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/*
* Copyright (c) 2004, 2015, 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 5011189 8004928
* @summary Unit test for java.lang.management.CompilationMXBean
*
* @run main/othervm -Xcomp -Xbatch Basic
*/
import java.lang.management.*;
public class Basic {
public static void main(String args[]) {
CompilationMXBean mb = ManagementFactory.getCompilationMXBean();
if (mb == null) {
System.out.println("The virtual machine doesn't have a compilation system");
return;
}
// Exercise getName() method
System.out.println(mb.getName());
// If compilation time monitoring isn't supported then we are done
if (!mb.isCompilationTimeMonitoringSupported()) {
System.out.println("Compilation time monitoring not supported.");
return;
}
// Exercise getTotalCompilationTime();
long time;
// If the compiler has already done some work then we are done
time = mb.getTotalCompilationTime();
if (time > 0) {
printCompilationTime(time);
return;
}
// Now the hard bit - we do random work on the assumption
// that the compiler will be used.
System.out.println("Doing random work...");
java.util.Locale.getAvailableLocales();
java.security.Security.getProviders();
java.nio.channels.spi.SelectorProvider.provider();
time = mb.getTotalCompilationTime();
if (time > 0) {
printCompilationTime(time);
} else {
throw new RuntimeException("getTimeCompilionTime returns 0");
}
}
static void printCompilationTime(long time) {
System.out.println("Total compilation time: " + time + " ms");
}
}
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