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diff --git a/qpid/cpp/src/qpid/ha/HaBroker.h b/qpid/cpp/src/qpid/ha/HaBroker.h
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+++ b/qpid/cpp/src/qpid/ha/HaBroker.h
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+#ifndef QPID_HA_BROKER_H
+#define QPID_HA_BROKER_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 "BrokerInfo.h"
+#include "Membership.h"
+#include "types.h"
+#include "LogPrefix.h"
+#include "Settings.h"
+#include "qpid/Url.h"
+#include "FailoverExchange.h"
+#include "qpid/sys/Mutex.h"
+#include "qmf/org/apache/qpid/ha/HaBroker.h"
+#include "qpid/management/Manageable.h"
+#include "qpid/types/Variant.h"
+#include <set>
+#include <boost/shared_ptr.hpp>
+
+namespace qpid {
+
+namespace types {
+class Variant;
+}
+
+namespace broker {
+class Broker;
+class Queue;
+}
+namespace framing {
+class FieldTable;
+}
+
+namespace ha {
+class Backup;
+class ConnectionObserver;
+class Primary;
+class Role;
+class QueueReplicator;
+
+/**
+ * HA state and actions associated with a HA broker. Holds all the management info.
+ *
+ * THREAD SAFE: may be called in arbitrary broker IO or timer threads.
+
+ * NOTE: HaBroker and Role subclasses follow this lock hierarchy:
+ * - HaBroker MUST NOT hold its own lock across calls Role subclasses.
+ * - Role subclasses MAY hold their locks accross calls to HaBroker.
+ */
+class HaBroker : public management::Manageable
+{
+  public:
+    /** HaBroker is constructed during earlyInitialize */
+    HaBroker(broker::Broker&, const Settings&);
+    ~HaBroker();
+
+    /** Called during plugin initialization */
+    void initialize();
+
+    // Implement Manageable.
+    qpid::management::ManagementObject::shared_ptr GetManagementObject() const { return mgmtObject; }
+    management::Manageable::status_t ManagementMethod (
+        uint32_t methodId, management::Args& args, std::string& text);
+
+    broker::Broker& getBroker() { return broker; }
+    const Settings& getSettings() const { return settings; }
+    boost::shared_ptr<Role> getRole() const {return role; }
+
+    /** Shut down the broker because of a critical error. */
+    void shutdown(const std::string& message);
+
+    BrokerStatus getStatus() const;
+    boost::shared_ptr<ConnectionObserver> getObserver() { return observer; }
+
+    BrokerInfo getBrokerInfo() const { return membership.getSelf(); }
+    Membership& getMembership() { return membership; }
+    types::Uuid getSystemId() const { return systemId; }
+
+    void setAddress(const Address&); // set self address from a self-connection
+
+    boost::shared_ptr<QueueReplicator> findQueueReplicator(const std::string& queueName);
+
+    /** Authenticated user ID for queue create/delete */
+    std::string getUserId() const { return userId; }
+
+    /** logPrefix is thread safe and used by other classes (Membership) */
+    LogPrefix logPrefix;
+
+  private:
+    class BrokerObserver;
+
+    void setPublicUrl(const Url&);
+    void setBrokerUrl(const Url&);
+    void updateClientUrl(sys::Mutex::ScopedLock&);
+
+    std::vector<Url> getKnownBrokers() const;
+
+    // Immutable members
+    const types::Uuid systemId;
+    const Settings settings;
+    const std::string userId;
+
+    // Member variables protected by lock
+    mutable sys::Mutex lock;
+    Url publicUrl, brokerUrl;
+    std::vector<Url> knownBrokers;
+
+    // Independently thread-safe member variables
+    broker::Broker& broker;
+    qmf::org::apache::qpid::ha::HaBroker::shared_ptr mgmtObject;
+    boost::shared_ptr<ConnectionObserver> observer; // Used by Backup and Primary
+    boost::shared_ptr<Role> role;
+    Membership membership;
+    boost::shared_ptr<FailoverExchange> failoverExchange;
+};
+}} // namespace qpid::ha
+
+#endif  /*!QPID_HA_BROKER_H*/