/** Remove the complete queued object list. FIXME extract some method */
public LinkObject remove() {
LinkObject element;
boolean gotLock;
if (!enabled) {
if (log.isInfoEnabled()) log.info("FastQueue.remove: queue disabled, remove aborted");
return null;
}
gotLock = lock.lockRemove();
try {
if (!gotLock) {
if (enabled) {
if (log.isInfoEnabled())
log.info("FastQueue.remove: Remove aborted although queue enabled");
} else {
if (log.isInfoEnabled()) log.info("FastQueue.remove: queue disabled, remove aborted");
}
return null;
}
if (log.isTraceEnabled()) {
log.trace("FastQueue.remove: remove starting with size " + size);
}
if (checkLock) {
if (inRemove) log.warn("FastQueue.remove: Detected other remove");
inRemove = true;
if (inMutex) log.warn("FastQueue.remove: Detected other mutex in remove");
inMutex = true;
}
element = first;
first = last = null;
size = 0;
if (checkLock) {
if (!inMutex) log.warn("FastQueue.remove: Cancelled by other mutex in remove");
inMutex = false;
if (!inRemove) log.warn("FastQueue.remove: Cancelled by other remove");
inRemove = false;
}
if (log.isTraceEnabled()) {
log.trace("FastQueue.remove: remove ending with size " + size);
}
} finally {
lock.unlockRemove();
}
return element;
}
public void setEnabled(boolean enable) {
enabled = enable;
if (!enabled) {
lock.abortRemove();
last = first = null;
}
}
/**
* Set add wait timeout (default 10000 msec)
*
* @param timeout
*/
public void setAddWaitTimeout(long timeout) {
addWaitTimeout = timeout;
lock.setAddWaitTimeout(addWaitTimeout);
}
/**
* get current add wait timeout
*
* @return current wait timeout
*/
public long getAddWaitTimeout() {
addWaitTimeout = lock.getAddWaitTimeout();
return addWaitTimeout;
}
/** Generate Queue SingleRemoveSynchronizedAddLock and set add and wait Timeouts */
public FastQueue() {
lock = new SingleRemoveSynchronizedAddLock();
lock.setAddWaitTimeout(addWaitTimeout);
lock.setRemoveWaitTimeout(removeWaitTimeout);
}
/**
* Add new data to the queue.
*
* <p>FIXME extract some method
*/
public boolean add(ChannelMessage msg, Member[] destination, InterceptorPayload payload) {
boolean ok = true;
if (!enabled) {
if (log.isInfoEnabled()) log.info("FastQueue.add: queue disabled, add aborted");
return false;
}
lock.lockAdd();
try {
if (log.isTraceEnabled()) {
log.trace("FastQueue.add: starting with size " + size);
}
if (checkLock) {
if (inAdd) log.warn("FastQueue.add: Detected other add");
inAdd = true;
if (inMutex) log.warn("FastQueue.add: Detected other mutex in add");
inMutex = true;
}
if ((maxQueueLength > 0) && (size >= maxQueueLength)) {
ok = false;
if (log.isTraceEnabled()) {
log.trace(
"FastQueue.add: Could not add, since queue is full ("
+ size
+ ">="
+ maxQueueLength
+ ")");
}
} else {
LinkObject element = new LinkObject(msg, destination, payload);
if (size == 0) {
first = last = element;
size = 1;
} else {
if (last == null) {
ok = false;
log.error(
"FastQueue.add: Could not add, since last is null although size is "
+ size
+ " (>0)");
} else {
last.append(element);
last = element;
size++;
}
}
}
if (first == null) {
log.error("FastQueue.add: first is null, size is " + size + " at end of add");
}
if (last == null) {
log.error("FastQueue.add: last is null, size is " + size + " at end of add");
}
if (checkLock) {
if (!inMutex) log.warn("FastQueue.add: Cancelled by other mutex in add");
inMutex = false;
if (!inAdd) log.warn("FastQueue.add: Cancelled by other add");
inAdd = false;
}
if (log.isTraceEnabled()) log.trace("FastQueue.add: add ending with size " + size);
} finally {
lock.unlockAdd(true);
}
return ok;
}
/** unlock queue for next remove */
public void unlockRemove() {
lock.unlockRemove();
}
/** unlock queue for next add */
public void unlockAdd() {
lock.unlockAdd(size > 0 ? true : false);
}
/**
* set remove wait timeout ( default 30000 msec)
*
* @param timeout
*/
public void setRemoveWaitTimeout(long timeout) {
removeWaitTimeout = timeout;
lock.setRemoveWaitTimeout(removeWaitTimeout);
}
/**
* get current remove wait timeout
*
* @return The timeout
*/
public long getRemoveWaitTimeout() {
removeWaitTimeout = lock.getRemoveWaitTimeout();
return removeWaitTimeout;
}
