WAS v8.5 > Develop applications > Develop Scheduler service > Develop and schedule tasks

Scheduler tasks and Java EE context

When a task is created using the Scheduler API create() method, the Java EE thread context of the creator is stored with the scheduled task. When the task runs, the original Java EE thread context is reapplied to the thread before calling the customer TaskInfo instance.

The scheduler service utilizes the asynchronous beans deferred start mechanism to propagate Java EE service context information to a task when it runs. The amount of service context information that is propagated is controlled by the Service Context settings on the WorkManager configuration object that schedulers reference. For example, security and internationalization service contexts can be enabled. See the Using asynchronous beans topic for details on how to configure the Application Server to propagate these service contexts.

Subtopics

• Transactions and schedulers
  The scheduler runs a task in a single global transaction, by default. We can use the QOS_ONLYONCE or QOS_ATLEASTONCE quality of service to specify whether the task runs as a single unit of work once or as independent transactions.
• Scheduler task user authorization
  The scheduler service uses the asynchronous beans deferred start mechanism to propagate Java EE service context information to a task when it runs. If we plan to secure the application using the JAAS security context of the administrative security mechanism built into WebSphere Application Server, create each task with the correct credentials on the thread.
• Transactions and schedulers
  The scheduler runs a task in a single global transaction, by default. We can use the QOS_ONLYONCE or QOS_ATLEASTONCE quality of service to specify whether the task runs as a single unit of work once or as independent transactions.
• Scheduler task user authorization
  The scheduler service uses the asynchronous beans deferred start mechanism to propagate Java EE service context information to a task when it runs. If we plan to secure the application using the JAAS security context of the administrative security mechanism built into WAS, create each task with the correct credentials on the thread.

Related

Secure scheduler tasks
Use asynchronous beans

+

Search Tips   |   Advanced Search