Patterns: Implementing Self-Service in an SOA Environment

368 Patterns: Implementing Self-Service in an SOA Environment

Figure 11-4 Specifing a message selector for a message-driven dean

The selector string can refer to fields in the JMS message header and fields in

the message properties. Message selectors cannot reference message body

values.

11.3.4 Message time-to-live

The default messaging provider provides a mechanism through JMS to set the

time-to-live of a message. The code in Example 11-2 shows how we can set

time-to-live within this scenario to 20 seconds.

Example 11-2 Setting the JMS message time-to-live

producer.send(reqMsg,DeliveryMode.NON_PERSISTENT,0,20000);

Setting the message time-to-live is an important best practice to avoid large

numbers of unconsumed messages on queues.