QPID-3603: Add ConfigurationObserver.

Allows plugins to observe configuration events queue create/destroy,
exchange create/destroy and bind/unbind.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@1348114 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 61 insertions, 0 deletions

diff --git a/cpp/src/qpid/broker/ConfigurationObserver.h b/cpp/src/qpid/broker/ConfigurationObserver.h
new file mode 100644
index 0000000000..701043db40
--- /dev/null
+++ b/cpp/src/qpid/broker/ConfigurationObserver.h
@@ -0,0 +1,61 @@
+#ifndef QPID_BROKER_CONFIGURATIONOBSERVER_H
+#define QPID_BROKER_CONFIGURATIONOBSERVER_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.
+ *
+ */
+
+#include <boost/shared_ptr.hpp>
+#include <string>
+
+namespace qpid {
+
+namespace framing {
+class FieldTable;
+}
+
+namespace broker {
+class Queue;
+class Exchange;
+
+
+/**
+ * Observer for changes to configuration (aka wiring)
+ */
+class ConfigurationObserver
+{
+  public:
+    virtual ~ConfigurationObserver() {}
+    virtual void queueCreate(const boost::shared_ptr<Queue>&) {}
+    virtual void queueDestroy(const boost::shared_ptr<Queue>&) {}
+    virtual void exchangeCreate(const boost::shared_ptr<Exchange>&) {}
+    virtual void exchangeDestroy(const boost::shared_ptr<Exchange>&) {}
+    virtual void bind(const boost::shared_ptr<Exchange>& ,
+                      const boost::shared_ptr<Queue>& ,
+                      const std::string& /*key*/,
+                      const framing::FieldTable& /*args*/) {}
+    virtual void unbind(const boost::shared_ptr<Exchange>&,
+                        const boost::shared_ptr<Queue>& ,
+                        const std::string& /*key*/,
+                        const framing::FieldTable& /*args*/) {}
+};
+}} // namespace qpid::broker
+
+#endif  /*!QPID_BROKER_CONFIGURATIONOBSERVER_H*/