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// strategy.h
#pragma once
#include "stdafx.h"
#include "shard.h"
#include "request.h"
namespace mongo {
class Strategy {
public:
Strategy(){}
virtual ~Strategy() {}
virtual void queryOp( Request& r ) = 0;
virtual void getMore( Request& r ) = 0;
virtual void writeOp( int op , Request& r ) = 0;
protected:
void doWrite( int op , Request& r , string server );
void doQuery( Request& r , string server );
void insert( string server , const char * ns , const BSONObj& obj );
};
extern Strategy * SINGLE;
extern Strategy * SHARDED;
void checkShardVersion( DBClientBase & conn , const string& ns , bool authoritative = false );
bool setShardVersion( DBClientBase & conn , const string& ns , ServerShardVersion version , bool authoritative , BSONObj& result );
bool lockNamespaceOnServer( const string& server , const string& ns );
bool lockNamespaceOnServer( DBClientBase& conn , const string& ns );
}
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