void DBConnectionPool::flush(){
boostlock L(poolMutex);
for ( map<string,PoolForHost*>::iterator i = pools.begin(); i != pools.end(); i++ ){
PoolForHost* p = i->second;
vector<DBClientBase*> all;
while ( ! p->pool.empty() ){
DBClientBase * c = p->pool.front();
p->pool.pop();
all.push_back( c );
bool res;
c->isMaster( res );
}
for ( vector<DBClientBase*>::iterator i=all.begin(); i != all.end(); i++ ){
p->pool.push( *i );
}
}
}
