how to initialize database after server has started

hi
in my spring mvc project the way i am currently initializing my database is to define beans in xmls and autowire my dao
 so when the server starts up my dao class is ready to perform data operations.
but i want to do it another way. let the server start and then i initialize my database and dao and use them as before i was using when doing autowiring.

how to implement this ?

thanks
Rohit BajajAsked:
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gurpsbassiCommented:
what is the motivation for doing this?
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Rohit BajajAuthor Commented:
Motivation is the same as in question :
http://www.experts-exchange.com/questions/28738570/writing-custom-PropertySource-in-Spring-mvc-applicaiont.html#a41033063
Basically i will be reading the environment variable FLOCK_APPS_CONFIG from a file on linux as i am using a headless linux user on which i cannot set environement variables.
And jetty needs this value before it starts up completely to setup database etc. which i have autowired.

So i was thinking if i can delay the setting up of databases and configure it after the jetty starts by reading from a file that will work. As after jetty has started up i can read from a file i assume easily
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gurpsbassiCommented:
normally this sort of thing is done using JNDI lookup.
You would typically configure the datasource JNDI name in the server and use the application to look it up.
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