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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 "Event.h"
#include "HaBroker.h"
#include "Primary.h"
#include "PrimaryTxObserver.h"
#include "QueueGuard.h"
#include "RemoteBackup.h"
#include "ReplicatingSubscription.h"
#include "qpid/broker/Broker.h"
#include "qpid/broker/Queue.h"
#include <boost/lexical_cast.hpp>
namespace qpid {
namespace ha {
using namespace std;
using namespace boost;
using namespace broker;
PrimaryTxObserver::PrimaryTxObserver(HaBroker& hb) :
haBroker(hb), broker(hb.getBroker()),
id(true) // FIXME aconway 2013-07-11: is UUID an appropriate TX ID?
{
logPrefix = "Primary transaction "+id.str().substr(0,8)+": ";
QPID_LOG(trace, logPrefix << "started");
pair<shared_ptr<Queue>, bool> result =
broker.getQueues().declare(
TRANSACTION_REPLICATOR_PREFIX+id.str(),
QueueSettings(/*durable*/false, /*autodelete*/true));
assert(result.second);
txQueue = result.first;
}
void PrimaryTxObserver::enqueue(const QueuePtr& q, const broker::Message& m)
{
QPID_LOG(trace, logPrefix << "enqueue: " << LogMessageId(*q, m));
enqueues[q] += m.getReplicationId();
txQueue->deliver(TxEnqueueEvent(q->getName(), m.getReplicationId()).message());
txQueue->deliver(m);
}
void PrimaryTxObserver::dequeue(
const QueuePtr& q, QueuePosition pos, ReplicationId id)
{
QPID_LOG(trace, logPrefix << "dequeue: " << LogMessageId(*q, pos, id));
txQueue->deliver(TxDequeueEvent(q->getName(), id).message());
}
void PrimaryTxObserver::deduplicate() {
shared_ptr<Primary> primary(boost::dynamic_pointer_cast<Primary>(haBroker.getRole()));
assert(primary);
// FIXME aconway 2013-07-29: need to verify which backups are *in* the transaction.
// Use cluster membership for now
BrokerInfo::Set brokers = haBroker.getMembership().getBrokers();
types::Uuid selfId = haBroker.getMembership().getSelf();
// Tell replicating subscriptions to skip IDs in the transaction.
for (BrokerInfo::Set::iterator b = brokers.begin(); b != brokers.end(); ++b) {
if (b->getSystemId() == selfId) continue;
for (QueueIdsMap::iterator q = enqueues.begin(); q != enqueues.end(); ++q)
primary->skip(b->getSystemId(), q->first, q->second);
}
}
bool PrimaryTxObserver::prepare() {
// FIXME aconway 2013-07-23: need to delay completion of prepare till all
// backups have prepared.
QPID_LOG(trace, logPrefix << "prepare");
deduplicate();
txQueue->deliver(TxPrepareEvent().message());
return true;
}
void PrimaryTxObserver::commit() {
QPID_LOG(trace, logPrefix << "commit");
txQueue->deliver(TxCommitEvent().message());
}
void PrimaryTxObserver::rollback() {
QPID_LOG(trace, logPrefix << "rollback");
txQueue->deliver(TxRollbackEvent().message());
}
}} // namespace qpid::ha
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