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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 "Backup.h"
#include "ConnectionExcluder.h"
#include "HaBroker.h"
#include "Primary.h"
#include "qpid/broker/Broker.h"
#include "qpid/broker/Queue.h"
#include "qpid/framing/FieldTable.h"
#include <boost/bind.hpp>
namespace qpid {
namespace ha {
Primary* Primary::instance = 0;
Primary::Primary(HaBroker& b) :
haBroker(b), logPrefix(b),
expected(b.getSettings().expectedBackups),
unready(0), activated(false)
{
instance = this; // Let queue replicators find us.
if (expected == 0) // No need for ready check
activate(*(sys::Mutex::ScopedLock*)0); // fake lock, ok in ctor.
else {
// Set up the primary-ready check: ready when all queues have
// expected number of backups. Note clients are excluded at this point
// so dont't have to worry about changes to the set of queues.
HaBroker::QueueNames names = haBroker.getActiveBackups();
for (HaBroker::QueueNames::const_iterator i = names.begin(); i != names.end(); ++i)
{
queues[*i] = 0;
++unready;
QPID_LOG(debug, logPrefix << "Need backup of " << *i
<< ", " << unready << " unready queues");
}
if (queues.empty())
activate(*(sys::Mutex::ScopedLock*)0); // fake lock, ok in ctor.
else {
QPID_LOG(debug, logPrefix << "Waiting for " << expected
<< " backups on " << queues.size() << " queues");
// Allow backups to connect.
haBroker.getExcluder()->setBackupAllowed(true);
}
}
}
void Primary::readyReplica(const std::string& q) {
sys::Mutex::ScopedLock l(lock);
if (!activated) {
QueueCounts::iterator i = queues.find(q);
if (i != queues.end()) {
++i->second;
if (i->second == expected) --unready;
QPID_LOG(debug, logPrefix << i->second << " backups caught up on " << q
<< ", " << unready << " unready queues");
if (unready == 0) activate(l);
}
}
}
void Primary::activate(sys::Mutex::ScopedLock&) {
activated = true;
haBroker.activate();
}
}} // namespace qpid::ha
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