1 files changed, 70 insertions, 0 deletions
diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/queue/AMQPriorityQueue.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/queue/AMQPriorityQueue.java
new file mode 100644
index 0000000000..bb6ce65d42
--- /dev/null
+++ b/qpid/java/broker/src/main/java/org/apache/qpid/server/queue/AMQPriorityQueue.java
@@ -0,0 +1,70 @@
+/*
+*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*
+*/
+package org.apache.qpid.server.queue;
+
+import org.apache.qpid.framing.AMQShortString;
+import org.apache.qpid.server.virtualhost.VirtualHost;
+import org.apache.qpid.server.subscription.SubscriptionList;
+import org.apache.qpid.server.subscription.Subscription;
+import org.apache.qpid.AMQException;
+
+public class AMQPriorityQueue extends SimpleAMQQueue
+{
+    protected AMQPriorityQueue(final AMQShortString name,
+                               final boolean durable,
+                               final AMQShortString owner,
+                               final boolean autoDelete,
+                               final VirtualHost virtualHost,
+                               int priorities)
+            throws AMQException
+    {
+        super(name, durable, owner, autoDelete, virtualHost, new PriorityQueueList.Factory(priorities));
+    }
+
+    public int getPriorities()
+    {
+        return ((PriorityQueueList) _entries).getPriorities();
+    }
+
+    @Override
+    protected void checkSubscriptionsNotAheadOfDelivery(final QueueEntry entry)
+    {
+        // check that all subscriptions are not in advance of the entry
+        SubscriptionList.SubscriptionNodeIterator subIter = _subscriptionList.iterator();
+        while(subIter.advance() && !entry.isAcquired())
+        {
+            final Subscription subscription = subIter.getNode().getSubscription();
+            QueueEntry subnode = subscription.getLastSeenEntry();
+            while(subnode != null && entry.compareTo(subnode) < 0 && !entry.isAcquired())
+            {
+                if(subscription.setLastSeenEntry(subnode,entry))
+                {
+                    break;
+                }
+                else
+                {
+                    subnode = subscription.getLastSeenEntry();
+                }
+            }
+
+        }
+    }
+}