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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 <string>
#include "mongo/base/disallow_copying.h"
#include "mongo/db/commands/write_commands/batch.h"
namespace mongo {
class BSONObjBuilder;
class Client;
class CurOp;
class OpCounters;
class OpDebug;
struct LastError;
/**
* An instance of WriteBatchExecutor is an object capable of issuing a write batch.
*/
class WriteBatchExecutor {
MONGO_DISALLOW_COPYING(WriteBatchExecutor);
public:
WriteBatchExecutor(Client* client, OpCounters* opCounters, LastError* le);
/**
* Issues writes with requested write concern.
* Returns true (and fills "result") if request properly formatted.
* Returns false (and fills "errMsg") if not.
*/
bool executeBatch(const WriteBatch& writeBatch, string* errMsg, BSONObjBuilder* result);
private:
/**
* Issues writes in batch. Fills "resultsArray" with write results.
* Returns true iff all items in batch were issued successfully.
*/
bool applyWriteBatch(const WriteBatch& writeBatch, BSONArrayBuilder* resultsArray);
/**
* Issues a single write. Fills "results" with write result.
* Returns true iff write item was issued sucessfully.
*/
bool applyWriteItem(const string& ns,
const WriteBatch::WriteItem& writeItem,
BSONObjBuilder* results);
//
// Helpers to issue underlying write.
// Returns true iff write item was issued sucessfully.
//
bool applyInsert(const string& ns,
const WriteBatch::WriteItem& writeItem,
CurOp* currentOp);
bool applyUpdate(const string& ns,
const WriteBatch::WriteItem& writeItem,
CurOp* currentOp);
bool applyDelete(const string& ns,
const WriteBatch::WriteItem& writeItem,
CurOp* currentOp);
// Client object to issue writes on behalf of.
// Not owned here.
Client* _client;
// OpCounters object to update.
// Not owned here.
OpCounters* _opCounters;
// LastError object to use for preparing write results.
// Not owned here.
LastError* _le;
};
} // namespace mongo
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