Governator Phases

Guice users are familiar with the “binding phase” where Guice calls your modules to register bindings. You then create the Injector as a second phase. Governator introduces several new phases. The timeline is like this:

1. Classpath scanning phase
   • Specified packages are scanned for Governator annotations
   • The classes are stored for later phases
2. Bootstrapping phase
   • The Application bootstrap module (if specified) is invoked
   • Auto bind ConfigurationProviders are bound
   • The LifecycleManager is created via the bootstrap Injector
3. Main Injector phase
   • Application provided modules are added
   • AutoBindSingletons are bound
   • The main Injector is created
   • As each object is created by Guice:
     1. PreConfiguration methods are called
     2. Configuration values are set
     3. PostConstruct methods are called
4. Start phase
   • The application calls LifecycleManager.start()
   • Bean/field validation is done
   • Any WarmUp methods are executed in background threads

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When application calls LifecycleManager.close() …

Each object that is being actively managed is shutdown in these steps:

1. CoolDown methods are executed in background threads
2. PreDestroy methods are called