0 Replies Latest reply on May 4, 2016 11:47 AM by Cheng Fang

    Batch Job Scheduling with JBeret

    Cheng Fang Master

      I recently added the following JBeret extension modules to support batch job scheduling:

      • jberet-schedule / jberet-schedule-executor
        • base module for JBeret scheduling capability
        • provides a ScheduledExecutorService-based job scheduler impl
        • supports batch job scheduling in Java SE environment, using java.util.concurrent.ScheduledExecutorService
        • supports batch job scheduling in Java EE, JBoss EAP & WildFly environment, using Java EE Concurrency Utils and javax.enterprise.concurrent.ManagedScheduledExecutorService
        • supports single-action and repeatable job schedules
      • jberet-schedule / jberet-schedule-timer
        • extends jberet-schedule-executor module with a EJB-Timer-based job scheduler impl
        • supports batch job scheduling in Java EE, JBoss EAP & WildFly environment, using EJB TimerService (persistent), or EJB Lite TimerService (non-persistent)
        • supports single-action, repeatable, and calendar-based job schedules
        • distributable, and supports schedule recovery and server restart

       

      jberet-ui has been updated to include scheduling requirements.  More details including screenshots are in JBERET-225 (Add Job Scheduling to jberet-ui), and jberet-ui screenshot images

       

      jberet-rest-api has been updated to include scheduling-related REST API.  More details are in JBERET-224 (Add Job Scheduling API to jberet-rest-api)

       

      More impl details can be found in JBERET-222 (Support Batch Job Scheduling)

       

      2 sample webapps were added to demonstrate this new feature:

       

      In addition, jberet-schedule-executor tests shows how to use job scheduling in Java SE environment.

       

      Besides the above 3 built-in types of JobScheduler, one can also implement and specify your own job scheduler.

       

      A comparison of job schedulers based on Java SE ScheduledExecutorService, Java EE Concurreny Utils ManagedScheduledExecutorService, and EJB Timer:

       

      Scheduled Executor Service

      Managed Scheduled Executor Service

      EJB Timer

      Suitable for

      Java SE

      Java EE

      Java EE

      Single action schedule

      Yes

      Yes

      Yes

      Repeatable schedule

      Yes

      Yes

      Yes

      Persistent

      No

      No

      Yes

      Calendar-based

      No

      Yes/No *

      Yes

      Distributable

      No

      No

      Yes

      QoS

      ?

      At most once

      At least once

       

      * ManagedScheduledExecutorService-based scheduler supports calendar-based single-action schedule, but does not support calendar-based repeatable schedule.

       

      We hope this can be useful in your batch application development, and feedback, bug reports and other contributions are always welcome.