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diff --git a/cpp/src/qpid/cluster/ClusterHandler.h b/cpp/src/qpid/cluster/ClusterHandler.h
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+++ b/cpp/src/qpid/cluster/ClusterHandler.h
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+#ifndef QPID_CLUSTER_CLUSTERHANDLER_H
+#define QPID_CLUSTER_CLUSTERHANDLER_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 "Cpg.h"
+#include "types.h"
+
+namespace qpid {
+
+namespace framing { class AMQFrame; }
+
+namespace cluster {
+
+class Cluster;
+class Event;
+
+/**
+ * Interface for handing cluster events.
+ * Implementations provide different behavior for different states of a member..
+ */
+class ClusterHandler
+{
+  public:
+    ClusterHandler(Cluster& c);
+    virtual ~ClusterHandler();
+
+    virtual void update(const MemberId&, const framing::FieldTable& members, uint64_t dumping) = 0;
+    virtual void dumpRequest(const MemberId&, const std::string& url) = 0;
+    virtual void ready(const MemberId&, const std::string& url) = 0;
+
+    virtual void deliver(Event& e) = 0; // Deliver a connection event.
+
+    virtual void configChange(cpg_address *current, int nCurrent,
+                              cpg_address *left, int nLeft,
+                              cpg_address *joined, int nJoined) = 0;
+
+    bool invoke(const MemberId&, framing::AMQFrame& f);
+
+  protected:
+    Cluster& cluster;
+};
+
+}} // namespace qpid::cluster
+
+#endif  /*!QPID_CLUSTER_CLUSTERHANDLER_H*/