org.axonframework.queryhandling

Class GenericQueryMessage<T,R>

java.lang.Object

org.axonframework.messaging.MessageDecorator<T>

org.axonframework.queryhandling.GenericQueryMessage<T,R>

Type Parameters:

T - The type of payload expressing the query in this message

R - The type of response expected from this query

All Implemented Interfaces:

Serializable, Message<T>, QueryMessage<T,R>, SerializationAware

public class GenericQueryMessage<T,R>
extends MessageDecorator<T>
implements QueryMessage<T,R>

Generic implementation of the QueryMessage. Unless explicitly provided, it assumes the queryName of the message is the fully qualified class name of the message's payload.

Since:

3.1

Author:

Marc Gathier

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
GenericQueryMessage(Message<T> delegate, String queryName, Class<R> responseType) Initialize the Query Message, using given delegate as the carrier of payload and metadata and given queryName and expecting the given responseType.
GenericQueryMessage(T payload, Class<R> responseType) Initializes the message with the given payload and expected responseType.
GenericQueryMessage(T payload, String queryName, Class<R> responseType) Initializes the message with the given payload, queryName and expected responseType.

Method Summary

Modifier and Type	Method and Description
QueryMessage<T,R>	andMetaData(Map<String,?> metaData) Returns a copy of this Message with it MetaData merged with the given metaData.
String	getQueryName() Returns the name identifying the query to be executed.
Class<R>	getResponseType() The type of response expected by the sender of the query
QueryMessage<T,R>	withMetaData(Map<String,?> metaData) Returns a copy of this Message 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

GenericQueryMessage

public GenericQueryMessage(T payload,
                           Class<R> responseType)

Initializes the message with the given payload and expected responseType. The query name is set to the fully qualified class name of the payload.

Parameters:

payload - The payload expressing the query

responseType - The expected response type

GenericQueryMessage

public GenericQueryMessage(T payload,
                           String queryName,
                           Class<R> responseType)

Initializes the message with the given payload, queryName and expected responseType.

Parameters:

payload - The payload expressing the query

queryName - The name identifying the query to execute

responseType - The expected response type

GenericQueryMessage

public GenericQueryMessage(Message<T> delegate,
                           String queryName,
                           Class<R> responseType)

Initialize the Query Message, using given delegate as the carrier of payload and metadata and given queryName and expecting the given responseType.

Parameters:

delegate - The message containing the payload and meta data for this message

queryName - The name identifying the query to execute

responseType - The expected response type

Method Detail

getQueryName

public String getQueryName()

Description copied from interface: QueryMessage

Returns the name identifying the query to be executed.

Specified by:

getQueryName in interface QueryMessage<T,R>

Returns:

the name identifying the query to be executed.

getResponseType

public Class<R> getResponseType()

Description copied from interface: QueryMessage

The type of response expected by the sender of the query

Specified by:

getResponseType in interface QueryMessage<T,R>

Returns:

the type of response expected by the sender of the query

withMetaData

public QueryMessage<T,R> 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>

Specified by:

withMetaData in interface QueryMessage<T,R>

Parameters:

metaData - The new MetaData for the Message

Returns:

a copy of this message with the given MetaData

andMetaData

public QueryMessage<T,R> 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>

Specified by:

andMetaData in interface QueryMessage<T,R>

Parameters:

metaData - The MetaData to merge with

Returns:

a copy of this message with the given MetaData