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//@file update.cpp
/**
* Copyright (C) 2008-2014 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::kWrite
#include "mongo/platform/basic.h"
#include "mongo/db/ops/update.h"
#include "mongo/client/dbclientinterface.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/catalog/database_holder.h"
#include "mongo/db/client.h"
#include "mongo/db/clientcursor.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/concurrency/write_conflict_exception.h"
#include "mongo/db/exec/update.h"
#include "mongo/db/op_observer.h"
#include "mongo/db/ops/update_driver.h"
#include "mongo/db/ops/update_lifecycle.h"
#include "mongo/db/query/explain.h"
#include "mongo/db/query/get_executor.h"
#include "mongo/db/query/plan_summary_stats.h"
#include "mongo/db/repl/repl_client_info.h"
#include "mongo/db/repl/replication_coordinator_global.h"
#include "mongo/db/update_index_data.h"
#include "mongo/util/log.h"
#include "mongo/util/scopeguard.h"
namespace mongo {
UpdateResult update(OperationContext* txn,
Database* db,
const UpdateRequest& request,
OpDebug* opDebug) {
invariant(db);
// Explain should never use this helper.
invariant(!request.isExplain());
auto client = txn->getClient();
auto lastOpAtOperationStart = repl::ReplClientInfo::forClient(client).getLastOp();
ScopeGuard lastOpSetterGuard = MakeObjGuard(repl::ReplClientInfo::forClient(client),
&repl::ReplClientInfo::setLastOpToSystemLastOpTime,
txn);
const NamespaceString& nsString = request.getNamespaceString();
Collection* collection = db->getCollection(nsString.ns());
// If this is the local database, don't set last op.
if (db->name() == "local") {
lastOpSetterGuard.Dismiss();
}
// The update stage does not create its own collection. As such, if the update is
// an upsert, create the collection that the update stage inserts into beforehand.
if (!collection && request.isUpsert()) {
// We have to have an exclusive lock on the db to be allowed to create the collection.
// Callers should either get an X or create the collection.
const Locker* locker = txn->lockState();
invariant(locker->isW() ||
locker->isLockHeldForMode(ResourceId(RESOURCE_DATABASE, nsString.db()), MODE_X));
MONGO_WRITE_CONFLICT_RETRY_LOOP_BEGIN {
ScopedTransaction transaction(txn, MODE_IX);
Lock::DBLock lk(txn->lockState(), nsString.db(), MODE_X);
const bool userInitiatedWritesAndNotPrimary = txn->writesAreReplicated() &&
!repl::getGlobalReplicationCoordinator()->canAcceptWritesFor(nsString);
if (userInitiatedWritesAndNotPrimary) {
uassertStatusOK(Status(ErrorCodes::NotMaster,
str::stream() << "Not primary while creating collection "
<< nsString.ns() << " during upsert"));
}
WriteUnitOfWork wuow(txn);
collection = db->createCollection(txn, nsString.ns(), CollectionOptions());
invariant(collection);
wuow.commit();
}
MONGO_WRITE_CONFLICT_RETRY_LOOP_END(txn, "createCollection", nsString.ns());
}
// Parse the update, get an executor for it, run the executor, get stats out.
ParsedUpdate parsedUpdate(txn, &request);
uassertStatusOK(parsedUpdate.parseRequest());
std::unique_ptr<PlanExecutor> exec =
uassertStatusOK(getExecutorUpdate(txn, opDebug, collection, &parsedUpdate));
uassertStatusOK(exec->executePlan());
if (repl::ReplClientInfo::forClient(client).getLastOp() != lastOpAtOperationStart) {
// If this operation has already generated a new lastOp, don't bother setting it here.
// No-op updates will not generate a new lastOp, so we still need the guard to fire in that
// case.
lastOpSetterGuard.Dismiss();
}
PlanSummaryStats summaryStats;
Explain::getSummaryStats(*exec, &summaryStats);
const UpdateStats* updateStats = UpdateStage::getUpdateStats(exec.get());
UpdateStage::recordUpdateStatsInOpDebug(updateStats, opDebug);
opDebug->setPlanSummaryMetrics(summaryStats);
return UpdateStage::makeUpdateResult(updateStats);
}
BSONObj applyUpdateOperators(const BSONObj& from, const BSONObj& operators) {
UpdateDriver::Options opts;
UpdateDriver driver(opts);
Status status = driver.parse(operators);
if (!status.isOK()) {
uasserted(16838, status.reason());
}
mutablebson::Document doc(from, mutablebson::Document::kInPlaceDisabled);
status = driver.update(StringData(), &doc);
if (!status.isOK()) {
uasserted(16839, status.reason());
}
return doc.getObject();
}
} // namespace mongo
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