Module dk.cloudcreate.essentials.components.foundation

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

Class DefaultDurableQueueConsumer<DURABLE_QUEUES extends DurableQueues,UOW extends UnitOfWork,UOW_FACTORY extends UnitOfWorkFactory<UOW>>

java.lang.Object

dk.cloudcreate.essentials.components.foundation.messaging.queue.DefaultDurableQueueConsumer<DURABLE_QUEUES,UOW,UOW_FACTORY>

Type Parameters:

DURABLE_QUEUES - the concrete type of DurableQueues implementation

UOW - the UnitOfWork type

UOW_FACTORY - the UnitOfWorkFactory type

All Implemented Interfaces:

Lifecycle, DurableQueueConsumer, DurableQueueConsumerNotifications

public class DefaultDurableQueueConsumer<DURABLE_QUEUES extends DurableQueues,UOW extends UnitOfWork,UOW_FACTORY extends UnitOfWorkFactory<UOW>>
extends Object
implements DurableQueueConsumer, DurableQueueConsumerNotifications

The default DurableQueueConsumer which provides basic implementation (including retrying messages in case of failure, polling interval optimization, etc.)
Log levels of interest:

 dk.cloudcreate.essentials.components.foundation.messaging.queue.DurableQueueConsumer
 dk.cloudcreate.essentials.components.foundation.messaging.queue.DurableQueueConsumer.MessageHandlingFailures
 

Field Summary

Fields

Modifier and Type	Field	Description
static final org.slf4j.Logger	LOG
static final org.slf4j.Logger	MESSAGE_HANDLING_FAILURE_LOG
static final Runnable	NO_POSTPROCESSING_AFTER_PROCESS_NEXT_MESSAGE
final QueueName	queueName

Constructor Summary

Constructors

Constructor	Description
DefaultDurableQueueConsumer(ConsumeFromQueue consumeFromQueue, UOW_FACTORY unitOfWorkFactory, DURABLE_QUEUES durableQueues, Consumer<DurableQueueConsumer> removeDurableQueueConsumer, long pollingIntervalMs, QueuePollingOptimizer queuePollingOptimizer)

Method Summary

Modifier and Type	Method	Description
void	cancel()
boolean	isStarted()	Returns true if the process is started
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
QueueName	queueName()
void	start()	Start the processing.
void	stop()	Stop the processing.
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

LOG

public static final org.slf4j.Logger LOG

MESSAGE_HANDLING_FAILURE_LOG

public static final org.slf4j.Logger MESSAGE_HANDLING_FAILURE_LOG

NO_POSTPROCESSING_AFTER_PROCESS_NEXT_MESSAGE

public static final Runnable NO_POSTPROCESSING_AFTER_PROCESS_NEXT_MESSAGE

queueName

public final QueueName queueName

Constructor Details

DefaultDurableQueueConsumer

public DefaultDurableQueueConsumer(ConsumeFromQueue consumeFromQueue,
 UOW_FACTORY unitOfWorkFactory,
 DURABLE_QUEUES durableQueues,
 Consumer<DurableQueueConsumer> removeDurableQueueConsumer,
 long pollingIntervalMs,
 QueuePollingOptimizer queuePollingOptimizer)

Method Details

start

public void start()

Description copied from interface: Lifecycle

Start the processing. This operation must be idempotent, such that duplicate calls to Lifecycle.start() for an already started process (where Lifecycle.isStarted() returns true) is ignored

Specified by:

start in interface Lifecycle

stop

public void stop()

Description copied from interface: Lifecycle

Stop the processing. This operation must be idempotent, such that duplicate calls to Lifecycle.stop() for an already stopped process (where Lifecycle.isStarted() returns false) is ignored

Specified by:

stop in interface Lifecycle

isStarted

public boolean isStarted()

Description copied from interface: Lifecycle

Returns true if the process is started

Specified by:

isStarted in interface Lifecycle

Returns:

true if the process is started otherwise false

queueName

public QueueName queueName()

Specified by:

queueName in interface DurableQueueConsumer

cancel

public void cancel()

Specified by:

cancel in interface DurableQueueConsumer

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