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avoid the possibility that 2 threads could attempt to add a destination at the same time causing it to be created twice and avoid issues such as duplicate registration in JMX 

git-svn-id: https://svn.apache.org/repos/asf/incubator/activemq/trunk@434397 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
James Strachan 2006-08-24 14:01:30 +00:00
parent d4a50a7340
commit a420312a40
1 changed files with 25 additions and 17 deletions
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42
activemq-core/src/main/java/org/apache/activemq/broker/region/AbstractRegion.java
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@ -77,24 +77,32 @@ abstract public class AbstractRegion implements Region {
public Destination addDestination(ConnectionContext context, ActiveMQDestination destination) throws Exception {
log.debug("Adding destination: "+destination);
Destination dest = createDestination(context, destination);
// intercept if there is a valid interceptor defined
DestinationInterceptor destinationInterceptor = broker.getDestinationInterceptor();
if (destinationInterceptor != null) {
dest = destinationInterceptor.intercept(dest);
}
dest.start();
synchronized(destinationsMutex){
destinations.put(destination,dest);
destinationMap.put(destination,dest);
// Add all consumers that are interested in the destination.
for (Iterator iter = subscriptions.values().iterator(); iter.hasNext();) {
Subscription sub = (Subscription) iter.next();
if( sub.matches(destination) ) {
dest.addSubscription(context, sub);
synchronized (destinationsMutex) {
Destination dest = (Destination) destinations.get(destination);
if (dest != null) {
log.warn("Attempt to add destination which is already created: " + destination);
}
else {
dest = createDestination(context, destination);
// intercept if there is a valid interceptor defined
DestinationInterceptor destinationInterceptor = broker.getDestinationInterceptor();
if (destinationInterceptor != null) {
dest = destinationInterceptor.intercept(dest);
}
dest.start();
destinations.put(destination, dest);
destinationMap.put(destination, dest);
// Add all consumers that are interested in the destination.
for (Iterator iter = subscriptions.values().iterator(); iter.hasNext();) {
Subscription sub = (Subscription) iter.next();
if (sub.matches(destination)) {
dest.addSubscription(context, sub);
}
}
}
return dest;