[Twisted-Python] Application Start Up and Tear Down

Hi, so far I've been using only one Factory in my application. So, all the intialization and deinitialization code was in startFactory() / stopFactory(). Now I have to add another protocol with another factory. Is there a similar pair of methods for the application (server) where I can initialize resources (db pool, for example) upon startup and free them upon shutdown? -- Best regards, Pavel Bastov