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/**
* Copyright (C) 2015 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.
*/
#include "mongo/platform/basic.h"
#include "mongo/s/chunk_version.h"
#include "mongo/base/status_with.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
namespace {
const char kVersion[] = "version";
const char kLastmod[] = "lastmod";
} // namespace
const char ChunkVersion::kShardVersionField[] = "shardVersion";
StatusWith<ChunkVersion> ChunkVersion::parseFromBSONForCommands(const BSONObj& obj) {
BSONElement versionElem;
Status status = bsonExtractField(obj, kShardVersionField, &versionElem);
if (!status.isOK())
return status;
if (versionElem.type() != Array) {
return {ErrorCodes::TypeMismatch,
str::stream() << "Invalid type " << versionElem.type()
<< " for shardVersion element. Expected an array"};
}
BSONObjIterator it(versionElem.Obj());
if (!it.more())
return {ErrorCodes::BadValue, "Unexpected empty version"};
ChunkVersion version;
// Expect the timestamp
{
BSONElement tsPart = it.next();
if (tsPart.type() != bsonTimestamp)
return {ErrorCodes::TypeMismatch,
str::stream() << "Invalid type " << tsPart.type()
<< " for version timestamp part."};
version._combined = tsPart.timestamp().asULL();
}
// Expect the epoch OID
{
BSONElement epochPart = it.next();
if (epochPart.type() != jstOID)
return {ErrorCodes::TypeMismatch,
str::stream() << "Invalid type " << epochPart.type()
<< " for version epoch part."};
version._epoch = epochPart.OID();
}
return version;
}
StatusWith<ChunkVersion> ChunkVersion::parseFromBSONForSetShardVersion(const BSONObj& obj) {
bool canParse;
const ChunkVersion chunkVersion = ChunkVersion::fromBSON(obj, kVersion, &canParse);
if (!canParse)
return {ErrorCodes::BadValue, "Unable to parse shard version"};
return chunkVersion;
}
StatusWith<ChunkVersion> ChunkVersion::parseFromBSONForChunk(const BSONObj& obj) {
bool canParse;
const ChunkVersion chunkVersion = ChunkVersion::fromBSON(obj, kLastmod, &canParse);
if (!canParse)
return {ErrorCodes::BadValue, "Unable to parse shard version"};
return chunkVersion;
}
void ChunkVersion::appendForSetShardVersion(BSONObjBuilder* builder) const {
addToBSON(*builder, kVersion);
}
void ChunkVersion::appendForCommands(BSONObjBuilder* builder) const {
builder->appendArray(kShardVersionField, toBSON());
}
void ChunkVersion::appendForChunk(BSONObjBuilder* builder) const {
addToBSON(*builder, kLastmod);
}
BSONObj ChunkVersion::toBSON() const {
BSONArrayBuilder b;
b.appendTimestamp(_combined);
b.append(_epoch);
return b.arr();
}
} // namespace mongo
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