ExtensionManager

Some simple notes on loading and unloading extensions:

• The load method is called when an extension appears in the extensions block when it wasn't there in the last compilation
• The unload method is called when an extension is removed from the extensions block

ExtensionManager lifecycle call chart. In [square brackets] are methods called on the extension manager. In {curly braces} are the methods called on the class manager of the extension. Conditions are specified in (parens)

[startFullCompilation] // called by compiler | | (no exts) (ext foo) | | | v | [importExtension(foo)] // called by compiler | | | | (foo loaded) (foo not loaded) | | | | v v | {unload} {runOnce} | | | | v v | +-----{load} | | | // return control to compiler |(foo:bar not used) (foo:bar used) | | | | | v | | [replaceIdentifer(foo:bar)] // foo added to live set | | | | | | v v v [finishFullCompilation] | | | (no ext) (foo live) (foo not live) | | | --- --- v {unload} | ---