This is a follow-up change related to gh-31104.
This change reverts the changes previously made in
`ExceptionHandlerExceptionResolver` and instead attempts to reset the
response directly in `DispatcherServlet` in order to cover all types or
exception handling.
Unlike the previous change, we decided to continue even if the response
was already committed: exception handlers will have a chance to be
called, even if it means they'll have to operate on a garbled response.
This change will cause less disruption, in case existing exception
handlers were relying on this behavior.
See gh-31104
Prior to this commit, the `ExceptionHandlerExceptionResolver` would
resolve exceptions and handle them by writing to the HTTP response body,
even if the request was already partially handled and content was
written to the response body.
This could result in HTTP responses with some content for the intended
application response, then other content for the handled exception.
This would happen especially when the error would be raised while
writing to the response (for example when serializing content).
This commit attempts to reset the HTTP response before handling the
exception. This effectively resets the response buffer for the body as
well as response headers. If the response is already committed, the
Servlet container raises an exception and the exception handling is
skipped altogether in order to avoid garbled responses.
Closes gh-31104
This commit changes the `synchronized` usage into a `ReentrantLock`, in
order to guard write operations with a construct that does not pin
virtual threads to the current platform thread on JDK21.
Closes gh-30996
Prior to this commit, the `SseEventBuilder` would be used to create SSE
events and write them to the connection using the `ResponseBodyEmitter`.
This would send each data item one by one, effectively writing and
flushing to the network for each. Since multiple data lines are prepared
by the `SseEventBuilder`, a typical write of an SSE event performs
multiple flushes operations.
This commit adds a method on `ResponseBodyEmitter` to perform batch
writes (given a `Set<DataWithMediaType>`) and only flush once all
elements of the set have been written.
This also applies in case of early writes, where now all buffered
elements are written then flushed altogether.
Fixes gh-30912
Prior to this commit, MappedInterceptor had a getPathPatterns() method
that returned the include patterns.
This commit introduces getIncludePathPatterns() (which effectively
replaces getPathPatterns()) and getExcludePathPatterns(). In addition,
this commit deprecates getPathPatterns().
Closes gh-30971
This commit ensures that ServerResponse.HeadersBuilder::build can throw
an exception, by introducing a separate functional interface that does
allow for exceptions to be thrown.
Closes gh-30818
rstoyanchev
Arjen Poutsma
Brian Clozel
lihan
Stephane Nicoll
70825
Sam Brannen
Olga MaciaszekSharma
Juergen Hoeller
graceyu
Johnny Lim
Patrick Strawderman