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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/chunk.h"
#include "mongo/platform/random.h"
#include "mongo/s/chunk_writes_tracker.h"
#include "mongo/util/str.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kSharding
namespace mongo {
ChunkInfo::ChunkInfo(const ChunkType& from)
: _range(from.getMin(), from.getMax()),
_maxKeyString(ShardKeyPattern::toKeyString(from.getMax())),
_shardId(from.getShard()),
_lastmod(from.getVersion()),
_history(from.getHistory()),
_jumbo(from.getJumbo()),
_writesTracker(std::make_shared<ChunkWritesTracker>()) {
uassertStatusOK(from.validate());
}
ChunkInfo::ChunkInfo(ChunkRange range,
std::string maxKeyString,
ShardId shardId,
ChunkVersion version,
std::vector<ChunkHistory> history,
bool jumbo,
std::shared_ptr<ChunkWritesTracker> writesTracker)
: _range(std::move(range)),
_maxKeyString(std::move(maxKeyString)),
_shardId(shardId),
_lastmod(std::move(version)),
_history(std::move(history)),
_jumbo(jumbo),
_writesTracker(writesTracker) {}
const ShardId& ChunkInfo::getShardIdAt(const boost::optional<Timestamp>& ts) const {
// This chunk was refreshed from FCV 3.6 config server so it doesn't have history
if (_history.empty()) {
return _shardId;
}
// If the timestamp is not provided than we return the latest shardid
if (!ts) {
invariant(_shardId == _history.front().getShard());
return _history.front().getShard();
}
for (const auto& h : _history) {
if (h.getValidAfter() <= ts) {
return h.getShard();
}
}
uasserted(ErrorCodes::StaleChunkHistory,
str::stream() << "Cannot find shardId the chunk belonged to at cluster time "
<< ts.get().toString());
}
void ChunkInfo::throwIfMovedSince(const Timestamp& ts) const {
uassert(50978, "Chunk has no history entries", !_history.empty());
const auto& latestValidAfter = _history.front().getValidAfter();
if (latestValidAfter <= ts) {
return;
}
uassert(ErrorCodes::StaleChunkHistory,
str::stream() << "Cannot find shardId the chunk belonged to at cluster time "
<< ts.toString(),
_history.back().getValidAfter() <= ts);
uasserted(ErrorCodes::MigrationConflict,
str::stream() << "Chunk has moved since timestamp: " << ts.toString()
<< ", most recently at timestamp: " << latestValidAfter.toString());
}
bool ChunkInfo::containsKey(const BSONObj& shardKey) const {
return getMin().woCompare(shardKey) <= 0 && shardKey.woCompare(getMax()) < 0;
}
std::string ChunkInfo::toString() const {
return str::stream() << ChunkType::shard() << ": " << _shardId << ", " << ChunkType::lastmod()
<< ": " << _lastmod.toString() << ", " << _range.toString();
}
void ChunkInfo::markAsJumbo() {
_jumbo = true;
}
void Chunk::throwIfMoved() const {
if (!_atClusterTime) {
return;
}
_chunkInfo.throwIfMovedSince(*_atClusterTime);
}
} // namespace mongo
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