org.axonframework.messaging

Class AbstractMessage<T>

java.lang.Object

org.axonframework.messaging.AbstractMessage<T>

All Implemented Interfaces:

Serializable, Message<T>

Direct Known Subclasses:

GenericMessage, SerializedMessage

public abstract class AbstractMessage<T>
extends Object
implements Message<T>

Abstract base class for Messages.

Author:

Rene de Waele

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
AbstractMessage(String identifier) Initializes a new message with given identifier.

Method Summary

Modifier and Type	Method and Description
Message<T>	andMetaData(Map<String,?> metaData) Returns a copy of this Message with it MetaData merged with the given metaData.
String	getIdentifier() Returns the identifier of this message.
Message<T>	withMetaData(Map<String,?> metaData) Returns a copy of this Message with the given metaData.
protected abstract Message<T>	withMetaData(MetaData metaData) Returns a new message instance with the same payload and properties as this message but given metaData.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.axonframework.messaging.Message

getMetaData, getPayload, getPayloadType

Constructor Detail

AbstractMessage

public AbstractMessage(String identifier)

Initializes a new message with given identifier.

Parameters:

identifier - the message identifier

Method Detail

getIdentifier

public String getIdentifier()

Description copied from interface: Message

Returns the identifier of this message. Two messages with the same identifiers should be interpreted as different representations of the same conceptual message. In such case, the meta-data may be different for both representations. The payload may be identical.

Specified by:

getIdentifier in interface Message<T>

Returns:

the unique identifier of this message

withMetaData

public Message<T> withMetaData(Map<String,?> metaData)

Description copied from interface: Message

Returns a copy of this Message with the given metaData. The payload remains unchanged.

While the implementation returned may be different than the implementation of this, implementations must take special care in returning the same type of Message (e.g. EventMessage, DomainEventMessage) to prevent errors further downstream.

Specified by:

withMetaData in interface Message<T>

Parameters:

metaData - The new MetaData for the Message

Returns:

a copy of this message with the given MetaData

andMetaData

public Message<T> andMetaData(Map<String,?> metaData)

Description copied from interface: Message

Returns a copy of this Message with it MetaData merged with the given metaData. The payload remains unchanged.

Specified by:

andMetaData in interface Message<T>

Parameters:

metaData - The MetaData to merge with

Returns:

a copy of this message with the given MetaData

withMetaData

protected abstract Message<T> withMetaData(MetaData metaData)

Returns a new message instance with the same payload and properties as this message but given metaData.

Parameters:

metaData - The metadata in the new message

Returns:

a copy of this instance with given metadata