1 files changed, 49 insertions, 0 deletions
diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/queue/QueueContext.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/queue/QueueContext.java
new file mode 100755
index 0000000000..825a85a89c
--- /dev/null
+++ b/qpid/java/broker/src/main/java/org/apache/qpid/server/queue/QueueContext.java
@@ -0,0 +1,49 @@
+/*
+ *
+ * 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 java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
+
+final class QueueContext implements AMQQueue.Context
+{
+    volatile QueueEntry _lastSeenEntry;
+    volatile QueueEntry _releasedEntry;
+
+    static final AtomicReferenceFieldUpdater<QueueContext, QueueEntry>
+            _lastSeenUpdater =
+        AtomicReferenceFieldUpdater.newUpdater
+        (QueueContext.class, QueueEntry.class, "_lastSeenEntry");
+    static final AtomicReferenceFieldUpdater<QueueContext, QueueEntry>
+            _releasedUpdater =
+        AtomicReferenceFieldUpdater.newUpdater
+        (QueueContext.class, QueueEntry.class, "_releasedEntry");
+
+    public QueueContext(QueueEntry head)
+    {
+        _lastSeenEntry = head;
+    }
+
+    public QueueEntry getLastSeenEntry()
+    {
+        return _lastSeenEntry;
+    }
+}