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diff --git a/cpp/src/qpid/cluster/ConnectionMap.h b/cpp/src/qpid/cluster/ConnectionMap.h
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+++ b/cpp/src/qpid/cluster/ConnectionMap.h
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+#ifndef QPID_CLUSTER_CONNECTIONMAP_H
+#define QPID_CLUSTER_CONNECTIONMAP_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 "types.h"
+#include "Connection.h"
+#include "ClusterMap.h"
+#include "qpid/sys/Mutex.h"
+#include <boost/intrusive_ptr.hpp>
+#include <map>
+
+namespace qpid {
+namespace cluster {
+
+/**
+ * Thread safe map of connections.
+ */
+class ConnectionMap
+{
+  public:
+    typedef boost::intrusive_ptr<cluster::Connection> ConnectionPtr;
+    typedef std::vector<ConnectionPtr> Vector;
+    
+    void insert(ConnectionId id, ConnectionPtr p) {
+        ScopedLock l(lock);
+        map.insert(Map::value_type(id,p));
+    }
+
+    void erase(ConnectionId id) {
+        ScopedLock l(lock);
+        map.erase(id);
+    }
+
+    ConnectionPtr find(ConnectionId id) const {
+        ScopedLock l(lock);
+        Map::const_iterator i = map.find(id);
+        return i == map.end() ? ConnectionPtr() : i->second;
+    }
+
+    Vector values() const {
+        Vector result(map.size());
+        std::transform(map.begin(), map.end(), result.begin(),
+                       boost::bind(&Map::value_type::second, _1));
+        return result;
+    }
+
+    void update(MemberId myId, const ClusterMap& cluster) {
+        for (Map::iterator i = map.begin(); i != map.end(); ) {
+            MemberId member = i->first.getMember();
+            if (member != myId && !cluster.isMember(member)) { 
+                i->second->left();
+                map.erase(i++);
+            } else {
+                i++;
+            }
+        }
+    }
+
+    size_t size() const { return map.size(); }
+  private:
+    typedef std::map<ConnectionId, ConnectionPtr> Map;
+    typedef sys::Mutex::ScopedLock ScopedLock;
+    
+    mutable sys::Mutex lock;
+    Map map;
+};
+
+
+}} // namespace qpid::cluster
+
+#endif  /*!QPID_CLUSTER_CONNECTIONMAP_H*/