Package org.springframework.messaging.handler.invocation.reactive

Interface HandlerMethodReturnValueHandler

All Known Implementing Classes:

AbstractEncoderMethodReturnValueHandler, HandlerMethodReturnValueHandlerComposite, RSocketPayloadReturnValueHandler

public interface HandlerMethodReturnValueHandler

Handle the return value from the invocation of an annotated Message handling method.

Since:

5.2

Author:

Rossen Stoyanchev

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DATA_BUFFER_FACTORY_HEADER	Header containing a DataBufferFactory for use in return value handling.

Method Summary

Modifier and Type	Method	Description
reactor.core.publisher.Mono<Void>	handleReturnValue(Object returnValue, MethodParameter returnType, Message<?> message)	Handle the given return value.
boolean	supportsReturnType(MethodParameter returnType)	Whether the given method return type is supported by this handler.

Field Details

DATA_BUFFER_FACTORY_HEADER

static final String DATA_BUFFER_FACTORY_HEADER

Header containing a DataBufferFactory for use in return value handling.

See Also:

• Constant Field Values

Method Details

supportsReturnType

boolean supportsReturnType(MethodParameter returnType)

Whether the given method return type is supported by this handler.

Parameters:

returnType - the method return type to check

Returns:

true if this handler supports the supplied return type; false otherwise

handleReturnValue

reactor.core.publisher.Mono<Void> handleReturnValue(@Nullable
 Object returnValue,
 MethodParameter returnType,
 Message<?> message)

Handle the given return value.

Parameters:

returnValue - the value returned from the handler method

returnType - the type of the return value. This type must have previously been passed to supportsReturnType(MethodParameter) and it must have returned true.

Returns:

Mono<Void> to indicate when handling is complete.