mongodb: strategy.h Source File

00001 // strategy.h
00002 /*
00003  *    Copyright (C) 2010 10gen Inc.
00004  *
00005  *    This program is free software: you can redistribute it and/or  modify
00006  *    it under the terms of the GNU Affero General Public License, version 3,
00007  *    as published by the Free Software Foundation.
00008  *
00009  *    This program is distributed in the hope that it will be useful,
00010  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  *    GNU Affero General Public License for more details.
00013  *
00014  *    You should have received a copy of the GNU Affero General Public License
00015  *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
00016  */
00017 
00018 
00019 #pragma once
00020 
00021 #include "../pch.h"
00022 #include "chunk.h"
00023 #include "request.h"
00024 
00025 namespace mongo {
00026 
00027     class Strategy {
00028     public:
00029         Strategy() {}
00030         virtual ~Strategy() {}
00031         virtual void queryOp( Request& r ) = 0;
00032         virtual void getMore( Request& r ) = 0;
00033         virtual void writeOp( int op , Request& r ) = 0;
00034 
00035     protected:
00036         void doWrite( int op , Request& r , const Shard& shard , bool checkVersion = true );
00037         void doQuery( Request& r , const Shard& shard );
00038 
00039         void insert( const Shard& shard , const char * ns , const BSONObj& obj );
00040 
00041     };
00042 
00043     extern Strategy * SINGLE;
00044     extern Strategy * SHARDED;
00045 
00046 }
00047