J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * @test |
| 26 | * @bug 4652922 |
| 27 | * |
| 28 | * @summary synopsis: ReliableLog.update should pad records to 4-byte |
| 29 | * boundaries |
| 30 | * @author Ann Wollrath |
| 31 | * |
| 32 | * @build LogTest |
| 33 | * @run main/othervm/timeout=240 LogTest |
| 34 | */ |
| 35 | |
| 36 | import sun.rmi.log.LogHandler; |
| 37 | import sun.rmi.log.ReliableLog; |
| 38 | import java.io.FileDescriptor; |
| 39 | import java.io.FileNotFoundException; |
| 40 | import java.io.IOException; |
| 41 | import java.io.Serializable; |
| 42 | |
| 43 | public class LogTest { |
| 44 | |
| 45 | private static int crashPoint = 0; |
| 46 | private static boolean spansBoundary = false; |
| 47 | private static ReliableLog log = null; |
| 48 | private static Counter counter = new Counter(); |
| 49 | |
| 50 | public static void main(String[] args) throws Exception { |
| 51 | |
| 52 | System.err.println("\nRegression test for bug 4652922\n"); |
| 53 | |
| 54 | System.setProperty("sun.rmi.log.class", MyLogFile.class.getName()); |
| 55 | //System.setProperty("sun.rmi.log.debug", "true"); |
| 56 | |
| 57 | log = new ReliableLog(".", new TestLogHandler(counter), false); |
| 58 | |
| 59 | writeUpdatesCrashAndRecover(10, 1, false, 10); |
| 60 | writeUpdatesCrashAndRecover(10, 1, true, 20); |
| 61 | writeUpdatesCrashAndRecover(10, 2, true, 30); |
| 62 | writeUpdatesCrashAndRecover(9, 2, false, 40); |
| 63 | writeUpdatesCrashAndRecover(9, 3, true, 50); |
| 64 | log.close(); |
| 65 | } |
| 66 | |
| 67 | private static void writeUpdatesCrashAndRecover(int updates, |
| 68 | int crashValue, |
| 69 | boolean spans, |
| 70 | int expectedCount) |
| 71 | throws IOException |
| 72 | { |
| 73 | /* |
| 74 | * Write updates |
| 75 | */ |
| 76 | System.err.println("\nwrite updates: " + updates); |
| 77 | for (int i = 0; i < updates; i++) { |
| 78 | counter.increment(); |
| 79 | log.update(counter); |
| 80 | } |
| 81 | |
| 82 | /* |
| 83 | * Crash |
| 84 | */ |
| 85 | crashPoint = crashValue; |
| 86 | spansBoundary = spans; |
| 87 | System.err.println("crash during next update on sync #" + |
| 88 | crashPoint + |
| 89 | " (spansBoundary = " + spansBoundary + ")"); |
| 90 | try { |
| 91 | System.err.println( |
| 92 | "write one update (update record should " + |
| 93 | ((counter.value() + 1 == expectedCount) ? "" : "not ") + |
| 94 | "be complete)"); |
| 95 | counter.increment(); |
| 96 | log.update(counter); |
| 97 | throw new RuntimeException("failed to reach crashpoint " + |
| 98 | crashPoint); |
| 99 | } catch (IOException e) { |
| 100 | System.err.println("caught IOException; message: " + |
| 101 | e.getMessage()); |
| 102 | log.close(); |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * Recover |
| 107 | */ |
| 108 | log = new ReliableLog(".", new TestLogHandler(null), false); |
| 109 | try { |
| 110 | System.err.println("recover log"); |
| 111 | counter = (Counter) log.recover(); |
| 112 | System.err.println("recovered counter value: " + counter.value()); |
| 113 | if (counter.value() != expectedCount) { |
| 114 | throw new RuntimeException("unexpected counter value " + |
| 115 | counter.value()); |
| 116 | } |
| 117 | System.err.println("log recovery successful"); |
| 118 | |
| 119 | } catch (IOException e) { |
| 120 | System.err.println("log should recover after crash point"); |
| 121 | e.printStackTrace(); |
| 122 | throw new RuntimeException( |
| 123 | "log should recover after crash point"); |
| 124 | } |
| 125 | |
| 126 | } |
| 127 | |
| 128 | private static class Counter implements Serializable { |
| 129 | private static long serialVersionUID = 1; |
| 130 | private int count = 0; |
| 131 | |
| 132 | Counter() {} |
| 133 | |
| 134 | int increment() { |
| 135 | return ++count; |
| 136 | } |
| 137 | |
| 138 | int value() { |
| 139 | return count; |
| 140 | } |
| 141 | |
| 142 | void update(Counter value) { |
| 143 | if (value.value() < count) { |
| 144 | throw new IllegalStateException( |
| 145 | "bad update (count = " + count + ", value = " + value + ")"); |
| 146 | } else { |
| 147 | count = value.value(); |
| 148 | } |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | static class TestLogHandler extends LogHandler { |
| 153 | |
| 154 | private final Counter initialState; |
| 155 | |
| 156 | TestLogHandler(Counter initialState) { |
| 157 | this.initialState = initialState; |
| 158 | } |
| 159 | |
| 160 | public Object initialSnapshot() { |
| 161 | if (initialState == null) { |
| 162 | throw new IllegalStateException( |
| 163 | "attempting initialSnapshot with null"); |
| 164 | } |
| 165 | return initialState; |
| 166 | } |
| 167 | |
| 168 | public Object applyUpdate(Object update, Object state) { |
| 169 | ((Counter) state).update((Counter) update); |
| 170 | return state; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | public static class MyLogFile extends ReliableLog.LogFile { |
| 175 | |
| 176 | public MyLogFile(String name, String mode) |
| 177 | throws FileNotFoundException, IOException |
| 178 | { |
| 179 | super(name, mode); |
| 180 | } |
| 181 | |
| 182 | protected void sync() throws IOException { |
| 183 | if (crashPoint != 0) { |
| 184 | if (--crashPoint == 0) { |
| 185 | throw new IOException("crash point reached"); |
| 186 | } |
| 187 | } |
| 188 | super.sync(); |
| 189 | } |
| 190 | |
| 191 | protected boolean checkSpansBoundary(long fp) { |
| 192 | return |
| 193 | crashPoint > 0 ? spansBoundary : super.checkSpansBoundary(fp); |
| 194 | } |
| 195 | } |
| 196 | } |