QPID-676: Jonathan Robie's C++ examples.

Made the following alterations for recent C++ API changes:
 - use arg:: namespace for Session keyword arguments.
 - removed trailing _ on session method names.

cpp/examples/Makefile.am calls make in each example directory with
flags to build examples from headers/libraries SVN checkout.

Examples themselves have a plain Makefile (not automake) which will
work as is if qpid is installed in standard places.


git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@593402 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 153 insertions, 0 deletions

diff --git a/cpp/examples/request-response/server.cpp b/cpp/examples/request-response/server.cpp
new file mode 100644
index 0000000000..6c82090794
--- /dev/null
+++ b/cpp/examples/request-response/server.cpp
@@ -0,0 +1,153 @@
+/*
+ *
+ * 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 
+ *
+ *      Make requests of a service, print the response.
+ *
+ *    server.cpp (this program)
+ *
+ *      Accept requests, reverse the letters in each message, and
+ *      return it as a response.
+ *
+ */
+
+
+#include <qpid/client/Connection.h>
+#include <qpid/client/Dispatcher.h>
+#include <qpid/client/Session.h>
+#include <qpid/client/Message.h>
+#include <qpid/client/MessageListener.h>
+
+
+#include <unistd.h>
+#include <cstdlib>
+#include <iostream>
+#include <algorithm>
+
+#include <sstream>
+#include <string>
+
+using namespace qpid::client;
+using namespace qpid::framing;
+using std::stringstream;
+using std::string;
+
+class Listener : public MessageListener{
+private:
+  std::string destination_name;
+  Dispatcher dispatcher;
+  Session session;
+public:
+  Listener(Session& session, string destination_name): 
+    destination_name(destination_name),
+    dispatcher(session),
+    session(session)
+  {};
+
+  virtual void listen();
+  virtual void received(Message& message);
+  virtual void wait();
+  ~Listener() { };
+};
+
+
+void Listener::listen() {
+  std::cout << "Activating request queue listener for: " <<destination_name << std::endl;
+
+  session.messageSubscribe(arg::queue=destination_name, arg::destination=destination_name);
+
+  // ##### Should not be needed. Sigh.
+  session.messageFlow(arg::destination=destination_name, arg::unit=0, arg::value=1);//messages ### Define a constant?
+  session.messageFlow(arg::destination=destination_name, arg::unit=1, arg::value=0xFFFFFFFF);//bytes ###### Define a constant?
+
+  dispatcher.listen(destination_name, this);
+}
+
+
+void Listener::wait() {
+  std::cout << "Waiting for requests" << std::endl;
+  dispatcher.run();
+}
+
+
+void Listener::received(Message& request) {
+
+  Message response;
+  string routingKey = request.getHeaders().getString("reply-to");
+
+  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);
+  session.messageTransfer(arg::content=response);
+}
+
+
+int main() {
+  Connection connection;
+    Message message;
+    try {
+        connection.open("127.0.0.1", 5672 );
+        Session session =  connection.newSession();
+
+  //--------- Main body of program --------------------------------------------
+
+	// Create a request queue for clients to use when making
+	// requests.
+
+	string request_queue = "request_queue";
+
+        // Use the name of the request queue as the routing key
+
+	session.queueDeclare(arg::queue=request_queue);
+        session.queueBind(arg::queue=request_queue, arg::routingKey=request_queue);
+
+	// Create a listener for the request queue and start listening.
+
+	Listener listener(session, request_queue);
+	listener.listen();
+	listener.wait();
+
+
+  //-----------------------------------------------------------------------------
+
+        connection.close();
+        return 0;
+    } catch(const std::exception& error) {
+        std::cout << error.what() << std::endl;
+    }
+    return 1;
+}
+
+