1 files changed, 82 insertions, 0 deletions
diff --git a/cpp/src/qpid/broker/QueueObserver.h b/cpp/src/qpid/broker/QueueObserver.h
new file mode 100644
index 0000000000..2c9354cfe7
--- /dev/null
+++ b/cpp/src/qpid/broker/QueueObserver.h
@@ -0,0 +1,82 @@
+#ifndef QPID_BROKER_QUEUEOBSERVER_H
+#define QPID_BROKER_QUEUEOBSERVER_H
+
+/*
+ *
+ * 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.
+ *
+ */
+namespace qpid {
+namespace broker {
+
+class QueuedMessage;
+/**
+ * Interface for notifying classes who want to act as 'observers' of a
+ * queue of particular events.
+ */
+class QueueObserver
+{
+  public:
+    virtual void enqueued(const QueuedMessage&) = 0;
+    virtual void dequeued(const QueuedMessage&) = 0;
+  private:
+};
+}} // namespace qpid::broker
+
+#endif  /*!QPID_BROKER_QUEUEOBSERVER_H*/
+#ifndef QPID_BROKER_QUEUEOBSERVER_H
+#define QPID_BROKER_QUEUEOBSERVER_H
+
+/*
+ *
+ * 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.
+ *
+ */
+namespace qpid {
+namespace broker {
+
+class QueuedMessage;
+/**
+ * Interface for notifying classes who want to act as 'observers' of a
+ * queue of particular events.
+ */
+class QueueObserver
+{
+  public:
+    virtual void enqueued(const QueuedMessage&) = 0;
+    virtual void dequeued(const QueuedMessage&) = 0;
+  private:
+};
+}} // namespace qpid::broker
+
+#endif  /*!QPID_BROKER_QUEUEOBSERVER_H*/