Prior to the introduction of the MergedAnnotation API in Spring Framework
5.2, our SynthesizedAnnotationInvocationHandler utilized a cache for
annotation attribute values; whereas, the new
SynthesizedMergedAnnotationInvocationHandler has no such caching in
place.
Issues such as gh-24961 indicate a regression in performance caused by
the lack of such an attribute value cache. For example, the required
attribute in @RequestParam is looked up using the internal meta-model
in the MergedAnnotation API twice per request for each @RequestParam in
a given controller handler method.
This commit reintroduces the attribute value cache to avoid the
unnecessary performance overhead associated with multiple lookups of
the same attribute in a synthesized annotation. This applies not only
to direct attribute method invocations but also to invocations of
equals() and hashCode() on a synthesized annotation.
Note, however, that this commit does NOT address multiple lookups of
annotation attribute values for invocations of toString(). That behavior
currently remains unchanged in the implementation of
org.springframework.core.annotation.TypeMappedAnnotation.toString().
Closes gh-24970
Commit 31fa1569c5 introduced initial support for avoiding unnecessary
annotation synthesis in the MergedAnnotation API; however, it only
avoided synthesis for annotations that do not declare any attributes.
This commit reworks this support to avoid unnecessary annotation
synthesis for annotations that declare attributes.
Specifically, this commit introduces a new `isSynthesizable()` method
in AnnotationTypeMapping that allows the "synthesizable" flag to be
computed once and cached along with the other metadata already cached
in AnnotationTypeMapping instances. TypeMappedAnnotation now delegates
to this new method when determining whether it should synthesize an
annotation.
Closes gh-24861
Prior to Spring Framework 5.2, some of our annotation utilities would
not synthesize an annotation if it was already synthesized or not
synthesizable (i.e., did not declare local aliases via @AliasFor and
did not declare attributes that could override attributes in the
meta-annotation hierarchy above the given annotation); however, we lost
most of this functionality with the introduction of the new
MergedAnnotations API.
This commit revises the implementation of createSynthesized() in
TypeMappedAnnotation so that, for invocations of
MergedAnnotation.synthesize() and indirectly for invocations of
AnnotatedElementUtils.findMergedAnnotation(), etc.:
1. An annotation that was previously synthesized will not be
synthesized again.
2. An annotation that is not "synthesizable" will not be synthesized.
For both of the above use cases, the original annotation is now
returned from createSynthesized().
Closes gh-24861
Prior to this commit, the `MimeTypeUtils` LRUCache would maintain a
queue to track least recently used cached values. In some cases,
concurrent access could create more entries in that unbounded queue than
expected and spend a significant amount of time removing entries in that
queue (i.e. iterating over a long list of elements).
This commit ensures that recently used entries are only added to the
queue if they've been removed by the current thread, in case of
concurrent access.
Fixes gh-24886
The following modification will also recursively traverse the directory that the symbolic link points to.
This modification is not proposed for deleteRecursively, since it can be harmful if not intended.
This modification relates to the following commit:
Consistent use of NIO.2 for file read/write interactions
Issue: SPR-15748
12114a9
Prior to this commmit, "mutipart/*" MIME types would be cached by the
`MimeTypeUtils` LRU cache. Since those MIME types are likely to have
random boundaries in them, they can waste space in the LRU cache.
This is not improving things since we're parsing them anyway.
This commit skips the caching step for all "multipart" MIME types.
Fixes gh-24767
This commit improves the performance of the `ConcurrentLruCache` and
applies a consistent style to the code:
* separating read/write locks into different variables does not help
performance, so this change is reverted
* apply a consistent style for read/write locks and try/cactch calls
* the reordering of recently used keys is only done when the cache is
full
Fixes gh-24671
- manage collection size manually
- check cache hit first before size check
- reduce read-lock scope
- use `map.get` to test cache instead of `queue.remove`
Closes gh-24469
See gh-24671
Prior to this commit, DefaultParameterNameDiscoverer did not register
any discovers when compiling or running as a GraalVM native image.
This commit relaxes the GraalVM check so that it is only applied to the
registration of KotlinReflectionParameterNameDiscoverer.
Consequently, StandardReflectionParameterNameDiscoverer and
LocalVariableTableParameterNameDiscoverer are once again always
registered by DefaultParameterNameDiscoverer.
Closes gh-24600
Spring Framework 5.0 introduced a regression in ASM-based annotation
processing. Specifically, nested annotations were no longer supported,
and component scanning resulted in an exception if a candidate
component was annotated with an annotation that contained nested
annotations.
This commit fixes this regression by introducing special handling in
AnnotationTypeMapping that supports extracting values from objects of
type TypeMappedAnnotation when necessary.
Closes gh-24375
This is a follow-up on the earlier commit
28a95e89f3 eliminating windowUntil
entirely which generates a BubblingException wrapper. This also keeps
the chain a little simpler.
See gh-24355
Spring Framework provides two implementations of the
CommandLinePropertySource API: SimpleCommandLinePropertySource and
JOptCommandLinePropertySource.
Prior to this commit, JOptCommandLinePropertySource supported empty
values for optional arguments; whereas, SimpleCommandLinePropertySource
did not.
This commit modifies the implementation of SimpleCommandLinePropertySource
to allow empty values for optional arguments.
Closes gh-24464
The case of one data buffer containing multiple lines can could cause
a buffer leak due to a suspected issue in concatMapIterable. This
commit adds workarounds for that until the underlying issue is
addressed.
Closes gh-24339
The converter now tries to keep reading from the same InputStream which
should be possible with ordered and non-overlapping regions. When
necessary the InputStream is re-opened.
Closes gh-24214
Juergen Hoeller
Сергей Цыпанов
Sam Brannen
Rossen Stoyanchev
Sébastien Deleuze
Mikael
Johnny Lim
Brian Clozel
Moran Avigdor
Qimiao Chen
Christoph Dreis
Kwangyong Kim
Hyunjin Choi
Kalmesh Sambrani
hyeonisism
Oleh Faizulin