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diff --git a/cpp/src/qpid/cluster/ConnectionInterceptor.h b/cpp/src/qpid/cluster/ConnectionInterceptor.h
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+++ b/cpp/src/qpid/cluster/ConnectionInterceptor.h
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+#ifndef QPID_CLUSTER_CONNECTIONPLUGIN_H
+#define QPID_CLUSTER_CONNECTIONPLUGIN_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 "Cluster.h"
+#include "qpid/broker/Connection.h"
+#include "qpid/sys/ConnectionOutputHandler.h"
+
+namespace qpid {
+namespace framing { class AMQFrame; }
+namespace cluster {
+
+/**
+ * Plug-in associated with broker::Connections, both local and shadow.
+ */
+class ConnectionInterceptor {
+  public:
+    ConnectionInterceptor(broker::Connection&, Cluster&,
+                          Cluster::ShadowConnectionId shadowId=Cluster::ShadowConnectionId(0,0));
+    ~ConnectionInterceptor();
+
+    // Called on self-delivery
+    void deliver(framing::AMQFrame& f);
+
+    // Called on self-delivery of my own cluster.connection-close
+    void deliverClosed();
+
+    Cluster::ShadowConnectionId getShadowId() const { return shadowId; }
+
+    bool isLocal() const { return shadowId == Cluster::ShadowConnectionId(0,0); }
+    
+  private:
+    struct NullConnectionHandler : public qpid::sys::ConnectionOutputHandler {
+        void close() {}
+        void send(framing::AMQFrame&) {}
+        void doOutput() {}
+        void activateOutput() {}
+    };
+    
+    // Functions to add to Connection extension points.
+    void received(framing::AMQFrame&);
+    void closed();
+
+    boost::function<void(framing::AMQFrame&)> receivedNext;
+    boost::function<void()> closedNext;
+
+    boost::intrusive_ptr<broker::Connection> connection;
+    Cluster& cluster;
+    NullConnectionHandler discardHandler;
+    bool isClosed;
+    Cluster::ShadowConnectionId shadowId;
+};
+
+}} // namespace qpid::cluster
+
+#endif  /*!QPID_CLUSTER_CONNECTIONPLUGIN_H*/
+