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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 "Event.h"
#include "NoOpConnectionOutputHandler.h"
#include "ClusterMap.h"
#include "qpid/broker/Broker.h"
#include "qpid/sys/PollableQueue.h"
#include "qpid/sys/Monitor.h"
#include "qpid/framing/AMQP_AllOperations.h"
#include "qpid/Url.h"
#include <boost/intrusive_ptr.hpp>
#include <vector>
namespace qpid {
namespace cluster {
class Connection;
/**
* Connection to the cluster.
* Keeps cluster membership data.
*/
class Cluster : private Cpg::Handler
{
public:
/**
* 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();
void insert(const boost::intrusive_ptr<Connection>&); // Insert a local connection
void erase(ConnectionId); // Erase a connection.
/** Get the URLs of current cluster members. */
std::vector<Url> getUrls() const;
/** Number of members in the cluster. */
size_t size() const;
bool empty() const { return size() == 0; }
/** Send to the cluster */
void mcastControl(const framing::AMQBody& controlBody, Connection* cptr);
void mcastBuffer(const char*, size_t, const ConnectionId&);
void mcastEvent(const Event& e);
/** Leave the cluster */
void leave();
void dumpRequest(const MemberId&, const std::string& url);
void dumpError(const MemberId& dumper, const MemberId& dumpee);
void ready(const MemberId&, const std::string& url);
void mapInit(const framing::FieldTable& members,
const framing::FieldTable& dumpees,
const framing::FieldTable& dumps);
MemberId getSelf() const { return self; }
void stall();
void ready();
void shutdown();
broker::Broker& getBroker();
private:
typedef std::map<ConnectionId, boost::intrusive_ptr<cluster::Connection> > ConnectionMap;
typedef sys::PollableQueue<Event> EventQueue;
enum State {
DISCARD, // Discard updates up to catchup point.
HAVE_DUMP, // Received state dump, waiting for catchup point.
CATCHUP, // Stalled at catchup point, waiting for dump.
DUMPING, // Stalled while sending a state dump.
READY // Normal processing.
};
void connectionEvent(const Event&);
/** CPG deliver callback. */
void deliver(
cpg_handle_t /*handle*/,
struct cpg_name *group,
uint32_t /*nodeid*/,
uint32_t /*pid*/,
void* /*msg*/,
int /*msg_len*/);
/** CPG config change callback */
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*/
);
/** Callback to dispatch CPG events. */
void dispatch(sys::DispatchHandle&);
/** Callback if CPG fd is disconnected. */
void disconnect(sys::DispatchHandle&);
void handleMethod(MemberId from, cluster::Connection* connection, framing::AMQMethodBody& method);
boost::intrusive_ptr<cluster::Connection> getConnection(const ConnectionId&);
void dumpTo(const Url&);
void dumpError(const MemberId&, const Url&, const char* msg);
mutable sys::Monitor lock; // Protect access to members.
broker::Broker& broker;
boost::shared_ptr<sys::Poller> poller;
Cpg cpg;
Cpg::Name name;
Url url;
ClusterMap map;
MemberId self;
ConnectionMap connections;
NoOpConnectionOutputHandler shadowOut;
sys::DispatchHandle cpgDispatchHandle;
EventQueue connectionEventQueue;
State state;
};
}} // namespace qpid::cluster
#endif /*!QPID_CLUSTER_CLUSTER_H*/
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