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Modify MBeanTestUtils to work on JDK 17+

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This commit is contained in:
Sam Brannen
2022-11-30 14:49:48 +01:00
parent 5e55558a93
commit f7f73439ab
2 changed files with 19 additions and 8 deletions
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25
spring-context/src/test/java/org/springframework/util/MBeanTestUtils.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2019 the original author or authors.
* Copyright 2002-2022 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -18,21 +18,26 @@ package org.springframework.util;
import java.lang.management.ManagementFactory;
import java.lang.reflect.Field;
import java.util.EnumSet;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import org.junit.jupiter.api.condition.JRE;
/**
* Utilities for MBean tests.
*
* @author Phillip Webb
* @author Sam Brannen
*/
public class MBeanTestUtils {
/**
* Resets MBeanServerFactory and ManagementFactory to a known consistent state.
* <p>This involves releasing all currently registered MBeanServers and resetting
* the platformMBeanServer to null.
* Resets {@link MBeanServerFactory} to a known consistent state. This involves
* releasing all currently registered MBeanServers.
* <p>On JDK 8 - JDK 16, this method also resets the platformMBeanServer field
* in {@link ManagementFactory} to {@code null}.
*/
public static synchronized void resetMBeanServers() throws Exception {
for (MBeanServer server : MBeanServerFactory.findMBeanServer(null)) {
@@ -46,9 +51,15 @@ public class MBeanTestUtils {
}
}
Field field = ManagementFactory.class.getDeclaredField("platformMBeanServer");
field.setAccessible(true);
field.set(null, null);
if (!isCurrentJreWithinRange(JRE.JAVA_16, JRE.OTHER)) {
Field field = ManagementFactory.class.getDeclaredField("platformMBeanServer");
field.setAccessible(true);
field.set(null, null);
}
}
static boolean isCurrentJreWithinRange(JRE min, JRE max) {
return EnumSet.range(min, max).contains(JRE.currentVersion());
}
}