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+#ifndef QPID_HA_MEMBERSHIP_H
+#define QPID_HA_MEMBERSHIP_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 "types.h"
+#include "qpid/framing/Uuid.h"
+#include "qpid/log/Statement.h"
+#include "qpid/types/Variant.h"
+#include <boost/function.hpp>
+#include <set>
+#include <vector>
+#include <iosfwd>
+namespace qpid {
+namespace ha {
+
+/**
+ * Keep track of the brokers in the membership.
+ * THREAD UNSAFE: caller must serialize
+ */
+class Membership
+{
+ public:
+ Membership(const types::Uuid& self_) : self(self_) {}
+
+ void reset(const BrokerInfo& b); ///< Reset to contain just one member.
+ void add(const BrokerInfo& b);
+ void remove(const types::Uuid& id);
+ bool contains(const types::Uuid& id);
+ /** Return IDs of all backups other than self */
+ BrokerInfo::Set otherBackups() const;
+
+ void assign(const types::Variant::List&);
+ types::Variant::List asList() const;
+
+ bool get(const types::Uuid& id, BrokerInfo& result);
+
+ private:
+ types::Uuid self;
+ BrokerInfo::Map brokers;
+ friend std::ostream& operator<<(std::ostream&, const Membership&);
+};
+
+std::ostream& operator<<(std::ostream&, const Membership&);
+
+}} // namespace qpid::ha
+
+#endif /*!QPID_HA_MEMBERSHIP_H*/