Module Initialization

The InfoGrid Module Framework is driven by a BootLoader. Several BootLoader implementations exist. The CommandlineBootLoader will be used for explanation purposes; other BootLoader implementations work in a similar manner.

The BootLoader is run with a number of configuration parameters, which may include:

• the name of the desired root StandardModule; this is required
• location of Modules
• possible overriding configuration parameters

The BootLoader:

1. Creates and initializes the ModuleRegistry, which entails:
   • examining the provided location of Modules in the file system or on the network
   • loading found ModuleAdvertisements
2. Finds the root StandardModule
3. Recursively activates the root StandardModule (and all of its dependencies), which entails:
   • finding all dependent Modules of the current Module, and activating those
   • determining whether a given Module has an activation method specified in its ModuleAdvertisement, and if so, running it
4. Recursively configures the root StandardModule (and all of this dependencies)
   • determining configuration parameters for the current Module
   • finding all dependent Modules of the current Module, and configuring those, possibly overriding their configuration parameters
   • determining whether a given Module has a configuration method specified in its ModuleAdvertisement, and if so, running it, possiblye with overridden configuration parameters
5. Runs the root StandardModule
6. Recursively deactivating the root StandardModule (and all of its dependencies), which entails:
   • determining whether a given Module has a deactivation method specified in its ModuleAdvertisement, and if so, running it
   • finding all dependent Modules of the current Module, and deactivating those
7. Quits.

See also:

• ModuleFramework
• ModuleRegistry.