org.axonframework.axonserver.connector.query

Class GrpcBackedQueryMessage<Q,R>

java.lang.Object

org.axonframework.axonserver.connector.query.GrpcBackedQueryMessage<Q,R>

Type Parameters:

Q - a generic specifying the type of the QueryMessage's payload

R - a generic specifying the expected response type of the QueryMessage

All Implemented Interfaces:

Serializable, Message<Q>, QueryMessage<Q,R>

public class GrpcBackedQueryMessage<Q,R>
extends Object
implements QueryMessage<Q,R>

Wrapper that allows clients to access a gRPC QueryRequest as a QueryMessage.

Since:

4.0

Author:

Marc Gathier

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
GrpcBackedQueryMessage(io.axoniq.axonserver.grpc.query.QueryRequest queryRequest, Serializer messageSerializer, Serializer serializer) Instantiate a GrpcBackedResponseMessage with the given queryRequest, using the provided messageSerializer to be able to retrieve the payload and MetaData from it.

Method Summary

Modifier and Type	Method and Description
GrpcBackedQueryMessage<Q,R>	andMetaData(Map<String,?> metaData) Returns a copy of this QueryMessage with its MetaData merged with given metaData.
String	getIdentifier() Returns the identifier of this message.
MetaData	getMetaData() Returns the meta data for this event.
Q	getPayload() Returns the payload of this Event.
Class<Q>	getPayloadType() Returns the type of the payload.
String	getQueryName() Returns the name identifying the query to be executed.
ResponseType<R>	getResponseType() The type of response expected by the sender of the query
GrpcBackedQueryMessage<Q,R>	withMetaData(Map<String,?> metaData) Returns a copy of this QueryMessage 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.queryhandling.QueryMessage

queryName

Methods inherited from interface org.axonframework.messaging.Message

serializeMetaData, serializePayload

Constructor Detail

GrpcBackedQueryMessage

public GrpcBackedQueryMessage(io.axoniq.axonserver.grpc.query.QueryRequest queryRequest,
                              Serializer messageSerializer,
                              Serializer serializer)

Instantiate a GrpcBackedResponseMessage with the given queryRequest, using the provided messageSerializer to be able to retrieve the payload and MetaData from it. The serializer is solely used to deserialize the response type.

Parameters:

queryRequest - the QueryRequest which is being wrapped as a QueryMessage

messageSerializer - the Serializer used to deserialize the payload and MetaData from the given queryRequest

serializer - the Serializer used to deserialize the 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<Q,R>

Returns:

the name identifying the query to be executed.

getResponseType

public ResponseType<R> getResponseType()

Description copied from interface: QueryMessage

The type of response expected by the sender of the query

Specified by:

getResponseType in interface QueryMessage<Q,R>

Returns:

the type of response expected by the sender of the query

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<Q>

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<Q>

Returns:

the meta data for this event

getPayload

public Q 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<Q>

Returns:

the payload of this Event

getPayloadType

public Class<Q> 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<Q>

Returns:

the type of payload.

withMetaData

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

Description copied from interface: QueryMessage

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

Specified by:

withMetaData in interface Message<Q>

Specified by:

withMetaData in interface QueryMessage<Q,R>

Parameters:

metaData - The new MetaData for the QueryMessage

Returns:

a copy of this message with the given MetaData

andMetaData

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

Description copied from interface: QueryMessage

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

Specified by:

andMetaData in interface Message<Q>

Specified by:

andMetaData in interface QueryMessage<Q,R>

Parameters:

metaData - The MetaData to merge into the QueryMessage

Returns:

a copy of this message with the given additional MetaData