SessionData* SessionManager::startSession( uint32 token )
{
SessionData* sd = 0;
Falcon::String sSID;
// No one can possibly use this SD as no one can know it.
sd = createUniqueId( sSID );
m_mtx.lock();
m_susers[token].push_back( sd->getWeakRef() );
// assign the session
sd->assign( token );
m_mtx.unlock();
return sd;
}
SessionData* SessionManager::startSession( uint32 token, const Falcon::String &sSID )
{
SessionData* sd = 0;
m_mtx.lock();
if ( m_smap.find( sSID ) == m_smap.end() )
{
sd = createSession(sSID);
m_smap[ sSID ] = sd;
m_susers[token].push_back( sd->getWeakRef() );
// assign the session
sd->assign( token );
}
m_mtx.unlock();
// else, it's still 0
return sd;
}
// release all the sessions associated with this token
bool SessionManager::releaseSessions( uint32 token )
{
m_mtx.lock();
// do we have the session?
SessionUserMap::iterator pos = m_susers.find( token );
if( pos != m_susers.end() )
{
// copy the list of sessions to be closed, so that we can work on it.
SessionList lCopy = pos->second;
m_susers.erase( pos );
m_mtx.unlock();
SessionList::iterator iter = lCopy.begin();
while( iter != lCopy.end() )
{
SessionData::WeakRef* wsd = *iter;
SessionData* sd = wsd->get();
// Still a valid reference?
if( sd != 0 )
{
// store on persistent media
sd->store();
// mark as used now
sd->touch();
// make available for other requests
m_mtx.lock();
if( timeout() > 0 )
{
m_expmap.insert( ExpirationMap::value_type( sd->lastTouched() + timeout(), sd->getWeakRef() ) );
}
sd->release();
m_mtx.unlock();
}
wsd->dropped();
++iter;
}
}
else
{
m_mtx.unlock();
}
return true;
}
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;
}
