Package org.kiwiproject.retry

Class KiwiRetryerException

java.lang.Object

java.lang.Throwable

java.lang.Exception

java.lang.RuntimeException

org.kiwiproject.retry.KiwiRetryerException

All Implemented Interfaces:

Serializable

public class KiwiRetryerException
extends RuntimeException

Exception thrown by KiwiRetryer.

It will wrap either a RetryException or an InterruptedException.

A RetryException indicates that all attempts failed, while an InterruptedException occurs when a thread is interrupted. Note specifically that failed attempts may have failed due to a specific result or because an exception was thrown. In other words, a Retryer can be configured with result as well as exception predicates to trigger a retry.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
KiwiRetryerException(String message, Exception cause)	Construct an instance with the given information.

Method Summary

Modifier and Type	Method	Description
Optional<org.kiwiproject.retry.Attempt<?>>	getLastAttempt()	If the underlying cause is a RetryException return the last failed Attempt.
OptionalInt	getNumberOfFailedAttempts()	If the underlying cause is a RetryException return the number of failed Attempts.
boolean	isCauseInterruptedException()
boolean	isCauseRetryException()
Optional<Throwable>	unwrap()	Unwrap the given KiwiRetryerException to reveal the underlying exception that caused it.
Optional<org.kiwiproject.retry.RetryException>	unwrapAsRetryException()	If the underlying cause is a RetryException, unwrap it.
Optional<Throwable>	unwrapFully()	Unwrap the given KiwiRetryerException to reveal the underlying exception that caused it.
static Optional<Throwable>	unwrapKiwiRetryerException(KiwiRetryerException kiwiRetryerEx)	Unwrap the given KiwiRetryerException to reveal the underlying exception that caused it.
static Optional<Throwable>	unwrapKiwiRetryerExceptionFully(KiwiRetryerException kiwiRetryerEx)	Unwrap the given KiwiRetryerException to reveal the underlying exception that caused it.

Methods inherited from class java.lang.Throwable

addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

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

Constructor Details

KiwiRetryerException

public KiwiRetryerException(String message,
 Exception cause)

Construct an instance with the given information.

Parameters:

message - the detail message

cause - the (non-null) cause of the failure (a RetryException or InterruptedException)

Throws:

IllegalArgumentException - if the cause is null, or is not a RetryException or InterruptedException

Method Details

unwrapKiwiRetryerException

public static Optional<Throwable> unwrapKiwiRetryerException(KiwiRetryerException kiwiRetryerEx)

Unwrap the given KiwiRetryerException to reveal the underlying exception that caused it.

Since it is possible for an Attempt to fail without an exception, this method returns an Optional to indicate there might not actually be an exception cause.

Parameters:

kiwiRetryerEx - the exception to unwrap

Returns:

the unwrapped cause

See Also:

• unwrapKiwiRetryerExceptionFully(KiwiRetryerException)

unwrapKiwiRetryerExceptionFully

public static Optional<Throwable> unwrapKiwiRetryerExceptionFully(KiwiRetryerException kiwiRetryerEx)

Unwrap the given KiwiRetryerException to reveal the underlying exception that caused it.

The difference between unwrapKiwiRetryerException(KiwiRetryerException) and this method and is that the former does not unwrap the RetryException, whereas the latter (this method) does.

Since it is possible for an attempt to fail without an exception, this method returns an Optional to indicate there might not actually be an exception cause.

Parameters:

kiwiRetryerEx - the exception to unwrap

Returns:

the fully unwrapped cause

unwrap

public Optional<Throwable> unwrap()

Unwrap the given KiwiRetryerException to reveal the underlying exception that caused it.

Returns:

the unwrapped cause

See Also:

• unwrapKiwiRetryerException(KiwiRetryerException)
• unwrapFully()

unwrapFully

public Optional<Throwable> unwrapFully()

Unwrap the given KiwiRetryerException to reveal the underlying exception that caused it.

Returns:

the fully unwrapped cause

See Also:

• unwrapKiwiRetryerExceptionFully(KiwiRetryerException)

isCauseRetryException

public boolean isCauseRetryException()

Returns:

true if the cause of this exception is a RetryException, otherwise false

isCauseInterruptedException

public boolean isCauseInterruptedException()

Returns:

true if the cause of this exception is an InterruptedException, otherwise false

getLastAttempt

public Optional<org.kiwiproject.retry.Attempt<?>> getLastAttempt()

If the underlying cause is a RetryException return the last failed Attempt.

Returns:

an Optional of the last failed Attempt

getNumberOfFailedAttempts

public OptionalInt getNumberOfFailedAttempts()

If the underlying cause is a RetryException return the number of failed Attempts.

Returns:

an OptionalInt of the number of failed attempts

unwrapAsRetryException

public Optional<org.kiwiproject.retry.RetryException> unwrapAsRetryException()

If the underlying cause is a RetryException, unwrap it.

Returns:

an Optional of the RetryException causing the retry failure