AMQP CPP example

ActiveMQ is a multi protocol broker. It will inspect the initial handshake of clients to determine what protocol to use.

All you need to do is to connect a client into activemq's configured port and you should be able connect.

To run this example simply run the command mvn verify -Pexample, execute the compile.sh script and start the executable called ./hello

    # first make sure you have the dependencies you need to compile and run the client
    # You will have to adapt this step according to your platform. Consult the qpid docs for more information.
    # There is a list of packages you can install as well.
    [proton-cpp]$ sudo yum install qpid-cpp-client-devel

    # on a first window
    [proton-cpp]$ mvn verify -Pexample

    # on a second window
    # That goes without saying but you will of course need g++ (the C++ compiler) installed
    [proton-cpp]$ ./compile.sh
    [proton-cpp]$ ./hello

You don't need to do anything special to configure the ActiveMQ server to accept AMQP clients.

Just for the sake of documentation though we are setting the port of ActiveMQ on this example as 5672 which is the port qpid have by default.

This is totally optional and you don't need to follow this convention. You can use any port you chose including ActiveMQ's 61616 default port

     
         <acceptor name="proton-acceptor">tcp://localhost:5672</acceptor>

Example step-by-step

We are using qpid cpp client on this example. There are several libraries you may chose from for AMQP. We have ellect one that we consider simple enough for users.

This example is based on qpid's hello world example.

  1. qpid-cpp-client-devel installed.

    2. Assuming you are on Linux Fedora, you will need to run this following command

            yum install qpid-cpp-client-devel

    Consult the qpid documentation, and the required packages for information on other platoforms.

  2. Make the proper C++ imports
  3. Create an amqp qpid 1.0 connection.
    4.            
        std::string broker = argc > 1 ? argv[1] : "localhost:61616";
        std::string address = argc > 2 ? argv[2] : "jms.queue.exampleQueue";
        std::string connectionOptions = argc > 3 ? argv[3] : "{protocol:amqp1.0}"; // Look at the docs for more options

        Connection connection(broker, connectionOptions);
        connection.open();
  4. Create a session
    5.        Session session = connection.createSession();
  5. Create a sender
    6.        Sender sender = session.createSender(address);
  6. send a simple message
    7.        sender.send(Message("Hello world!"));
  7. create a receiver
    8.        Receiver receiver = session.createReceiver(address);
  8. receive the simple message
    9.       Message message = receiver.fetch(Duration::SECOND * 1);
  9. acknowledge the message
    10.       session.acknowledge();
  10. close the connection
    11.       connection.close();