# Package org.grails.async.factory

- Class Summary
  Class | Description
  --- | ---
  BoundPromise | A bound promise is a promise which is already resolved and doesn't require any asynchronous processing to calculate the value
  SynchronousPromise | A promise that executes synchronously, in the same thread as the creator
  SynchronousPromiseFactory | A PromiseFactory implementation that constructors promises that execute synchronously.