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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/>.
*/
#pragma once
#include "mongo/base/disallow_copying.h"
#include "mongo/s/bson_serializable.h"
#include "mongo/s/batched_insert_request.h"
#include "mongo/s/batched_update_request.h"
#include "mongo/s/batched_delete_request.h"
namespace mongo {
/**
* 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 BSONSerializable {
MONGO_DISALLOW_COPYING(BatchedCommandRequest);
public:
enum BatchType {
BatchType_Insert, BatchType_Update, BatchType_Delete, BatchType_Unknown
};
//
// construction / destruction
//
BatchedCommandRequest( BatchType batchType );
BatchedCommandRequest( BatchedInsertRequest* insertReq ) :
_batchType( BatchType_Insert ), _insertReq( insertReq ) {
}
BatchedCommandRequest( BatchedUpdateRequest* updateReq ) :
_batchType( BatchType_Update ), _updateReq( updateReq ) {
}
BatchedCommandRequest( BatchedDeleteRequest* deleteReq ) :
_batchType( BatchType_Delete ), _deleteReq( deleteReq ) {
}
virtual ~BatchedCommandRequest() {};
/** Copies all the fields present in 'this' to 'other'. */
void cloneTo( BatchedCommandRequest* other ) const;
//
// bson serializable interface implementation
//
virtual bool isValid( std::string* errMsg ) const;
virtual BSONObj toBSON() const;
virtual bool parseBSON( const BSONObj& source, std::string* errMsg );
virtual void clear();
virtual std::string toString() const;
//
// individual field accessors
//
BatchType getBatchType() const;
BatchedInsertRequest* getInsertRequest() const;
BatchedUpdateRequest* getUpdateRequest() const;
BatchedDeleteRequest* getDeleteRequest() const;
void setNS( const StringData& collName );
void unsetNS();
bool isNSSet() const;
const std::string& getNS() const;
/**
* Write ops are BSONObjs, whose format depends on the type of request
* TODO: Should be possible to further parse these ops generically if we come up with a
* good scheme.
*/
void setWriteOps( const std::vector<BSONObj>& writeOps );
void unsetWriteOps();
bool isWriteOpsSet() const;
std::size_t sizeWriteOps() const;
std::vector<BSONObj> getWriteOps() const;
void setWriteConcern( const BSONObj& writeConcern );
void unsetWriteConcern();
bool isWriteConcernSet() const;
const BSONObj& getWriteConcern() const;
void setOrdered( bool ordered );
void unsetOrdered();
bool isOrderedSet() const;
bool getOrdered() const;
void setShardVersion( const ChunkVersion& shardVersion );
void unsetShardVersion();
bool isShardVersionSet() const;
const ChunkVersion& getShardVersion() const;
void setSession( long long session );
void unsetSession();
bool isSessionSet() const;
long long getSession() const;
private:
BatchType _batchType;
scoped_ptr<BatchedInsertRequest> _insertReq;
scoped_ptr<BatchedUpdateRequest> _updateReq;
scoped_ptr<BatchedDeleteRequest> _deleteReq;
};
/**
* 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 ) {
dassert( itemIndex < static_cast<int>( request->sizeWriteOps() ) );
}
const BatchedCommandRequest* getRequest() const {
return _request;
}
int getItemIndex() const {
return _itemIndex;
}
BatchedCommandRequest::BatchType getOpType() const {
return _request->getBatchType();
}
BSONObj getDocument() const {
return _request->getInsertRequest()->getDocumentsAt( _itemIndex );
}
const BatchedUpdateDocument* getUpdate() const {
return _request->getUpdateRequest()->getUpdatesAt( _itemIndex );
}
const BatchedDeleteDocument* getDelete() const {
return _request->getDeleteRequest()->getDeletesAt( _itemIndex );
}
private:
const BatchedCommandRequest* _request;
const int _itemIndex;
};
} // namespace mongo
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