delight.promise.internal

Class PromiseImpl<ResultType>

java.lang.Object

delight.promise.internal.PromiseImpl<ResultType>

All Implemented Interfaces:

delight.async.Operation<ResultType>, Promise<ResultType>

Direct Known Subclasses:

JrePromiseImpl

public class PromiseImpl<ResultType>
extends Object
implements Promise<ResultType>

Field Summary

Fields

Modifier and Type	Field and Description
protected delight.async.Value<Throwable>	failureCache
protected delight.async.Operation<ResultType>	operation

Constructor Summary

Constructors

Constructor and Description
PromiseImpl(delight.async.Operation<ResultType> operation)

Method Summary

Modifier and Type	Method and Description
void	addExceptionFallback(delight.functional.Closure<Throwable> closure) Registeres a listener for exceptions, which is triggered when no listeners have been defined using Promise.catchExceptions(Closure)
void	apply(delight.async.callbacks.ValueCallback<ResultType> callback)
ResultType	cachedResult() If this promises has been resolved, the result obtained will be returned by this function.
void	catchExceptions(delight.functional.Closure<Throwable> closure) Register a listener of exceptions.
ResultType	get() Attempts to resolve this promise synchronously.
void	get(delight.functional.Closure<ResultType> closure) Attempts to resolve this promise asynchronously.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

operation

protected final delight.async.Operation<ResultType> operation

failureCache

protected final delight.async.Value<Throwable> failureCache

Constructor Detail

PromiseImpl

public PromiseImpl(delight.async.Operation<ResultType> operation)

Method Detail

apply

public void apply(delight.async.callbacks.ValueCallback<ResultType> callback)

Specified by:

apply in interface delight.async.Operation<ResultType>

cachedResult

public ResultType cachedResult()

Description copied from interface: Promise

If this promises has been resolved, the result obtained will be returned by this function.

Otherwise, returns null.

Specified by:

cachedResult in interface Promise<ResultType>

Returns:

get

public ResultType get()

Description copied from interface: Promise

Attempts to resolve this promise synchronously.

Specified by:

get in interface Promise<ResultType>

Returns:

Result of the promise.

catchExceptions

public void catchExceptions(delight.functional.Closure<Throwable> closure)

Description copied from interface: Promise

Register a listener of exceptions.

Specified by:

catchExceptions in interface Promise<ResultType>

Parameters:

closure - Closure to be called if an exception occurs in resolving the promise.

get

public void get(delight.functional.Closure<ResultType> closure)

Description copied from interface: Promise

Attempts to resolve this promise asynchronously.

Specified by:

get in interface Promise<ResultType>

toString

public String toString()

Overrides:

toString in class Object

addExceptionFallback

public void addExceptionFallback(delight.functional.Closure<Throwable> closure)

Description copied from interface: Promise

Registeres a listener for exceptions, which is triggered when no listeners have been defined using Promise.catchExceptions(Closure)

Specified by:

addExceptionFallback in interface Promise<ResultType>