@SuppressWarnings("unchecked")
public void restoreFromMemento(OpenmrsMemento memento) {
if (memento != null && memento instanceof TimerSchedulerMemento) {
TimerSchedulerMemento timerMemento = (TimerSchedulerMemento) memento;
Set<Integer> taskIds = (HashSet<Integer>) timerMemento.getState();
// try to start all of the tasks that were stopped right before this restore
for (Integer taskId : taskIds) {
TaskDefinition task = getTask(taskId);
try {
scheduleTask(task);
} catch (Exception e) {
// essentially swallow exceptions
log.debug(
"EXPECTED ERROR IF STOPPING THIS TASK'S MODULE: Unable to start task " + taskId, e);
// save this errored task and try again next time we restore
timerMemento.addErrorTask(taskId);
}
}
timerMemento = null; // so the old cl can be gc'd
}
}
/**
* Saves and stops all active tasks
*
* @return OpenmrsMemento
*/
public OpenmrsMemento saveToMemento() {
Set<Integer> tasks = new HashSet<Integer>();
for (TaskDefinition task : getScheduledTasks()) {
tasks.add(task.getId());
try {
shutdownTask(task);
} catch (SchedulerException e) {
// just swallow exceptions
log.debug("Failed to stop task while saving memento " + task.getName(), e);
}
}
TimerSchedulerMemento memento = new TimerSchedulerMemento(tasks);
memento.saveErrorTasks();
return memento;
}
