@Override
public LockResult acquireLock(
final OLATResourceable ores, final OLATPrincipal requestor, final String locksubkey) {
final String asset = OresHelper.createStringRepresenting(ores, locksubkey);
final LockResult res =
syncer.doInSync(
ores,
new SyncerCallback<LockResult>() {
@Override
public LockResult execute() {
LockResultImpl lres;
LockImpl li = clusterLockManager.findLock(asset);
if (li == null) { // fine, we can lock it
li = clusterLockManager.createLockImpl(asset, requestor);
clusterLockManager.saveLock(li);
final LockEntry le =
new LockEntry(li.getAsset(), li.getCreationDate().getTime(), li.getOwner());
lres = new LockResultImpl(true, le);
} else {
// already locked by a user.
// if that user is us, we can reacquire it
final LockEntry le =
new LockEntry(li.getAsset(), li.getCreationDate().getTime(), li.getOwner());
if (requestor.equals(li.getOwner())) {
// that's us -> success (asset, owner is the
// same, and we leave creationdate to when the
// lock was originally acquired, not
// when it was reacquired.
lres = new LockResultImpl(true, le);
} else {
log.info(
"Lock for resource: "
+ asset
+ " requested by "
+ requestor
+ " already held by "
+ li.getOwner());
lres = new LockResultImpl(false, le);
}
}
return lres;
}
});
return res;
}
@Override
public boolean isLocked(final OLATResourceable ores, final String locksubkey) {
final String asset = OresHelper.createStringRepresenting(ores, locksubkey);
final LockImpl li = clusterLockManager.findLock(asset);
return (li != null);
}