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Diffstat (limited to 'trunk/qpid/cpp/examples/fanout/listener.cpp')
-rw-r--r-- | trunk/qpid/cpp/examples/fanout/listener.cpp | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/trunk/qpid/cpp/examples/fanout/listener.cpp b/trunk/qpid/cpp/examples/fanout/listener.cpp new file mode 100644 index 0000000000..b29c82d3d9 --- /dev/null +++ b/trunk/qpid/cpp/examples/fanout/listener.cpp @@ -0,0 +1,107 @@ +/* + * + * 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 program reads messages fro 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 <qpid/client/SubscriptionManager.h> + +#include <unistd.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.getData() == "That's all, folks!") { + 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; + Message msg; + try { + connection.open(host, port); + Session session = connection.newSession(); + + //--------- Main body of program -------------------------------------------- + + // Each client creates its own private queue, using the + // session id to guarantee a unique name. It then routes + // all messages from the fanout exchange to its own queue + // by binding to the queue. + // + // The binding specifies a binding key, but for a fanout + // exchange, the binding key is optional and is not used + // for routing decisions. It can be useful for tracking + // messages and routing in logs. + + std::string myQueue=session.getId().getName(); + session.queueDeclare(arg::queue=myQueue, arg::exclusive=true, + arg::autoDelete=true); + + session.exchangeBind(arg::exchange="amq.fanout", arg::queue=myQueue, arg::bindingKey="my-key"); + + // Create a listener and subscribe it to my queue. + SubscriptionManager subscriptions(session); + Listener listener(subscriptions); + subscriptions.subscribe(listener, myQueue); + + // Receive messages until the subscription is cancelled + // by Listener::received() + std::cout << "Listening" << std::endl; + subscriptions.run(); + + //--------------------------------------------------------------------------- + + connection.close(); + return 0; + } catch(const std::exception& error) { + std::cout << error.what() << std::endl; + } + return 1; +} + + |