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package org.apache.qpid.server.queue;
import org.apache.qpid.server.subscription.Subscription;
import org.apache.qpid.server.subscription.SubscriptionList;
import org.apache.qpid.server.virtualhost.VirtualHost;
import java.util.Map;
import java.util.UUID;
public abstract class OutOfOrderQueue extends SimpleAMQQueue
{
protected OutOfOrderQueue(UUID id, String name, boolean durable,
String owner, boolean autoDelete, boolean exclusive,
VirtualHost virtualHost, QueueEntryListFactory entryListFactory, Map<String, Object> arguments)
{
super(id, name, durable, owner, autoDelete, exclusive, virtualHost, entryListFactory, arguments);
}
@Override
protected void checkSubscriptionsNotAheadOfDelivery(final QueueEntry entry)
{
// check that all subscriptions are not in advance of the entry
SubscriptionList.SubscriptionNodeIterator subIter = getSubscriptionList().iterator();
while(subIter.advance() && !entry.isAcquired())
{
final Subscription subscription = subIter.getNode().getSubscription();
if(!subscription.isClosed())
{
QueueContext context = (QueueContext) subscription.getQueueContext();
if(context != null)
{
QueueEntry released = context.getReleasedEntry();
while(!entry.isAcquired() && (released == null || released.compareTo(entry) > 0))
{
if(QueueContext._releasedUpdater.compareAndSet(context,released,entry))
{
break;
}
else
{
released = context.getReleasedEntry();
}
}
}
}
}
}
}
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