ServerWebExchangeContextFilter (Spring Framework 5.2.12.RELEASE API)

java.lang.Object
- org.springframework.web.filter.reactive.ServerWebExchangeContextFilter

All Implemented Interfaces:
WebFilter
```
public class ServerWebExchangeContextFilter
extends Object
implements WebFilter
```
Inserts an attribute in the Reactor Context that makes the current ServerWebExchange available under the attribute name EXCHANGE_CONTEXT_ATTRIBUTE. This is useful for access to the exchange without explicitly passing it to components that participate in request processing.
The convenience method get(Context) looks up the exchange.
Since:
5.2
Author:
Rossen Stoyanchev

Field Summary
Fields
Modifier and Type Field Description
static String EXCHANGE_CONTEXT_ATTRIBUTE
Attribute name under which the exchange is saved in the context.

Constructor Summary
Constructors
Constructor Description
ServerWebExchangeContextFilter()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`reactor.core.publisher.Mono<Void>`	`filter(ServerWebExchange exchange, WebFilterChain chain)`	Process the Web request and (optionally) delegate to the next `WebFilter` through the given `WebFilterChain`.
`static Optional<ServerWebExchange>`	`get(reactor.util.context.Context context)`	Access the `ServerWebExchange` from the Reactor Context, if available, which is if `ServerWebExchangeContextFilter` is configured for use and the give context was obtained from a request processing chain.

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

- Field Detail
  - EXCHANGE_CONTEXT_ATTRIBUTE
```
public static final String EXCHANGE_CONTEXT_ATTRIBUTE
```
    Attribute name under which the exchange is saved in the context.
- Constructor Detail
  - ServerWebExchangeContextFilter
```
public ServerWebExchangeContextFilter()
```
- Method Detail
  - filter
```
public reactor.core.publisher.Mono<Void> filter(ServerWebExchange exchange,
                                                WebFilterChain chain)
```
    Description copied from interface: WebFilter
    Process the Web request and (optionally) delegate to the next WebFilter through the given WebFilterChain.
    Specified by:
    filter in interface WebFilter
    Parameters:
    exchange - the current server exchange
    chain - provides a way to delegate to the next filter
    Returns:
    Mono<Void> to indicate when request processing is complete
  - get
```
public static Optional<ServerWebExchange> get(reactor.util.context.Context context)
```
    Access the ServerWebExchange from the Reactor Context, if available, which is if ServerWebExchangeContextFilter is configured for use and the give context was obtained from a request processing chain.
    Parameters:
    context - the context in which to access the exchange
    Returns:
    the exchange