/*

 * Copyright (c) 2019, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 */

package jdk.jfr.api.consumer.streaming;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Path;

import java.util.Properties;

import com.sun.tools.attach.AttachNotSupportedException;

import com.sun.tools.attach.VirtualMachine;

import jdk.jfr.Recording;

import jdk.test.lib.dcmd.CommandExecutor;

import jdk.test.lib.dcmd.PidJcmdExecutor;

/**

 * @test

 * @summary Verifies that it is possible to access JFR repository from a system

 *          property

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib

 * @modules jdk.attach

 *          jdk.jfr

 * @run main/othervm -Djdk.attach.allowAttachSelf=true jdk.jfr.api.consumer.streaming.TestRepositoryProperty

 */

public class TestRepositoryProperty {

    private final static String JFR_REPOSITORY_LOCATION_PROPERTY = "jdk.jfr.repository";

    public static void main(String... args) throws Exception {

        testBeforeInitialization();

        testAfterInitialization();

        testFromAgent();

        testAfterChange();

    }

    private static void testFromAgent() throws AttachNotSupportedException, IOException {

        String pidText = String.valueOf(ProcessHandle.current().pid());

        VirtualMachine vm = VirtualMachine.attach(pidText);

        Properties p = vm.getSystemProperties();

        String location = (String) p.get(JFR_REPOSITORY_LOCATION_PROPERTY);

        if (location == null) {

            throw new AssertionError("Could not find repository path in agent properties");

        }

        Path path = Path.of(location);

        if (!Files.isDirectory(path)) {

            throw new AssertionError("Repository path doesn't point to directory");

        }

    }

    private static void testAfterChange() {

        Path newRepository = Path.of(".").toAbsolutePath();

        String cmd = "JFR.configure repository=" +  newRepository.toString();

        CommandExecutor executor = new PidJcmdExecutor();

        executor.execute(cmd);

        String location = System.getProperty(JFR_REPOSITORY_LOCATION_PROPERTY);

        if (newRepository.toString().equals(location)) {

            throw new AssertionError("Repository path not updated after it has been changed");

        }

    }

    private static void testAfterInitialization() {

        try (Recording r = new Recording()) {

            r.start();

            String location = System.getProperty(JFR_REPOSITORY_LOCATION_PROPERTY);

            if (location == null) {

            }

            System.out.println("repository=" + location);

            Path p = Path.of(location);

            if (!Files.isDirectory(p)) {

                throw new AssertionError("Repository path doesn't point to directory");

            }

        }

    }

    private static void testBeforeInitialization() {

        String location = System.getProperty(JFR_REPOSITORY_LOCATION_PROPERTY);

        if (location != null) {

            throw new AssertionError("Repository path should not exist before JFR is initialized");

        }

    }

}