/*
* Copyright ( c ) 2010 , 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
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* questions .
*/
/* @test
* @ bug 4517279
* @ summary Stochastic test of thread - local coder caches
* @ key randomness
*/
import java.nio.*;
import java.nio.charset.*;
import java.util.*;
public class BashCache {
private static final int THREADS = 10 ;
private static final int TRIALS = 1000 ;
private static final Charset[] charsets
= new Charset[] {
Charset.forName("US-ASCII" ),
Charset.forName("UTF-8" ),
Charset.forName("CP1252" ),
Charset.forName("UTF-16BE" ) };
private static volatile boolean failed = false ;
private static class Basher extends Thread {
Random rnd = new Random(System.identityHashCode(this ));
public void run() {
for (int i = 0 ; i < TRIALS; i++) {
Charset cs = charsets[rnd.nextInt(4 )];
try {
if (rnd.nextBoolean()) {
cs.encode("hi mom" );
} else {
cs.decode(ByteBuffer.wrap(new byte [] {
(byte )'x' , (byte )'y' ,
(byte )'z' , (byte )'z' ,
(byte )'y' }));
}
} catch (Exception x) {
x.printStackTrace();
failed = true ;
return ;
}
if (rnd.nextBoolean())
Thread .yield();
}
}
}
public static void main(String[] args) throws Exception {
Charset cs = Charset.forName("us-ascii" );
Basher[] bashers = new Basher[THREADS];
for (int i = 0 ; i < THREADS; i++) {
bashers[i] = new Basher();
bashers[i].start();
}
for (int i = 0 ; i < THREADS; i++)
bashers[i].join();
if (failed)
throw new Exception("Test failed" );
}
}
Messung V0.5 in Prozent C=98 H=81 G=89
¤ Dauer der Verarbeitung: 0.18 Sekunden
(vorverarbeitet am 2026-10-11)
¤
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