Module dk.cloudcreate.essentials.components.foundation

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

Class QueuePollingOptimizer.SimpleQueuePollingOptimizer

java.lang.Object

dk.cloudcreate.essentials.components.foundation.messaging.queue.QueuePollingOptimizer.SimpleQueuePollingOptimizer

All Implemented Interfaces:

DurableQueueConsumerNotifications, QueuePollingOptimizer

Enclosing interface:

QueuePollingOptimizer

public static class QueuePollingOptimizer.SimpleQueuePollingOptimizer
extends Object
implements QueuePollingOptimizer

The QueuePollingOptimizer.SimpleQueuePollingOptimizer supports extending the polling sleep time (i.e. the time between calls to DurableQueues.getNextMessageReadyForDelivery(GetNextMessageReadyForDelivery)) up until a given threshold.

Nested Class Summary

Nested classes/interfaces inherited from interface dk.cloudcreate.essentials.components.foundation.messaging.queue.QueuePollingOptimizer

QueuePollingOptimizer.SimpleQueuePollingOptimizer

Constructor Summary

Constructors

Constructor	Description
SimpleQueuePollingOptimizer(ConsumeFromQueue consumeFromQueue, long delayIncrementMs, long maxDelayMs)	Create a new QueuePollingOptimizer.SimpleQueuePollingOptimizer

Method Summary

Modifier and Type	Method	Description
void	messageAdded(QueuedMessage queuedMessage)	Notification from the DurableQueues implementation that a new message has been added to the Queue that the given DurableQueueConsumer is consuming messages from Note: A consumer still needs to use DurableQueues.getNextMessageReadyForDelivery(GetNextMessageReadyForDelivery) to ensure proper message locking of messages that they are processing
void	queuePollingReturnedMessage(QueuedMessage queuedMessage)
void	queuePollingReturnedNoMessages()
boolean	shouldSkipPolling()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleQueuePollingOptimizer

public SimpleQueuePollingOptimizer(ConsumeFromQueue consumeFromQueue,
                                   long delayIncrementMs,
                                   long maxDelayMs)

Create a new QueuePollingOptimizer.SimpleQueuePollingOptimizer

Parameters:

consumeFromQueue - the ConsumeFromQueue command

delayIncrementMs - when ever QueuePollingOptimizer.queuePollingReturnedNoMessages() is called the delay between calls to DurableQueues.getNextMessageReadyForDelivery(GetNextMessageReadyForDelivery) will be increased by delayIncrementMs
If DurableQueueConsumerNotifications.messageAdded(QueuedMessage) or QueuePollingOptimizer.queuePollingReturnedMessage(QueuedMessage) all called, then the delay between calls to DurableQueues.getNextMessageReadyForDelivery(GetNextMessageReadyForDelivery) is reset back to ConsumeFromQueue.getPollingInterval()

maxDelayMs - The overall delay between calls to DurableQueues.getNextMessageReadyForDelivery(GetNextMessageReadyForDelivery) cannot exceed this value

Method Detail

queuePollingReturnedNoMessages

public void queuePollingReturnedNoMessages()

Specified by:

queuePollingReturnedNoMessages in interface QueuePollingOptimizer

queuePollingReturnedMessage

public void queuePollingReturnedMessage(QueuedMessage queuedMessage)

Specified by:

queuePollingReturnedMessage in interface QueuePollingOptimizer

shouldSkipPolling

public boolean shouldSkipPolling()

Specified by:

shouldSkipPolling in interface QueuePollingOptimizer

messageAdded

public void messageAdded(QueuedMessage queuedMessage)

Description copied from interface: DurableQueueConsumerNotifications

Notification from the DurableQueues implementation that a new message has been added to the Queue that the given DurableQueueConsumer is consuming messages from
Note: A consumer still needs to use DurableQueues.getNextMessageReadyForDelivery(GetNextMessageReadyForDelivery) to ensure proper message locking of messages that they are processing

Specified by:

messageAdded in interface DurableQueueConsumerNotifications

Parameters:

queuedMessage - the message added

toString

public String toString()

Overrides:

toString in class Object