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/* connpool.cpp
*/
/* Copyright 2009 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.
*/
// _ todo: reconnect?
#include "stdafx.h"
#include "connpool.h"
#include "../db/commands.h"
namespace mongo {
DBConnectionPool pool;
DBClientBase* DBConnectionPool::get(const string& host) {
boostlock L(poolMutex);
PoolForHost *&p = pools[host];
if ( p == 0 )
p = new PoolForHost();
if ( p->pool.empty() ) {
string errmsg;
DBClientBase *c;
if( host.find(',') == string::npos ) {
DBClientConnection *cc = new DBClientConnection(true);
log(2) << "creating new connection for pool to:" << host << endl;
if ( !cc->connect(host.c_str(), errmsg) ) {
delete cc;
uassert( 11002 , (string)"dbconnectionpool: connect failed " + host , false);
return 0;
}
c = cc;
onCreate( c );
}
else {
DBClientPaired *p = new DBClientPaired();
if( !p->connect(host) ) {
delete p;
uassert( 11003 , (string)"dbconnectionpool: connect failed [2] " + host , false);
return 0;
}
c = p;
}
return c;
}
DBClientBase *c = p->pool.top();
p->pool.pop();
onHandedOut( c );
return c;
}
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.top();
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 );
}
}
}
void DBConnectionPool::addHook( DBConnectionHook * hook ){
_hooks.push_back( hook );
}
void DBConnectionPool::onCreate( DBClientBase * conn ){
if ( _hooks.size() == 0 )
return;
for ( list<DBConnectionHook*>::iterator i = _hooks.begin(); i != _hooks.end(); i++ ){
(*i)->onCreate( conn );
}
}
void DBConnectionPool::onHandedOut( DBClientBase * conn ){
if ( _hooks.size() == 0 )
return;
for ( list<DBConnectionHook*>::iterator i = _hooks.begin(); i != _hooks.end(); i++ ){
(*i)->onHandedOut( conn );
}
}
class PoolFlushCmd : public Command {
public:
PoolFlushCmd() : Command( "connpoolsync" ){}
virtual bool run(const char*, mongo::BSONObj&, std::string&, mongo::BSONObjBuilder& result, bool){
pool.flush();
result << "ok" << 1;
return true;
}
virtual bool slaveOk(){
return true;
}
} poolFlushCmd;
} // namespace mongo
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