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// strategy.h
/*
* Copyright (C) 2010 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 "mongo/pch.h"
#include "chunk.h"
#include "request.h"
namespace mongo {
/**
* Legacy interface for processing client read/write/cmd requests.
*/
class Strategy {
public:
Strategy() {}
void queryOp( Request& r );
void getMore( Request& r );
void writeOp( int op , Request& r );
struct CommandResult {
Shard shardTarget;
ConnectionString target;
BSONObj result;
};
/**
* Executes a command against a particular database, and targets the command based on a
* collection in that database.
*
* This version should be used by internal commands when possible.
*/
void commandOp( const std::string& db,
const BSONObj& command,
int options,
const std::string& versionedNS,
const BSONObj& targetingQuery,
std::vector<CommandResult>* results );
/**
* Executes a command represented in the Request on the sharded cluster.
*
* DEPRECATED: should not be used by new code.
*/
void clientCommandOp( Request& r );
protected:
bool handleSpecialNamespaces( Request& r , QueryMessage& q );
};
extern Strategy* STRATEGY;
}
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