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#ifndef QPID_CLUSTER_CLUSTER_H
#define QPID_CLUSTER_CLUSTER_H
/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed 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/cluster/Cpg.h"
#include "qpid/framing/FrameHandler.h"
#include "qpid/sys/Thread.h"
#include "qpid/sys/Monitor.h"
#include "qpid/sys/Runnable.h"
#include "qpid/shared_ptr.h"
#include <boost/function.hpp>
#include <boost/scoped_ptr.hpp>
#include <map>
#include <vector>
namespace qpid {
namespace broker {
class HandlerUpdater;
}
namespace cluster {
class ChannelManager;
/**
* Represents a cluster, provides access to data about members.
*
* Implements a FrameHandler that multicasts frames to the cluster.
*
* Requires a handler for frames arriving from the cluster,
* normally a ChannelManager but other handlers could be interposed
* for testing, logging etc.
*/
class Cluster : public framing::FrameHandler, private sys::Runnable {
public:
/** Details of a cluster member */
struct Member {
typedef shared_ptr<const Member> Ptr;
/** Status of a cluster member. */
enum Status {
JOIN, ///< Process joined the group.
LEAVE, ///< Process left the group cleanly.
NODEDOWN, ///< Process's node went down.
NODEUP, ///< Process's node joined the cluster.
PROCDOWN, ///< Process died without leaving.
BROKER ///< Broker details are available.
};
Member(const cpg_address&);
std::string url;
Status status;
};
typedef std::vector<Member::Ptr> MemberList;
/**
* Create a cluster object but do not joing.
* @param name of the cluster.
* @param url of this broker, sent to the cluster.
*/
Cluster(const std::string& name, const std::string& url);
~Cluster();
/** Join the cluster.
*@handler is the handler for frames arriving from the cluster.
*/
void join(framing::FrameHandler::Chain handler);
/** Multicast a frame to the cluster. */
void handle(framing::AMQFrame&);
/** Get the current cluster membership. */
MemberList getMembers() const;
/** Called when membership changes. */
void setCallback(boost::function<void()>);
/** Number of members in the cluster. */
size_t size() const;
private:
typedef Cpg::Id Id;
typedef std::map<Id, shared_ptr<Member> > MemberMap;
void run();
void notify();
void cpgDeliver(
cpg_handle_t /*handle*/,
struct cpg_name *group,
uint32_t /*nodeid*/,
uint32_t /*pid*/,
void* /*msg*/,
int /*msg_len*/);
void cpgConfigChange(
cpg_handle_t /*handle*/,
struct cpg_name */*group*/,
struct cpg_address */*members*/, int /*nMembers*/,
struct cpg_address */*left*/, int /*nLeft*/,
struct cpg_address */*joined*/, int /*nJoined*/
);
mutable sys::Monitor lock;
Cpg::Name name;
std::string url;
boost::scoped_ptr<Cpg> cpg;
Id self;
MemberMap members;
sys::Thread dispatcher;
boost::function<void()> callback;
friend std::ostream& operator <<(std::ostream&, const Cluster&);
};
}} // namespace qpid::cluster
#endif /*!QPID_CLUSTER_CLUSTER_H*/
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