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#ifndef QPID_HA_REMOTEBACKUP_H
#define QPID_HA_REMOTEBACKUP_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 "LogPrefix.h"
#include "ReplicationTest.h"
#include "BrokerInfo.h"
#include "types.h"
#include "hash.h"
#include "qpid/sys/unordered_map.h"
#include <set>
namespace qpid {
namespace broker {
class Queue;
class QueueRegistry;
class Connection;
}
namespace ha {
class QueueGuard;
/**
* Track readiness for a remote broker.
* Creates queue guards on behalf of the remote broker to keep
* queues safe till the ReplicatingSubscription is ready.
*
* THREAD UNSAFE: Caller must serialize.
*/
class RemoteBackup
{
public:
typedef boost::shared_ptr<QueueGuard> GuardPtr;
typedef boost::shared_ptr<broker::Queue> QueuePtr;
/** Note: isReady() can be true after construction
*@param connected true if the backup is already connected.
*/
RemoteBackup(const BrokerInfo&, broker::Connection*, const LogPrefix&);
~RemoteBackup();
/** Return guard associated with a queue. Used to create ReplicatingSubscription. */
GuardPtr guard(const QueuePtr&);
/** Is the remote backup connected? */
void setConnection(broker::Connection* c) { connection = c; }
broker::Connection* getConnection() const { return connection; }
/** ReplicatingSubscription associated with queue is ready.
* Note: may set isReady()
*/
void ready(const QueuePtr& queue);
/** Called via BrokerObserver */
void queueCreate(const QueuePtr&);
/** Called via BrokerObserver. Note: may set isReady() */
void queueDestroy(const QueuePtr&);
/**@return true when all catch-up queues for this backup are ready. */
bool isReady();
/**@return true if isReady() and this is the first call to reportReady */
bool reportReady();
/**Cancel all queue guards, called if we are timed out. */
void cancel();
/** Set a catch-up queue for this backup.
*@createGuard if true create a guard immediately.
*/
void catchupQueue(const QueuePtr&, bool createGuard);
BrokerInfo getBrokerInfo() const { return brokerInfo; }
void startCatchup() { started = true; }
private:
typedef qpid::sys::unordered_map<
QueuePtr, GuardPtr, Hasher<boost::shared_ptr<broker::Queue> >
> GuardMap;
typedef std::set<QueuePtr> QueueSet;
LogPrefix2 logPrefix;
BrokerInfo brokerInfo;
ReplicationTest replicationTest;
GuardMap guards;
QueueSet catchupQueues;
bool started;
broker::Connection* connection;
bool reportedReady;
};
}} // namespace qpid::ha
#endif /*!QPID_HA_REMOTEBACKUP_H*/
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