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## grails.async
[Java] Interface PromiseFactory

    public interface PromiseFactory

An interface capable of creating Promise instances. The Promises static methods use this interface to create promises. The default Promise creation mechanism can be overriden by setting Promises.setPromiseFactory

Authors:
  Graeme Rocher

Since:
  2.3

Method Summary
`void` | `addPromiseDecoratorLookupStrategy(PromiseDecoratorLookupStrategy lookupStrategy)` Adds a PromiseDecoratorLookupStrategy.
`groovy.lang.Closure` | `applyDecorators(groovy.lang.Closure c, java.util.List decorators)` Applies the registered decorators to the given closure
`Promise` | `createBoundPromise(java.lang.Object value)` Creates a promise with a value pre-bound to it
`Promise` | `createPromise(java.util.Map map)` Creates a promise from the given map where the values of the map are either closures or Promise instances
`Promise` | `createPromise(Promise... promises)` Creates a promise from one or more other promises
`Promise` | `createPromise(groovy.lang.Closure... c)` Creates a promise from one or many closures
`Promise` | `createPromise(groovy.lang.Closure c, java.util.List decorators)` Creates a promise from one or many closures
`Promise` | `createPromise(java.util.List closures, java.util.List decorators)` Creates a promise from one or many closures
`Promise` | `createPromise(java.util.List closures)` Creates a promise from one or many closures
`Promise` | `onComplete(java.util.List promises, groovy.lang.Closure callable)` Executes the given callback when the list of promises completes
`Promise` | `onError(java.util.List promises, groovy.lang.Closure callable)` Executes the given callback if an error occurs for the list of promises
`java.util.List` | `waitAll(Promise... promises)` Synchronously waits for all promises to complete returning a list of values
`java.util.List` | `waitAll(java.util.List promises)` Synchronously waits for all promises to complete returning a list of values
`java.util.List` | `waitAll(java.util.List promises, long timeout, java.util.concurrent.TimeUnit units)` Synchronously waits for all promises to complete returning a list of values

Method Detail

### addPromiseDecoratorLookupStrategy

    public void addPromiseDecoratorLookupStrategy(PromiseDecoratorLookupStrategy lookupStrategy)

  Adds a PromiseDecoratorLookupStrategy. The strategy implementation must be stateless, do not add a strategy that contains state
  Parameters:
    `lookupStrategy` - The lookup strategy

### applyDecorators

    public groovy.lang.Closure applyDecorators(groovy.lang.Closure c, java.util.List decorators)

  Applies the registered decorators to the given closure
  Parameters:
    `c` - The closure
    `decorators` - The decorators
  Returns:
    The decorated closure

### createBoundPromise

    public Promise createBoundPromise(java.lang.Object value)

  Creates a promise with a value pre-bound to it
  Parameters:
    `value` - The value
    `` - The type of the value
  Returns:
    A Promise

### createPromise

    public Promise createPromise(java.util.Map map)

  Creates a promise from the given map where the values of the map are either closures or Promise instances
  Parameters:
    `map` - The map
  Returns:
    A promise

### createPromise

    public Promise createPromise(Promise... promises)

  Creates a promise from one or more other promises
  Parameters:
    `promises` - The promises
  Returns:
    The promise

### createPromise

    public Promise createPromise(groovy.lang.Closure... c)

  Creates a promise from one or many closures
  Parameters:
    `c` - One or many closures
  Returns:
    A promise

### createPromise

    public Promise createPromise(groovy.lang.Closure c, java.util.List decorators)

  Creates a promise from one or many closures
  Parameters:
    `c` - One or many closures
  Returns:
    A promise

### createPromise

    public Promise createPromise(java.util.List closures, java.util.List decorators)

  Creates a promise from one or many closures
  Parameters:
    `closures` - One or many closures
  Returns:
    A promise

### createPromise

    public Promise createPromise(java.util.List closures)

  Creates a promise from one or many closures
  Parameters:
    `closures` - One or many closures
  Returns:
    A promise

### onComplete

    public Promise onComplete(java.util.List promises, groovy.lang.Closure callable)

  Executes the given callback when the list of promises completes
  Parameters:
    `promises` - The promises
    `callable` - The callback to execute

### onError

    public Promise onError(java.util.List promises, groovy.lang.Closure callable)

  Executes the given callback if an error occurs for the list of promises
  Parameters:
    `promises` - The promises The promises
    `callable` - The error callback to execute

### waitAll

    public java.util.List waitAll(Promise... promises)

  Synchronously waits for all promises to complete returning a list of values
  Parameters:
    `promises` - The promises
  Returns:
    The list of bound values

### waitAll

    public java.util.List waitAll(java.util.List promises)

  Synchronously waits for all promises to complete returning a list of values
  Parameters:
    `promises` - The promises
  Returns:
    The list of bound values

### waitAll

    public java.util.List waitAll(java.util.List promises, long timeout, java.util.concurrent.TimeUnit units)

  Synchronously waits for all promises to complete returning a list of values
  Parameters:
    `promises` - The promises
  Returns:
    The list of bound values

Groovy Documentation