Java restrictions

When you are developing Java™ applications, various restrictions apply otherwise problems might occur when the applications are running in CICS®.

The following restrictions apply for Java applications used in CICS:

• System.exit() method: this method cannot be used in Java applications otherwise the application abnormally ends, the JVM server shuts down, and CICS shuts down. Use a security policy to disable support for System.exit(). For related information see Enabling a Java security manager.
• JCICS API calls: these calls cannot be used in the activator classes of OSGi bundles.
  Note: The Java thread that runs the OSGi bundle activator will not be JCICS-enabled. You can start a new JCICS-enabled thread from an activator using the CICSExecutorService.runAsCICS() API. There is more information in Threads and tasks example.
• Start and stop methods used in bundle activators: these methods must return in a reasonable amount of time.