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