what happens on deployment of gwt app (using guice) - what lines of code are executed

[tanteanni]

on deploying my gwt web app i noticed that some code of server side is executed. But i have no idea what code is executed or how to control the code that is being executed on deployment.

So how does the bootstrapping/deployment work in general  and in the special case of a gwt app that uses guice (i don't know if this is a general web-app question or a gwt question or both)? (probably all classes bound to singletons are instantiated?)

At the end i want to write a class/ o couple of methods that check server configuration and external data sources and log their results - some (bad) results  should cause an abort of deployment.

thx in advance