2.12. JMS Message Selectors

A JMS message selector enables you to filter the messages that a MessageConsumer receives. To filter a message, a selector uses all the message headers and properties for filtering. However, it does not use the message content. Depending on the type of destination, a message selector works in the following ways:

In Red Hat JBoss AMQ 6.2 release, a selector expression does not match if you apply it to a non-existent header. For example, if the selector message displays , ensure that the header exists with defined values. If not, the selector does not match the undefined values. Now, if a non-existent header exists, use the following expression: