org.axonframework.axonserver.connector.query

Class GrpcBackedResponseMessage<R>

java.lang.Object

org.axonframework.axonserver.connector.query.GrpcBackedResponseMessage<R>

Type Parameters:

R - a generic specifying the type of the QueryResponseMessage

All Implemented Interfaces:

Serializable, Message<R>, ResultMessage<R>, QueryResponseMessage<R>

public class GrpcBackedResponseMessage<R>
extends Object
implements QueryResponseMessage<R>

Wrapper that allows clients to access a gRPC QueryResponse as a QueryResponseMessage.

Since:

4.0

Author:

Marc Gathier

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
GrpcBackedResponseMessage(QueryResponse queryResponse, Serializer serializer) Instantiate a GrpcBackedResponseMessage with the given queryResponse, using the provided Serializer to be able to retrieve the payload and MetaData from it.

Method Summary

Modifier and Type	Method and Description
GrpcBackedResponseMessage<R>	andMetaData(Map<String,?> metaData) Returns a copy of this QueryResponseMessage with its MetaData merged with given metaData.
String	getIdentifier() Returns the identifier of this message.
MetaData	getMetaData() Returns the meta data for this event.
R	getPayload() Returns the payload of this Event.
Class<R>	getPayloadType() Returns the type of the payload.
boolean	isExceptional() Indicates whether the ResultMessage represents unsuccessful execution.
Optional<Throwable>	optionalExceptionResult() Returns the Exception in case of exceptional result message or an empty Optional in case of successful execution.
GrpcBackedResponseMessage<R>	withMetaData(Map<String,?> metaData) Returns a copy of this QueryResponseMessage with the 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.ResultMessage

exceptionResult, serializeExceptionResult

Methods inherited from interface org.axonframework.messaging.Message

serializeMetaData, serializePayload

Constructor Detail

GrpcBackedResponseMessage

public GrpcBackedResponseMessage(QueryResponse queryResponse,
                                 Serializer serializer)

Instantiate a GrpcBackedResponseMessage with the given queryResponse, using the provided Serializer to be able to retrieve the payload and MetaData from it.

Parameters:

queryResponse - the QueryResponse which is being wrapped as a QueryResponseMessage

serializer - the Serializer used to deserialize the payload and MetaData from the given queryResponse

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<R>

Returns:

the unique identifier of this message

getMetaData

public MetaData getMetaData()

Description copied from interface: Message

Returns the meta data for this event. This meta data is a collection of key-value pairs, where the key is a String, and the value is a serializable object.

Specified by:

getMetaData in interface Message<R>

Returns:

the meta data for this event

getPayload

public R getPayload()

Description copied from interface: Message

Returns the payload of this Event. The payload is the application-specific information.

Specified by:

getPayload in interface Message<R>

Returns:

the payload of this Event

getPayloadType

public Class<R> getPayloadType()

Description copied from interface: Message

Returns the type of the payload.

Is semantically equal to getPayload().getClass(), but allows implementations to optimize by using lazy loading or deserialization.

Specified by:

getPayloadType in interface Message<R>

Returns:

the type of payload.

isExceptional

public boolean isExceptional()

Description copied from interface: ResultMessage

Indicates whether the ResultMessage represents unsuccessful execution.

Specified by:

isExceptional in interface ResultMessage<R>

Returns:

true if execution was unsuccessful, false otherwise

optionalExceptionResult

public Optional<Throwable> optionalExceptionResult()

Description copied from interface: ResultMessage

Returns the Exception in case of exceptional result message or an empty Optional in case of successful execution.

Specified by:

optionalExceptionResult in interface ResultMessage<R>

Returns:

an Optional containing exception result or an empty Optional in case of a successful execution

withMetaData

public GrpcBackedResponseMessage<R> withMetaData(Map<String,?> metaData)

Description copied from interface: QueryResponseMessage

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

Specified by:

withMetaData in interface Message<R>

Specified by:

withMetaData in interface ResultMessage<R>

Specified by:

withMetaData in interface QueryResponseMessage<R>

Parameters:

metaData - The new MetaData for the QueryResponseMessage

Returns:

a copy of this message with the given MetaData

andMetaData

public GrpcBackedResponseMessage<R> andMetaData(Map<String,?> metaData)

Description copied from interface: QueryResponseMessage

Returns a copy of this QueryResponseMessage with its MetaData merged with given metaData. The payload remains unchanged.

Specified by:

andMetaData in interface Message<R>

Specified by:

andMetaData in interface ResultMessage<R>

Specified by:

andMetaData in interface QueryResponseMessage<R>

Parameters:

metaData - The MetaData to merge into the QueryResponseMessage

Returns:

a copy of this message with the given additional MetaData