/*

 * Copyright (c) 2013, 2016, 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.*;

import java.util.logging.*;

import sun.util.logging.PlatformLogger;

/*

 * @test

 * @bug 8005615

 * @summary A LogManager subclass overrides its own implementation of named

 *          logger (see the subclassing information in the Logger class specification)

 *

 * @modules java.base/sun.util.logging

 *          java.logging

 * @compile -XDignore.symbol.file CustomLogManager.java SimpleLogManager.java

 * @run main/othervm -Djava.util.logging.manager=SimpleLogManager SimpleLogManager

 */

public class SimpleLogManager extends CustomLogManager {

    public static void main(String[] args) {

        String classname = System.getProperty("java.util.logging.manager");

        if (!classname.equals("SimpleLogManager")) {

            throw new RuntimeException("java.util.logging.manager not set");

        }

        Logger logger = Logger.getLogger(SimpleLogManager.class.getName());

        Logger.getLogger("org.foo.bar.Foo");

        // a platform logger used by the system code is just a Logger instance.

        PlatformLogger.getLogger("org.openjdk.core.logger");

        LogManager mgr = LogManager.getLogManager();

        if (mgr != CustomLogManager.INSTANCE || !(mgr instanceof SimpleLogManager)) {

             throw new RuntimeException(LogManager.getLogManager() + " not SimpleLogManager");

        }

        checkCustomLogger(SimpleLogManager.class.getName(), null);

        checkCustomLogger("org.foo.bar.Foo", null);

        checkCustomLogger("org.openjdk.core.logger", "sun.util.logging.resources.logging");

        // ## The LogManager.demandLogger method does not handle custom log manager

        // ## that overrides the getLogger method to return a custom logger

        // ## (see the test case in 8005640).  Logger.getLogger may return

        // ## a Logger instance but LogManager overrides it with a custom Logger

        // ## instance like this case.

        //

        // However, the specification of LogManager and Logger subclassing is

        // not clear whether this is supported or not.  The following check

        // just captures the current behavior.

        if (logger instanceof CustomLogger) {

            throw new RuntimeException(logger + " not CustomLogger");

        }

    }

    private static void checkCustomLogger(String name, String resourceBundleName) {

        CustomLogManager.checkLogger(name, resourceBundleName);

        Logger logger1 = Logger.getLogger(name);

        Logger logger2 = LogManager.getLogManager().getLogger(name);

        if (logger1 != logger2) {

            throw new RuntimeException(logger1 + " != " + logger2);

        }

        if (!(logger1 instanceof CustomLogger)) {

            throw new RuntimeException(logger1 + " not CustomLogger");

        }

    }

    /*

     * This SimpleLogManager overrides the addLogger method to replace

     * the given logger with a custom logger.

     *

     * It's unclear what the recommended way to use custom logger is.

     * A LogManager subclass might override the getLogger method to return

     * a custom Logger and create a new custom logger if not exist so that

     * Logger.getLogger() can return a custom Logger instance but that violates

     * the LogManager.getLogger() spec which should return null if not found.

     */

    public synchronized boolean addLogger(Logger logger) {

        String name = logger.getName();

        if (namedLoggers.containsKey(name)) {

            return false;

        }

        CustomLogger newLogger = new CustomLogger(logger);

        return super.addLogger(newLogger);

    }

    public class CustomLogger extends Logger {

        final Logger keepRef; // keep a strong reference to avoid GC.

        CustomLogger(Logger logger) {

            super(logger.getName(), logger.getResourceBundleName());

            keepRef = logger;

        }

    }

}