/**
* Returns a worker id for the given worker.
*
* @param workerNetAddress the worker {@link WorkerNetAddress}
* @return the worker id for this worker
*/
public long getWorkerId(WorkerNetAddress workerNetAddress) {
// TODO(gene): This NetAddress cloned in case thrift re-uses the object. Does thrift re-use it?
synchronized (mWorkers) {
if (mWorkers.contains(mAddressIndex, workerNetAddress)) {
// This worker address is already mapped to a worker id.
long oldWorkerId = mWorkers.getFirstByField(mAddressIndex, workerNetAddress).getId();
LOG.warn("The worker {} already exists as id {}.", workerNetAddress, oldWorkerId);
return oldWorkerId;
}
if (mLostWorkers.contains(mAddressIndex, workerNetAddress)) {
// this is one of the lost workers
final MasterWorkerInfo lostWorkerInfo =
mLostWorkers.getFirstByField(mAddressIndex, workerNetAddress);
final long lostWorkerId = lostWorkerInfo.getId();
LOG.warn("A lost worker {} has requested its old id {}.", workerNetAddress, lostWorkerId);
// Update the timestamp of the worker before it is considered an active worker.
lostWorkerInfo.updateLastUpdatedTimeMs();
mWorkers.add(lostWorkerInfo);
mLostWorkers.remove(lostWorkerInfo);
return lostWorkerId;
}
// Generate a new worker id.
long workerId = mNextWorkerId.getAndIncrement();
mWorkers.add(new MasterWorkerInfo(workerId, workerNetAddress));
LOG.info("getWorkerId(): WorkerNetAddress: {} id: {}", workerNetAddress, workerId);
return workerId;
}
}
/**
* Adds the given inode to the set of children.
*
* @param child the inode to add
*/
public synchronized void addChild(Inode child) {
mChildren.add(child);
}