1 /*

     2  * Copyright (c) 2012, 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  * @test

    26  * @bug 7158800

    27  * @run shell/timeout=400 Test7158800.sh

    28  * @summary This test performs poorly if alternate hashing isn't used for

    29  * string table.

    30  * The timeout is handled by the shell file (which kills the process)

    31  */

    32 import java.util.*;

    33 import java.io.*;

    34 

    35 public class InternTest {

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

    37         final String badStringsFilename = "badstrings.txt";

    38 

    39         if (args.length == 0 || (!args[0].equals("bad") && !args[0].equals("normal"))) {

    40             System.out.println("Usage:  java InternTest [normal|bad]");

    41             System.exit(1);

    42         }

    43 

    44         FileInputStream fstream = new FileInputStream(badStringsFilename);

    45         DataInputStream in = new DataInputStream(fstream);

    46         BufferedReader br = new BufferedReader(new InputStreamReader(in));

    47         String toIntern, toDiscard;

    48         int count = 0;

    49         long current = 0L;

    50         long last = System.currentTimeMillis();

    51 

    52         if (args[0].equals("bad")) {

    53             while ((toIntern = br.readLine()) != null) {

    54                 toDiscard = new String((new Integer((int)(Math.random() * Integer.MAX_VALUE))).toString());

    55                 toIntern.intern();

    56                 count++;

    57                 if (count % 10000 == 0 && count != 0) {

    58                     current = System.currentTimeMillis();

    59                     System.out.println(new Date(current) + ": interned " + count + " 0-hash strings - last 10000 took " + ((float)(current - last))/1000 + "s (" + ((float)(current - last))/10000000 + "s per String)");

    60                     last = current;

    61                 }

    62             }

    63         }

    64         if (args[0].equals("normal")) {

    65             while ((toDiscard = br.readLine()) != null) { // do the same read from the file to try and make the test fair

    66                 toIntern = new String((new Integer((int)(Math.random() * Integer.MAX_VALUE))).toString());

    67                 toIntern.intern();

    68                 count++;

    69                 if (count % 10000 == 0 && count != 0) {

    70                     current = System.currentTimeMillis();

    71                     System.out.println(new Date(current) + ": interned " + count + " normal strings - last 10000 took " + ((float)(current - last))/1000 + "s (" + ((float)(current - last))/10000000 + "s per String)");

    72                     last = current;

    73                 }

    74             }

    75         }

    76         in.close();

    77     }

    78 }

    79 

    80