author | zgu |
Tue, 16 Aug 2011 09:18:47 -0400 | |
changeset 10248 | 62296fcbd7cb |
parent 9035 | 1255eb81cc2f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2007, 2011, 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 6631352 |
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* @summary Check that appends are atomic |
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*/ |
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import java.io.File; |
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import java.io.FileOutputStream; |
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import java.util.concurrent.Executors; |
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import java.util.concurrent.ExecutorService; |
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import java.util.concurrent.TimeUnit; |
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public class AtomicAppend { |
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// Before the fix for |
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// 6631352: Implement atomic append mode using FILE_APPEND_DATA (win) |
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// this would fail intermittently on windows |
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void test(String[] args) throws Throwable { |
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final int nThreads = 10; |
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final int writes = 1000; |
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final File file = new File("foo"); |
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file.delete(); |
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try { |
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final ExecutorService es = Executors.newFixedThreadPool(nThreads); |
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for (int i = 0; i < nThreads; i++) |
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es.execute(new Runnable() { public void run() { |
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try { |
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try (FileOutputStream s = new FileOutputStream(file, true)) { |
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for (int j = 0; j < 1000; j++) { |
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s.write((int) 'x'); |
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s.flush(); |
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} |
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} |
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} catch (Throwable t) { unexpected(t); }}}); |
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es.shutdown(); |
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es.awaitTermination(10L, TimeUnit.MINUTES); |
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equal(file.length(), (long) (nThreads * writes)); |
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} finally { |
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file.delete(); |
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} |
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} |
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//--------------------- Infrastructure --------------------------- |
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volatile int passed = 0, failed = 0; |
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void pass() {passed++;} |
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void fail() {failed++; Thread.dumpStack();} |
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void fail(String msg) {System.err.println(msg); fail();} |
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void unexpected(Throwable t) {failed++; t.printStackTrace();} |
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void check(boolean cond) {if (cond) pass(); else fail();} |
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void equal(Object x, Object y) { |
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if (x == null ? y == null : x.equals(y)) pass(); |
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else fail(x + " not equal to " + y);} |
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public static void main(String[] args) throws Throwable { |
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new AtomicAppend().instanceMain(args);} |
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void instanceMain(String[] args) throws Throwable { |
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try {test(args);} catch (Throwable t) {unexpected(t);} |
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System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
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if (failed > 0) throw new AssertionError("Some tests failed");} |
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} |