this program)
+ *
+ * Reads messages from the "message_queue" queue.
+ */
+
+
+#include <qpid/client/Connection.h>
+#include <qpid/client/Session.h>
+#include <qpid/client/Message.h>
+#include <qpid/client/SubscriptionManager.h>
+
+#include <cstdlib>
+#include <iostream>
+
+using namespace qpid::client;
+using namespace qpid::framing;
+
+
+class Listener : public MessageListener{
+ private:
+ SubscriptionManager& subscriptions;
+ public:
+ Listener(SubscriptionManager& subscriptions);
+ virtual void received(Message& message);
+};
+
+Listener::Listener(SubscriptionManager& subs) : subscriptions(subs)
+{}
+
+void Listener::received(Message& message) {
+ std::cout << "Message: " << message.getData() << std::endl;
+ if (message.getHeaders().getAsString("control") == "end") {
+ std::cout << "Shutting down listener for " << message.getDestination()
+ << std::endl;
+ subscriptions.cancel(message.getDestination());
+ }
+}
+
+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;
+
+ Connection connection;
+ try {
+ connection.open(host, port);
+ Session session = connection.newSession();
+
+ //--------- Main body of program --------------------------------------------
+
+ SubscriptionManager subscriptions(session);
+ // Create a listener and subscribe it to the queue named "message_queue"
+ Listener listener(subscriptions);
+ subscriptions.subscribe(listener, "message_queue");
+ // Receive messages until the subscription is cancelled
+ // by Listener::received()
+ subscriptions.run();
+
+ //---------------------------------------------------------------------------
+
+ connection.close();
+ return 0;
+ } catch(const std::exception& error) {
+ std::cout << error.what() << std::endl;
+ }
+ return 1;
+}
+
+