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diff --git a/qpid/cpp/src/qpid/cluster/InitialStatusMap.h b/qpid/cpp/src/qpid/cluster/InitialStatusMap.h
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+++ b/qpid/cpp/src/qpid/cluster/InitialStatusMap.h
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+#ifndef QPID_CLUSTER_INITIALSTATUSMAP_H
+#define QPID_CLUSTER_INITIALSTATUSMAP_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 "MemberSet.h"
+#include <qpid/framing/ClusterInitialStatusBody.h>
+#include <boost/optional.hpp>
+
+namespace qpid {
+namespace cluster {
+
+/**
+ * Track status of cluster members during initialization.
+ *
+ * When a new member joins the CPG cluster, all members send an initial-status
+ * control. This map tracks those controls and provides data to make descisions
+ * about joining the cluster.
+ *
+ */
+class InitialStatusMap
+{
+  public:
+    typedef framing::ClusterInitialStatusBody Status;
+
+    InitialStatusMap(const MemberId& self, size_t size);
+    /** Process a config change. May make isResendNeeded() true. */
+    void configChange(const MemberSet& newConfig);
+    /** @return true if we need to re-send status */
+    bool isResendNeeded();
+
+    /** Process received status */
+    void received(const MemberId&, const Status& is);
+
+    /**@return true if the map has an entry for all current cluster members. */
+    bool isComplete() const;
+
+    size_t getActualSize() const { return map.size(); }
+    size_t getRequiredSize() const { return size; }
+
+    /**@return true if the map was completed by the last config change or received. */
+    bool transitionToComplete();
+    /**@pre isComplete(). @return this node's elders */
+    MemberSet getElders() const;
+    /**@pre isComplete(). @return True if there are active members of the cluster. */
+    bool isActive();
+    /**@pre isComplete(). @return True if we need to request an update. */
+    bool isUpdateNeeded();
+    /**@pre isComplete(). @return Cluster-wide cluster ID. */
+    framing::Uuid getClusterId();
+    /**@pre isComplete(). @throw Exception if there are any inconsistencies. */
+    void checkConsistent();
+
+    /** Get first config-change for this member, encoded as a string.
+     *@pre configChange has been called at least once.
+     */
+    std::string getFirstConfigStr() const;
+  private:
+    typedef std::map<MemberId, boost::optional<Status> > Map;
+    static bool notInitialized(const Map::value_type&);
+    static bool isActiveEntry(const Map::value_type&);
+    static bool hasStore(const Map::value_type&);
+
+    Map map;
+    MemberSet firstConfig;
+    MemberId self;
+    bool completed, resendNeeded;
+    size_t size;
+};
+}} // namespace qpid::cluster
+
+#endif  /*!QPID_CLUSTER_INITIALSTATUSMAP_H*/