[jboss-jira] [JBoss JIRA] Closed: (JBAS-3282) ScheduleManager MBean uses fixed-rate execution on Java 1.4 and fixed-delay execution on Java 5.0

[Dimitris Andreadis (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBAS-3282?page=all ]

Dimitris Andreadis closed JBAS-3282.
------------------------------------

    Fix Version/s: JBossAS-5.0.0.Beta
       Resolution: Done

Schedule & SchedulerManager mbeans now have a FixedRate attribute which is false by default to match the default JMX Timer scheduling behaviour of FixedDelay execution as of JDK5 or JBoss v4.0.5.

However, in the example configurations of:
deploy/scheduler-service.xml
deploy/schedule-manager-service.xml

The default is overriden using FixedRate==true to match the expected behaviour of the jboss 4.x Timer, over jdk1.4 (which is FixedRate).

> ScheduleManager MBean uses fixed-rate execution on Java 1.4 and fixed-delay execution on Java 5.0
> -------------------------------------------------------------------------------------------------
>
>                 Key: JBAS-3282
>                 URL: http://jira.jboss.com/jira/browse/JBAS-3282
>             Project: JBoss Application Server
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Scheduling/Timers
>    Affects Versions: JBossAS-4.0.4.GA
>            Reporter: Darran Lofthouse
>         Assigned To: Dimitris Andreadis
>            Priority: Critical
>             Fix For: JBossAS-5.0.0.Beta, JBossAS-4.0.5.CR1
>
>
> The ScheduleManager MBean uses fixed-rate execution on Java 1.4 and fixed-delay execution on Java 5.0
> The reason for this is because the ScheduleManager makes use of the javax.management.timer.Timer class, when running with Java 1.4 we use our implementation of the timer but when running with Java 5.0 we use the JRE implementation.
> To get fixed-rate execution (which has been our default till Java 5.0) the ScheduleManager should be using the method addNotification(String, String, Object, Date, long, long, boolean) with the final boolean set to true.
> We should possibly make the decision to use fixed-delay or fixed-rate configurable incase people are already expecting fixed-dalay with Java 5.0.

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