Module dk.cloudcreate.essentials.components.foundation

Package dk.cloudcreate.essentials.components.foundation.messaging

Class RedeliveryPolicy

java.lang.Object

dk.cloudcreate.essentials.components.foundation.messaging.RedeliveryPolicy

public class RedeliveryPolicy
extends Object

In case the message delivery, handled by the DurableQueueConsumer, experiences an error/exception, then the RedeliveryPolicy determines, with the aid of the MessageDeliveryErrorHandler and the provided delivery settings, IF a Message should be retried (DurableQueues.retryMessage(RetryMessage) or if it's going to be marked as a Poison-Message/Dead-Letter-Message (DurableQueues.markAsDeadLetterMessage(MarkAsDeadLetterMessage))

See Also:

• builder()
• exponentialBackoff()
• linearBackoff()
• fixedBackoff()

Field Summary

Fields

Modifier and Type	Field	Description
final MessageDeliveryErrorHandler	deliveryErrorHandler
final Duration	followupRedeliveryDelay
final double	followupRedeliveryDelayMultiplier
final Duration	initialRedeliveryDelay
final Duration	maximumFollowupRedeliveryThreshold
final int	maximumNumberOfRedeliveries

Constructor Summary

Constructors

Constructor	Description
RedeliveryPolicy(Duration initialRedeliveryDelay, Duration followupRedeliveryDelay, double followupRedeliveryDelayMultiplier, Duration maximumFollowupRedeliveryDelayThreshold, int maximumNumberOfRedeliveries, MessageDeliveryErrorHandler deliveryErrorHandler)

Method Summary

Modifier and Type	Method	Description
static RedeliveryPolicyBuilder	builder()	Create a generic builder for defining a RedeliveryPolicy
Duration	calculateNextRedeliveryDelay(int currentNumberOfRedeliveryAttempts)
boolean	equals(Object o)
static ExponentialBackoffBuilder	exponentialBackoff()	Create a builder for defining a RedeliveryPolicy that allows for defining an Exponential Backoff strategy
static RedeliveryPolicy	exponentialBackoff(Duration initialRedeliveryDelay, Duration followupRedeliveryDelay, double followupRedeliveryDelayMultiplier, Duration maximumFollowupRedeliveryDelayThreshold, int maximumNumberOfRedeliveries)
static FixedBackoffBuilder	fixedBackoff()	Create a builder for defining a RedeliveryPolicy with a Fixed Backoff strategy
static RedeliveryPolicy	fixedBackoff(Duration redeliveryDelay, int maximumNumberOfRedeliveries)
int	hashCode()
boolean	isPermanentError(QueuedMessage queuedMessage, Exception error)
static LinearBackoffBuilder	linearBackoff()	Create a builder for defining a RedeliveryPolicy with a Linear Backoff strategy
static RedeliveryPolicy	linearBackoff(Duration redeliveryDelay, Duration maximumFollowupRedeliveryDelayThreshold, int maximumNumberOfRedeliveries)
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

initialRedeliveryDelay

public final Duration initialRedeliveryDelay

followupRedeliveryDelay

public final Duration followupRedeliveryDelay

followupRedeliveryDelayMultiplier

public final double followupRedeliveryDelayMultiplier

maximumFollowupRedeliveryThreshold

public final Duration maximumFollowupRedeliveryThreshold

maximumNumberOfRedeliveries

public final int maximumNumberOfRedeliveries

deliveryErrorHandler

public final MessageDeliveryErrorHandler deliveryErrorHandler

Constructor Details

RedeliveryPolicy

public RedeliveryPolicy(Duration initialRedeliveryDelay,
 Duration followupRedeliveryDelay,
 double followupRedeliveryDelayMultiplier,
 Duration maximumFollowupRedeliveryDelayThreshold,
 int maximumNumberOfRedeliveries,
 MessageDeliveryErrorHandler deliveryErrorHandler)

Method Details

builder

public static RedeliveryPolicyBuilder builder()

Create a generic builder for defining a RedeliveryPolicy

Returns:

a generic builder for defining a RedeliveryPolicy

exponentialBackoff

public static ExponentialBackoffBuilder exponentialBackoff()

Create a builder for defining a RedeliveryPolicy that allows for defining an Exponential Backoff strategy

Returns:

a builder for defining a RedeliveryPolicy that allows for defining an Exponential Backoff strategy

linearBackoff

public static LinearBackoffBuilder linearBackoff()

Create a builder for defining a RedeliveryPolicy with a Linear Backoff strategy

Returns:

a builder for defining a RedeliveryPolicy with a Linear Backoff strategy

fixedBackoff

public static FixedBackoffBuilder fixedBackoff()

Create a builder for defining a RedeliveryPolicy with a Fixed Backoff strategy

Returns:

a builder for defining a RedeliveryPolicy with a Fixed Backoff strategy

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

calculateNextRedeliveryDelay

public Duration calculateNextRedeliveryDelay(int currentNumberOfRedeliveryAttempts)

fixedBackoff

public static RedeliveryPolicy fixedBackoff(Duration redeliveryDelay,
 int maximumNumberOfRedeliveries)

linearBackoff

public static RedeliveryPolicy linearBackoff(Duration redeliveryDelay,
 Duration maximumFollowupRedeliveryDelayThreshold,
 int maximumNumberOfRedeliveries)

exponentialBackoff

public static RedeliveryPolicy exponentialBackoff(Duration initialRedeliveryDelay,
 Duration followupRedeliveryDelay,
 double followupRedeliveryDelayMultiplier,
 Duration maximumFollowupRedeliveryDelayThreshold,
 int maximumNumberOfRedeliveries)

isPermanentError

public boolean isPermanentError(QueuedMessage queuedMessage,
 Exception error)