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8044122: MBean access to the PID

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Added new API getPid for getting process ID

Reviewed-by: mchung, rriggs
This commit is contained in:
Ujwal Vangapally 2017-11-07 22:05:44 -08:00 • committed by Ujwal Vangapally
parent 72a1ec38f3
commit 6eeb777697
2 changed files with 68 additions and 0 deletions
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19
src/java.management/share/classes/java/lang/management/RuntimeMXBean.java
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@ -25,6 +25,9 @@
package java.lang.management; package java.lang.management;
import java.security.AccessController;
import java.security.PrivilegedAction;
/** /**
* The management interface for the runtime system of * The management interface for the runtime system of
* the Java virtual machine. * the Java virtual machine.
@ -60,6 +63,22 @@ package java.lang.management;
* @since 1.5 * @since 1.5
*/ */
public interface RuntimeMXBean extends PlatformManagedObject { public interface RuntimeMXBean extends PlatformManagedObject {
/**
* Returns the {@linkplain ProcessHandle#pid process ID} representing
* the running Java virtual machine.
*
* @implSpec The default implementation returns {@link ProcessHandle#pid process ID}
* of the {@linkplain ProcessHandle#current current process}.
*
* @return the process ID representing the running Java virtual machine.
*
* @since 10
*/
public default long getPid() {
return AccessController.doPrivileged((PrivilegedAction<Long>)
() -> ProcessHandle.current().pid());
}
/** /**
* Returns the name representing the running Java virtual machine. * Returns the name representing the running Java virtual machine.
* The returned name string can be any arbitrary string and * The returned name string can be any arbitrary string and

49
test/jdk/java/lang/management/RuntimeMXBean/ProcessIdTest.java Normal file
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@ -0,0 +1,49 @@
/*
* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8044122
* @summary check the correctness of process ID returned by RuntimeMXBean.getPid()
* @run main ProcessIdTest
*/
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
import java.lang.ProcessHandle;
public class ProcessIdTest {
public static void main(String args[]) {
RuntimeMXBean mbean = ManagementFactory.getRuntimeMXBean();
long mbeanPid = mbean.getPid();
long pid = ProcessHandle.current().pid();
long pid1 = Long.parseLong(mbean.getName().split("@")[0]);
if(mbeanPid != pid || mbeanPid != pid1) {
throw new RuntimeException("Incorrect process ID returned");
}
System.out.println("Test Passed");
}
}