Package com.yahoo.jdisc.handler

Class FutureConjunction

java.lang.Object

com.yahoo.jdisc.handler.FutureConjunction

All Implemented Interfaces:

com.google.common.util.concurrent.ListenableFuture<Boolean>, Future<Boolean>

public final class FutureConjunction
extends Object
implements com.google.common.util.concurrent.ListenableFuture<Boolean>

This class implements a Future<Boolean> that is conjunction of zero or more other Future<Boolean>s, i.e. it evaluates to true if, and only if, all its operands evaluate to true. To use this class, simply create an instance of it and add operands to it using the addOperand(ListenableFuture) method.

TODO: consider rewriting usage of FutureConjunction to use CompletableFuture instead.

Author:

Simon Thoresen Hult

Constructor Summary

Constructors

Constructor	Description
FutureConjunction()

Method Summary

Modifier and Type	Method	Description
void	addListener(Runnable listener, Executor executor)
void	addOperand(com.google.common.util.concurrent.ListenableFuture<Boolean> operand)	Adds a ListenableFuture<Boolean> to this conjunction.
boolean	cancel(boolean mayInterruptIfRunning)
Boolean	get()
Boolean	get(long timeout, TimeUnit unit)
boolean	isCancelled()
boolean	isDone()

Methods inherited from class java.lang.Object

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

Constructor Detail

FutureConjunction

public FutureConjunction()

Method Detail

addOperand

public void addOperand(com.google.common.util.concurrent.ListenableFuture<Boolean> operand)

Adds a ListenableFuture<Boolean> to this conjunction. This can be called at any time, even after having called get() previously.

Parameters:

operand - The operand to add to this conjunction.

addListener

public void addListener(Runnable listener,
                        Executor executor)

Specified by:

addListener in interface com.google.common.util.concurrent.ListenableFuture<Boolean>

cancel

public final boolean cancel(boolean mayInterruptIfRunning)

Specified by:

cancel in interface Future<Boolean>

isCancelled

public final boolean isCancelled()

Specified by:

isCancelled in interface Future<Boolean>

isDone

public final boolean isDone()

Specified by:

isDone in interface Future<Boolean>

get

public final Boolean get()
                  throws InterruptedException,
                         ExecutionException

Specified by:

get in interface Future<Boolean>

Throws:

InterruptedException

ExecutionException

get

public final Boolean get(long timeout,
                         TimeUnit unit)
                  throws InterruptedException,
                         ExecutionException,
                         TimeoutException

Specified by:

get in interface Future<Boolean>

Throws:

InterruptedException

ExecutionException

TimeoutException