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/**
* Copyright (C) 2013 10gen 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.
*/
#pragma once
#include <boost/optional.hpp>
#include "mongo/db/ops/write_ops.h"
#include "mongo/s/chunk_version.h"
#include "mongo/s/write_ops/batched_delete_request.h"
#include "mongo/s/write_ops/batched_insert_request.h"
#include "mongo/s/write_ops/batched_update_request.h"
#include "mongo/util/net/op_msg.h"
namespace mongo {
class NamespaceString;
/**
* This class wraps the different kinds of command requests into a generically usable write
* command request.
*
* Designed to be a very thin wrapper that mimics the underlying requests exactly. Owns the
* wrapped request object once constructed.
*/
class BatchedCommandRequest {
public:
enum BatchType { BatchType_Insert, BatchType_Update, BatchType_Delete, BatchType_Unknown };
BatchedCommandRequest(BatchType batchType);
/**
* insertReq ownership is transferred to here.
*/
BatchedCommandRequest(BatchedInsertRequest* insertReq)
: _batchType(BatchType_Insert), _insertReq(insertReq) {}
/**
* updateReq ownership is transferred to here.
*/
BatchedCommandRequest(BatchedUpdateRequest* updateReq)
: _batchType(BatchType_Update), _updateReq(updateReq) {}
/**
* deleteReq ownership is transferred to here.
*/
BatchedCommandRequest(BatchedDeleteRequest* deleteReq)
: _batchType(BatchType_Delete), _deleteReq(deleteReq) {}
BSONObj toBSON() const;
void parseRequest(const OpMsgRequest& request);
std::string toString() const;
//
// Batch type accessors
//
BatchType getBatchType() const {
return _batchType;
}
BatchedInsertRequest* getInsertRequest() const;
BatchedUpdateRequest* getUpdateRequest() const;
BatchedDeleteRequest* getDeleteRequest() const;
// Index creation is also an insert, but a weird one.
bool isInsertIndexRequest() const;
bool isValidIndexRequest(std::string* errMsg) const;
const NamespaceString& getTargetingNSS() const;
//
// individual field accessors
//
bool isVerboseWC() const;
/**
* Sets the namespace for this batched request.
*/
void setNS(NamespaceString ns);
const NamespaceString& getNS() const;
std::size_t sizeWriteOps() const;
void setWriteConcern(const BSONObj& writeConcern);
bool isWriteConcernSet() const;
const BSONObj& getWriteConcern() const;
void setShardVersion(ChunkVersion shardVersion) {
_shardVersion = std::move(shardVersion);
}
bool hasShardVersion() const {
return _shardVersion.is_initialized();
}
const ChunkVersion& getShardVersion() const {
return _shardVersion.get();
}
const write_ops::WriteCommandBase& getWriteCommandBase() const;
void setWriteCommandBase(write_ops::WriteCommandBase writeCommandBase);
//
// Helpers for batch pre-processing
//
/**
* Generates a new request, the same as the old, but with insert _ids if required.
* Returns NULL if this is not an insert request or all inserts already have _ids.
*/
static BatchedCommandRequest* cloneWithIds(const BatchedCommandRequest& origCmdRequest);
private:
BatchType _batchType;
write_ops::WriteCommandBase _writeCommandBase;
std::unique_ptr<BatchedInsertRequest> _insertReq;
std::unique_ptr<BatchedUpdateRequest> _updateReq;
std::unique_ptr<BatchedDeleteRequest> _deleteReq;
boost::optional<ChunkVersion> _shardVersion;
boost::optional<BSONObj> _writeConcern;
};
/**
* Similar to above, this class wraps the write items of a command request into a generically
* usable type. Very thin wrapper, does not own the write item itself.
*
* TODO: Use in BatchedCommandRequest above
*/
class BatchItemRef {
public:
BatchItemRef(const BatchedCommandRequest* request, int itemIndex)
: _request(request), _itemIndex(itemIndex) {}
const BatchedCommandRequest* getRequest() const {
return _request;
}
int getItemIndex() const {
return _itemIndex;
}
BatchedCommandRequest::BatchType getOpType() const {
return _request->getBatchType();
}
const BSONObj& getDocument() const {
dassert(_itemIndex < static_cast<int>(_request->sizeWriteOps()));
return _request->getInsertRequest()->getDocumentsAt(_itemIndex);
}
const BatchedUpdateDocument* getUpdate() const {
dassert(_itemIndex < static_cast<int>(_request->sizeWriteOps()));
return _request->getUpdateRequest()->getUpdatesAt(_itemIndex);
}
const BatchedDeleteDocument* getDelete() const {
dassert(_itemIndex < static_cast<int>(_request->sizeWriteOps()));
return _request->getDeleteRequest()->getDeletesAt(_itemIndex);
}
BSONObj toBSON() const {
switch (getOpType()) {
case BatchedCommandRequest::BatchType_Insert:
return getDocument();
case BatchedCommandRequest::BatchType_Update:
return getUpdate()->toBSON();
default:
return getDelete()->toBSON();
}
}
private:
const BatchedCommandRequest* _request;
const int _itemIndex;
};
} // namespace mongo
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