WebHttpHandlerBuilder (Spring Framework 5.3.2 API)

java.lang.Object
- org.springframework.web.server.adapter.WebHttpHandlerBuilder

```
public final class WebHttpHandlerBuilder
extends Object
```
This builder has two purposes:
One is to assemble a processing chain that consists of a target WebHandler, then decorated with a set of WebFilters, then further decorated with a set of WebExceptionHandlers.
The second purpose is to adapt the resulting processing chain to an HttpHandler: the lowest-level reactive HTTP handling abstraction which can then be used with any of the supported runtimes. The adaptation is done with the help of HttpWebHandlerAdapter.
The processing chain can be assembled manually via builder methods, or detected from a Spring ApplicationContext via applicationContext, or a mix of both.

Since:

5.0

Author:

Rossen Stoyanchev, Sebastien Deleuze

See Also:

HttpWebHandlerAdapter

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`FORWARDED_HEADER_TRANSFORMER_BEAN_NAME` Well-known name for the ForwardedHeaderTransformer in the bean factory.
`static String`	`LOCALE_CONTEXT_RESOLVER_BEAN_NAME` Well-known name for the LocaleContextResolver in the bean factory.
`static String`	`SERVER_CODEC_CONFIGURER_BEAN_NAME` Well-known name for the ServerCodecConfigurer in the bean factory.
`static String`	`WEB_HANDLER_BEAN_NAME` Well-known name for the target WebHandler in the bean factory.
`static String`	`WEB_SESSION_MANAGER_BEAN_NAME` Well-known name for the WebSessionManager in the bean factory.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`static WebHttpHandlerBuilder`	`applicationContext(ApplicationContext context)` Static factory method to create a new builder instance by detecting beans in an `ApplicationContext`.
`HttpHandler`	`build()` Build the `HttpHandler`.
`WebHttpHandlerBuilder`	`clone()` Clone this `WebHttpHandlerBuilder`.
`WebHttpHandlerBuilder`	`codecConfigurer(ServerCodecConfigurer codecConfigurer)` Configure the `ServerCodecConfigurer` to set on the `WebServerExchange`.
`WebHttpHandlerBuilder`	`exceptionHandler(WebExceptionHandler... handlers)` Add the given exception handler(s).
`WebHttpHandlerBuilder`	`exceptionHandlers(Consumer<List<WebExceptionHandler>> consumer)` Manipulate the "live" list of currently configured exception handlers.
`WebHttpHandlerBuilder`	`filter(WebFilter... filters)` Add the given filter(s).
`WebHttpHandlerBuilder`	`filters(Consumer<List<WebFilter>> consumer)` Manipulate the "live" list of currently configured filters.
`WebHttpHandlerBuilder`	`forwardedHeaderTransformer(ForwardedHeaderTransformer transformer)` Configure the `ForwardedHeaderTransformer` for extracting and/or removing forwarded headers.
`boolean`	`hasCodecConfigurer()` Whether a `ServerCodecConfigurer` is configured or not, either detected from an `ApplicationContext` or explicitly configured via `codecConfigurer`.
`boolean`	`hasForwardedHeaderTransformer()` Whether a `ForwardedHeaderTransformer` is configured or not, either detected from an `ApplicationContext` or explicitly configured via `forwardedHeaderTransformer(ForwardedHeaderTransformer)`.
`boolean`	`hasHttpHandlerDecorator()` Whether a decorator for `HttpHandler` is configured or not via `httpHandlerDecorator(Function)`.
`boolean`	`hasLocaleContextResolver()` Whether a `LocaleContextResolver` is configured or not, either detected from an `ApplicationContext` or explicitly configured via `localeContextResolver`.
`boolean`	`hasSessionManager()` Whether a `WebSessionManager` is configured or not, either detected from an `ApplicationContext` or explicitly configured via `sessionManager`.
`WebHttpHandlerBuilder`	`httpHandlerDecorator(Function<HttpHandler,HttpHandler> handlerDecorator)` Configure a `Function` to decorate the `HttpHandler` returned by this builder which effectively wraps the entire `WebExceptionHandler` - `WebFilter` - `WebHandler` processing chain.
`WebHttpHandlerBuilder`	`localeContextResolver(LocaleContextResolver localeContextResolver)` Configure the `LocaleContextResolver` to set on the `WebServerExchange`.
`WebHttpHandlerBuilder`	`sessionManager(WebSessionManager manager)` Configure the `WebSessionManager` to set on the `WebServerExchange`.
`static WebHttpHandlerBuilder`	`webHandler(WebHandler webHandler)` Static factory method to create a new builder instance.

Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - WEB_HANDLER_BEAN_NAME
```
public static final String WEB_HANDLER_BEAN_NAME
```
    Well-known name for the target WebHandler in the bean factory.
    
    See Also:
    
    Constant Field Values
  - WEB_SESSION_MANAGER_BEAN_NAME
```
public static final String WEB_SESSION_MANAGER_BEAN_NAME
```
    Well-known name for the WebSessionManager in the bean factory.
    
    See Also:
    
    Constant Field Values
  - SERVER_CODEC_CONFIGURER_BEAN_NAME
```
public static final String SERVER_CODEC_CONFIGURER_BEAN_NAME
```
    Well-known name for the ServerCodecConfigurer in the bean factory.
    
    See Also:
    
    Constant Field Values
  - LOCALE_CONTEXT_RESOLVER_BEAN_NAME
```
public static final String LOCALE_CONTEXT_RESOLVER_BEAN_NAME
```
    Well-known name for the LocaleContextResolver in the bean factory.
    
    See Also:
    
    Constant Field Values
  - FORWARDED_HEADER_TRANSFORMER_BEAN_NAME
```
public static final String FORWARDED_HEADER_TRANSFORMER_BEAN_NAME
```
    Well-known name for the ForwardedHeaderTransformer in the bean factory.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - webHandler
```
public static WebHttpHandlerBuilder webHandler(WebHandler webHandler)
```
    Static factory method to create a new builder instance.
    
    Parameters:
    
    webHandler - the target handler for the request
    
    Returns:
    
    the prepared builder
  - applicationContext
```
public static WebHttpHandlerBuilder applicationContext(ApplicationContext context)
```
    Static factory method to create a new builder instance by detecting beans in an ApplicationContext. The following are detected:
    - WebHandler [1] -- looked up by the name WEB_HANDLER_BEAN_NAME.
    - WebFilter [0..N] -- detected by type and ordered, see AnnotationAwareOrderComparator.
    - WebExceptionHandler [0..N] -- detected by type and ordered.
    - WebSessionManager [0..1] -- looked up by the name WEB_SESSION_MANAGER_BEAN_NAME.
    - ServerCodecConfigurer [0..1] -- looked up by the name SERVER_CODEC_CONFIGURER_BEAN_NAME.
    - LocaleContextResolver [0..1] -- looked up by the name LOCALE_CONTEXT_RESOLVER_BEAN_NAME.
    Parameters:
    
    context - the application context to use for the lookup
    
    Returns:
    
    the prepared builder
  - filter
```
public WebHttpHandlerBuilder filter(WebFilter... filters)
```
    Add the given filter(s).
    
    Parameters:
    
    filters - the filter(s) to add that's
  - filters
```
public WebHttpHandlerBuilder filters(Consumer<List<WebFilter>> consumer)
```
    Manipulate the "live" list of currently configured filters.
    
    Parameters:
    
    consumer - the consumer to use
  - exceptionHandler
```
public WebHttpHandlerBuilder exceptionHandler(WebExceptionHandler... handlers)
```
    Add the given exception handler(s).
    
    Parameters:
    
    handlers - the exception handler(s)
  - exceptionHandlers
```
public WebHttpHandlerBuilder exceptionHandlers(Consumer<List<WebExceptionHandler>> consumer)
```
    Manipulate the "live" list of currently configured exception handlers.
    
    Parameters:
    
    consumer - the consumer to use
  - sessionManager
```
public WebHttpHandlerBuilder sessionManager(WebSessionManager manager)
```
    Configure the WebSessionManager to set on the WebServerExchange.
    By default DefaultWebSessionManager is used.
    
    Parameters:
    
    manager - the session manager
    
    See Also:
    
    HttpWebHandlerAdapter.setSessionManager(WebSessionManager)
  - hasSessionManager
```
public boolean hasSessionManager()
```
    Whether a WebSessionManager is configured or not, either detected from an ApplicationContext or explicitly configured via sessionManager.
    
    Since:
    
    5.0.9
  - codecConfigurer
```
public WebHttpHandlerBuilder codecConfigurer(ServerCodecConfigurer codecConfigurer)
```
    Configure the ServerCodecConfigurer to set on the WebServerExchange.
    
    Parameters:
    
    codecConfigurer - the codec configurer
  - hasCodecConfigurer
```
public boolean hasCodecConfigurer()
```
    Whether a ServerCodecConfigurer is configured or not, either detected from an ApplicationContext or explicitly configured via codecConfigurer.
    
    Since:
    
    5.0.9
  - localeContextResolver
```
public WebHttpHandlerBuilder localeContextResolver(LocaleContextResolver localeContextResolver)
```
    Configure the LocaleContextResolver to set on the WebServerExchange.
    
    Parameters:
    
    localeContextResolver - the locale context resolver
  - hasLocaleContextResolver
```
public boolean hasLocaleContextResolver()
```
    Whether a LocaleContextResolver is configured or not, either detected from an ApplicationContext or explicitly configured via localeContextResolver.
    
    Since:
    
    5.0.9
  - forwardedHeaderTransformer
```
public WebHttpHandlerBuilder forwardedHeaderTransformer(ForwardedHeaderTransformer transformer)
```
    Configure the ForwardedHeaderTransformer for extracting and/or removing forwarded headers.
    
    Parameters:
    
    transformer - the transformer
    
    Since:
    
    5.1
  - hasForwardedHeaderTransformer
```
public boolean hasForwardedHeaderTransformer()
```
    Whether a ForwardedHeaderTransformer is configured or not, either detected from an ApplicationContext or explicitly configured via forwardedHeaderTransformer(ForwardedHeaderTransformer).
    
    Since:
    
    5.1
  - httpHandlerDecorator
```
public WebHttpHandlerBuilder httpHandlerDecorator(Function<HttpHandler,HttpHandler> handlerDecorator)
```
    Configure a Function to decorate the HttpHandler returned by this builder which effectively wraps the entire WebExceptionHandler - WebFilter - WebHandler processing chain. This provides access to the request and response before the entire chain and likewise the ability to observe the result of the entire chain.
    
    Parameters:
    
    handlerDecorator - the decorator to apply
    
    Since:
    
    5.3
  - hasHttpHandlerDecorator
```
public boolean hasHttpHandlerDecorator()
```
    Whether a decorator for HttpHandler is configured or not via httpHandlerDecorator(Function).
    
    Since:
    
    5.3
  - build
```
public HttpHandler build()
```
    Build the HttpHandler.
  - clone
```
public WebHttpHandlerBuilder clone()
```
    Clone this WebHttpHandlerBuilder.
    
    Overrides:
    
    clone in class Object
    
    Returns:
    
    the cloned builder instance

Class WebHttpHandlerBuilder

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

WEB_HANDLER_BEAN_NAME

WEB_SESSION_MANAGER_BEAN_NAME

SERVER_CODEC_CONFIGURER_BEAN_NAME

LOCALE_CONTEXT_RESOLVER_BEAN_NAME

FORWARDED_HEADER_TRANSFORMER_BEAN_NAME

Method Detail

webHandler

applicationContext

filter

filters

exceptionHandler

exceptionHandlers

sessionManager

hasSessionManager

codecConfigurer

hasCodecConfigurer

localeContextResolver

hasLocaleContextResolver

forwardedHeaderTransformer

hasForwardedHeaderTransformer

httpHandlerDecorator

hasHttpHandlerDecorator

build

clone