org.springframework.boot.autoconfigure.web.reactive.error

Class AbstractErrorWebExceptionHandler

java.lang.Object

org.springframework.boot.autoconfigure.web.reactive.error.AbstractErrorWebExceptionHandler

All Implemented Interfaces:

InitializingBean, ErrorWebExceptionHandler, WebExceptionHandler

Direct Known Subclasses:

DefaultErrorWebExceptionHandler

public abstract class AbstractErrorWebExceptionHandler
extends Object
implements ErrorWebExceptionHandler, InitializingBean

Abstract base class for ErrorWebExceptionHandler implementations.

Since:

2.0.0

Author:

Brian Clozel

See Also:

ErrorAttributes

Constructor Summary

Constructors

Constructor and Description
AbstractErrorWebExceptionHandler(ErrorAttributes errorAttributes, ResourceProperties resourceProperties, ApplicationContext applicationContext)

Method Summary

Modifier and Type	Method and Description
void	afterPropertiesSet()
protected Throwable	getError(ServerRequest request) Extract the original error from the current request.
protected Map<String,Object>	getErrorAttributes(ServerRequest request, boolean includeStackTrace) Extract the error attributes from the current request, to be used to populate error views or JSON payloads.
protected abstract RouterFunction<ServerResponse>	getRoutingFunction(ErrorAttributes errorAttributes) Create a RouterFunction that can route and handle errors as JSON responses or HTML views.
reactor.core.publisher.Mono<Void>	handle(ServerWebExchange exchange, Throwable throwable)
protected boolean	isTraceEnabled(ServerRequest request) Check whether the trace attribute has been set on the given request.
protected reactor.core.publisher.Mono<ServerResponse>	renderDefaultErrorView(ServerResponse.BodyBuilder responseBody, Map<String,Object> error) Render a default HTML "Whitelabel Error Page".
protected reactor.core.publisher.Mono<ServerResponse>	renderErrorView(String viewName, ServerResponse.BodyBuilder responseBody, Map<String,Object> error) Render the given error data as a view, using a template view if available or a static HTML file if available otherwise.
void	setMessageReaders(List<HttpMessageReader<?>> messageReaders) Configure HTTP message readers to deserialize the request body with.
void	setMessageWriters(List<HttpMessageWriter<?>> messageWriters) Configure HTTP message writers to serialize the response body with.
void	setViewResolvers(List<ViewResolver> viewResolvers) Configure the ViewResolver to use for rendering views.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractErrorWebExceptionHandler

public AbstractErrorWebExceptionHandler(ErrorAttributes errorAttributes,
                                        ResourceProperties resourceProperties,
                                        ApplicationContext applicationContext)

Method Detail

setMessageWriters

public void setMessageWriters(List<HttpMessageWriter<?>> messageWriters)

Configure HTTP message writers to serialize the response body with.

Parameters:

messageWriters - the HttpMessageWriters to use

setMessageReaders

public void setMessageReaders(List<HttpMessageReader<?>> messageReaders)

Configure HTTP message readers to deserialize the request body with.

Parameters:

messageReaders - the HttpMessageReaders to use

setViewResolvers

public void setViewResolvers(List<ViewResolver> viewResolvers)

Configure the ViewResolver to use for rendering views.

Parameters:

viewResolvers - the list of ViewResolvers to use

getErrorAttributes

protected Map<String,Object> getErrorAttributes(ServerRequest request,
                                                boolean includeStackTrace)

Extract the error attributes from the current request, to be used to populate error views or JSON payloads.

Parameters:

request - the source request

includeStackTrace - whether to include the error stacktrace information

Returns:

the error attributes as a Map.

getError

protected Throwable getError(ServerRequest request)

Extract the original error from the current request.

Parameters:

request - the source request

Returns:

the error

isTraceEnabled

protected boolean isTraceEnabled(ServerRequest request)

Check whether the trace attribute has been set on the given request.

Parameters:

request - the source request

Returns:

true if the error trace has been requested, false otherwise

renderErrorView

protected reactor.core.publisher.Mono<ServerResponse> renderErrorView(String viewName,
                                                                      ServerResponse.BodyBuilder responseBody,
                                                                      Map<String,Object> error)

Render the given error data as a view, using a template view if available or a static HTML file if available otherwise. This will return an empty Publisher if none of the above are available.

Parameters:

viewName - the view name

responseBody - the error response being built

error - the error data as a map

Returns:

a Publisher of the ServerResponse

renderDefaultErrorView

protected reactor.core.publisher.Mono<ServerResponse> renderDefaultErrorView(ServerResponse.BodyBuilder responseBody,
                                                                             Map<String,Object> error)

Render a default HTML "Whitelabel Error Page".

Useful when no other error view is available in the application.

Parameters:

responseBody - the error response being built

error - the error data as a map

Returns:

a Publisher of the ServerResponse

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

Exception

getRoutingFunction

protected abstract RouterFunction<ServerResponse> getRoutingFunction(ErrorAttributes errorAttributes)

Create a RouterFunction that can route and handle errors as JSON responses or HTML views.

If the returned RouterFunction doesn't route to a HandlerFunction, the original exception is propagated in the pipeline and can be processed by other WebExceptionHandlers.

Parameters:

errorAttributes - the ErrorAttributes instance to use to extract error information

Returns:

a RouterFunction that routes and handles errors

handle

public reactor.core.publisher.Mono<Void> handle(ServerWebExchange exchange,
                                                Throwable throwable)

Specified by:

handle in interface WebExceptionHandler