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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 "TxReplicator.h"
#include "qpid/broker/Broker.h"
#include "qpid/broker/Connection.h"
#include "qpid/broker/Queue.h"
#include "qpid/broker/QueueRegistry.h"
#include "qpid/log/Statement.h"
#include <boost/bind.hpp>
namespace qpid {
namespace ha {
using sys::Mutex;
using boost::bind;
RemoteBackup::RemoteBackup(
const BrokerInfo& info, broker::Connection* c, const LogPrefix& lp
) : logPrefix(lp), brokerInfo(info), replicationTest(NONE),
started(false), connection(c), reportedReady(false)
{
std::ostringstream oss;
oss << "Remote backup at " << info << ": ";
logPrefix = oss.str();
}
RemoteBackup::~RemoteBackup() {
// Don't cancel here, cancel must be called explicitly in a locked context
// where we know the connection pointer is still good.
}
void RemoteBackup::cancel() {
QPID_LOG(debug, logPrefix << "Cancelled " << (connection? "connected":"disconnected")
<< " backup: " << brokerInfo);
for (GuardMap::iterator i = guards.begin(); i != guards.end(); ++i)
i->second->cancel();
guards.clear();
if (connection) {
connection->abort();
connection = 0;
}
}
bool RemoteBackup::isReady() {
return started && connection && catchupQueues.empty();
}
void RemoteBackup::catchupQueue(const QueuePtr& q, bool createGuard) {
if (replicationTest.getLevel(*q) == ALL) {
QPID_LOG(debug, logPrefix << "Catch-up queue"
<< (createGuard ? " and guard" : "") << ": " << q->getName());
catchupQueues.insert(q);
if (createGuard) guards[q].reset(new QueueGuard(*q, brokerInfo, logPrefix.prePrefix));
}
}
RemoteBackup::GuardPtr RemoteBackup::guard(const QueuePtr& q) {
GuardMap::iterator i = guards.find(q);
GuardPtr guard;
if (i != guards.end()) {
guard = i->second;
guards.erase(i);
}
return guard;
}
void RemoteBackup::ready(const QueuePtr& q) {
catchupQueues.erase(q);
}
// Called via BrokerObserver::queueCreate and from catchupQueue
void RemoteBackup::queueCreate(const QueuePtr& q) {
if (replicationTest.getLevel(*q) == ALL)
guards[q].reset(new QueueGuard(*q, brokerInfo, logPrefix.prePrefix));
}
// Called via BrokerObserver
void RemoteBackup::queueDestroy(const QueuePtr& q) {
catchupQueues.erase(q);
GuardMap::iterator i = guards.find(q);
if (i != guards.end()) {
i->second->cancel();
guards.erase(i);
}
}
bool RemoteBackup::reportReady() {
if (!reportedReady && isReady()) {
if (catchupQueues.empty()) QPID_LOG(debug, logPrefix << "Caught up.");
reportedReady = true;
return true;
}
return false;
}
}} // namespace qpid::ha
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