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// shard.h
/**
* Copyright (C) 2008 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 "../pch.h"
#include "../client/connpool.h"
namespace mongo {
class ShardConnection;
class Shard {
public:
Shard()
: _name(""),_addr(""){
}
Shard( const string& name , const string& addr )
: _name(name), _addr( addr ){
}
Shard( const Shard& other )
: _name( other._name ) , _addr( other._addr ){
}
Shard( const Shard* other )
: _name( other->_name ) ,_addr( other->_addr ){
}
static Shard make( const string& ident ){
Shard s;
s.reset( ident );
return s;
}
/**
* @param ident either name or address
*/
void reset( const string& ident );
void setAddress( const string& addr , bool authoritative = false );
string getName() const {
assert( _name.size() );
return _name;
}
string getConnString() const {
assert( _addr.size() );
return _addr;
}
string toString() const {
return _name + ":" + _addr;
}
friend ostream& operator << (ostream& out, const Shard& s) {
return (out << s.toString());
}
bool operator==( const Shard& s ) const {
bool n = _name == s._name;
bool a = _addr == s._addr;
assert( n == a ); // names and address are 1 to 1
return n;
}
bool operator!=( const Shard& s ) const {
bool n = _name == s._name;
bool a = _addr == s._addr;
return ! ( n && a );
}
bool operator==( const string& s ) const {
return _name == s || _addr == s;
}
bool operator!=( const string& s ) const {
return _name != s && _addr != s;
}
bool operator<(const Shard& o) const {
return _name < o._name;
}
bool ok() const {
return _addr.size() > 0 && _addr.size() > 0;
}
BSONObj runCommand( const string& db , const string& simple ){
return runCommand( db , BSON( simple << 1 ) );
}
BSONObj runCommand( const string& db , const BSONObj& cmd );
static void getAllShards( list<Shard>& all );
static Shard EMPTY;
private:
string _name;
string _addr;
};
class ShardConnection {
public:
ShardConnection( const Shard * s )
: _conn( s->getConnString() ){
}
ShardConnection( const Shard& s )
: _conn( s.getConnString() ){
}
ShardConnection( const string& addr )
: _conn( addr ){
}
void done(){
_conn.done();
}
void kill(){
_conn.kill();
}
DBClientBase& conn(){
return _conn.conn();
}
DBClientBase* operator->(){
return _conn.get();
}
private:
ScopedDbConnection _conn;
};
}
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