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tightened synchronization around dispatchQueue 

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@637878 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Robert Davies 2008-03-17 13:28:06 +00:00
parent 0ff0ee3766
commit 372f69aba9
1 changed files with 25 additions and 16 deletions
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41
activemq-core/src/main/java/org/apache/activemq/broker/TransportConnection.java
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@ -112,7 +112,7 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
protected final Map<ConnectionId, ConnectionState> brokerConnectionStates;
// The broker and wireformat info that was exchanged.
protected BrokerInfo brokerInfo;
protected final List<Command> dispatchQueue = Collections.synchronizedList(new LinkedList<Command>());
protected final List<Command> dispatchQueue = new LinkedList<Command>();
protected TaskRunner taskRunner;
protected final AtomicReference<IOException> transportException = new AtomicReference<IOException>();
protected AtomicBoolean dispatchStopped = new AtomicBoolean(false);
@ -205,7 +205,9 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
* @return size of dispatch queue
*/
public int getDispatchQueueSize() {
return dispatchQueue.size();
synchronized(dispatchQueue) {
return dispatchQueue.size();
}
}
public void serviceTransportException(IOException e) {
@ -743,7 +745,9 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
if (taskRunner == null) {
dispatchSync(message);
} else {
dispatchQueue.add(message);
synchronized(dispatchQueue) {
dispatchQueue.add(message);
}
try {
taskRunner.wakeup();
} catch (InterruptedException e) {
@ -780,7 +784,7 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
sub.run();
}
}
getStatistics().getDequeues().increment();
//getStatistics().getDequeues().increment();
}
}
@ -800,11 +804,13 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
}
if (!dispatchStopped.get()) {
if (dispatchQueue.isEmpty()) {
return false;
Command command = null;
synchronized(dispatchQueue) {
if (dispatchQueue.isEmpty()) {
return false;
}
command = dispatchQueue.remove(0);
}
Command command = dispatchQueue.remove(0);
processDispatch(command);
return true;
}
@ -968,16 +974,19 @@ public class TransportConnection implements Connection, Task, CommandVisitor {
// Run the MessageDispatch callbacks so that message references get
// cleaned up.
for (Iterator<Command> iter = dispatchQueue.iterator(); iter.hasNext();) {
Command command = iter.next();
if (command.isMessageDispatch()) {
MessageDispatch md = (MessageDispatch)command;
Runnable sub = md.getTransmitCallback();
broker.postProcessDispatch(md);
if (sub != null) {
sub.run();
synchronized(dispatchQueue) {
for (Iterator<Command> iter = dispatchQueue.iterator(); iter.hasNext();) {
Command command = iter.next();
if (command.isMessageDispatch()) {
MessageDispatch md = (MessageDispatch)command;
Runnable sub = md.getTransmitCallback();
broker.postProcessDispatch(md);
if (sub != null) {
sub.run();
}
}
}
dispatchQueue.clear();
}
//
// Remove all logical connection associated with this connection