public final boolean setSemaphore(final Transaction trans, final String name, final int timeout) {
if (name == null) {
throw new NullPointerException();
}
synchronized (_lock) {
if (_semaphores == null) {
_semaphores = new Hashtable4(10);
}
}
final BooleanByRef acquired = new BooleanByRef();
_semaphoresLock.run(
new Closure4() {
public Object run() {
try {
Transaction transaction = checkTransaction(trans);
Object candidateTransaction = _semaphores.get(name);
if (trans == candidateTransaction) {
acquired.value = true;
return null;
}
if (candidateTransaction == null) {
_semaphores.put(name, transaction);
acquired.value = true;
return null;
}
long endtime = System.currentTimeMillis() + timeout;
long waitTime = timeout;
while (waitTime > 0) {
_semaphoresLock.awake();
_semaphoresLock.snooze(waitTime);
if (classCollection() == null) {
acquired.value = false;
return null;
}
candidateTransaction = _semaphores.get(name);
if (candidateTransaction == null) {
_semaphores.put(name, transaction);
acquired.value = true;
return null;
}
waitTime = endtime - System.currentTimeMillis();
}
acquired.value = false;
return null;
} finally {
_semaphoresLock.awake();
}
}
});
return acquired.value;
}
public final void releaseSemaphore(final Transaction trans, final String name) {
synchronized (_lock) {
if (_semaphores == null) {
return;
}
}
_semaphoresLock.run(
new Closure4() {
public Object run() {
Transaction transaction = checkTransaction(trans);
if (_semaphores != null && transaction == _semaphores.get(name)) {
_semaphores.remove(name);
}
_semaphoresLock.awake();
return null;
}
});
}
public void releaseSemaphores(final Transaction trans) {
if (_semaphores != null) {
final Hashtable4 semaphores = _semaphores;
_semaphoresLock.run(
new Closure4() {
public Object run() {
semaphores.forEachKeyForIdentity(
new Visitor4() {
public void visit(Object a_object) {
semaphores.remove(a_object);
}
},
trans);
_semaphoresLock.awake();
return null;
}
});
}
}