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 * 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,

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package jdk.jfr.jcmd;

import java.nio.file.Files;

import java.util.ArrayList;

import java.util.List;

import jdk.jfr.internal.Options;

import jdk.test.lib.Asserts;

/*

 * @test

 * @summary The test verifies JFR.configure command

 * @key jfr

 * @library /test/lib /test/jdk

 * @modules jdk.jfr/jdk.jfr.internal

 * @run main/othervm jdk.jfr.jcmd.TestJcmdConfigure

 */

public class TestJcmdConfigure {

    private static final String DUMPPATH = "dumppath";

    private static final String STACK_DEPTH = "stackdepth";

    private static final String GLOBAL_BUFFER_COUNT = "globalbuffercount";

    private static final String GLOBAL_BUFFER_SIZE = "globalbuffersize";

    private static final String THREAD_BUFFER_SIZE = "thread_buffer_size";

    private static final String MAX_CHUNK_SIZE = "maxchunksize";

    private static final String SAMPLE_THREADS = "samplethreads";

    private static final String UNSUPPORTED_OPTION = "unsupportedoption";

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

        //

        // Simple sanity tests against what is available in Java,

        // before Flight Recorder is loaded. To do:

        //

        // - set values when JFR is running, check for errors.

        // - validate against output from JFR.configure

        // - where feasible, check if they are respected

        //

        String dumpPath = Files.createTempDirectory("dump-path").toAbsolutePath().toString();

        test(DUMPPATH, dumpPath);

        test(STACK_DEPTH, 15);

        test(GLOBAL_BUFFER_COUNT, 7);

        test(GLOBAL_BUFFER_SIZE, 6);

        test(THREAD_BUFFER_SIZE, 5);

        test(MAX_CHUNK_SIZE, 14 * 1000 * 1000);

        test(SAMPLE_THREADS, false);

        test(SAMPLE_THREADS, true);

        testNegative(UNSUPPORTED_OPTION, 100000);

        testNegative(MAX_CHUNK_SIZE, -500);

        if (!testExceptions.isEmpty()) {

            for (Exception e : testExceptions) {

                System.out.println("Error: " + e.getMessage());

            }

            throw testExceptions.get(0);

        }

    }

    private static List<Exception> testExceptions = new ArrayList<>();

    private static void test(String configName, Object value) {

        JcmdHelper.jcmd("JFR.configure", configName + "=" + value);

        Object actualValue = getOption(configName);

        System.out.format("Test param='%s', expected='%s', actual='%s'%n", configName, value, actualValue);

        try {

            // Need convert to string to compare Integer and Long

            Asserts.assertEquals(value.toString(), actualValue.toString(), "Wrong JFR.configure " + configName);

        } catch (Exception e) {

            testExceptions.add(e);

        }

    }

    private static void testNegative(String configName, Object value) {

        try {

            // Syntactically invalid arguments are catched by the JCMD framework where an error code of 1 is returned.

            // Syntactically valid arguments that are semantically invalid (invalid value ranges for example) are handled by JFR code, it will always return a value of 0.

            JcmdHelper.jcmd(configName.equals(UNSUPPORTED_OPTION) ? 1 : 0, "JFR.configure", configName + "=" + value);

        } catch(Exception e) {

            testExceptions.add(e);

        }

    }

    private static Object getOption(String name) {

        switch (name) {

            case DUMPPATH: return Options.getDumpPath().toString();

            case STACK_DEPTH: return Options.getStackDepth();

            case GLOBAL_BUFFER_COUNT: return Options.getGlobalBufferCount();

            case GLOBAL_BUFFER_SIZE: return Options.getGlobalBufferSize();

            case THREAD_BUFFER_SIZE: return Options.getThreadBufferSize();

            case MAX_CHUNK_SIZE: return Options.getMaxChunkSize();

            case SAMPLE_THREADS: return Options.getSampleThreads();

            default: throw new RuntimeException("Unknown option " + name);

        }

    }

}