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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.
+ *
+ */
+
+
+/**
+ * server.cpp
+ *
+ * This program is one of two programs that illustrate the
+ * request/response pattern.
+ *
+ *
+ * client.cpp
+ *
+ * A client application that sends messages to the "amq.direct"
+ * exchange, using the routing key "request" to route messages to
+ * the server.
+ *
+ * Each instance of the client creates its own private response
+ * queue, binding it to the "amq.direct" exchange using it's
+ * session identifier as the routing key, and places its session
+ * identifier in the "reply-to" property of each message it sends.
+ *
+ *
+ * server.cpp (this program)
+ *
+ * A service that accepts messages from a request queue, converts
+ * their content to upper case, and sends the result to the
+ * original sender.
+ *
+ * This program creates a request queue, binds it to "amq.direct"
+ * using the routing key "request", then receives messages from
+ * the request queue. Each incoming message is converted to upper
+ * case, then sent to the "amq.direct" exchange using the
+ * request's reply-to property as the routing key for the
+ * response.
+ *
+ *
+ */
+
+
+#include <qpid/client/Connection.h>
+#include <qpid/client/Session.h>
+
+#include <qpid/client/AsyncSession.h>
+#include <qpid/client/Message.h>
+#include <qpid/client/MessageListener.h>
+#include <qpid/client/SubscriptionManager.h>
+
+#include <cstdlib>
+#include <iostream>
+
+#include <sstream>
+#include <string>
+
+using namespace qpid::client;
+using namespace qpid::framing;
+using std::stringstream;
+using std::string;
+
+class Listener : public MessageListener{
+ private:
+ SubscriptionManager& subscriptions;
+ AsyncSession asyncSession;
+ public:
+ Listener(SubscriptionManager& subscriptions, Session& session);
+ virtual void received(Message& message);
+};
+
+Listener::Listener(SubscriptionManager& subs, Session& session)
+ : subscriptions(subs), asyncSession(session)
+{}
+
+void Listener::received(Message& request) {
+ Message response;
+
+ // Get routing key for response from the request's replyTo property
+ string routingKey;
+
+ if (request.getMessageProperties().hasReplyTo()) {
+ routingKey = request.getMessageProperties().getReplyTo().getRoutingKey();
+ } else {
+ std::cout << "Error: " << "No routing key for request (" << request.getData() << ")" << std::endl;
+ return;
+ }
+
+ std::cout << "Request: " << request.getData() << " (" <<routingKey << ")" << std::endl;
+
+ // Transform message content to upper case
+ std::string s = request.getData();
+ std::transform (s.begin(), s.end(), s.begin(), toupper);
+ response.setData(s);
+
+ // Send it back to the user
+ response.getDeliveryProperties().setRoutingKey(routingKey);
+
+ // Asynchronous transfer sends messages as quickly as
+ // possible without waiting for confirmation.
+ asyncSession.messageTransfer(arg::content=response, arg::destination="amq.direct");
+}
+
+
+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 --------------------------------------------
+
+
+ // Create a request queue for clients to use when making
+ // requests.
+ string request_queue = "request";
+
+ // Use the name of the request queue as the routing key
+ session.queueDeclare(arg::queue=request_queue);
+ session.exchangeBind(arg::exchange="amq.direct", arg::queue=request_queue, arg::bindingKey=request_queue);
+
+ // Create a listener and subscribe it to the request_queue
+ std::cout << "Activating request queue listener for: " << request_queue << std::endl;
+ SubscriptionManager subscriptions(session);
+ Listener listener(subscriptions, session);
+ subscriptions.subscribe(listener, request_queue);
+ // Deliver messages until the subscription is cancelled
+ // by Listener::received()
+
+ std::cout << "Waiting for requests" << std::endl;
+ subscriptions.run();
+
+ //-----------------------------------------------------------------------------
+
+ connection.close();
+ return 0;
+ } catch(const std::exception& error) {
+ std::cout << error.what() << std::endl;
+ }
+ return 1;
+}
+
+