org.springframework.web.reactive

Class HandlerResult

java.lang.Object

org.springframework.web.reactive.HandlerResult

public class HandlerResult
extends Object

Represent the result of the invocation of a handler or a handler method.

Since:

5.0

Author:

Rossen Stoyanchev

Constructor Summary

Constructors

Constructor and Description
HandlerResult(Object handler, Object returnValue, MethodParameter returnType) Create a new HandlerResult.
HandlerResult(Object handler, Object returnValue, MethodParameter returnType, BindingContext context) Create a new HandlerResult.

Method Summary

Modifier and Type	Method and Description
reactor.core.publisher.Mono<HandlerResult>	applyExceptionHandler(Throwable failure) Apply the exception handler and return the alternative result.
BindingContext	getBindingContext() Return the BindingContext used for request handling.
Object	getHandler() Return the handler that handled the request.
Model	getModel() Return the model used for request handling.
ResolvableType	getReturnType() Return the type of the value returned from the handler -- e.g.
MethodParameter	getReturnTypeSource() Return the MethodParameter from which returnType was created.
Object	getReturnValue() Return the value returned from the handler, if any.
boolean	hasExceptionHandler() Whether there is an exception handler.
HandlerResult	setExceptionHandler(Function<Throwable,reactor.core.publisher.Mono<HandlerResult>> function) Configure an exception handler that may be used to produce an alternative result when result handling fails.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HandlerResult

public HandlerResult(Object handler,
                     @Nullable
                     Object returnValue,
                     MethodParameter returnType)

Create a new HandlerResult.

Parameters:

handler - the handler that handled the request

returnValue - the return value from the handler possibly null

returnType - the return value type

HandlerResult

public HandlerResult(Object handler,
                     @Nullable
                     Object returnValue,
                     MethodParameter returnType,
                     @Nullable
                     BindingContext context)

Create a new HandlerResult.

Parameters:

handler - the handler that handled the request

returnValue - the return value from the handler possibly null

returnType - the return value type

context - the binding context used for request handling

Method Detail

getHandler

public Object getHandler()

Return the handler that handled the request.

getReturnValue

@Nullable
public Object getReturnValue()

Return the value returned from the handler, if any.

getReturnType

public ResolvableType getReturnType()

Return the type of the value returned from the handler -- e.g. the return type declared on a controller method's signature. Also see getReturnTypeSource() to obtain the underlying MethodParameter for the return type.

getReturnTypeSource

public MethodParameter getReturnTypeSource()

Return the MethodParameter from which returnType was created.

getBindingContext

public BindingContext getBindingContext()

Return the BindingContext used for request handling.

getModel

public Model getModel()

Return the model used for request handling. This is a shortcut for getBindingContext().getModel().

setExceptionHandler

public HandlerResult setExceptionHandler(Function<Throwable,reactor.core.publisher.Mono<HandlerResult>> function)

Configure an exception handler that may be used to produce an alternative result when result handling fails. Especially for an async return value errors may occur after the invocation of the handler.

Parameters:

function - the error handler

Returns:

the current instance

hasExceptionHandler

public boolean hasExceptionHandler()

Whether there is an exception handler.

applyExceptionHandler

public reactor.core.publisher.Mono<HandlerResult> applyExceptionHandler(Throwable failure)

Apply the exception handler and return the alternative result.

Parameters:

failure - the exception

Returns:

the new result or the same error if there is no exception handler