bool SessionManager::closeSession( const String& sSID, uint32 token )
{
m_mtx.lock();
SessionMap::iterator iter = m_smap.find( sSID );
if( iter != m_smap.end() )
{
SessionData* sd = iter->second;
m_smap.erase( sSID );
sd->clearRefs();
m_mtx.unlock();
sd->dispose();
delete sd;
return true;
}
m_mtx.unlock();
return false;
}
void SessionManager::expireOldSessions()
{
numeric now = Sys::_seconds();
std::deque<SessionData*> expiredSessions;
m_mtx.lock();
while( ! m_expmap.empty() && m_expmap.begin()->first < now )
{
SessionData::WeakRef* wsd = m_expmap.begin()->second;
SessionData* sd = wsd->get();
// Is the session still alive?
if ( sd != 0 && sd->lastTouched() + timeout() < now )
{
// the data is dead, so we remove it now from the available map
m_smap.erase( sd->sID() );
// prevents others (and ourselves) to use it again
sd->clearRefs();
// and we push it aside for later clearing
expiredSessions.push_back( sd );
}
// also, take it away from our expired data
m_expmap.erase( m_expmap.begin() );
}
m_mtx.unlock();
// now we can destroy the expired sessions
std::deque<SessionData*>::iterator elem = expiredSessions.begin();
while( elem != expiredSessions.end() )
{
SessionData* sd = *elem;
sd->dispose();
delete sd;
++elem;
}
}
SessionData* SessionManager::getSession( const Falcon::String& sSID, uint32 token )
{
SessionData* sd = 0;
bool bCreated;
// Should we start a new thread for this?
if( timeout() > 0 )
expireOldSessions();
m_mtx.lock();
SessionMap::iterator iter = m_smap.find( sSID );
if( iter != m_smap.end() )
{
sd = iter->second;
if ( sd == 0 || sd->isAssigned() )
{
m_mtx.unlock();
return 0;
}
sd->assign( token );
// We must manipulate m_susers in the lock to prevent concurrent update
// from other threads.
m_susers[token].push_back( sd->getWeakRef() );
// now that the session is assigned, we are free to manipulate it outside the lock.
m_mtx.unlock();
bCreated = false;
}
else
{
// create the session (fast)
sd = createSession( sSID );
// assign to our maps
m_smap[sSID] = sd;
m_susers[token].push_back( sd->getWeakRef() );
// assign the session
sd->assign( token );
// try to resume after unlock
m_mtx.unlock();
bCreated = true;
}
// can we resume this session?
if( ! sd->resume() )
{
// all useless work.
m_mtx.lock();
m_smap.erase( sSID );
sd->clearRefs();
m_mtx.unlock();
//If the session was created, we should have done it.
if( ! bCreated )
{
sd->setInvalid();
}
else
{
delete sd;
sd = 0;
}
}
return sd;
}
