Package com.batch.batch_flutter

Class Promise<T>

java.lang.Object

com.batch.batch_flutter.Promise<T>

public class Promise<T>
extends Object

A simple Promise-like implementation that is not thread-safe. then() can't mutate the value.

Be careful: catch only works for an explicit rejection, NOT automatically for exceptions thrown in ThenRunnables

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	Promise.CatchRunnable
static interface	Promise.DeferredResultExecutorRunnable<T>	Executor that does not automatically resolve the promise once done
static interface	Promise.ExecutorRunnable<T>	Executor that automatically resolves the promise with the returned value once done, even if null
static enum	Promise.Status
static interface	Promise.ThenRunnable<T>

Constructor Summary

Constructors

Constructor	Description
Promise()
Promise(Promise.DeferredResultExecutorRunnable<T> executor)
Promise(Promise.ExecutorRunnable<T> executor)

Method Summary

Modifier and Type	Method	Description
Promise<T>	catchException(Promise.CatchRunnable catchRunnable)
Promise.Status	getStatus()
void	reject(Exception exception)
static <T> Promise<T>	rejected(Exception exception)
void	resolve(T value)
static <T> Promise<T>	resolved(T value)
Promise<T>	setExecutor(Executor executor)	Set the executor then/catch runnables should be posted on
Promise<T>	then(Promise.ThenRunnable<T> thenRunnable)

Methods inherited from class java.lang.Object

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

Constructor Details

Promise

public Promise()

Promise

public Promise(Promise.ExecutorRunnable<T> executor)

Promise

public Promise(Promise.DeferredResultExecutorRunnable<T> executor)

Method Details

resolved

public static <T> Promise<T> resolved(T value)

rejected

public static <T> Promise<T> rejected(Exception exception)

resolve

public void resolve(T value)

reject

public void reject(Exception exception)

then

public Promise<T> then(Promise.ThenRunnable<T> thenRunnable)

catchException

public Promise<T> catchException(Promise.CatchRunnable catchRunnable)

getStatus

public Promise.Status getStatus()

setExecutor

public Promise<T> setExecutor(Executor executor)

Set the executor then/catch runnables should be posted on