89 lines
3.1 KiB
Java
89 lines
3.1 KiB
Java
/*
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* Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4858522
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* @summary Basic unit test of OperatingSystemMXBean.getFreeSwapSpaceSize()
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* @author Steve Bohne
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*/
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/*
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* This test is just a sanity check and does not check for the correct
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* value. The correct value should be checked manually:
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* Solaris:
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* 1. In a shell, enter the command: "swap -l"
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* 2. The value (reported in blocks) is in the "free" column.
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* Linux:
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* 1. In a shell, enter the command: "cat /proc/meminfo"
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* 2. The value (reported in bytes) is in "Swap" entry, "free" column.
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* Windows NT/XP/2000:
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* Unknown.
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* Windows 98/ME:
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* Unknown.
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*/
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import com.sun.management.OperatingSystemMXBean;
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import java.lang.management.*;
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public class GetFreeSwapSpaceSize {
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private static OperatingSystemMXBean mbean =
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(com.sun.management.OperatingSystemMXBean)
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ManagementFactory.getOperatingSystemMXBean();
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// Careful with these values.
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// Min size is zero since the system can run of swap spaces
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private static final long MIN_SIZE_FOR_PASS = 0;
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// Max size for pass dynamically determined below.
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private static long max_size_for_pass = Long.MAX_VALUE;
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private static boolean trace = false;
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public static void main(String args[]) throws Exception {
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if (args.length > 0 && args[0].equals("trace")) {
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trace = true;
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}
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long max_size = mbean.getTotalSwapSpaceSize();
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if (max_size > 0) {
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max_size_for_pass = max_size;
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}
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long size = mbean.getFreeSwapSpaceSize();
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if (trace) {
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System.out.println("Free swap space size in bytes: " + size);
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}
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if (size < MIN_SIZE_FOR_PASS || size > max_size_for_pass) {
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throw new RuntimeException("Free swap space size " +
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"illegal value: " + size + " bytes " +
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"(MIN = " + MIN_SIZE_FOR_PASS + "; " +
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"MAX = " + max_size_for_pass + ")");
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}
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System.out.println("Test passed.");
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}
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}
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