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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::kSharding
#include "mongo/platform/basic.h"
#include "mongo/s/write_ops/cluster_write.h"
#include <algorithm>
#include "mongo/base/status.h"
#include "mongo/client/connpool.h"
#include "mongo/client/dbclient_cursor.h"
#include "mongo/db/lasterror.h"
#include "mongo/db/write_concern_options.h"
#include "mongo/s/balancer_configuration.h"
#include "mongo/s/catalog/type_collection.h"
#include "mongo/s/catalog_cache.h"
#include "mongo/s/chunk_writes_tracker.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/s/config_server_client.h"
#include "mongo/s/grid.h"
#include "mongo/s/shard_util.h"
#include "mongo/s/write_ops/chunk_manager_targeter.h"
#include "mongo/util/log.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
namespace {
void toBatchError(const Status& status, BatchedCommandResponse* response) {
response->clear();
response->setStatus(status);
dassert(response->isValid(NULL));
}
} // namespace
void ClusterWriter::write(OperationContext* opCtx,
const BatchedCommandRequest& request,
BatchWriteExecStats* stats,
BatchedCommandResponse* response) {
const NamespaceString& nss = request.getNS();
LastError::Disabled disableLastError(&LastError::get(opCtx->getClient()));
// Config writes and shard writes are done differently
if (nss.db() == NamespaceString::kAdminDb) {
Grid::get(opCtx)->catalogClient()->writeConfigServerDirect(opCtx, request, response);
} else {
{
ChunkManagerTargeter targeter(request.getNS());
Status targetInitStatus = targeter.init(opCtx);
if (!targetInitStatus.isOK()) {
toBatchError(targetInitStatus.withContext(
str::stream()
<< "unable to initialize targeter for write op for collection "
<< request.getNS().ns()),
response);
return;
}
auto swEndpoints = targeter.targetCollection();
if (!swEndpoints.isOK()) {
toBatchError(swEndpoints.getStatus().withContext(
str::stream() << "unable to target write op for collection "
<< request.getNS().ns()),
response);
return;
}
const auto& endpoints = swEndpoints.getValue();
// Handle sharded config server writes differently.
if (std::any_of(endpoints.begin(), endpoints.end(), [](const auto& it) {
return it.shardName == ShardRegistry::kConfigServerShardId;
})) {
// There should be no namespaces that partially target config servers.
invariant(endpoints.size() == 1);
// For config servers, we do direct writes.
Grid::get(opCtx)->catalogClient()->writeConfigServerDirect(
opCtx, request, response);
return;
}
BatchWriteExec::executeBatch(opCtx, targeter, request, response, stats);
}
}
}
} // namespace mongo
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