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/**
* Copyright (C) 2017 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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/base/string_data.h"
#include "mongo/db/catalog/collection_options.h"
#include "mongo/db/client.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/repl/replication_consistency_markers.h"
#include "mongo/db/repl/replication_process.h"
#include "mongo/db/repl/rollback_gen.h"
#include "mongo/db/repl/storage_interface.h"
#include "mongo/db/service_context.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/log.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
namespace repl {
namespace {
const auto getReplicationProcess =
ServiceContext::declareDecoration<std::unique_ptr<ReplicationProcess>>();
} // namespace
ReplicationProcess* ReplicationProcess::get(ServiceContext* service) {
return getReplicationProcess(service).get();
}
ReplicationProcess* ReplicationProcess::get(ServiceContext& service) {
return getReplicationProcess(service).get();
}
ReplicationProcess* ReplicationProcess::get(OperationContext* opCtx) {
return get(opCtx->getClient()->getServiceContext());
}
void ReplicationProcess::set(ServiceContext* service, std::unique_ptr<ReplicationProcess> process) {
auto& replicationProcess = getReplicationProcess(service);
replicationProcess = std::move(process);
}
ReplicationProcess::ReplicationProcess(
StorageInterface* storageInterface,
std::unique_ptr<ReplicationConsistencyMarkers> consistencyMarkers,
std::unique_ptr<ReplicationRecovery> recovery)
: _storageInterface(storageInterface),
_consistencyMarkers(std::move(consistencyMarkers)),
_recovery(std::move(recovery)),
_rbid(kUninitializedRollbackId) {}
Status ReplicationProcess::refreshRollbackID(OperationContext* opCtx) {
stdx::lock_guard<stdx::mutex> lock(_mutex);
auto rbidResult = _storageInterface->getRollbackID(opCtx);
if (!rbidResult.isOK()) {
return rbidResult.getStatus();
}
if (kUninitializedRollbackId == _rbid) {
log() << "Rollback ID is " << rbidResult.getValue();
} else {
log() << "Rollback ID is " << rbidResult.getValue() << " (previously " << _rbid << ")";
}
_rbid = rbidResult.getValue();
return Status::OK();
}
int ReplicationProcess::getRollbackID() const {
stdx::lock_guard<stdx::mutex> lock(_mutex);
if (kUninitializedRollbackId == _rbid) {
// This may happen when serverStatus is called by an internal client before we have a chance
// to read the rollback ID from storage.
warning() << "Rollback ID is not initialized yet.";
}
return _rbid;
}
Status ReplicationProcess::initializeRollbackID(OperationContext* opCtx) {
stdx::lock_guard<stdx::mutex> lock(_mutex);
invariant(kUninitializedRollbackId == _rbid);
// Do not make any assumptions about the starting value of the rollback ID in the
// local.system.rollback.id collection other than it cannot be "kUninitializedRollbackId".
// Cache the rollback ID in _rbid to be returned the next time getRollbackID() is called.
auto initRbidSW = _storageInterface->initializeRollbackID(opCtx);
if (initRbidSW.isOK()) {
log() << "Initialized the rollback ID to " << initRbidSW.getValue();
_rbid = initRbidSW.getValue();
invariant(kUninitializedRollbackId != _rbid);
} else {
warning() << "Failed to initialize the rollback ID: " << initRbidSW.getStatus().reason();
}
return initRbidSW.getStatus();
}
Status ReplicationProcess::incrementRollbackID(OperationContext* opCtx) {
stdx::lock_guard<stdx::mutex> lock(_mutex);
auto status = _storageInterface->incrementRollbackID(opCtx);
// If the rollback ID was incremented successfully, cache the new value in _rbid to be returned
// the next time getRollbackID() is called.
if (status.isOK()) {
log() << "Incremented the rollback ID to " << status.getValue();
_rbid = status.getValue();
invariant(kUninitializedRollbackId != _rbid);
} else {
warning() << "Failed to increment the rollback ID: " << status.getStatus().reason();
}
return status.getStatus();
}
ReplicationConsistencyMarkers* ReplicationProcess::getConsistencyMarkers() {
return _consistencyMarkers.get();
}
ReplicationRecovery* ReplicationProcess::getReplicationRecovery() {
return _recovery.get();
}
} // namespace repl
} // namespace mongo
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