protected void flush(final Address new_coord) throws InterruptedException {
// wait until all threads currently sending messages have returned (new threads after
// flushing=true) will block
// flushing is set to true in startFlusher()
while (flushing && running) {
if (in_flight_sends.get() == 0) break;
Thread.sleep(100);
}
send_lock.lockInterruptibly();
try {
if (log.isTraceEnabled())
log.trace(local_addr + ": coord changed from " + coord + " to " + new_coord);
coord = new_coord;
is_coord = Objects.equals(local_addr, coord);
flushMessagesInForwardTable();
} finally {
if (log.isTraceEnabled()) log.trace(local_addr + ": flushing completed");
flushing = false;
ack_mode = true; // go to ack-mode after flushing
num_acks = 0;
send_cond.signalAll();
send_lock.unlock();
}
}
/**
* Gets connection listener instance associated with transaction. This method is package protected
* beacause it is intended only for test case use. Please don't use it in your production code.
*
* @param trackByTransaction transaction instance
* @param mcp the managed connection pool associated with the desired connection listener
* @return connection listener instance
* @throws ResourceException Thrown if an error occurs
*/
ConnectionListener getTransactionOldConnection(
Transaction trackByTransaction, ManagedConnectionPool mcp) throws ResourceException {
TransactionSynchronizationRegistry tsr = getTransactionSynchronizationRegistry();
Lock lock = getLock();
try {
lock.lockInterruptibly();
} catch (InterruptedException ie) {
Thread.interrupted();
throw new ResourceException(bundle.unableObtainLock(), ie);
}
try {
// Already got one
ConnectionListener cl = (ConnectionListener) tsr.getResource(mcp);
if (cl != null) {
if (trace)
log.tracef("Previous connection tracked by transaction=%s tx=%s", cl, trackByTransaction);
return cl;
}
return null;
} finally {
lock.unlock();
}
}
public void f() {
try {
lock.lockInterruptibly();
} catch (InterruptedException e) {
System.err.println("ReentrantLockBlockTask is interrupted");
}
System.out.println("Exit from ReentrantLockBlockTask");
}
public void f() {
try {
lock.lockInterruptibly();
System.out.println("lock acquired in f()");
} catch (InterruptedException e) {
System.out.println("Interrupted from lock acquisition in f()");
}
}
@Override
protected void handleMessageInternal(Message<?> message) throws Exception {
Object correlationKey = correlationStrategy.getCorrelationKey(message);
Assert.state(
correlationKey != null,
"Null correlation not allowed. Maybe the CorrelationStrategy is failing?");
if (logger.isDebugEnabled()) {
logger.debug("Handling message with correlationKey [" + correlationKey + "]: " + message);
}
UUID groupIdUuid = UUIDConverter.getUUID(correlationKey);
Lock lock = this.lockRegistry.obtain(groupIdUuid.toString());
lock.lockInterruptibly();
try {
ScheduledFuture<?> scheduledFuture = this.expireGroupScheduledFutures.remove(groupIdUuid);
if (scheduledFuture != null) {
boolean canceled = scheduledFuture.cancel(true);
if (canceled && logger.isDebugEnabled()) {
logger.debug(
"Cancel 'forceComplete' scheduling for MessageGroup with Correlation Key [ "
+ correlationKey
+ "].");
}
}
MessageGroup messageGroup = messageStore.getMessageGroup(correlationKey);
if (this.sequenceAware) {
messageGroup = new SequenceAwareMessageGroup(messageGroup);
}
if (!messageGroup.isComplete() && messageGroup.canAdd(message)) {
if (logger.isTraceEnabled()) {
logger.trace("Adding message to group [ " + messageGroup + "]");
}
messageGroup = this.store(correlationKey, message);
if (releaseStrategy.canRelease(messageGroup)) {
Collection<Message<?>> completedMessages = null;
try {
completedMessages = this.completeGroup(message, correlationKey, messageGroup);
} finally {
// Always clean up even if there was an exception
// processing messages
this.afterRelease(messageGroup, completedMessages);
}
} else {
scheduleGroupToForceComplete(messageGroup);
}
} else {
discardMessage(message);
}
} finally {
lock.unlock();
}
}
private void scan() throws OperationFailedException {
try {
scanLock.lockInterruptibly();
} catch (InterruptedException ie) {
Thread.currentThread().interrupt();
return;
}
try {
if (scanEnabled) { // confirm the scan is still wanted
log.tracef(
"Scanning directory %s for deployment content changes",
deploymentDir.getAbsolutePath());
final List<ModelNode> updates = new ArrayList<ModelNode>();
Map<String, File> foundDeployed = new HashMap<String, File>();
Set<String> newlyAdded = new HashSet<String>();
Set<String> registeredDeployments = getDeploymentNames();
scanDirectory(deploymentDir, updates, foundDeployed, newlyAdded, registeredDeployments);
// Add remove actions to the plan for anything we count as
// deployed that we didn't find on the scan
Set<String> toRemove = new HashSet<String>(deployed);
toRemove.removeAll(foundDeployed.keySet());
toRemove.removeAll(newlyAdded); // in case user removed the marker and added replacement
for (String missing : toRemove) {
updates.add(getUndeployOperation(missing));
updates.add(getRemoveOperation(missing));
}
if (updates.size() > 0) {
if (log.isDebugEnabled()) {
for (ModelNode update : updates) {
log.debugf("Deployment scan of [%s] found update action [%s]", deploymentDir, update);
}
}
Operation composite = getCompositeUpdate(updates);
ModelNode results = serverController.execute(composite);
// System.out.println(composite);
// System.out.println(results);
// FIXME deal with result
}
// Throw away any found marker files that we didn't already know about
Set<String> validFinds = cleanSpuriousMarkerFiles(foundDeployed);
validFinds.addAll(newlyAdded);
this.deployed = validFinds;
log.tracef("Scan complete");
}
} finally {
scanLock.unlock();
}
}
/**
* Gets new connection listener if necessary instance with transaction. This method is package
* protected beacause it is intended only for test case use. Please don't use it in your
* production code.
*
* @param trackByTransaction transaction instance
* @param mcp pool instance
* @param subject subject instance
* @param cri connection request info
* @return connection listener instance
* @throws ResourceException ResourceException
*/
ConnectionListener getTransactionNewConnection(
Transaction trackByTransaction,
ManagedConnectionPool mcp,
Subject subject,
ConnectionRequestInfo cri)
throws ResourceException {
// Need a new one for this transaction
// This must be done outside the tx local lock, otherwise
// the tx timeout won't work and get connection can do a lot of other work
// with many opportunities for deadlocks.
// Instead we do a double check after we got the transaction to see
// whether another thread beat us to the punch.
ConnectionListener cl = mcp.getConnection(subject, cri);
if (trace)
log.tracef(
"Got connection from pool tracked by transaction=%s tx=%s", cl, trackByTransaction);
TransactionSynchronizationRegistry tsr = getTransactionSynchronizationRegistry();
Lock lock = getLock();
try {
lock.lockInterruptibly();
} catch (InterruptedException ie) {
Thread.interrupted();
throw new ResourceException(bundle.unableObtainLock(), ie);
}
try {
// Check we weren't racing with another transaction
ConnectionListener other = (ConnectionListener) tsr.getResource(mcp);
if (other != null) {
mcp.returnConnection(cl, false);
if (trace)
log.tracef(
"Another thread already got a connection tracked by transaction=%s tx=%s",
other, trackByTransaction);
cl = other;
}
// This is the connection for this transaction
cl.setTrackByTx(true);
tsr.putResource(mcp, cl);
if (trace)
log.tracef(
"Using connection from pool tracked by transaction=%s tx=%s", cl, trackByTransaction);
return cl;
} finally {
lock.unlock();
}
}
public void insert(Thread thread) throws InterruptedException {
lock.lockInterruptibly(); // 注意，如果需要正确中断等待锁的线程，必须将获取锁放在外面，然后将InterruptedException抛出
try {
System.out.println(thread.getName() + "得到了锁");
long startTime = System.currentTimeMillis();
for (; ; ) {
if (System.currentTimeMillis() - startTime >= Integer.MAX_VALUE) break;
// 插入数据
}
} finally {
System.out.println(Thread.currentThread().getName() + "执行finally");
lock.unlock();
System.out.println(thread.getName() + "释放了锁");
}
}
protected void forceComplete(MessageGroup group) {
Object correlationKey = group.getGroupId();
// UUIDConverter is no-op if already converted
Lock lock = this.lockRegistry.obtain(UUIDConverter.getUUID(correlationKey).toString());
boolean removeGroup = true;
try {
lock.lockInterruptibly();
try {
ScheduledFuture<?> scheduledFuture =
this.expireGroupScheduledFutures.remove(UUIDConverter.getUUID(correlationKey));
if (scheduledFuture != null) {
boolean canceled = scheduledFuture.cancel(false);
if (canceled && logger.isDebugEnabled()) {
logger.debug("Cancel 'forceComplete' scheduling for MessageGroup [ " + group + "].");
}
}
MessageGroup groupNow = group;
/*
* If the group argument is not already complete,
* re-fetch it because it might have changed while we were waiting on
* its lock. If the last modified timestamp changed, defer the completion
* because the selection condition may have changed such that the group
* would no longer be eligible. If the timestamp changed, it's a completely new
* group and should not be reaped on this cycle.
*
* If the group argument is already complete, do not re-fetch.
* Note: not all message stores provide a direct reference to its internal
* group so the initial 'isComplete()` will only return true for those stores if
* the group was already complete at the time of its selection as a candidate.
*
* If the group is marked complete, only consider it
* for reaping if it's empty (and both timestamps are unaltered).
*/
if (!group.isComplete()) {
groupNow = this.messageStore.getMessageGroup(correlationKey);
}
long lastModifiedNow = groupNow.getLastModified();
int groupSize = groupNow.size();
if ((!groupNow.isComplete() || groupSize == 0)
&& group.getLastModified() == lastModifiedNow
&& group.getTimestamp() == groupNow.getTimestamp()) {
if (groupSize > 0) {
if (releaseStrategy.canRelease(groupNow)) {
completeGroup(correlationKey, groupNow);
} else {
expireGroup(correlationKey, groupNow);
}
if (!this.expireGroupsUponTimeout) {
afterRelease(groupNow, groupNow.getMessages(), true);
removeGroup = false;
}
} else {
/*
* By default empty groups are removed on the same schedule as non-empty
* groups. A longer timeout for empty groups can be enabled by
* setting minimumTimeoutForEmptyGroups.
*/
removeGroup =
lastModifiedNow <= (System.currentTimeMillis() - this.minimumTimeoutForEmptyGroups);
if (removeGroup && logger.isDebugEnabled()) {
logger.debug("Removing empty group: " + correlationKey);
}
}
} else {
removeGroup = false;
if (logger.isDebugEnabled()) {
logger.debug(
"Group expiry candidate ("
+ correlationKey
+ ") has changed - it may be reconsidered for a future expiration");
}
}
} catch (MessageDeliveryException e) {
removeGroup = false;
if (logger.isDebugEnabled()) {
logger.debug(
"Group expiry candidate ("
+ correlationKey
+ ") has been affected by MessageDeliveryException - "
+ "it may be reconsidered for a future expiration one more time");
}
throw e;
} finally {
try {
if (removeGroup) {
this.remove(group);
}
} finally {
lock.unlock();
}
}
} catch (InterruptedException ie) {
Thread.currentThread().interrupt();
logger.debug("Thread was interrupted while trying to obtain lock");
}
}
@Override
public void lockInterruptibly() throws InterruptedException {
wrapped.lockInterruptibly();
}
/**
* Acquire the given lock interruptibly, holding a reference to it for cleanup on thread
* termination.
*
* @param lock the lock to acquire, released on thread termination
* @throws InterruptedException if the lock acquisition is interrupted
*/
public void lockInterruptibly(Lock lock) throws InterruptedException {
assert Thread.currentThread() == getNativeThread();
lock.lockInterruptibly();
heldLocks.add(lock);
}
/** This method isn't private solely to allow a unit test in the same package to call it */
void scan() {
try {
scanLock.lockInterruptibly();
} catch (InterruptedException ie) {
Thread.currentThread().interrupt();
return;
}
try {
if (scanEnabled) { // confirm the scan is still wanted
log.tracef(
"Scanning directory %s for deployment content changes",
deploymentDir.getAbsolutePath());
List<ScannerTask> scannerTasks = new ArrayList<ScannerTask>();
final Set<String> registeredDeployments = getDeploymentNames();
final Set<String> toRemove = new HashSet<String>(deployed.keySet());
scanDirectory(deploymentDir, scannerTasks, registeredDeployments, toRemove);
// Add remove actions to the plan for anything we count as
// deployed that we didn't find on the scan
for (String missing : toRemove) {
// TODO -- minor -- this assumes the deployment was in the root deploymentDir,
// not a child dir, and therefore puts the '.undeploying' file there
File parent = deploymentDir;
scannerTasks.add(new UndeployTask(missing, parent));
}
if (scannerTasks.size() > 0) {
List<ModelNode> updates = new ArrayList<ModelNode>(scannerTasks.size());
for (ScannerTask task : scannerTasks) {
final ModelNode update = task.getUpdate();
if (log.isDebugEnabled()) {
log.debugf("Deployment scan of [%s] found update action [%s]", deploymentDir, update);
}
updates.add(update);
}
while (!updates.isEmpty()) {
ModelNode composite = getCompositeUpdate(updates);
final ModelNode results =
serverController.execute(OperationBuilder.Factory.create(composite).build());
final List<Property> resultList = results.get(RESULT).asPropertyList();
final List<ModelNode> toRetry = new ArrayList<ModelNode>();
final List<ScannerTask> retryTasks = new ArrayList<ScannerTask>();
for (int i = 0; i < resultList.size(); i++) {
final ModelNode result = resultList.get(i).getValue();
final ScannerTask task = scannerTasks.get(i);
final ModelNode outcome = result.get(OUTCOME);
if (outcome.isDefined() && SUCCESS.equals(outcome.asString())) {
task.handleSuccessResult();
} else if (outcome.isDefined() && CANCELLED.equals(outcome.asString())) {
toRetry.add(updates.get(i));
retryTasks.add(task);
} else {
task.handleFailureResult(result);
}
}
updates = toRetry;
scannerTasks = retryTasks;
}
}
log.tracef("Scan complete");
}
} finally {
scanLock.unlock();
}
}
