/**
* Plan for some additional workers to be launched.
*
* @param numWorkers The number of workers to allocate.
*/
@Override
protected void requestNewWorkers(int numWorkers) {
try {
List<TaskMonitor.TaskGoalStateUpdated> toMonitor = new ArrayList<>(numWorkers);
List<LaunchableTask> toLaunch = new ArrayList<>(numWorkers);
// generate new workers into persistent state and launch associated actors
for (int i = 0; i < numWorkers; i++) {
MesosWorkerStore.Worker worker = MesosWorkerStore.Worker.newWorker(workerStore.newTaskID());
workerStore.putWorker(worker);
workersInNew.put(extractResourceID(worker.taskID()), worker);
LaunchableMesosWorker launchable = createLaunchableMesosWorker(worker.taskID());
LOG.info(
"Scheduling Mesos task {} with ({} MB, {} cpus).",
launchable.taskID().getValue(),
launchable.taskRequest().getMemory(),
launchable.taskRequest().getCPUs());
toMonitor.add(new TaskMonitor.TaskGoalStateUpdated(extractGoalState(worker)));
toLaunch.add(launchable);
}
// tell the task router about the new plans
for (TaskMonitor.TaskGoalStateUpdated update : toMonitor) {
taskRouter.tell(update, self());
}
// tell the launch coordinator to launch the new tasks
if (toLaunch.size() >= 1) {
launchCoordinator.tell(new LaunchCoordinator.Launch(toLaunch), self());
}
} catch (Exception ex) {
fatalError("unable to request new workers", ex);
}
}
