com.spotify.futures

Class AsyncRetrier

java.lang.Object

com.spotify.futures.AsyncRetrier

public final class AsyncRetrier
extends Object

A helper for retrying asynchronous calls. It implements retries up to a specified limit with a constant delay between each retry. TODO: Add support for specifying backoff behavior

Field Summary

Fields

Modifier and Type	Field and Description
static long	DEFAULT_DELAY_MILLIS
private ScheduledExecutorService	executorService

Constructor Summary

Constructors

Modifier	Constructor and Description
private	AsyncRetrier(ScheduledExecutorService executorService)

Method Summary

Modifier and Type	Method and Description
static AsyncRetrier	create(ScheduledExecutorService sleeper)
private <T> void	handleFailure(com.google.common.util.concurrent.SettableFuture<T> future, com.google.common.base.Supplier<com.google.common.util.concurrent.ListenableFuture<T>> code, int retries, long delay, TimeUnit timeUnit, com.google.common.base.Predicate<T> retryCondition, Throwable t)
<T> com.google.common.util.concurrent.ListenableFuture<T>	retry(com.google.common.base.Supplier<com.google.common.util.concurrent.ListenableFuture<T>> code, int retries)
<T> com.google.common.util.concurrent.ListenableFuture<T>	retry(com.google.common.base.Supplier<com.google.common.util.concurrent.ListenableFuture<T>> code, int retries, long delayMillis)
<T> com.google.common.util.concurrent.ListenableFuture<T>	retry(com.google.common.base.Supplier<com.google.common.util.concurrent.ListenableFuture<T>> code, int retries, long delay, TimeUnit timeUnit)
<T> com.google.common.util.concurrent.ListenableFuture<T>	retry(com.google.common.base.Supplier<com.google.common.util.concurrent.ListenableFuture<T>> code, int retries, long delay, TimeUnit timeUnit, com.google.common.base.Predicate<T> retryCondition)
private <T> void	startRetry(com.google.common.util.concurrent.SettableFuture<T> future, com.google.common.base.Supplier<com.google.common.util.concurrent.ListenableFuture<T>> code, int retries, long delay, TimeUnit timeUnit, com.google.common.base.Predicate<T> retryCondition)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_DELAY_MILLIS

public static final long DEFAULT_DELAY_MILLIS

See Also:

Constant Field Values

executorService

private final ScheduledExecutorService executorService

Constructor Detail

AsyncRetrier

private AsyncRetrier(ScheduledExecutorService executorService)

Method Detail

create

public static AsyncRetrier create(ScheduledExecutorService sleeper)

retry

public <T> com.google.common.util.concurrent.ListenableFuture<T> retry(com.google.common.base.Supplier<com.google.common.util.concurrent.ListenableFuture<T>> code,
                                                                       int retries)

retry

public <T> com.google.common.util.concurrent.ListenableFuture<T> retry(com.google.common.base.Supplier<com.google.common.util.concurrent.ListenableFuture<T>> code,
                                                                       int retries,
                                                                       long delayMillis)

retry

public <T> com.google.common.util.concurrent.ListenableFuture<T> retry(com.google.common.base.Supplier<com.google.common.util.concurrent.ListenableFuture<T>> code,
                                                                       int retries,
                                                                       long delay,
                                                                       TimeUnit timeUnit)

retry

public <T> com.google.common.util.concurrent.ListenableFuture<T> retry(com.google.common.base.Supplier<com.google.common.util.concurrent.ListenableFuture<T>> code,
                                                                       int retries,
                                                                       long delay,
                                                                       TimeUnit timeUnit,
                                                                       com.google.common.base.Predicate<T> retryCondition)

startRetry

private <T> void startRetry(com.google.common.util.concurrent.SettableFuture<T> future,
                            com.google.common.base.Supplier<com.google.common.util.concurrent.ListenableFuture<T>> code,
                            int retries,
                            long delay,
                            TimeUnit timeUnit,
                            com.google.common.base.Predicate<T> retryCondition)

handleFailure

private <T> void handleFailure(com.google.common.util.concurrent.SettableFuture<T> future,
                               com.google.common.base.Supplier<com.google.common.util.concurrent.ListenableFuture<T>> code,
                               int retries,
                               long delay,
                               TimeUnit timeUnit,
                               com.google.common.base.Predicate<T> retryCondition,
                               Throwable t)