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/*
*
* 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 "RemoteBackup.h"
#include "QueueGuard.h"
#include "qpid/broker/Broker.h"
#include "qpid/broker/Queue.h"
#include "qpid/broker/QueueRegistry.h"
#include <boost/bind.hpp>
namespace qpid {
namespace ha {
using sys::Mutex;
RemoteBackup::RemoteBackup(
const BrokerInfo& info, broker::Broker& broker, ReplicationTest rt, bool cg) :
logPrefix("Primary remote backup "+info.getLogId()+": "), brokerInfo(info), replicationTest(rt),
createGuards(cg)
{
QPID_LOG(debug, logPrefix << "Guarding queues for backup broker.");
broker.getQueues().eachQueue(boost::bind(&RemoteBackup::initialQueue, this, _1));
}
RemoteBackup::~RemoteBackup() {
for (GuardMap::iterator i = guards.begin(); i != guards.end(); ++i)
i->second->cancel();
}
bool RemoteBackup::isReady() {
return initialQueues.empty();
}
void RemoteBackup::initialQueue(const QueuePtr& q) {
if (replicationTest.isReplicated(ALL, *q)) {
initialQueues.insert(q);
queueCreate(q);
}
}
RemoteBackup::GuardPtr RemoteBackup::guard(const QueuePtr& q) {
if (!createGuards) return RemoteBackup::GuardPtr();
GuardMap::iterator i = guards.find(q);
if (i == guards.end()) {
assert(0);
throw Exception(logPrefix+": Cannot find queue guard: "+q->getName());
}
GuardPtr guard = i->second;
guards.erase(i);
return guard;
}
namespace {
typedef std::set<boost::shared_ptr<broker::Queue> > QS;
struct QueueSetPrinter {
const QS& qs;
QueueSetPrinter(const QS& q) : qs(q) {}
};
std::ostream& operator<<(std::ostream& o, const QueueSetPrinter& qp) {
for (QS::const_iterator i = qp.qs.begin(); i != qp.qs.end(); ++i)
o << (*i)->getName() << " ";
return o;
}
}
void RemoteBackup::ready(const QueuePtr& q) {
initialQueues.erase(q);
QPID_LOG(debug, logPrefix << "Queue ready: " << q->getName()
<< " remaining unready: " << QueueSetPrinter(initialQueues));
if (isReady()) QPID_LOG(debug, logPrefix << "All queues ready");
}
// Called via ConfigurationObserver and from initialQueue
void RemoteBackup::queueCreate(const QueuePtr& q) {
if (createGuards && replicationTest.isReplicated(ALL, *q))
guards[q].reset(new QueueGuard(*q, brokerInfo));
}
// Called via ConfigurationObserver
void RemoteBackup::queueDestroy(const QueuePtr& q) {
initialQueues.erase(q);
GuardMap::iterator i = guards.find(q);
if (i != guards.end()) {
i->second->cancel();
guards.erase(i);
}
}
}} // namespace qpid::ha
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