web.xml load class on startup into context

I have a class that I want to instantiate at startup. It does concurrent stuff and has开发者_如何学编程 to be visible for all incoming requests. Placing it in the ServletContext should be the right way to go.

I don't care about bottlenecks, all requests have to work on the same data.

But how can I tell my Webserver to load this class once at startup and place it into the context?

For Strings there is the setInitParameter, but can't we do the same for objects?

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You might want to look at a ServletContexListener and store your Object in context when the context is initalized. You can get the ServletContext from the passed ServletContextEvent.