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// syncclusterconnection.h
/*
* Copyright 2010 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "../stdafx.h"
#include "dbclient.h"
namespace mongo {
/**
* this is a connection to a cluster of servers that operate as one
* for super high durability
*/
class SyncClusterConnection : public DBClientBase {
public:
/**
* @param commaSeperated should be 3 hosts comma seperated
*/
SyncClusterConnection( string commaSeperated );
SyncClusterConnection( string a , string b , string c );
~SyncClusterConnection();
/**
* @return true if all servers are up and ready for writes
*/
bool prepare( string& errmsg );
/**
* runs fsync on all servers
*/
bool fsync( string& errmsg );
// --- from DBClientInterface
virtual auto_ptr<DBClientCursor> query(const string &ns, Query query, int nToReturn, int nToSkip,
const BSONObj *fieldsToReturn, int queryOptions, int batchSize );
virtual auto_ptr<DBClientCursor> getMore( const string &ns, long long cursorId, int nToReturn, int options );
virtual void insert( const string &ns, BSONObj obj );
virtual void insert( const string &ns, const vector< BSONObj >& v );
virtual void remove( const string &ns , Query query, bool justOne );
virtual void update( const string &ns , Query query , BSONObj obj , bool upsert , bool multi );
virtual string toString(){
return _toString();
}
virtual bool call( Message &toSend, Message &response, bool assertOk );
virtual void say( Message &toSend );
virtual void sayPiggyBack( Message &toSend );
virtual string getServerAddress() const { return _address; }
virtual bool isFailed() const {
return false;
}
private:
SyncClusterConnection( SyncClusterConnection& prev );
string _toString() const;
bool _commandOnActive(const string &dbname, const BSONObj& cmd, BSONObj &info, int options=0);
auto_ptr<DBClientCursor> _queryOnActive(const string &ns, Query query, int nToReturn, int nToSkip,
const BSONObj *fieldsToReturn, int queryOptions, int batchSize );
bool _isReadOnly( const string& name );
void _checkLast();
void _connect( string host );
string _address;
vector<DBClientConnection*> _conns;
map<string,int> _lockTypes;
};
};
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