gemmellr commented on code in PR #5976:
URL: https://github.com/apache/activemq-artemis/pull/5976#discussion_r2440740478


##########
artemis-commons/src/main/java25/org/apache/activemq/artemis/utils/sm/SecurityManagerShim.java:
##########
@@ -0,0 +1,75 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.activemq.artemis.utils.sm;
+
+import java.security.PrivilegedAction;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.util.Objects;
+import java.util.concurrent.Callable;
+import java.util.concurrent.CompletionException;
+
+import javax.security.auth.Subject;
+
+public class SecurityManagerShim {
+
+   // TODO: Move to Subject specific class?
+   public static Subject currentSubject() {
+      return Subject.current();
+   }
+
+   // TODO: Move to Subject specific class?
+   public static <T> T callAs(final Subject subject, final Callable<T> 
callable) throws CompletionException {
+      Objects.requireNonNull(callable);
+
+      return Subject.callAs(subject, callable);
+   }
+
+   public static boolean isSecurityManagerEnabled() {
+      return false; // It was removed in Java 24+
+   }
+
+   public static Object getAccessControlContext() {
+      // AccessControlContext is now only useful with a SecurityManager,
+      // which can never be used in Java 24+. Return null so calling
+      // code can determine there is nothing to be do re: SecurityManager.
+      return null;
+   }
+
+   public static<T> T doPrivileged(PrivilegedAction<T> action) {
+      Objects.requireNonNull(action);
+
+      return action.run();
+   }
+
+   public static<T> T doPrivileged(final PrivilegedAction<T> action, final 
Object context) {
+      Objects.requireNonNull(action);
+
+      return action.run();
+   }
+
+   public static <T> T doPrivileged(final PrivilegedExceptionAction<T> 
exceptionAction) throws PrivilegedActionException {
+      Objects.requireNonNull(exceptionAction);
+
+      try {
+         return exceptionAction.run();
+      } catch (Exception e) {

Review Comment:
   Yep. Per the 'work in progress, only for reference in discussion' 
commentary, the shim isnt actually complete (most of the work so far was around 
the tests and class handling etc), hence no API doc yet and various TODOs 
(admittedly I didn't put one here specifically though). That was simply the 
minimum initial implementation to make this method compile since PEA declares 
it throws Exception. Good catch though :)



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