org.apache.cassandra.utils

Class RecomputingSupplier<T>

java.lang.Object

org.apache.cassandra.utils.RecomputingSupplier<T>

public class RecomputingSupplier<T>
extends java.lang.Object

Supplier that caches the last computed value until it is reset, forcing every caller of get(long, TimeUnit) to wait until this value is computed if it was not computed yet. Calling recompute() won't reset value for the already waiting consumers, but instead will schedule one recomputation as soon as current one is done.

Constructor Summary

Constructors

Constructor and Description
RecomputingSupplier(java.util.function.Supplier<T> supplier, java.util.concurrent.ExecutorService executor)

Method Summary

Modifier and Type	Method and Description
T	get(long timeout, java.util.concurrent.TimeUnit timeUnit)
void	recompute()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

RecomputingSupplier

public RecomputingSupplier(java.util.function.Supplier<T> supplier,
                           java.util.concurrent.ExecutorService executor)

Method Detail

recompute

public void recompute()

get

public T get(long timeout,
             java.util.concurrent.TimeUnit timeUnit)
      throws java.lang.InterruptedException,
             java.util.concurrent.ExecutionException,
             java.util.concurrent.TimeoutException

Throws:

java.lang.InterruptedException

java.util.concurrent.ExecutionException

java.util.concurrent.TimeoutException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object