This commit introduces a new, functional web programming model in the
org.springframework.web.reactive.function package. The key types
are:
- Request and Response are new Java 8-DSLs for access to the HTTP
request and response
- HandlerFunction represents a function to handle a request to a
response
- RoutingFunction maps a request to a HandlerFunction
- FilterFunction filters a routing as defined by a RoutingFunction
- RequestPredicate is used by Router to create RoutingFunctions
- RequestPredicates offers common RequestPredicate instances
- Renamed SseEvent to ServerSentEvent to make the name less redundant.
- ServerSentEvent is now immutable, having a builder to create new instances.
- Realigned the class properties to more closely match the events
described in the spec, so that `reconnectTime` becomes `retry`, and
`name` becomes `event`.
This commit updates the instructions on getting started with
Spring Web Reactive and also updates constructors and setters to
streamline the getting started procedure.
Issue: SPR-14640
Prior to this commit, exceptions thrown by the
`HandlerMethodArgumentResolver` would be wrapped into
`IllegalStateException`s.
This commit makes sure that a DEBUG log is written with the relevant
information and that the root cause is not wrapped into another
exception, so that the appropriate `ExceptionHandler` can be used to
deal with this error.
Issue: SPR-14618
reactor.test.TestSubscriber will not be part of Reactor Core
3.0.0 since it needs to be refactored to fit all the needs
expressed by the users. It is likely to be back later in one
of the Reactor Core 3.0.x releases.
This commit anticipate this removal by temporarily copying
TestSubscriber in spring-core test classes. As soon as
the new TestSubscriber will be available in Reactor Core,
Spring Framework reactive tests will use it again.
There is really no need for a result handler dedicated to a void
return value and it's actually problematic to have it.
Each result handler treats void as necessary. For an @ResponseBody
method it means an empty body. For view resolution it means no specific
value was returned and we should procede with selecting a default view
name. Having a dedicated void result handler can interfere with this
especially since view resolution needs to be last in order.
At the same time there are cases when no result handling is needed
and the response is fully handled within the HandlerAdapter. This is
the case with WebHandler and the SimpleHandlerAdapter. For that case
we simply return mono.then(aVoid -> Mono.empty()) which effectively
returns an empty Mono and no result handling follows. The
HandlerAdapter already says you can return no values at all if the
response is fully handled.
DataSourceUtils moved to main core.io.buffer package.
Consistently named Jackson2JsonDecoder/Encoder and Jaxb2XmlDecoder/Encoder.
Plenty of related polishing.
This commit changes the reactive flushing mechanism to use a newly
introduced writeAndFlushWith(Publisher<Publisher<DataBuffer>>) on
ReactiveHttpOutputMessage instead of using the FlushingDataBuffer.
Issue: https://github.com/spring-projects/spring-reactive/issues/125
Moved ResponseBodyProcessor creation from constructor to
writeWithInternal(), in preparation of supporting both
Publisher<DataBuffer> as well as Publisher<Publisher<DataBuffer>>.
In preparation of supporting both Publisher<DataBuffer> and
Publisher<Publisher<DataBuffer>> as response body, moved
RequestBodyPublisher and ResponseBodyProcessor into
ServletServerHttpRequest and ServletServerHttpResponse respectively.
