Examples of hudson.util.DoubleLaunchChecker

hudson.util.DoubleLaunchChecker

Makes sure that no other Hudson uses our JENKINS_HOME directory, to forestall the problem of running multiple instances of Hudson that point to the same data directory.

This set up error occasionally happens especialy when the user is trying to reassign the context path of the app, and it results in a hard-to-diagnose error, so we actively check this.

The mechanism is simple. This class occasionally updates a known file inside the hudson home directory, and whenever it does so, it monitors the timestamp of the file to make sure no one else is updating this file. In this way, while we cannot detect the problem right away, within a reasonable time frame we can detect the collision.

More traditional way of doing this is to use a lock file with PID in it, but unfortunately in Java, there's no reliabe way to obtain PID. @author Kohsuke Kawaguchi @since 1.178

     */
    public static Timer timer;


    @Initializer(after=JOB_LOADED)
    public static void init() {
        new DoubleLaunchChecker().schedule();


        // start all PeridocWorks
        for(PeriodicWork p : PeriodicWork.all())
            timer.scheduleAtFixedRate(p,p.getInitialDelay(),p.getRecurrencePeriod());

     */
    public static Timer timer;


    @Initializer(after=JOB_LOADED)
    public static void init() {
        new DoubleLaunchChecker().schedule();


        // start all PeridocWorks
        for(PeriodicWork p : PeriodicWork.all())
            timer.scheduleAtFixedRate(p,p.getInitialDelay(),p.getRecurrencePeriod());

Examples of hudson.util.DoubleLaunchChecker

Related Classes of hudson.util.DoubleLaunchChecker