Examples of org.eclipse.core.runtime.jobs.Job

org.eclipse.core.runtime.jobs.Job
Jobs are units of runnable work that can be scheduled to be run with the job manager. Once a job has completed, it can be scheduled to run again (jobs are reusable).
Jobs have a state that indicates what they are currently doing. When constructed, jobs start with a state value of NONE. When a job is scheduled to be run, it moves into the WAITING state. When a job starts running, it moves into the RUNNING state. When execution finishes (either normally or through cancelation), the state changes back to NONE.
A job can also be in the SLEEPING state. This happens if a user calls Job.sleep() on a waiting job, or if a job is scheduled to run after a specified delay. Only jobs in the WAITING state can be put to sleep. Sleeping jobs can be woken at any time using Job.wakeUp(), which will put the job back into the WAITING state.
Jobs can be assigned a priority that is used as a hint about how the job should be scheduled. There is no guarantee that jobs of one priority will be run before all jobs of lower priority. The javadoc for the various priority constants provide more detail about what each priority means. By default, jobs start in the LONG priority class. @see IJobManager @since 3.0

      };
    }


    /* Create a Normal Job */
    else {
      fJob = new Job("") { //$NON-NLS-1$
        @Override
        protected IStatus run(IProgressMonitor monitor) {
          try {
            if (!monitor.isCanceled() && fTask != null)
              return fTask.run(monitor);

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   */
  public void finish() {


    /* Run Retention since settings changed */
    if (fSettingsChanged) {
      Job retentionJob = new Job("Performing clean-up...") {


        @Override
        protected IStatus run(IProgressMonitor monitor) {
          try {
            monitor.beginTask("Performing clean-up...", fEntities.size());


            for (IEntity entity : fEntities) {
              if (entity instanceof IBookMark)
                RetentionStrategy.process((IBookMark) entity);
              else if (entity instanceof IFolder)
                RetentionStrategy.process((IFolder) entity);


              monitor.worked(1);
            }
          } finally {
            monitor.done();
          }


          return Status.OK_STATUS;
        }
      };


      retentionJob.schedule();
    }
  }

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    fBatchJob = createBatchJob();
    fIndexListener = registerListeners();
  }


  private Job createBatchJob() {
    Job job = new Job("Batch Job") {
      @Override
      protected IStatus run(IProgressMonitor monitor) {
        fBatchInProcess.set(false);
        fForceQuickUpdate.set(false);


        /* Update all saved searches */
        SafeRunner.run(new LoggingSafeRunnable() {
          public void run() throws Exception {
            updateSavedSearches(true);
          }
        });


        return Status.OK_STATUS;
      }
    };


    job.setSystem(true);
    job.setUser(false);


    return job;
  }

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        fScheduledJobs.decrementAndGet();
        break;
      }


      /* Create the Job */
      Job job = createJob();


      /* Listen to Job's Lifecycle */
      job.addJobChangeListener(new JobChangeAdapter() {


        /* Update Fields when a Job is Done */
        @Override
        public void done(IJobChangeEvent event) {
          fDone.incrementAndGet();


          if (fDone.get() == fTotalWork.get())
            fDuration.set(System.currentTimeMillis() - start);


          /* Re-Schedule this Job if there is work left to do */
          if (!fOpenTasksQueue.isEmpty())
            event.getJob().schedule();
          else
            fScheduledJobs.decrementAndGet();
        }
      });


      /*
       * Workaround: Since we are using our own Job for displaying Progress, we
       * don't want these Jobs show up in the Progress View. There is currently
       * no bug-free solution of aggregating the Progress of N Jobs into a
       * single Monitor.
       */
      job.setSystem(true);


      /* Schedule it immediately */
      job.schedule();
    }
  }

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    }
  }


  /* Create a Job for a Task to handle */
  private Job createJob() {
    Job job = new Job("") { //$NON-NLS-1$
      @Override
      protected IStatus run(final IProgressMonitor monitor) {


        /* Poll the next Task */
        final ITask task = fOpenTasksQueue.poll();

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   * @param delay
   * @param runnable
   */
  public static void runInBackgroundThread(int delay, final Runnable runnable) {
    Assert.isNotNull(runnable);
    Job job = new Job("Job Runner") { //$NON-NLS-1$
      @Override
      public IStatus run(IProgressMonitor monitor) {
        runnable.run();
        return Status.OK_STATUS;
      }
    };


    job.setSystem(true);
    job.setUser(false);
    job.schedule(delay);
  }

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    if (displayChange)
      EditorUtils.updateFilterAndGrouping();


    /* Peform clean-up on all BookMarks */
    if (runCleanup) {
      Job retentionJob = new Job("Performing clean-up...") {


        @Override
        protected IStatus run(IProgressMonitor monitor) {
          try {
            monitor.beginTask("Performing clean-up...", rootFolders.size());


            for (IFolder rootFolder : rootFolders) {
              RetentionStrategy.process(rootFolder);
              monitor.worked(1);
            }
          } finally {
            monitor.done();
          }


          return Status.OK_STATUS;
        }
      };


      retentionJob.schedule();
    }
  }

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      };
    }


    /* Create a Normal Job */
    else {
      fJob = new Job("") { //$NON-NLS-1$
        @Override
        protected IStatus run(IProgressMonitor monitor) {
          try {
            if (!monitor.isCanceled() && fTask != null)
              return fTask.run(monitor);

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    fBatchJob = createBatchJob();
    fIndexListener = registerListeners();
  }


  private Job createBatchJob() {
    Job job = new Job("") { //$NON-NLS-1$
      @Override
      protected IStatus run(IProgressMonitor monitor) {
        fBatchInProcess.set(false);
        fForceQuickUpdate.set(false);


        /* Update all saved searches */
        SafeRunner.run(new LoggingSafeRunnable() {
          public void run() throws Exception {
            if (!Controller.getDefault().isShuttingDown())
              updateSavedSearches(true);
          }
        });


        return Status.OK_STATUS;
      }
    };


    job.setSystem(true);
    job.setUser(false);


    return job;
  }

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      });
    }
  }


  private void scheduleUpdate(final IBookMark bookMark, Long intervalInSeconds) {
    Job updateJob = new ReloadJob(bookMark, ""); //$NON-NLS-1$
    updateJob.setSystem(true);
    updateJob.schedule(intervalInSeconds * 1000);
  }

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