Package io.atleon.rabbitmq

Class AloRabbitMQReceiver<T>

java.lang.Object

io.atleon.rabbitmq.AloRabbitMQReceiver<T>

Type Parameters:

T - Inbound message deserialized body type

public class AloRabbitMQReceiver<T>
extends Object

A reactive RabbitMQ receiver with at-least-once semantics for consuming messages from a queue in a RabbitMQ cluster.

Note that AloDecorators applied via AloDecoratorConfig.DECORATOR_TYPES_CONFIG must be implementations of AloReceivedRabbitMQMessageDecorator.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AloRabbitMQReceiver.NackStrategy	Deprecated. Use NACKNOWLEDGER_TYPE_EMIT, NACKNOWLEDGER_TYPE_REQUEUE, or NACKNOWLEDGER_TYPE_DISCARD

Field Summary

Fields

Modifier and Type	Field	Description
static String	BODY_DESERIALIZER_CONFIG	An implementation of BodyDeserializer used to deserialized message bodies
static String	CONFIG_PREFIX	Prefix used on all AloRabbitMQReceiver-specific configurations
static String	ERROR_EMISSION_TIMEOUT_CONFIG	When negative acknowledgement results in emitting the corresponding error, this configures the timeout on successfully emitting that error.
static String	NACK_STRATEGY_CONFIG	Deprecated. Use NACKNOWLEDGER_TYPE_CONFIG
static String	NACKNOWLEDGER_TYPE_CONFIG	Configures the behavior of negatively acknowledging SQS Messages.
static String	NACKNOWLEDGER_TYPE_DISCARD
static String	NACKNOWLEDGER_TYPE_EMIT
static String	NACKNOWLEDGER_TYPE_REQUEUE
static String	QOS_CONFIG	The maximum allowed number unacknowledged messages (per subscription)

Method Summary

Modifier and Type	Method	Description
static <T> AloRabbitMQReceiver<T>	from(RabbitMQConfigSource configSource)	Creates a new AloRabbitMQReceiver from the provided RabbitMQConfigSource
io.atleon.core.AloFlux<T>	receiveAloBodies(String queue)	Creates a Publisher of Alo items referencing deserialized RabbitMQ message bodies wrapped as an AloFlux.
io.atleon.core.AloFlux<ReceivedRabbitMQMessage<T>>	receiveAloMessages(String queue)	Creates a Publisher of Alo items referencing ReceivedRabbitMQMessages wrapped as an AloFlux.

Methods inherited from class java.lang.Object

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

Field Detail

CONFIG_PREFIX

public static final String CONFIG_PREFIX

Prefix used on all AloRabbitMQReceiver-specific configurations

See Also:

Constant Field Values

QOS_CONFIG

public static final String QOS_CONFIG

The maximum allowed number unacknowledged messages (per subscription)

See Also:

Constant Field Values

BODY_DESERIALIZER_CONFIG

public static final String BODY_DESERIALIZER_CONFIG

An implementation of BodyDeserializer used to deserialized message bodies

See Also:

Constant Field Values

NACK_STRATEGY_CONFIG

@Deprecated
public static final String NACK_STRATEGY_CONFIG

Deprecated.

Use NACKNOWLEDGER_TYPE_CONFIG

See Also:

Constant Field Values

NACKNOWLEDGER_TYPE_CONFIG

public static final String NACKNOWLEDGER_TYPE_CONFIG

Configures the behavior of negatively acknowledging SQS Messages. Several simple types are available including "emit", where the associated error is emitted in to the pipeline, "requeue" which re-queues the associated message such that it is re-received in the future, and "discard" which causes the message to be dropped or routed to a dead-letter queue, if configured. Any other non-predefined value is treated as a qualified class name of an implementation of NacknowledgerFactory which allows more fine-grained control over what happens when a RabbitMQ Message is negatively acknowledged. Defaults to "emit".

See Also:

Constant Field Values

NACKNOWLEDGER_TYPE_EMIT

public static final String NACKNOWLEDGER_TYPE_EMIT

See Also:

Constant Field Values

NACKNOWLEDGER_TYPE_REQUEUE

public static final String NACKNOWLEDGER_TYPE_REQUEUE

See Also:

Constant Field Values

NACKNOWLEDGER_TYPE_DISCARD

public static final String NACKNOWLEDGER_TYPE_DISCARD

See Also:

Constant Field Values

ERROR_EMISSION_TIMEOUT_CONFIG

public static final String ERROR_EMISSION_TIMEOUT_CONFIG

When negative acknowledgement results in emitting the corresponding error, this configures the timeout on successfully emitting that error.

See Also:

Constant Field Values

Method Detail

from

public static <T> AloRabbitMQReceiver<T> from(RabbitMQConfigSource configSource)

Creates a new AloRabbitMQReceiver from the provided RabbitMQConfigSource

Type Parameters:

T - The types of deserialized message bodies contained in received messages

Parameters:

configSource - The reactive source of RabbitMQConfig

Returns:

A new AloRabbitMQReceiver

receiveAloBodies

public io.atleon.core.AloFlux<T> receiveAloBodies(String queue)

Creates a Publisher of Alo items referencing deserialized RabbitMQ message bodies wrapped as an AloFlux.

Parameters:

queue - The queue to subscribe to

Returns:

A Publisher of Alo items referencing deserialized RabbitMQ message bodies

receiveAloMessages

public io.atleon.core.AloFlux<ReceivedRabbitMQMessage<T>> receiveAloMessages(String queue)

Creates a Publisher of Alo items referencing ReceivedRabbitMQMessages wrapped as an AloFlux.

Parameters:

queue - The queue to subscribe to

Returns:

A Publisher of Alo items referencing ReceivedRabbitMQMessages