com.sleepycat.je.utilint

Class PollCondition

java.lang.Object

com.sleepycat.je.utilint.PollCondition

All Implemented Interfaces:

java.util.function.Supplier<Boolean>

public abstract class PollCondition
extends Object
implements java.util.function.Supplier<Boolean>

Utility class that permits a "poll based" waiting for a condition. Either the condition() method should be implemented in a subclass, or the static await(long, long, Supplier) method can be called. The latter allows passing a lambda.

Constructor Summary

Constructors

Constructor and Description
PollCondition(long checkPeriodMs, long timeoutMs)

Method Summary

Modifier and Type	Method and Description
boolean	await() Wait for the condition() method to return true.
static boolean	await(long checkPeriodMs, long timeoutMs, Object waitOn, java.util.function.Supplier<Boolean> cond) Like await(long, long, Supplier) but calls waitOn.wait rather than Thread.sleep.
static boolean	await(long checkPeriodMs, long timeoutMs, java.util.function.Supplier<Boolean> cond) Wait for a condition that can be specified as a lambda.
protected abstract boolean	condition()
Boolean	get()

Methods inherited from class java.lang.Object

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

Constructor Detail

PollCondition

public PollCondition(long checkPeriodMs,
                     long timeoutMs)

Method Detail

condition

protected abstract boolean condition()

get

public Boolean get()

Specified by:

get in interface java.util.function.Supplier<Boolean>

await

public boolean await()

Wait for the condition() method to return true.

await

public static boolean await(long checkPeriodMs,
                            long timeoutMs,
                            java.util.function.Supplier<Boolean> cond)

Wait for a condition that can be specified as a lambda.

await

public static boolean await(long checkPeriodMs,
                            long timeoutMs,
                            Object waitOn,
                            java.util.function.Supplier<Boolean> cond)

Like await(long, long, Supplier) but calls waitOn.wait rather than Thread.sleep. This allows checking the condition on demand by calling waitOn.notify.