| /* |
| * Copyright (c) 2015, 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. |
| */ |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| import java.util.concurrent.Phaser; |
| import java.util.concurrent.Semaphore; |
| import java.util.logging.Handler; |
| import java.util.logging.LogManager; |
| import java.util.logging.Logger; |
| |
| |
| /** |
| * @test |
| * @bug 7113878 |
| * @summary This is not a test that will check that 7113878 is fixed, but |
| * rather a test that will invoke the modified code & try to verify |
| * that fixing 7113878 has not introduced some big regression. |
| * This test should pass, whether 7113878 is there or not. |
| * @run main/othervm TestLoggerNames |
| * @author danielfuchs |
| */ |
| public class TestLoggerNames { |
| |
| static final class TestLogger extends java.util.logging.Logger { |
| |
| final Semaphore sem = new Semaphore(0); |
| final Semaphore wait = new Semaphore(0); |
| |
| public TestLogger(String name, String resourceBundleName) { |
| super(name, resourceBundleName); |
| } |
| |
| @Override |
| public Handler[] getHandlers() { |
| boolean found = false; |
| try { |
| System.out.println("Entering "+getName()+" getHandlers()"); |
| for (StackTraceElement ste : Thread.currentThread().getStackTrace()) { |
| if (LogManager.class.getName().equals(ste.getClassName()) |
| && "reset".equals(ste.getMethodName())) { |
| found = true; |
| System.out.println(getName()+" getHandlers() called by " + ste); |
| } |
| } |
| sem.release(); |
| try { |
| System.out.println("TestLogger: Acquiring wait for "+getName()); |
| wait.acquire(); |
| try { |
| System.out.println("TestLogger: Acquired wait for "+getName()); |
| return super.getHandlers(); |
| } finally { |
| System.out.println("TestLogger: Releasing wait for "+getName()); |
| wait.release(); |
| } |
| } finally { |
| System.out.println("Unblocking "+getName()); |
| sem.acquire(); |
| System.out.println("Unblocked "+getName()); |
| if (found) { |
| System.out.println("Reset will proceed..."); |
| } |
| } |
| } catch (InterruptedException x) { |
| throw new IllegalStateException(x); |
| } |
| } |
| } |
| |
| static volatile boolean stop; |
| static volatile Throwable resetFailed; |
| static volatile Throwable checkLoggerNamesFailed; |
| static volatile Phaser phaser = new Phaser(2); |
| |
| |
| static void checkLoggerNames(List<Logger> loggers) { |
| Enumeration<String> names = LogManager.getLogManager().getLoggerNames(); |
| if (names instanceof Iterator) { |
| for (Iterator<?> it = Iterator.class.cast(names); it.hasNext(); ) { |
| try { |
| it.remove(); |
| throw new RuntimeException("Iterator supports remove!"); |
| } catch (UnsupportedOperationException x) { |
| System.out.println("OK: Iterator doesn't support remove."); |
| } |
| } |
| // We're not supposed to come here, but if we do then we |
| // need to rewind names... |
| names = LogManager.getLogManager().getLoggerNames(); |
| } |
| |
| List<String> loggerNames = Collections.list(names); |
| if (!loggerNames.contains("")) { |
| throw new RuntimeException("\"\"" + |
| " not found in " + loggerNames); |
| } |
| if (!loggerNames.contains("global")) { |
| throw new RuntimeException("global" + |
| " not found in " + loggerNames); |
| } |
| for (Logger l : loggers) { |
| if (!loggerNames.contains(l.getName())) { |
| throw new RuntimeException(l.getName() + |
| " not found in " + loggerNames); |
| } |
| } |
| System.out.println("Got all expected logger names"); |
| } |
| |
| |
| public static void main(String[] args) throws InterruptedException { |
| LogManager.getLogManager().addLogger(new TestLogger("com.foo.bar.zzz", null)); |
| try { |
| Logger.getLogger(null); |
| throw new RuntimeException("Logger.getLogger(null) didn't throw expected NPE"); |
| } catch (NullPointerException x) { |
| System.out.println("Got expected NullPointerException for Logger.getLogger(null)"); |
| } |
| List<Logger> loggers = new CopyOnWriteArrayList<>(); |
| loggers.add(Logger.getLogger("one.two.addMeAChild")); |
| loggers.add(Logger.getLogger("aaa.bbb.replaceMe")); |
| loggers.add(Logger.getLogger("bbb.aaa.addMeAChild")); |
| TestLogger test = (TestLogger)Logger.getLogger("com.foo.bar.zzz"); |
| loggers.add(Logger.getLogger("ddd.aaa.addMeAChild")); |
| |
| checkLoggerNames(loggers); |
| |
| Thread loggerNamesThread = new Thread(() -> { |
| try { |
| while (!stop) { |
| // Make a defensive copy of the list of loggers that we pass |
| // to checkLoggerNames - in order to make sure that |
| // we won't see new loggers that might appear after |
| // checkLoggerNames has called LogManager.getLoggerNames(). |
| // ('loggers' is a live list and the main thread adds and |
| // and removes loggers from it concurrently to this thread). |
| checkLoggerNames(new ArrayList<>(loggers)); |
| Thread.sleep(10); |
| if (!stop) { |
| phaser.arriveAndAwaitAdvance(); |
| } |
| } |
| } catch (Throwable t) { |
| t.printStackTrace(System.err); |
| checkLoggerNamesFailed = t; |
| // makes sure the main thread isn't going to wait |
| // forever waiting for this dead thread to arrive at the |
| // phaser. |
| phaser.arrive(); |
| } |
| }, "loggerNames"); |
| |
| Thread resetThread = new Thread(() -> { |
| try { |
| System.out.println("Calling reset..."); |
| LogManager.getLogManager().reset(); |
| System.out.println("Reset done..."); |
| System.out.println("Reset again..."); |
| LogManager.getLogManager().reset(); |
| System.out.println("Reset done..."); |
| } catch(Throwable t) { |
| resetFailed = t; |
| System.err.println("Unexpected exception or error in reset Thread"); |
| t.printStackTrace(System.err); |
| } |
| }, "reset"); |
| |
| resetThread.setDaemon(true); |
| resetThread.start(); |
| |
| System.out.println("Waiting for reset to get handlers"); |
| test.sem.acquire(); |
| try { |
| loggerNamesThread.start(); |
| System.out.println("Reset has called getHandlers on " + test.getName()); |
| int i = 0; |
| for (Enumeration<String> e = LogManager.getLogManager().getLoggerNames(); |
| e.hasMoreElements();) { |
| String name = e.nextElement(); |
| if (name.isEmpty()) continue; |
| if (name.endsWith(".addMeAChild")) { |
| Logger l = Logger.getLogger(name+".child"); |
| loggers.add(l); |
| System.out.println("*** Added " + l.getName()); |
| i++; |
| } else if (name.endsWith("replaceMe")) { |
| Logger l = Logger.getLogger(name); |
| loggers.remove(l); |
| l = Logger.getLogger(name.replace("replaceMe", "meReplaced")); |
| loggers.add(l); |
| // Give some chance to the loggerNames thread to arrive at the |
| // phaser first. We don't really care if the logger is actually |
| // replaced this turn - or the next. |
| Thread.sleep(100); |
| System.gc(); |
| if (LogManager.getLogManager().getLogger(name) == null) { |
| // The original logger may not have been gc'ed yet, since |
| // it could still be referenced by the list being processed |
| // by the loggerNamesThread, if that thread hasn't arrived |
| // to the phaser yet... |
| System.out.println("*** "+ name |
| + " successfully replaced with " + l.getName()); |
| } |
| i++; |
| } else { |
| System.out.println("Nothing to do for logger: " + name); |
| } |
| if (checkLoggerNamesFailed != null) { |
| // The checkLoggerNames thread failed. No need to |
| // continue. |
| break; |
| } |
| // Waits for the checkLoggerNamesThread to arrive |
| phaser.arriveAndAwaitAdvance(); |
| if (i >= 3 && i++ == 3) { |
| System.out.println("Loggers are now: " + |
| Collections.list(LogManager.getLogManager().getLoggerNames())); |
| test.wait.release(); |
| test.sem.release(); |
| System.out.println("Joining " + resetThread); |
| resetThread.join(); |
| } |
| } |
| } catch (RuntimeException | InterruptedException | Error x) { |
| test.wait.release(); |
| test.sem.release(); |
| throw x; |
| } finally { |
| stop = true; |
| phaser.arriveAndDeregister(); |
| loggerNamesThread.join(); |
| loggers.clear(); |
| } |
| |
| |
| if (resetFailed != null || checkLoggerNamesFailed != null) { |
| RuntimeException r = new RuntimeException("Some of the concurrent threads failed"); |
| if (resetFailed != null) r.addSuppressed(resetFailed); |
| if (checkLoggerNamesFailed != null) r.addSuppressed(checkLoggerNamesFailed); |
| throw r; |
| } |
| |
| } |
| |
| } |