org.axonframework.extensions.amqp.eventhandling

Class DefaultAMQPMessageConverter

java.lang.Object

org.axonframework.extensions.amqp.eventhandling.DefaultAMQPMessageConverter

All Implemented Interfaces:

AMQPMessageConverter

public class DefaultAMQPMessageConverter
extends Object
implements AMQPMessageConverter

Default implementation of the AMQPMessageConverter interface. This implementation will suffice in most cases. It passes all meta-data entries as headers (with 'axon-metadata-' prefix) to the message. Other message-specific attributes are also added as meta data. The message payload is serialized using the configured serializer and passed as the message body.

Author:

Allard Buijze

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DefaultAMQPMessageConverter.Builder Builder class to instantiate a DefaultAMQPMessageConverter.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DefaultAMQPMessageConverter(DefaultAMQPMessageConverter.Builder builder) Instantiate a DefaultAMQPMessageConverter based on the fields contained in the DefaultAMQPMessageConverter.Builder.

Method Summary

Modifier and Type	Method and Description
static DefaultAMQPMessageConverter.Builder	builder() Instantiate a Builder to be able to create a DefaultAMQPMessageConverter.
AMQPMessage	createAMQPMessage(org.axonframework.eventhandling.EventMessage<?> eventMessage) Creates an AMQPMessage from given eventMessage.
Optional<org.axonframework.eventhandling.EventMessage<?>>	readAMQPMessage(byte[] messageBody, Map<String,Object> headers) Reconstruct an EventMessage from the given messageBody and headers.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultAMQPMessageConverter

protected DefaultAMQPMessageConverter(DefaultAMQPMessageConverter.Builder builder)

Instantiate a DefaultAMQPMessageConverter based on the fields contained in the DefaultAMQPMessageConverter.Builder. The RoutingKeyResolver is defaulted to a PackageRoutingKeyResolver and the durable field defaults to true. The Serializer is a hard requirement and thus should be provided.

Will validate that the Serializer and RoutingKeyResolver are not null, and will throw an AxonConfigurationException if for either of them this holds.

Parameters:

builder - the DefaultAMQPMessageConverter.Builder used to instantiate a DefaultAMQPMessageConverter instance

Method Detail

builder

public static DefaultAMQPMessageConverter.Builder builder()

Instantiate a Builder to be able to create a DefaultAMQPMessageConverter. The RoutingKeyResolver is defaulted to a PackageRoutingKeyResolver and the durable field defaults to true. The Serializer is a hard requirement and as such should be provided.

Returns:

a Builder to be able to create a DefaultAMQPMessageConverter.

createAMQPMessage

public AMQPMessage createAMQPMessage(org.axonframework.eventhandling.EventMessage<?> eventMessage)

Description copied from interface: AMQPMessageConverter

Creates an AMQPMessage from given eventMessage.

Specified by:

createAMQPMessage in interface AMQPMessageConverter

Parameters:

eventMessage - The EventMessage to create the AMQP Message from

Returns:

an AMQP Message containing the data and characteristics of the Message to send to the AMQP Message Broker.

readAMQPMessage

public Optional<org.axonframework.eventhandling.EventMessage<?>> readAMQPMessage(byte[] messageBody,
                                                                                 Map<String,Object> headers)

Description copied from interface: AMQPMessageConverter

Reconstruct an EventMessage from the given messageBody and headers. The returned optional resolves to a message if the given input parameters represented a correct event message.

Specified by:

readAMQPMessage in interface AMQPMessageConverter

Parameters:

messageBody - The body of the AMQP Message

headers - The headers attached to the AMQP Message

Returns:

The Event Message to publish on the local event processors