Package org.axonframework.eventhandling

Class GenericTrackedEventMessage<T>

java.lang.Object

org.axonframework.messaging.MessageDecorator<T>

org.axonframework.eventhandling.GenericEventMessage<T>

org.axonframework.eventhandling.GenericTrackedEventMessage<T>

Type Parameters:

T - The type of payload contained in this Message

All Implemented Interfaces:

Serializable, EventMessage<T>, TrackedEventMessage<T>, Message<T>

public class GenericTrackedEventMessage<T>
extends GenericEventMessage<T>
implements TrackedEventMessage<T>

Generic implementation of a TrackedEventMessage.

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.axonframework.eventhandling.GenericEventMessage

clock

Constructor Summary

Constructors

Modifier	Constructor	Description
	GenericTrackedEventMessage(TrackingToken trackingToken, EventMessage<T> delegate)	Creates a GenericTrackedEventMessage with given trackingToken and delegate event message.
protected	GenericTrackedEventMessage(TrackingToken trackingToken, Message<T> delegate, Instant timestamp)	Initializes a GenericTrackedEventMessage with given message as delegate and given timestamp.
	GenericTrackedEventMessage(TrackingToken trackingToken, Message<T> delegate, Supplier<Instant> timestamp)	Creates a GenericTrackedEventMessage with given trackingToken and delegate event message.

Method Summary

Modifier and Type	Method	Description
protected void	describeTo(StringBuilder stringBuilder)	Describe the message specific properties to the given stringBuilder.
protected String	describeType()	Describe the type of message, used in MessageDecorator.toString().
TrackingToken	trackingToken()	Returns the TrackingToken of the event message.
GenericTrackedEventMessage<T>	withTrackingToken(TrackingToken trackingToken)	Creates a copy of this message with the given trackingToken to replace the one in this message.

Methods inherited from class org.axonframework.eventhandling.GenericEventMessage

andMetaData, asEventMessage, getTimestamp, withMetaData

Methods inherited from class org.axonframework.messaging.MessageDecorator

getDelegate, getIdentifier, getMetaData, getPayload, getPayloadType, serializeMetaData, serializePayload, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.axonframework.eventhandling.EventMessage

andMetaData, getIdentifier, getTimestamp, withMetaData

Methods inherited from interface org.axonframework.messaging.Message

getMetaData, getPayload, getPayloadType, serializeMetaData, serializePayload

Constructor Details

GenericTrackedEventMessage

public GenericTrackedEventMessage(TrackingToken trackingToken,
 EventMessage<T> delegate)

Creates a GenericTrackedEventMessage with given trackingToken and delegate event message.

Parameters:

trackingToken - tracking token of the event

delegate - delegate message containing payload, metadata, identifier and timestamp

GenericTrackedEventMessage

public GenericTrackedEventMessage(TrackingToken trackingToken,
 Message<T> delegate,
 Supplier<Instant> timestamp)

Creates a GenericTrackedEventMessage with given trackingToken and delegate event message. The timestamp of the event is supplied lazily to prevent unnecessary deserialization of the timestamp.

Parameters:

trackingToken - tracking token of the event

delegate - delegate message containing payload, metadata, identifier and timestamp

timestamp - supplier of the message's timestamp

GenericTrackedEventMessage

protected GenericTrackedEventMessage(TrackingToken trackingToken,
 Message<T> delegate,
 Instant timestamp)

Initializes a GenericTrackedEventMessage with given message as delegate and given timestamp. The given message will be used supply the payload, metadata and identifier of the resulting event message.

Parameters:

trackingToken - the tracking token of the resulting message

delegate - the message that will be used used as delegate

timestamp - the timestamp of the resulting event message

Method Details

trackingToken

public TrackingToken trackingToken()

Description copied from interface: TrackedEventMessage

Returns the TrackingToken of the event message.

Specified by:

trackingToken in interface TrackedEventMessage<T>

Returns:

the tracking token of the event

describeTo

protected void describeTo(StringBuilder stringBuilder)

Description copied from class: MessageDecorator

Describe the message specific properties to the given stringBuilder. Subclasses should override this method, calling the super method and appending their own properties to the end (or beginning).

As convention, String values should be enclosed in single quotes, Objects in curly brackets and numeric values may be appended without enclosing. All properties should be preceded by a comma when appending, or finish with a comma when prefixing values.

Overrides:

describeTo in class GenericEventMessage<T>

Parameters:

stringBuilder - the builder to append data to

withTrackingToken

public GenericTrackedEventMessage<T> withTrackingToken(TrackingToken trackingToken)

Description copied from interface: TrackedEventMessage

Creates a copy of this message with the given trackingToken to replace the one in this message.

This method is useful in case streams are modified (combined, split), and the tokens of the combined stream are different than the originating stream.

Specified by:

withTrackingToken in interface TrackedEventMessage<T>

Parameters:

trackingToken - The tracking token to replace

Returns:

a new instance of a message with a different tracking token

describeType

protected String describeType()

Description copied from class: MessageDecorator

Describe the type of message, used in MessageDecorator.toString().

Defaults to the simple class name of the actual instance.

Overrides:

describeType in class GenericEventMessage<T>

Returns:

the type of message