JIRA: https://jira.spring.io/browse/INT-4433
The current `MessagePublishingInterceptor` behavior is to parse expressions
on each method invocation what is not so efficient at runtime
* Introduce `default` `Expression`-based method to the `PublisherMetadataSource`
contract and call existing String-based methods for backward compatibility.
* Deprecate String-based `PublisherMetadataSource` methods in favor of newly
introduced `Expression`-based
* Implement new `getExpressionForPayload()` and `getExpressionsForHeaders()`
in all the `PublisherMetadataSource` implementations
* Cache parsed `Expression` s during initialization in the `PublisherMetadataSource`
implementations or do that on demand in the `MethodAnnotationPublisherMetadataSource`
by provided method basis
* Introduce `MethodAnnotationPublisherMetadataSource#metadataCacheLimit` and populate
its value from the `@EnablePublisher` or `<int:annotation-configuration>`
* Implement `entrySet()` and `values()` in the `ExpressionEvalMap`
**Cherry-pick to 5.0.x**
* Add `@SuppressWarnings("varargs")` to avoid compilation warning
* Remove LRU cache logic - it's fine to cache all the info about methods
in the classpath
b1a3ca764c