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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_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kWrite
#include "mongo/platform/basic.h"
#include "mongo/db/ops/update.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/write_conflict_exception.h"
#include "mongo/db/exec/update_stage.h"
#include "mongo/db/matcher/extensions_callback_real.h"
#include "mongo/db/op_observer.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.h"
#include "mongo/db/update/update_driver.h"
#include "mongo/db/update_index_data.h"
#include "mongo/util/scopeguard.h"
namespace mongo {
UpdateResult update(OperationContext* opCtx, Database* db, const UpdateRequest& request) {
invariant(db);
// Explain should never use this helper.
invariant(!request.explain());
const NamespaceString& nsString = request.getNamespaceString();
invariant(opCtx->lockState()->isCollectionLockedForMode(nsString, MODE_IX));
CollectionPtr collection;
// 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.
writeConflictRetry(opCtx, "createCollection", nsString.ns(), [&] {
collection = CollectionCatalog::get(opCtx)->lookupCollectionByNamespace(opCtx, nsString);
if (collection || !request.isUpsert()) {
return;
}
const bool userInitiatedWritesAndNotPrimary = opCtx->writesAreReplicated() &&
!repl::ReplicationCoordinator::get(opCtx)->canAcceptWritesFor(opCtx, nsString);
if (userInitiatedWritesAndNotPrimary) {
uassertStatusOK(Status(ErrorCodes::PrimarySteppedDown,
str::stream() << "Not primary while creating collection "
<< nsString << " during upsert"));
}
WriteUnitOfWork wuow(opCtx);
collection = db->createCollection(opCtx, nsString, CollectionOptions());
invariant(collection);
wuow.commit();
});
// Parse the update, get an executor for it, run the executor, get stats out.
const ExtensionsCallbackReal extensionsCallback(opCtx, &request.getNamespaceString());
ParsedUpdate parsedUpdate(opCtx, &request, extensionsCallback);
uassertStatusOK(parsedUpdate.parseRequest());
OpDebug* const nullOpDebug = nullptr;
auto exec = uassertStatusOK(
getExecutorUpdate(nullOpDebug, &collection, &parsedUpdate, boost::none /* verbosity */));
PlanExecutor::ExecState state = PlanExecutor::ADVANCED;
BSONObj image;
if (request.shouldReturnAnyDocs()) {
// At the moment, an `UpdateResult` only supports returning one pre/post image
// document. This function won't disallow multi-updates + returning pre/post images, but
// will only keep the first one. Additionally, a single call to `getNext` is sufficient for
// capturing the image.
state = exec->getNext(&image, nullptr);
}
while (state == PlanExecutor::ADVANCED) {
state = exec->getNext(nullptr, nullptr);
}
UpdateResult result = exec->getUpdateResult();
if (!image.isEmpty()) {
result.requestedDocImage = image.getOwned();
}
return result;
}
} // namespace mongo
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