/*

 * Copyright (c) 2016, 2017, 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 8153955

 * @summary test the FileHandler's new property

 *  "java.util.logging.FileHandler.maxLocks" which will be present in

 *  "logging.properties" file with default value of 100. This property can be

 *  overriden by specifying this property in the custom config file.

 * @library /test/lib

 * @build jdk.test.lib.Platform

 *        jdk.test.lib.util.FileUtils

 * @author rpatil

 * @run main/othervm FileHandlerMaxLocksTest

 */

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.nio.file.Paths;

import java.util.ArrayList;

import java.util.List;

import java.util.logging.FileHandler;

import jdk.test.lib.util.FileUtils;

public class FileHandlerMaxLocksTest {

    private static final String LOGGER_DIR = "logger-dir";

    private static final String MAX_LOCK_PROPERTY = "java.util.logging.FileHandler.maxLocks = 200";

    private static final String CONFIG_FILE_NAME = "logging.properties";

    public static void main(String[] args) throws Exception {

        File loggerDir = createLoggerDir();

        String configFilePath = loggerDir.getPath() + File.separator + CONFIG_FILE_NAME;

        File configFile = new File(configFilePath);

        createFile(configFile, false);

        System.setProperty("java.util.logging.config.file", configFilePath);

        List<FileHandler> fileHandlers = new ArrayList<>();

        try (FileWriter writer = new FileWriter(configFile)) {

            writer.write(MAX_LOCK_PROPERTY);

            writer.flush();

            // 200 raises the default limit of 100, we try 102 times

            for (int i = 0; i < 102; i++) {

                fileHandlers.add(new FileHandler(loggerDir.getPath() + File.separator + "test_%u.log"));

            }

        } catch (IOException ie) {

            throw new RuntimeException("Test Failed: " + ie.getMessage());

        } finally {

            for (FileHandler fh : fileHandlers) {

                fh.close();

            }

            FileUtils.deleteFileTreeWithRetry(Paths.get(loggerDir.getPath()));

        }

    }

    /**

     * Create a writable directory in user directory for the test

     *

     * @return writable directory created that needs to be deleted when done

     * @throws RuntimeException

     */

    private static File createLoggerDir() throws RuntimeException {

        String userDir = System.getProperty("user.dir", ".");

        File loggerDir = new File(userDir, LOGGER_DIR);

        if (!createFile(loggerDir, true)) {

            throw new RuntimeException("Test failed: unable to create"

                    + " writable working directory "

                    + loggerDir.getAbsolutePath());

        }

        // System.out.println("Created Logger Directory: " + loggerDir.getPath());

        return loggerDir;

    }

    /**

     * @param newFile  File to be created

     * @param makeDirectory  is File to be created is directory

     * @return true if file already exists or creation succeeded

     */

    private static boolean createFile(File newFile, boolean makeDirectory) {

        if (newFile.exists()) {

            return true;

        }

        if (makeDirectory) {

            return newFile.mkdir();

        } else {

            try {

                return newFile.createNewFile();

            } catch (IOException ie) {

                System.err.println("Not able to create file: " + newFile

                        + ", IOException: " + ie.getMessage());

                return false;

            }

        }

    }

}