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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 "Cpg.h"
#include "qpid/broker/Broker.h"
#include "qpid/sys/Monitor.h"
#include "qpid/sys/Runnable.h"
#include "qpid/sys/Thread.h"
#include "qpid/log/Logger.h"
#include "qpid/Url.h"
#include <boost/optional.hpp>
#include <boost/function.hpp>
#include <map>
#include <vector>
namespace qpid { namespace cluster {
/**
* Connection to the cluster.
* Keeps cluster membership data.
*/
class Cluster : private sys::Runnable, private Cpg::Handler
{
public:
/** Details of a cluster member */
struct Member {
Member(const Url& url_=Url()) : url(url_) {}
Url url; ///< Broker address.
};
typedef std::vector<Member> MemberList;
/**
* Join a cluster.
* @param name of the cluster.
* @param url of this broker, sent to the cluster.
*/
Cluster(const std::string& name, const Url& url, broker::Broker&);
virtual ~Cluster();
// FIXME aconway 2008-01-29:
intrusive_ptr<broker::PreviewSessionManager::Observer> getObserver() { return observer; }
/** Get the current cluster membership. */
MemberList getMembers() const;
/** Number of members in the cluster. */
size_t size() const;
bool empty() const { return size() == 0; }
/** Wait for predicate(*this) to be true, up to timeout.
*@return True if predicate became true, false if timed out.
*Note the predicate may not be true after wait returns,
*all the caller can say is it was true at some earlier point.
*/
bool wait(boost::function<bool(const Cluster&)> predicate,
sys::Duration timeout=sys::TIME_INFINITE) const;
/** Send frame to the cluster */
void send(framing::AMQFrame&, framing::FrameHandler*);
private:
typedef Cpg::Id Id;
typedef std::map<Id, Member> MemberMap;
void notify(); ///< Notify cluster of my details.
void deliver(
cpg_handle_t /*handle*/,
struct cpg_name *group,
uint32_t /*nodeid*/,
uint32_t /*pid*/,
void* /*msg*/,
int /*msg_len*/);
void configChange(
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*/
);
void run();
void handleClusterFrame(Id from, framing::AMQFrame&);
mutable sys::Monitor lock;
Cpg cpg;
Cpg::Name name;
Url url;
Id self;
MemberMap members;
sys::Thread dispatcher;
boost::function<void()> callback;
intrusive_ptr<broker::PreviewSessionManager::Observer> observer;
friend std::ostream& operator <<(std::ostream&, const Cluster&);
friend std::ostream& operator <<(std::ostream&, const MemberMap::value_type&);
friend std::ostream& operator <<(std::ostream&, const MemberMap&);
};
}} // namespace qpid::cluster
#endif /*!QPID_CLUSTER_CLUSTER_H*/
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