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#ifndef QPID_CLUSTER_CLUSTERMAP_H
#define QPID_CLUSTER_CLUSTERMAP_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 "qpid/Url.h"
#include "qpid/framing/ClusterConnectionMembershipBody.h"
#include <boost/function.hpp>
#include <boost/optional.hpp>
#include <vector>
#include <deque>
#include <map>
#include <set>
#include <iosfwd>
namespace qpid {
namespace cluster {
typedef std::set<MemberId> MemberSet;
/**
* Map of established cluster members and joiners waiting for an update,
* along with other cluster state that must be updated.
*/
class ClusterMap {
public:
typedef std::map<MemberId, Url> Map;
typedef std::set<MemberId> Set;
static Set decode(const std::string&);
ClusterMap();
ClusterMap(const MemberId& id, const Url& url, bool isReady);
ClusterMap(const framing::FieldTable& joiners, const framing::FieldTable& members, uint64_t frameSeq);
/** Update from config change.
*@return true if member set changed.
*/
bool configChange(const std::string& addresses);
bool isJoiner(const MemberId& id) const { return joiners.find(id) != joiners.end(); }
bool isMember(const MemberId& id) const { return members.find(id) != members.end(); }
bool isAlive(const MemberId& id) const { return alive.find(id) != alive.end(); }
Url getJoinerUrl(const MemberId& id) { return getUrl(joiners, id); }
Url getMemberUrl(const MemberId& id) { return getUrl(members, id); }
/** First joiner in the cluster in ID order, target for offers */
MemberId firstJoiner() const;
/** Convert map contents to a cluster control body. */
void toMethodBody(framing::ClusterConnectionMembershipBody&) const;
size_t aliveCount() const { return alive.size(); }
size_t memberCount() const { return members.size(); }
std::vector<std::string> memberIds() const;
std::vector<Url> memberUrls() const;
Set getAlive() const;
Set getMembers() const;
bool updateRequest(const MemberId& id, const std::string& url);
/** Return non-empty Url if accepted */
boost::optional<Url> updateOffer(const MemberId& from, const MemberId& to);
/**@return true If this is a new member */
bool ready(const MemberId& id, const Url&);
/**
* Utility method to return intersection of two member sets
*/
static Set intersection(const Set& a, const Set& b);
uint64_t getFrameSeq() { return frameSeq; }
uint64_t incrementFrameSeq() { return ++frameSeq; }
private:
Url getUrl(const Map& map, const MemberId& id);
Map joiners, members;
Set alive;
uint64_t frameSeq;
friend std::ostream& operator<<(std::ostream&, const Map&);
friend std::ostream& operator<<(std::ostream&, const ClusterMap&);
};
}} // namespace qpid::cluster
#endif /*!QPID_CLUSTER_CLUSTERMAP_H*/
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