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Diffstat (limited to 'trunk/qpid/cpp/examples/pub-sub/topic_publisher.cpp')
-rw-r--r-- | trunk/qpid/cpp/examples/pub-sub/topic_publisher.cpp | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/trunk/qpid/cpp/examples/pub-sub/topic_publisher.cpp b/trunk/qpid/cpp/examples/pub-sub/topic_publisher.cpp new file mode 100644 index 0000000000..aed5f8f033 --- /dev/null +++ b/trunk/qpid/cpp/examples/pub-sub/topic_publisher.cpp @@ -0,0 +1,129 @@ +/* + * + * 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. + * + */ + +/** + * topic_publisher.cpp: + * + * This program is one of two programs designed to be used + * together. These programs implement a publish-subscribe example + * using the "amq.topic" exchange. + * + * topic_publisher.cpp (this program) + * + * Sends messages to the "amq.topic" exchange, using the + * multipart routing keys "usa.news", "usa.weather", + * "europe.news", and "europe.weather". + * + * topic_listener.cpp + * + * Creates private queues for "news", "weather", "usa", and + * "europe", binding them to the amq.topic exchange using + * bindings that match the corresponding parts of the multipart + * routing keys. + * + * Multiple listeners can be run at the same time. + * + */ + + +#include <qpid/client/Connection.h> +#include <qpid/client/Session.h> +#include <qpid/client/AsyncSession.h> +#include <qpid/client/Message.h> + + +#include <cstdlib> +#include <iostream> + +#include <sstream> + +using namespace qpid::client; +using namespace qpid::framing; + +using std::stringstream; +using std::string; + +void publish_messages(Session& session, string routing_key) +{ + Message message; + + // Set the routing key once, we'll use the same routing key for all + // messages. + + message.getDeliveryProperties().setRoutingKey(routing_key); + for (int i=0; i<5; i++) { + stringstream message_data; + message_data << "Message " << i; + + message.setData(message_data.str()); + // Asynchronous transfer sends messages as quickly as + // possible without waiting for confirmation. + async(session).messageTransfer(arg::content=message, arg::destination="amq.topic"); + } + +} + +/* + * no_more_messages() + * + * Send a message to indicate that no more messages are coming. + * Use the 'control' routing key (see comments in topic_config_queues.cpp). + * + */ + +void no_more_messages(Session& session) +{ + Message message; + + message.getDeliveryProperties().setRoutingKey("control"); + message.setData("That's all, folks!"); + session.messageTransfer(arg::content=message, arg::destination="amq.topic"); +} + +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 -------------------------------------------- + + publish_messages(session, "usa.news"); + publish_messages(session, "usa.weather"); + publish_messages(session, "europe.news"); + publish_messages(session, "europe.weather"); + + no_more_messages(session); + + //----------------------------------------------------------------------------- + + connection.close(); + return 0; + } catch(const std::exception& error) { + std::cout << error.what() << std::endl; + } + return 1; +} + + |