org.axonframework.commandhandling

Class GenericCommandMessage<T>

java.lang.Object

org.axonframework.messaging.MessageDecorator<T>

org.axonframework.commandhandling.GenericCommandMessage<T>

Type Parameters:

T - The type of payload contained in this Message

All Implemented Interfaces:

Serializable, CommandMessage<T>, Message<T>, SerializationAware

public class GenericCommandMessage<T>
extends MessageDecorator<T>
implements CommandMessage<T>

Implementation of the CommandMessage that takes all properties as constructor parameters.

Since:

2.0

Author:

Allard Buijze

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
GenericCommandMessage(Message<T> delegate, String commandName) Create a CommandMessage from the given delegate message containing payload, metadata and message identifier, and the given commandName.
GenericCommandMessage(T payload) Create a CommandMessage with the given command as payload and empty metaData
GenericCommandMessage(T payload, Map<String,?> metaData) Create a CommandMessage with the given command as payload.

Method Summary

Modifier and Type	Method and Description
GenericCommandMessage<T>	andMetaData(Map<String,?> metaData) Returns a copy of this CommandMessage with it MetaData merged with the given metaData.
static <C> CommandMessage<C>	asCommandMessage(Object command) Returns the given command as a CommandMessage.
String	getCommandName() Returns the name of the command to execute.
GenericCommandMessage<T>	withMetaData(Map<String,?> metaData) Returns a copy of this CommandMessage with the given metaData.

Methods inherited from class org.axonframework.messaging.MessageDecorator

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

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

getIdentifier, getMetaData, getPayload, getPayloadType

Constructor Detail

GenericCommandMessage

public GenericCommandMessage(T payload)

Create a CommandMessage with the given command as payload and empty metaData

Parameters:

payload - the payload for the Message

GenericCommandMessage

public GenericCommandMessage(T payload,
                             Map<String,?> metaData)

Create a CommandMessage with the given command as payload.

Parameters:

payload - the payload for the Message

metaData - The meta data for this message

GenericCommandMessage

public GenericCommandMessage(Message<T> delegate,
                             String commandName)

Create a CommandMessage from the given delegate message containing payload, metadata and message identifier, and the given commandName.

Parameters:

delegate - the delegate message

commandName - The name of the command

Method Detail

asCommandMessage

public static <C> CommandMessage<C> asCommandMessage(Object command)

Returns the given command as a CommandMessage. If command already implements CommandMessage, it is returned as-is. Otherwise, the given command is wrapped into a GenericCommandMessage as its payload.

Parameters:

command - the command to wrap as CommandMessage

Returns:

a CommandMessage containing given command as payload, or command if it already implements CommandMessage.

getCommandName

public String getCommandName()

Description copied from interface: CommandMessage

Returns the name of the command to execute. This is an indication of what should be done, using the payload as parameter.

Specified by:

getCommandName in interface CommandMessage<T>

Returns:

the name of the command

withMetaData

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

Description copied from interface: CommandMessage

Returns a copy of this CommandMessage 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 CommandMessage<T>

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 GenericCommandMessage<T> andMetaData(Map<String,?> metaData)

Description copied from interface: CommandMessage

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

Specified by:

andMetaData in interface CommandMessage<T>

Specified by:

andMetaData in interface Message<T>

Parameters:

metaData - The MetaData to merge with

Returns:

a copy of this message with the given MetaData