| /* |
| * |
| * 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 is one of two programs designed to be used |
| * together. |
| * |
| * fanout_producer.cpp |
| * |
| * Publishes messages to the "amq.fanout" exchange. |
| * |
| * listener.cpp (this program) |
| * |
| * Creates a private queue, binds it to the "amq.fanout" |
| * exchange, and reads messages from its queue as they |
| * arrive. Messages sent before the listener binds the queue are |
| * not received. |
| * |
| * Multiple listeners can 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 <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; |
| 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; |
| } |
| |
| |