The Terminal Window

To run the clients using the appclient command, follow these steps:

1. Run the AsynchConsumer program, specifying the topic destination type.

cd dist

appclient -client asynchconsumer.jar topic

The program displays the following lines and appears to hang:

Destination type is topic

To end program, type Q or q, then <return>

2. In the terminal window where you ran the Producer program previously, run the program

again, sending three messages. The command looks like this:

appclient -client producer.jar topic 3

The output of the program looks like this:

Destination type is topic

Sending message: This is message 1

Sending message: This is message 2

Sending message: This is message 3

In the other window, the AsynchConsumer program displays the following:

Destination type is topic

To end program, type Q or q, then <return>

Reading message: This is message 1

Reading message: This is message 2

Reading message: This is message 3

Message is not a TextMessage

The last line appears because the program has received the non-text control message sent by
the Producer program.

3. Type Q or q and press Return to stop the program.

4. Now run the programs using a queue. In this case, as with the synchronous example, you

can run the Producer program first, because there is no timing dependency between the
sender and receiver:

appclient -client producer.jar queue 3

The output of the program looks like this:

Destination type is queue

Sending message: This is message 1

Sending message: This is message 2

Sending message: This is message 3

Writing Simple JMS Client Applications

Chapter 31 · The Java Message Service API

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