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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/move_chunk_request.h"
#include "mongo/base/status_with.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/logger/redaction.h"
namespace mongo {
namespace {
const char kMoveChunk[] = "moveChunk";
const char kEpoch[] = "epoch";
const char kChunkVersion[] = "chunkVersion";
const char kConfigServerConnectionString[] = "configdb";
const char kFromShardId[] = "fromShard";
const char kToShardId[] = "toShard";
const char kMaxChunkSizeBytes[] = "maxChunkSizeBytes";
const char kWaitForDelete[] = "waitForDelete";
const char kWaitForDeleteDeprecated[] = "_waitForDelete";
const char kTakeDistLock[] = "takeDistLock"; // TODO: delete in 3.8
} // namespace
MoveChunkRequest::MoveChunkRequest(NamespaceString nss,
ChunkRange range,
MigrationSecondaryThrottleOptions secondaryThrottle)
: _nss(std::move(nss)),
_range(std::move(range)),
_secondaryThrottle(std::move(secondaryThrottle)) {}
StatusWith<MoveChunkRequest> MoveChunkRequest::createFromCommand(NamespaceString nss,
const BSONObj& obj) {
auto secondaryThrottleStatus = MigrationSecondaryThrottleOptions::createFromCommand(obj);
if (!secondaryThrottleStatus.isOK()) {
return secondaryThrottleStatus.getStatus();
}
auto rangeStatus = ChunkRange::fromBSON(obj);
if (!rangeStatus.isOK()) {
return rangeStatus.getStatus();
}
MoveChunkRequest request(std::move(nss),
std::move(rangeStatus.getValue()),
std::move(secondaryThrottleStatus.getValue()));
{
std::string shardStr;
Status status = bsonExtractStringField(obj, kFromShardId, &shardStr);
request._fromShardId = shardStr;
if (!status.isOK()) {
return status;
}
}
{
std::string shardStr;
Status status = bsonExtractStringField(obj, kToShardId, &shardStr);
request._toShardId = shardStr;
if (!status.isOK()) {
return status;
}
}
{
BSONElement epochElem;
Status status = bsonExtractTypedField(obj, kEpoch, BSONType::jstOID, &epochElem);
if (!status.isOK())
return status;
request._versionEpoch = epochElem.OID();
}
{
Status status =
bsonExtractBooleanFieldWithDefault(obj, kWaitForDelete, false, &request._waitForDelete);
if (!status.isOK()) {
return status;
}
}
// Check for the deprecated name '_waitForDelete' if 'waitForDelete' was false.
if (!request._waitForDelete) {
Status status = bsonExtractBooleanFieldWithDefault(
obj, kWaitForDeleteDeprecated, false, &request._waitForDelete);
if (!status.isOK()) {
return status;
}
}
{
long long maxChunkSizeBytes;
Status status = bsonExtractIntegerField(obj, kMaxChunkSizeBytes, &maxChunkSizeBytes);
if (!status.isOK()) {
return status;
}
request._maxChunkSizeBytes = static_cast<int64_t>(maxChunkSizeBytes);
}
{ // TODO: delete this block in 3.8
bool takeDistLock = false;
Status status = bsonExtractBooleanField(obj, kTakeDistLock, &takeDistLock);
if (status.isOK() && takeDistLock) {
return Status{ErrorCodes::IncompatibleShardingConfigVersion,
str::stream()
<< "Request received from an older, incompatible mongodb version"};
}
}
return request;
}
void MoveChunkRequest::appendAsCommand(BSONObjBuilder* builder,
const NamespaceString& nss,
ChunkVersion chunkVersion,
const ConnectionString& configServerConnectionString,
const ShardId& fromShardId,
const ShardId& toShardId,
const ChunkRange& range,
int64_t maxChunkSizeBytes,
const MigrationSecondaryThrottleOptions& secondaryThrottle,
bool waitForDelete) {
invariant(builder->asTempObj().isEmpty());
invariant(nss.isValid());
builder->append(kMoveChunk, nss.ns());
chunkVersion.appendToCommand(builder); // 3.4 shard compatibility
builder->append(kEpoch, chunkVersion.epoch());
// config connection string is included for 3.4 shard compatibility
builder->append(kConfigServerConnectionString, configServerConnectionString.toString());
builder->append(kFromShardId, fromShardId.toString());
builder->append(kToShardId, toShardId.toString());
range.append(builder);
builder->append(kMaxChunkSizeBytes, static_cast<long long>(maxChunkSizeBytes));
secondaryThrottle.append(builder);
builder->append(kWaitForDelete, waitForDelete);
builder->append(kTakeDistLock, false);
}
bool MoveChunkRequest::operator==(const MoveChunkRequest& other) const {
if (_nss != other._nss)
return false;
if (_fromShardId != other._fromShardId)
return false;
if (_toShardId != other._toShardId)
return false;
if (_range != other._range)
return false;
if (_waitForDelete != other._waitForDelete)
return false;
return true;
}
bool MoveChunkRequest::operator!=(const MoveChunkRequest& other) const {
return !(*this == other);
}
std::string MoveChunkRequest::toString() const {
std::stringstream ss;
ss << "ns: " << getNss().ns() << ", " << redact(ChunkRange(getMinKey(), getMaxKey()).toString())
<< ", fromShard: " << getFromShardId() << ", toShard: " << getToShardId();
return ss.str();
}
} // namespace mongo
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