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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kReplication
#include "mongo/platform/basic.h"
#include "mongo/db/repl/data_replicator_external_state_impl.h"
#include "mongo/base/init.h"
#include "mongo/db/repl/oplog_applier_impl.h"
#include "mongo/db/repl/oplog_buffer_blocking_queue.h"
#include "mongo/db/repl/oplog_buffer_collection.h"
#include "mongo/db/repl/oplog_buffer_proxy.h"
#include "mongo/db/repl/repl_server_parameters_gen.h"
#include "mongo/db/repl/replication_coordinator.h"
#include "mongo/db/repl/replication_coordinator_external_state.h"
#include "mongo/db/repl/replication_process.h"
#include "mongo/db/repl/storage_interface.h"
#include "mongo/logv2/log.h"
namespace mongo {
namespace repl {
namespace {
const char kCollectionOplogBufferName[] = "collection";
const char kBlockingQueueOplogBufferName[] = "inMemoryBlockingQueue";
MONGO_INITIALIZER(initialSyncOplogBuffer)(InitializerContext*) {
if ((initialSyncOplogBuffer != kCollectionOplogBufferName) &&
(initialSyncOplogBuffer != kBlockingQueueOplogBufferName)) {
return Status(ErrorCodes::BadValue,
"unsupported initial sync oplog buffer option: " + initialSyncOplogBuffer);
}
return Status::OK();
}
} // namespace
DataReplicatorExternalStateImpl::DataReplicatorExternalStateImpl(
ReplicationCoordinator* replicationCoordinator,
ReplicationCoordinatorExternalState* replicationCoordinatorExternalState)
: _replicationCoordinator(replicationCoordinator),
_replicationCoordinatorExternalState(replicationCoordinatorExternalState) {}
executor::TaskExecutor* DataReplicatorExternalStateImpl::getTaskExecutor() const {
return _replicationCoordinatorExternalState->getTaskExecutor();
}
OpTimeWithTerm DataReplicatorExternalStateImpl::getCurrentTermAndLastCommittedOpTime() {
return {_replicationCoordinator->getTerm(), _replicationCoordinator->getLastCommittedOpTime()};
}
void DataReplicatorExternalStateImpl::processMetadata(const rpc::ReplSetMetadata& replMetadata,
rpc::OplogQueryMetadata oqMetadata) {
OpTimeAndWallTime newCommitPoint = oqMetadata.getLastOpCommitted();
const bool fromSyncSource = true;
_replicationCoordinator->advanceCommitPoint(newCommitPoint, fromSyncSource);
_replicationCoordinator->processReplSetMetadata(replMetadata);
if ((oqMetadata.getPrimaryIndex() != rpc::OplogQueryMetadata::kNoPrimary) ||
(replMetadata.getPrimaryIndex() != rpc::ReplSetMetadata::kNoPrimary)) {
_replicationCoordinator->cancelAndRescheduleElectionTimeout();
}
}
bool DataReplicatorExternalStateImpl::shouldStopFetching(
const HostAndPort& source,
const rpc::ReplSetMetadata& replMetadata,
boost::optional<rpc::OplogQueryMetadata> oqMetadata) {
// Re-evaluate quality of sync target.
if (_replicationCoordinator->shouldChangeSyncSource(source, replMetadata, oqMetadata)) {
// If OplogQueryMetadata was provided, its values were used to determine if we should
// change sync sources.
if (oqMetadata) {
LOGV2(21150,
"Canceling oplog query due to OplogQueryMetadata. We have to choose a new "
"sync source. Current source: {source}, OpTime {oqMetadata_getLastOpApplied}, "
"its sync source index:{oqMetadata_getSyncSourceIndex}",
"source"_attr = source,
"oqMetadata_getLastOpApplied"_attr = oqMetadata->getLastOpApplied(),
"oqMetadata_getSyncSourceIndex"_attr = oqMetadata->getSyncSourceIndex());
} else {
LOGV2(21151,
"Canceling oplog query due to ReplSetMetadata. We have to choose a new sync "
"source. Current source: {source}, OpTime {replMetadata_getLastOpVisible}, its "
"sync source index:{replMetadata_getSyncSourceIndex}",
"source"_attr = source,
"replMetadata_getLastOpVisible"_attr = replMetadata.getLastOpVisible(),
"replMetadata_getSyncSourceIndex"_attr = replMetadata.getSyncSourceIndex());
}
return true;
}
return false;
}
std::unique_ptr<OplogBuffer> DataReplicatorExternalStateImpl::makeInitialSyncOplogBuffer(
OperationContext* opCtx) const {
if (initialSyncOplogBuffer == kCollectionOplogBufferName) {
invariant(initialSyncOplogBufferPeekCacheSize >= 0);
OplogBufferCollection::Options options;
options.peekCacheSize = std::size_t(initialSyncOplogBufferPeekCacheSize);
return std::make_unique<OplogBufferProxy>(
std::make_unique<OplogBufferCollection>(StorageInterface::get(opCtx), options));
} else {
return std::make_unique<OplogBufferBlockingQueue>();
}
}
std::unique_ptr<OplogApplier> DataReplicatorExternalStateImpl::makeOplogApplier(
OplogBuffer* oplogBuffer,
OplogApplier::Observer* observer,
ReplicationConsistencyMarkers* consistencyMarkers,
StorageInterface* storageInterface,
const OplogApplier::Options& options,
ThreadPool* writerPool) {
return std::make_unique<OplogApplierImpl>(getTaskExecutor(),
oplogBuffer,
observer,
_replicationCoordinator,
consistencyMarkers,
storageInterface,
options,
writerPool);
}
StatusWith<ReplSetConfig> DataReplicatorExternalStateImpl::getCurrentConfig() const {
return _replicationCoordinator->getConfig();
}
ReplicationCoordinator* DataReplicatorExternalStateImpl::getReplicationCoordinator() const {
return _replicationCoordinator;
}
ReplicationCoordinatorExternalState*
DataReplicatorExternalStateImpl::getReplicationCoordinatorExternalState() const {
return _replicationCoordinatorExternalState;
}
} // namespace repl
} // namespace mongo
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