Setup Scheduler Service on JBoss Application Server

 Step1). Create a directory somewhere in your file system like "/home/username/SchedulerDemo/SchedulerDemo".
Step 2). Configure a scheduler mbean in jboss-server.xml or create a "myScheduler-service.xml" inside "/home/username/SchedulerDemo/SchedulerDemo" directory as following:

xml version="1.0" encoding="UTF-8"?>

<server>

    <mbean code="org.jboss.varia.scheduler.Scheduler" name="jboss.test:service=MyScheduler">

        <attribute name="StartAtStartup">true</attribute>

        <attribute name="SchedulableClass">test.MySchedulable</attribute>

        <attribute name="SchedulableArguments">MySchedulable,100</attribute>

        <attribute name="SchedulableArgumentTypes">java.lang.String,long</attribute>

        <attribute name="InitialStartDate">NOW</attribute>

        <attribute name="SchedulePeriod">5000</attribute>

        <attribute name="InitialRepetitions">10</attribute>

    </mbean>

</server>

 

 

Step3). Write the Schedulable class “MySchedulable.java” inside “/home/username/SchedulerDemo/SchedulerDemo” directory as following:

package test;

import java.util.Date;

import org.jboss.varia.scheduler.Schedulable;

import org.apache.log4j.Logger;

public class MySchedulable implements Schedulable

{

    private static final Logger log = Logger.getLogger(MySchedulable.class);

 

    private String name;

    private long value;

 

    public MySchedulable(String name, long value)

    {

        this.name = name;

        this.value = value;

        log.info("nt name: " + name + ", value: " + value);

    }

 

    public void perform(Date now, long repetitions)

    {

        log.info("perform(), time: " + now +", repetitions: " + repetitions +", name: " + name + ", value: " + value);

    }

}

InitialRepetitions=10 means in each repetition of perform() the value will be decreased by 1 and the total repetition will be 10.
MySchedulable,100 are the String and long value which we want to pass to our Schedulable class constructor while initialization.
test.MySchedulable: is the name of our Schedulable class.
java.lang.String,long: Are the argument types of the constructor of our Schedulable class.
NOW : represents the current Data/Time stamp
5000: Is the SchedulePeriod which means the perform() of our schedulable class will be invoked at every 5 seconds interval.
InitialRepetitions=10 means in each repetition of perform() the value will be decreased by 1 and the total repetition will be 10.

Step4). Make sure that your CLASSPATH and PATH is set as following before compiling the above program:

export JAVA_HOME=/home/userone/jdk1.6.0_21

export PATH=$JAVA_HOME/bin:$PATH

export JBOSS_HOME=/home/userone/jboss-5.1/jboss-as

export CLASSPATH=$JBOSS_HOME/common/lib/scheduler-plugin.jar:$JBOSS_HOME/client/log4j.jar:$CLASSPATH:.:

Step5). Now compile the MySchedulable.java as following and then make a Jar of it:

javac -d . MySchedulable.java

jar cvf myscheduler.jar test MySchedulable.java myScheduler-service.xml

Step6). Now deploy the “myscheduler.jar” inside the “$PROFILE/deploy” directory. you will see the following kind of output after deploying the Schedulable Service:

15:02:21,786 INFO  [MySchedulable]

     name: MySchedulable, value: 100

15:02:22,787 INFO  [MySchedulable] perform(), time: Sun  15:02:22 IST 2011, repetitions: 9, name: MySchedulable, value: 100

15:02:27,787 INFO  [MySchedulable] perform(), time: Sun  15:02:27 IST 2011, repetitions: 8, name: MySchedulable, value: 100

15:02:32,788 INFO  [MySchedulable] perform(), time: Sun  15:02:32 IST 2011, repetitions: 7, name: MySchedulable, value: 100

15:02:37,788 INFO  [MySchedulable] perform(), time: Sun  15:02:37 IST 2011, repetitions: 6, name: MySchedulable, value: 100

15:02:42,789 INFO  [MySchedulable] perform(), time: Sun  15:02:42 IST 2011, repetitions: 5, name: MySchedulable, value: 100

15:02:47,790 INFO  [MySchedulable] perform(), time: Sun  15:02:47 IST 2011, repetitions: 4, name: MySchedulable, value: 100

15:02:52,790 INFO  [MySchedulable] perform(), time: Sun  15:02:52 IST 2011, repetitions: 3, name: MySchedulable, value: 100

15:02:57,791 INFO  [MySchedulable] perform(), time: Sun  15:02:57 IST 2011, repetitions: 2, name: MySchedulable, value: 100

15:03:02,791 INFO  [MySchedulable] perform(), time: Sun  15:03:02 IST 2011, repetitions: 1, name: MySchedulable, value: 100

15:03:07,792 INFO  [MySchedulable] perform(), time: Sun  15:03:07 IST 2011, repetitions: 0, name: MySchedulable, value: 100

Step7). Once the Scheduling is over and repetition is 0 you can restart your Scheduled task using the jmx-console “jboss.test—>service=MyScheduler”
operation “restartSchedule” similarly you can change the schedule interval and repetition etc from jmx-console.


 More information about the different attribute which can be defined inside the myScheduler-service.xml file can be found in the following link: http://docs.jboss.org/jbossas/docs/Server_Configuration_Guide/4/html/Scheduling_Tasks-org.jboss.varia.scheduler.Scheduler_.html

Reference: http://middlewaremagic.com/jboss/?p=320