19.6. WebSphere MQ JAVA tracing

WebSphere MQ JMS applications normally invoke trace by using command line arguments to the JAVA command. For example:

java -DMQJMS_TRACE_LEVEL=base  myJMSApplication

Sometimes this is not possible, for example when the JMS application is started as a servlet within an application server. In this case it may be appropriate to invoke trace from within the source code.

This can be done as follows:

  • com.ibm.mq.jms.services.ConfigEnvironment.start();

    This uses MQJMS TRACE_LEVEL and _DIR from the system properties.

  • com.ibm.mq.jms.services.ConfigEnvironment.start(String level);

    This uses MQJMS_TRACE_DIR; the level parameter should “on,” or “base.”

  • com.ibm.mq.jms.services.ConfigEnvironment.stop();

The value of MQJMS_TRACE_DIR ...

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