SocketUtils was introduced in Spring Framework 4.0, primarily to assist
in writing integration tests which start an external server on an
available random port. However, these utilities make no guarantee about
the subsequent availability of a given port and are therefore
unreliable. Instead of using SocketUtils to find an available local
port for a server, it is recommended that users rely on a server's
ability to start on a random port that it selects or is assigned by the
operating system. To interact with that server, the user should query
the server for the port it is currently using.
SocketUtils is now deprecated in 5.3.16 and will be removed in 6.0.
Closes gh-28052
Prior to this commit, if AOP proxy generation was configured with
proxyTargetClass=true (which is the default behavior in recent versions
of Spring Boot), beans implemented as lambda expressions or method
references could not be proxied with CGLIB on Java 16 or higher without
specifying `--add-opens java.base/java.lang=ALL-UNNAMED`.
This commit addresses this shortcoming by ensuring that beans
implemented as lambda expressions or method references are always
proxied using a JDK dynamic proxy even if proxyTargetClass=true.
Closes gh-27971
Prior to this commit, the QuartzCronField::weekdayNearestTo would elapse
until the next month before checking if the current day matched.
After this commit, the current day is checked before we elapse until
the next month.
Closes gh-27966
This commit switches from CGLIB-based proxies to JDK dynamic proxies
for AOP and scoped-bean tests, in order to be able to run tests in the
Eclipse IDE without special Run Configuration setup for the Java module
system.
This commit also simplifies the loading of beans defined with the Groovy
DSL.
See gh-27945
Prior to this commit, GroovyDynamicElementReader was implemented in
Groovy, which required that developers have Groovy language support
installed and configured in their IDEs.
This commit ports GroovyDynamicElementReader from Groovy to Java,
making the compilation much simpler and allowing developers to open the
project in Eclipse or VSCode (or other IDEs without Groovy support)
without compiler errors.
This commit also converts related tests from Groovy to Java.
Closes gh-27945
Prior to this commit, if a PropertySourcesPlaceholderConfigurer bean
was configured with its ignoreUnresolvablePlaceholders flag set to
true, unresolvable placeholders in an @Value annotation were not
ignored, resulting in a BeanCreationException for the bean using @Value.
For example, given a property declared as `my.app.var = ${var}` without
a corresponding `var` property declared, an attempt to resolve
`@Value("${my.app.var}")` resulted in the following exception.
java.lang.IllegalArgumentException: Could not resolve placeholder 'var' in value "${var}"
This commit fixes this by modifying
PropertySourcesPlaceholderConfigurer's postProcessBeanFactory(...)
method so that a local PropertyResolver is created if the
ignoreUnresolvablePlaceholders flag is set to true. The local
PropertyResolver then enforces that flag, since the Environment in the
ApplicationContext is most likely not configured with
ignoreUnresolvablePlaceholders set to true.
Closes gh-27947
This commit adds default methods to CachingConfigurer and
JCacheConfigurer and removes the reference to their respective support
classes as they are now irrelevant.
Closes gh-27811
Guirong Hu