120 lines
3.9 KiB
Java
120 lines
3.9 KiB
Java
/*
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* Copyright (c) 2001, 2010, 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 4486154 4495729
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* @summary The FileChannel file locking
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*/
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import java.io.*;
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import java.nio.channels.*;
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import java.nio.*;
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/**
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* Testing FileChannel's locking methods.
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*/
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public class TryLock {
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public static void main(String[] args) throws Exception {
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test1(true, true);
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test1(false, true);
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test1(true, false);
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test1(false, false);
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test2(true, true);
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test2(false, true);
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test2(true, false);
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test2(false, false);
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test3(true, true);
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test3(false, true);
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test3(true, false);
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test3(false, false);
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}
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public static void test1(boolean shared, boolean trylock) throws Exception {
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File testFile = File.createTempFile("test1", null);
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FileInputStream fis = new FileInputStream(testFile);
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FileChannel fc = fis.getChannel();
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FileLock fl = null;
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try {
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if (trylock)
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fl = fc.tryLock(0, fc.size(), shared);
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else
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fl = fc.lock(0, fc.size(), shared);
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if (!shared)
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throw new RuntimeException("No exception thrown for test1");
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} catch (NonWritableChannelException e) {
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if (shared)
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throw new RuntimeException("Exception thrown for wrong case test1");
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} finally {
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if (fl != null)
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fl.release();
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fc.close();
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testFile.delete();
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}
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}
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public static void test2(boolean shared, boolean trylock) throws Exception {
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File testFile = File.createTempFile("test2", null);
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FileOutputStream fis = new FileOutputStream(testFile);
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FileChannel fc = fis.getChannel();
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FileLock fl = null;
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try {
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if (trylock)
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fl = fc.tryLock(0, fc.size(), shared);
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else
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fl = fc.lock(0, fc.size(), shared);
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if (shared)
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throw new RuntimeException("No exception thrown for test2");
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} catch (NonReadableChannelException e) {
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if (!shared)
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throw new RuntimeException("Exception thrown incorrectly for test2");
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} finally {
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if (fl != null)
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fl.release();
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fc.close();
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testFile.delete();
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}
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}
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public static void test3(boolean shared, boolean trylock) throws Exception {
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File testFile = File.createTempFile("test3", null);
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RandomAccessFile fis = new RandomAccessFile(testFile, "rw");
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FileChannel fc = fis.getChannel();
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try {
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FileLock fl = null;
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if (trylock)
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fl = fc.tryLock(0, fc.size(), shared);
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else
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fl = fc.lock(0, fc.size(), shared);
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fl.release();
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} finally {
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fc.close();
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testFile.delete();
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}
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}
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}
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