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SQL Anywhere 12.0.1 » QAnywhere » How to write QAnywhere client applications » Sending QAnywhere messages » Transactional messaging implementation


Implementing transactional messaging for Java clients

 Create a transactional manager
  1. Initialize QAnywhere.

    This step is the same as in non-transactional messaging.

    import ianywhere.qanywhere.client.*;
    QAManagerFactory fact = QAManagerFactory.getInstance();
  2. Create a QATransactionalManager object.

    For example, to create a default QATransactionalManager object, invoke createQATransactionalManager with null as its parameter:

    QATransactionalManager mgr = fact.createQATransactionalManager();  // no argument

    You can alternatively create a QATransactionalManager object that is customized using a properties file. The properties file is specified in the createQATransactionalManager method:

    mgr = factory.createQATransactionalManager( "qa_mgr.props" );

    where qa_mgr.props is the name of the properties file that resides on the remote device.

  3. Initialize the QAManager object.;

You are now ready to send messages. The following procedure sends two messages in a single transaction.

 Send multiple messages in a single transaction
  1. Initialize message objects.

    QATextMessage msg_1;
    QATextMessage msg_2;
  2. Send the messages.

    The following code sends two messages in a single transaction:

         msg_1 = mgr.createTextMessage();
         msg_2 = mgr.createTextMessage();
         mgr.putMessage( "jms_1\\queue_name", msg_1 );
         mgr.putMessage( "jms_1\\queue_name", msg_2 );

    The commit method commits the current transaction and begins a new transaction. This method commits all putMessage() method and getMessage() method invocations.


    The first transaction begins with the call to open method.

 See also