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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.
*/
#include "mongo/platform/basic.h"
#include "mongo/s/request_types/balance_chunk_request_type.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/db/write_concern_options.h"
#include "mongo/s/request_types/balance_chunk_request_type.h"
namespace mongo {
namespace {
const char kConfigSvrMoveChunk[] = "_configsvrMoveChunk";
const char kMaxChunkSizeBytes[] = "maxChunkSizeBytes";
const char kToShardId[] = "toShard";
const char kSecondaryThrottle[] = "secondaryThrottle";
const char kWaitForDelete[] = "waitForDelete";
const char kWaitForDeleteDeprecated[] = "_waitForDelete";
const WriteConcernOptions kMajorityWriteConcernNoTimeout(WriteConcernOptions::kMajority,
WriteConcernOptions::SyncMode::UNSET,
Seconds(15));
} // namespace
BalanceChunkRequest::BalanceChunkRequest(ChunkType chunk,
MigrationSecondaryThrottleOptions secondaryThrottle)
: _chunk(std::move(chunk)), _secondaryThrottle(std::move(secondaryThrottle)) {}
StatusWith<BalanceChunkRequest> BalanceChunkRequest::parseFromConfigCommand(const BSONObj& obj) {
auto chunkStatus = ChunkType::fromConfigBSON(obj);
if (!chunkStatus.isOK()) {
return chunkStatus.getStatus();
}
// The secondary throttle options being sent to the config server are contained within a
// sub-object on the request because they contain the writeConcern field, which when sent to the
// config server gets checked for only being w:1 or w:majoirty.
BSONObj secondaryThrottleObj;
{
BSONElement secondaryThrottleElement;
auto secondaryThrottleElementStatus =
bsonExtractTypedField(obj, kSecondaryThrottle, Object, &secondaryThrottleElement);
if (secondaryThrottleElementStatus.isOK()) {
secondaryThrottleObj = secondaryThrottleElement.Obj();
} else if (secondaryThrottleElementStatus != ErrorCodes::NoSuchKey) {
return secondaryThrottleElementStatus;
}
}
auto secondaryThrottleStatus =
MigrationSecondaryThrottleOptions::createFromCommand(secondaryThrottleObj);
if (!secondaryThrottleStatus.isOK()) {
return secondaryThrottleStatus.getStatus();
}
BalanceChunkRequest request(std::move(chunkStatus.getValue()),
std::move(secondaryThrottleStatus.getValue()));
{
Status status =
bsonExtractBooleanFieldWithDefault(obj, kWaitForDelete, false, &request._waitForDelete);
if (!status.isOK()) {
return status;
}
}
// Check for the deprecated name '_waitForDelete' 'waitForDelete' was false.
if (!request._waitForDelete) {
Status status = bsonExtractBooleanFieldWithDefault(
obj, kWaitForDeleteDeprecated, false, &request._waitForDelete);
if (!status.isOK()) {
return status;
}
}
{
long long maxChunkSizeBytes;
Status status =
bsonExtractIntegerFieldWithDefault(obj, kMaxChunkSizeBytes, 0, &maxChunkSizeBytes);
if (!status.isOK()) {
return status;
}
request._maxChunkSizeBytes = static_cast<int64_t>(maxChunkSizeBytes);
}
{
std::string toShardId;
Status status = bsonExtractStringField(obj, kToShardId, &toShardId);
if (status.isOK()) {
if (toShardId.empty()) {
return {ErrorCodes::BadValue, "To shard cannot be empty"};
}
request._toShardId = std::move(toShardId);
} else if (status != ErrorCodes::NoSuchKey) {
return status;
}
}
return request;
}
BSONObj BalanceChunkRequest::serializeToMoveCommandForConfig(
const ChunkType& chunk,
const ShardId& newShardId,
int64_t maxChunkSizeBytes,
const MigrationSecondaryThrottleOptions& secondaryThrottle,
bool waitForDelete) {
invariant(chunk.validate());
BSONObjBuilder cmdBuilder;
cmdBuilder.append(kConfigSvrMoveChunk, 1);
cmdBuilder.appendElements(chunk.toConfigBSON());
cmdBuilder.append(kToShardId, newShardId.toString());
cmdBuilder.append(kMaxChunkSizeBytes, static_cast<long long>(maxChunkSizeBytes));
{
BSONObjBuilder secondaryThrottleBuilder(cmdBuilder.subobjStart(kSecondaryThrottle));
secondaryThrottle.append(&secondaryThrottleBuilder);
secondaryThrottleBuilder.doneFast();
}
cmdBuilder.append(kWaitForDelete, waitForDelete);
cmdBuilder.append(WriteConcernOptions::kWriteConcernField,
kMajorityWriteConcernNoTimeout.toBSON());
return cmdBuilder.obj();
}
BSONObj BalanceChunkRequest::serializeToRebalanceCommandForConfig(const ChunkType& chunk) {
invariant(chunk.validate());
BSONObjBuilder cmdBuilder;
cmdBuilder.append(kConfigSvrMoveChunk, 1);
cmdBuilder.appendElements(chunk.toConfigBSON());
cmdBuilder.append(WriteConcernOptions::kWriteConcernField,
kMajorityWriteConcernNoTimeout.toBSON());
return cmdBuilder.obj();
}
} // namespace mongo
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