net.leanix.dropkit.amqp

Class QueueConsumer

java.lang.Object

com.rabbitmq.client.DefaultConsumer

net.leanix.dropkit.amqp.QueueConsumer

All Implemented Interfaces:

com.rabbitmq.client.Consumer

public abstract class QueueConsumer
extends com.rabbitmq.client.DefaultConsumer

Designed to consume from a single queue (holds the result from basicConsume as registeredConsumerTag).

Constructor Summary

Constructors

Constructor and Description
QueueConsumer(String queueName, com.rabbitmq.client.Channel channel, ConsumerRegistry registry)

Method Summary

Modifier and Type	Method and Description
long	getLastUsed()
String	getQueueName()
String	getRegisteredConsumerTag()
void	handleCancel(String consumerTag)
void	handleCancelOk(String consumerTag)
void	handleConsumeOk(String consumerTag)
void	handleDelivery(String consumerTag, com.rabbitmq.client.Envelope env, com.rabbitmq.client.AMQP.BasicProperties props, byte[] body)
void	handleShutdownSignal(String consumerTag, com.rabbitmq.client.ShutdownSignalException e)
void	setRegisteredConsumerTag(String consumerTag)
void	setUnregistering()
abstract void	simpleHandle(String body) This method processes the message which comes from rabbitMQ and contains the business logic for each consumer.

Methods inherited from class com.rabbitmq.client.DefaultConsumer

getChannel, getConsumerTag, handleRecoverOk

Methods inherited from class java.lang.Object

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

Constructor Detail

QueueConsumer

public QueueConsumer(String queueName,
                     com.rabbitmq.client.Channel channel,
                     ConsumerRegistry registry)

Method Detail

simpleHandle

public abstract void simpleHandle(String body)
                           throws IOException

This method processes the message which comes from rabbitMQ and contains the business logic for each consumer.

In case that any exception is thrown within this message, the corresponding message will NOT be acknowledged in rabbitMQ and therefore simpleHandle(String) will be called with the same message again. Only in case that the exception is a JsonMappingException, the message will be acknowledge in rabbitMQ and will not processed again.

So, please avoid throwing exceptions here, because this can end in dead loops in case of unprocessable messages.

Parameters:

body - The pure message in json format which comes from rabbitMQ

Throws:

IOException - An exception which causes that the message will NOT be acknowledge in rabbitMQ

getQueueName

public String getQueueName()

getRegisteredConsumerTag

public String getRegisteredConsumerTag()

setRegisteredConsumerTag

public void setRegisteredConsumerTag(String consumerTag)

setUnregistering

public void setUnregistering()

getLastUsed

public long getLastUsed()

handleDelivery

public void handleDelivery(String consumerTag,
                           com.rabbitmq.client.Envelope env,
                           com.rabbitmq.client.AMQP.BasicProperties props,
                           byte[] body)
                    throws IOException

Specified by:

handleDelivery in interface com.rabbitmq.client.Consumer

Overrides:

handleDelivery in class com.rabbitmq.client.DefaultConsumer

Throws:

IOException

handleConsumeOk

public void handleConsumeOk(String consumerTag)

Specified by:

handleConsumeOk in interface com.rabbitmq.client.Consumer

Overrides:

handleConsumeOk in class com.rabbitmq.client.DefaultConsumer

handleCancelOk

public void handleCancelOk(String consumerTag)

Specified by:

handleCancelOk in interface com.rabbitmq.client.Consumer

Overrides:

handleCancelOk in class com.rabbitmq.client.DefaultConsumer

handleCancel

public void handleCancel(String consumerTag)

Specified by:

handleCancel in interface com.rabbitmq.client.Consumer

Overrides:

handleCancel in class com.rabbitmq.client.DefaultConsumer

handleShutdownSignal

public void handleShutdownSignal(String consumerTag,
                                 com.rabbitmq.client.ShutdownSignalException e)

Specified by:

handleShutdownSignal in interface com.rabbitmq.client.Consumer

Overrides:

handleShutdownSignal in class com.rabbitmq.client.DefaultConsumer