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+#ifndef QPID_CLIENT_FAILOVERLISTENER_H
+#define QPID_CLIENT_FAILOVERLISTENER_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 "qpid/client/ClientImportExport.h"
+#include "qpid/client/MessageListener.h"
+#include "qpid/client/Connection.h"
+#include "qpid/client/Session.h"
+#include "qpid/client/SubscriptionManager.h"
+#include "qpid/Url.h"
+#include "qpid/sys/Mutex.h"
+#include "qpid/sys/Runnable.h"
+#include "qpid/sys/Thread.h"
+#include <vector>
+
+namespace qpid {
+namespace client {
+
+
+/**
+ * Listen for updates from the amq.failover exchange.
+ *
+ * In a cluster, the amq.failover exchange provides updates whenever
+ * the cluster membership changes. This class subscribes to the
+ * failover exchange and providees the latest list of known brokers.
+ *
+ * You can also subscribe to amq.failover yourself and use
+ * FailoverListener::decode to extract a list of broker URLs from a
+ * failover exchange message.
+ */
+class QPID_CLIENT_CLASS_EXTERN FailoverListener : private MessageListener, private qpid::sys::Runnable
+{
+ public:
+ /** The name of the standard failover exchange amq.failover */
+ static QPID_CLIENT_EXTERN const std::string AMQ_FAILOVER;
+
+ /** Extract the broker list from a failover exchange message */
+ static QPID_CLIENT_EXTERN std::vector<Url> getKnownBrokers(const Message& m);
+
+ /** Subscribe to amq.failover exchange. */
+ QPID_CLIENT_EXTERN FailoverListener(Connection);
+
+ /** Subscribe to amq.failover exchange.
+ *@param useInitial If true use the connection's initial brokers as
+ * the initial value of getKnownBrokers
+ */
+ QPID_CLIENT_EXTERN FailoverListener(Connection, bool useInitial);
+
+ QPID_CLIENT_EXTERN ~FailoverListener();
+
+ /** Returns the latest list of known broker URLs. */
+ QPID_CLIENT_EXTERN std::vector<Url> getKnownBrokers() const;
+
+ private:
+ void received(Message& msg);
+ void run();
+ void init(bool);
+
+ mutable sys::Mutex lock;
+ Connection connection;
+ Session session;
+ SubscriptionManager subscriptions;
+ sys::Thread thread;
+ std::vector<Url> knownBrokers;
+};
+}} // namespace qpid::client
+
+#endif /*!QPID_CLIENT_FAILOVERLISTENER_H*/