public void adjustPoolSize(int newCorePoolSize, int newMaxPoolSize) {
if ((newCorePoolSize < 0) || (newMaxPoolSize <= 0) || (newMaxPoolSize < newCorePoolSize)) {
throw new IllegalArgumentException();
}
_mainLock.lock();
try {
int surplusCoreThreads = _corePoolSize - newCorePoolSize;
int surplusMaxPoolSize = _maxPoolSize - newMaxPoolSize;
_corePoolSize = newCorePoolSize;
_maxPoolSize = newMaxPoolSize;
if (((surplusCoreThreads > 0) && (_poolSize > _corePoolSize))
|| ((surplusMaxPoolSize > 0) && (_poolSize > _maxPoolSize))) {
int interruptCount = Math.max(surplusCoreThreads, surplusMaxPoolSize);
for (WorkerTask workerTask : _workerTasks) {
if (interruptCount > 0) {
if (workerTask._interruptIfWaiting()) {
interruptCount--;
}
} else {
break;
}
}
} else {
Runnable runnable = null;
while ((surplusCoreThreads++ < 0)
&& (_poolSize < _corePoolSize)
&& ((runnable = _taskQueue.poll()) != null)) {
_doAddWorkerThread(runnable);
}
}
} finally {
_mainLock.unlock();
}
}
@Override
public void shutdown() {
_mainLock.lock();
try {
int state = _runState;
if (state < _SHUTDOWN) {
_runState = _SHUTDOWN;
}
for (WorkerTask workerTask : _workerTasks) {
workerTask._interruptIfWaiting();
}
_tryTerminate();
} finally {
_mainLock.unlock();
}
}