1 /*

     2  * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /*

    25  *

    26  *

    27  * @bug     4858522

    28  * @summary Basic unit test of OperatingSystemMXBean.getTotalSwapSpaceSize()

    29  * @author  Steve Bohne

    30  */

    31 

    32 /*

    33  * This test tests the actual swap size on linux and solaris.

    34  * The correct value should be checked manually:

    35  * Solaris:

    36  *   1. In a shell, enter the command: "swap -l"

    37  *   2. The value (reported in blocks) is in the "blocks" column.

    38  * Linux:

    39  *   1. In a shell, enter the command: "cat /proc/meminfo"

    40  *   2. The value (reported in bytes) is in "Swap" entry, "total" column.

    41  * Windows NT/XP/2000:

    42  *   1. Run Start->Accessories->System Tools->System Information.

    43  *   2. The value (reported in Kbytes) is in the "Page File Space" entry

    44  * Windows 98/ME:

    45  *   Unknown.

    46  *

    47  * Usage: GetTotalSwapSpaceSize <expected swap size | "sanity-only"> [trace]

    48  */

    49 

    50 import com.sun.management.OperatingSystemMXBean;

    51 import java.lang.management.*;

    52 

    53 public class GetTotalSwapSpaceSize {

    54 

    55     private static OperatingSystemMXBean mbean =

    56         (com.sun.management.OperatingSystemMXBean)

    57         ManagementFactory.getOperatingSystemMXBean();

    58 

    59     // Careful with these values.

    60     // Min size for pass dynamically determined below.

    61     // zero if no swap space is configured.

    62     private static long       min_size_for_pass = 0;

    63     private static final long MAX_SIZE_FOR_PASS = Long.MAX_VALUE;

    64 

    65     private static boolean trace = false;

    66 

    67     public static void main(String args[]) throws Exception {

    68         if (args.length > 1 && args[1].equals("trace")) {

    69             trace = true;

    70         }

    71 

    72         long expected_swap_size = 0;

    73 

    74         if (args.length < 1 || args.length > 2) {

    75            throw new IllegalArgumentException("Unexpected number of args " + args.length);

    76         }

    77 

    78 

    79         long min_size = mbean.getFreeSwapSpaceSize();

    80         if (min_size > 0) {

    81             min_size_for_pass = min_size;

    82         }

    83 

    84         long size = mbean.getTotalSwapSpaceSize();

    85 

    86         if (trace) {

    87             System.out.println("Total swap space size in bytes: " + size);

    88         }

    89 

    90         if (!args[0].matches("sanity-only")) {

    91             expected_swap_size = Long.parseLong(args[0]);

    92             if (size != expected_swap_size) {

    93                 throw new RuntimeException("Expected total swap size      : " +

    94                                            expected_swap_size +

    95                                            " but getTotalSwapSpaceSize returned: " +

    96                                            size);

    97             }

    98         }

    99 

   100         if (size < min_size_for_pass || size > MAX_SIZE_FOR_PASS) {

   101             throw new RuntimeException("Total swap space size " +

   102                                        "illegal value: " + size + " bytes " +

   103                                        "(MIN = " + min_size_for_pass + "; " +

   104                                        "MAX = " + MAX_SIZE_FOR_PASS + ")");

   105         }

   106 

   107         System.out.println("Test passed.");

   108     }

   109 }