com.amazonaws.services.simpleworkflow.flow.core

クラス Task

java.lang.Object

com.amazonaws.services.simpleworkflow.flow.core.Task

public abstract class Task
extends java.lang.Object

Asynchronous task that is executed when all Promises passed to its constructor are ready (null parameter is considered ready).

Should be created in the context of AsyncScope.doAsync() method, from doExecute() or from TryCatchFinally do... methods. Exceptions thrown from doExecute() are delivered asynchronously to the wrapping TryCatchFinally.doCatch(Throwable) method or rethrown from AsyncScope.eventLoop() if no wrapping TryCatchFinally is found.

Example of using Task to implement asynchronous function that sums parameters when both of them are ready:

 
 public Promise<Integer> sum(Promise<Integer> a, Promise<Integer> b) {
     Settable<Integer> result = new Settable<Integer>();
     new Task(a, b) {
         public void doExecute() {
             result.set(a.get() + b.get());
         }
     };
     return result;
 }
 
 

関連項目:

AsyncScope, TryCatchFinally, Promise

コンストラクタの概要

コンストラクタ

修飾子	コンストラクタと説明
	Task(com.amazonaws.services.simpleworkflow.flow.core.AsyncContextAware parent, boolean daemon, Promise<?>... waitFor)
protected	Task(com.amazonaws.services.simpleworkflow.flow.core.AsyncContextAware parent, java.lang.Boolean daemon, java.lang.String parentTaskMethodName, boolean hideParentTaskMethodName, int skipStackLines, Promise<?>... waitFor)
	Task(com.amazonaws.services.simpleworkflow.flow.core.AsyncContextAware parent, Promise<?>... waitFor)
	Task(boolean daemon, Promise<?>... waitFor)
protected	Task(java.lang.Boolean daemon, java.lang.String parentTaskMethodName, boolean hideParentTaskMethodName, int skipStackLines, Promise<?>... waitFor)
	Task(Promise<?>... waitFor)

メソッドの概要

メソッド

修飾子とタイプ	メソッドと説明
protected abstract void	doExecute()
java.lang.String	getName()
java.lang.StackTraceElement[]	getStackTrace()
void	setName(java.lang.String name)
java.lang.String	toString()

クラスから継承されたメソッド java.lang.Object

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

コンストラクタの詳細

Task

public Task(Promise<?>... waitFor)

Task

public Task(boolean daemon,
    Promise<?>... waitFor)

Task

public Task(com.amazonaws.services.simpleworkflow.flow.core.AsyncContextAware parent,
    boolean daemon,
    Promise<?>... waitFor)

Task

public Task(com.amazonaws.services.simpleworkflow.flow.core.AsyncContextAware parent,
    Promise<?>... waitFor)

Task

protected Task(com.amazonaws.services.simpleworkflow.flow.core.AsyncContextAware parent,
    java.lang.Boolean daemon,
    java.lang.String parentTaskMethodName,
    boolean hideParentTaskMethodName,
    int skipStackLines,
    Promise<?>... waitFor)

Task

protected Task(java.lang.Boolean daemon,
    java.lang.String parentTaskMethodName,
    boolean hideParentTaskMethodName,
    int skipStackLines,
    Promise<?>... waitFor)

メソッドの詳細

getName

public java.lang.String getName()

setName

public void setName(java.lang.String name)

getStackTrace

public java.lang.StackTraceElement[] getStackTrace()

toString

public java.lang.String toString()

オーバーライド:

toString クラス内 java.lang.Object

doExecute

protected abstract void doExecute()
                           throws java.lang.Throwable

例外:

java.lang.Throwable