holgerfriedrich opened a new pull request, #2214:
URL: https://github.com/apache/karaf/pull/2214
This is a first step to prepare the 4.5 branch for running with Java 25.
Starting Karaf in Java 25 does not yet work, as a few functions related to
the SecurityManager have been deprecated long time ago and cannot be activated
any longer via command line switches.
As a new API has been added in Java 18, I for new lift the minimum required
version to Java 21 (LTS).
Maybe this is not the way to go - as there has been some discussions if we
could introduce an abstraction layer to allow Java 17 as well.
* Lift minimum JDK version to 21
* Remove occurrences of SecurityManager, as getSecurityManager returns
null since JDK 18
* Disable JavaSecurityTest, #2082
* Enable verbose deprecation warnings
* Replace getSubject and doAs calls
** getSubject can no longer be activated via JRE command line as
SecurityManager has been removed in JDK 25.
A replacement is available since Java 21.
** doAs was deprecated and is replaced by callAll.
For Java 25, another set of modifications is still needed and will be
submitted as another PR.
Locally, I got Karaf compiling and starting with Java 25. 🥳
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