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Diffstat (limited to 'cpp/src/qpid/ha/PrimaryTxObserver.cpp')
-rw-r--r-- | cpp/src/qpid/ha/PrimaryTxObserver.cpp | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/cpp/src/qpid/ha/PrimaryTxObserver.cpp b/cpp/src/qpid/ha/PrimaryTxObserver.cpp new file mode 100644 index 0000000000..8a8364ac22 --- /dev/null +++ b/cpp/src/qpid/ha/PrimaryTxObserver.cpp @@ -0,0 +1,104 @@ +/* + * + * 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 |