| /* |
| * Copyright (c) 2005, 2012, 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 4652922 |
| * |
| * @summary synopsis: ReliableLog.update should pad records to 4-byte |
| * boundaries |
| * @author Ann Wollrath |
| * |
| * @modules java.rmi/sun.rmi.log |
| * @run main/othervm/timeout=240 LogTest |
| */ |
| |
| import sun.rmi.log.LogHandler; |
| import sun.rmi.log.ReliableLog; |
| import java.io.FileDescriptor; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.Serializable; |
| |
| public class LogTest { |
| |
| private static int crashPoint = 0; |
| private static boolean spansBoundary = false; |
| private static ReliableLog log = null; |
| private static Counter counter = new Counter(); |
| |
| public static void main(String[] args) throws Exception { |
| |
| System.err.println("\nRegression test for bug 4652922\n"); |
| |
| System.setProperty("sun.rmi.log.class", MyLogFile.class.getName()); |
| //System.setProperty("sun.rmi.log.debug", "true"); |
| |
| log = new ReliableLog(".", new TestLogHandler(counter), false); |
| |
| writeUpdatesCrashAndRecover(10, 1, false, 10); |
| writeUpdatesCrashAndRecover(10, 1, true, 20); |
| writeUpdatesCrashAndRecover(10, 2, true, 30); |
| writeUpdatesCrashAndRecover(9, 2, false, 40); |
| writeUpdatesCrashAndRecover(9, 3, true, 50); |
| log.close(); |
| } |
| |
| private static void writeUpdatesCrashAndRecover(int updates, |
| int crashValue, |
| boolean spans, |
| int expectedCount) |
| throws IOException |
| { |
| /* |
| * Write updates |
| */ |
| System.err.println("\nwrite updates: " + updates); |
| for (int i = 0; i < updates; i++) { |
| counter.increment(); |
| log.update(counter); |
| } |
| |
| /* |
| * Crash |
| */ |
| crashPoint = crashValue; |
| spansBoundary = spans; |
| System.err.println("crash during next update on sync #" + |
| crashPoint + |
| " (spansBoundary = " + spansBoundary + ")"); |
| try { |
| System.err.println( |
| "write one update (update record should " + |
| ((counter.value() + 1 == expectedCount) ? "" : "not ") + |
| "be complete)"); |
| counter.increment(); |
| log.update(counter); |
| throw new RuntimeException("failed to reach crashpoint " + |
| crashPoint); |
| } catch (IOException e) { |
| System.err.println("caught IOException; message: " + |
| e.getMessage()); |
| log.close(); |
| } |
| |
| /* |
| * Recover |
| */ |
| log = new ReliableLog(".", new TestLogHandler(null), false); |
| try { |
| System.err.println("recover log"); |
| counter = (Counter) log.recover(); |
| System.err.println("recovered counter value: " + counter.value()); |
| if (counter.value() != expectedCount) { |
| throw new RuntimeException("unexpected counter value " + |
| counter.value()); |
| } |
| System.err.println("log recovery successful"); |
| |
| } catch (IOException e) { |
| System.err.println("log should recover after crash point"); |
| e.printStackTrace(); |
| throw new RuntimeException( |
| "log should recover after crash point"); |
| } |
| |
| } |
| |
| private static class Counter implements Serializable { |
| private static long serialVersionUID = 1; |
| private int count = 0; |
| |
| Counter() {} |
| |
| int increment() { |
| return ++count; |
| } |
| |
| int value() { |
| return count; |
| } |
| |
| void update(Counter value) { |
| if (value.value() < count) { |
| throw new IllegalStateException( |
| "bad update (count = " + count + ", value = " + value + ")"); |
| } else { |
| count = value.value(); |
| } |
| } |
| } |
| |
| static class TestLogHandler extends LogHandler { |
| |
| private final Counter initialState; |
| |
| TestLogHandler(Counter initialState) { |
| this.initialState = initialState; |
| } |
| |
| public Object initialSnapshot() { |
| if (initialState == null) { |
| throw new IllegalStateException( |
| "attempting initialSnapshot with null"); |
| } |
| return initialState; |
| } |
| |
| public Object applyUpdate(Object update, Object state) { |
| ((Counter) state).update((Counter) update); |
| return state; |
| } |
| } |
| |
| public static class MyLogFile extends ReliableLog.LogFile { |
| |
| public MyLogFile(String name, String mode) |
| throws FileNotFoundException, IOException |
| { |
| super(name, mode); |
| } |
| |
| protected void sync() throws IOException { |
| if (crashPoint != 0) { |
| if (--crashPoint == 0) { |
| throw new IOException("crash point reached"); |
| } |
| } |
| super.sync(); |
| } |
| |
| protected boolean checkSpansBoundary(long fp) { |
| return |
| crashPoint > 0 ? spansBoundary : super.checkSpansBoundary(fp); |
| } |
| } |
| } |