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 * 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.jvm;

import java.io.FileReader;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.ArrayList;

import java.util.concurrent.Callable;

import jdk.jfr.AnnotationElement;

import jdk.jfr.Configuration;

import jdk.jfr.Description;

import jdk.jfr.Event;

import jdk.jfr.EventFactory;

import jdk.jfr.EventSettings;

import jdk.jfr.EventType;

import jdk.jfr.FlightRecorder;

import jdk.jfr.FlightRecorderListener;

import jdk.jfr.FlightRecorderPermission;

import jdk.jfr.Label;

import jdk.jfr.Recording;

import jdk.jfr.RecordingState;

import jdk.jfr.SettingControl;

import jdk.jfr.ValueDescriptor;

import jdk.jfr.consumer.RecordedClass;

import jdk.jfr.consumer.RecordedEvent;

import jdk.jfr.consumer.RecordedFrame;

import jdk.jfr.consumer.RecordedMethod;

import jdk.jfr.consumer.RecordedObject;

import jdk.jfr.consumer.RecordedStackTrace;

import jdk.jfr.consumer.RecordedThread;

import jdk.jfr.consumer.RecordedThreadGroup;

import jdk.jfr.consumer.RecordingFile;

import jdk.management.jfr.ConfigurationInfo;

import jdk.management.jfr.EventTypeInfo;

import jdk.management.jfr.FlightRecorderMXBean;

import jdk.management.jfr.RecordingInfo;

import jdk.management.jfr.SettingDescriptorInfo;

import jdk.test.lib.Utils;

/**

 * @test TestUnsupportedVM

 * @key jfr

 * @requires vm.hasJFR

 *

 * @modules jdk.jfr

 *          jdk.management.jfr

 *

 * @library /test/lib

 * @run main/othervm -Dprepare-recording=true jdk.jfr.jvm.TestUnsupportedVM

 * @run main/othervm -Djfr.unsupported.vm=true jdk.jfr.jvm.TestUnsupportedVM

 */

public class TestUnsupportedVM {

    private static Path RECORDING_FILE = Paths.get("recording.jfr");

    private static Class<?> [] APIClasses = {

            AnnotationElement.class,

            Configuration.class,

            ConfigurationInfo.class,

            Event.class,

            EventFactory.class,

            EventSettings.class,

            EventType.class,

            EventTypeInfo.class,

            FlightRecorder.class,

            FlightRecorderPermission.class,

            FlightRecorderListener.class,

            FlightRecorderMXBean.class,

            RecordedClass.class,

            RecordedEvent.class,

            RecordedFrame.class,

            RecordedMethod.class,

            RecordedObject.class,

            RecordedStackTrace.class,

            RecordedThread.class,

            RecordedThreadGroup.class,

            Recording.class,

            RecordingFile.class,

            RecordingInfo.class,

            RecordingState.class,

            SettingControl.class,

            SettingDescriptorInfo.class,

       };

    @Label("My Event")

    @Description("My fine event")

    static class MyEvent extends Event {

        int myValue;

    }

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

        if (Boolean.getBoolean("prepare-recording")) {

            Recording r = new Recording(Configuration.getConfiguration("default"));

            r.start();

            r.stop();

            r.dump(RECORDING_FILE);

            r.close();

            return;

        }

        // Class FlightRecorder

        if (FlightRecorder.isAvailable()) {

            throw new AssertionError("JFR should not be available on an unsupported VM");

        }

        if (FlightRecorder.isInitialized()) {

            throw new AssertionError("JFR should not be initialized on an unsupported VM");

        }

        assertIllegalStateException(() -> FlightRecorder.getFlightRecorder());

        assertSwallow(() -> FlightRecorder.addListener(new FlightRecorderListener() {}));

        assertSwallow(() -> FlightRecorder.removeListener(new FlightRecorderListener() {}));

        assertSwallow(() -> FlightRecorder.register(MyEvent.class));

        assertSwallow(() -> FlightRecorder.unregister(MyEvent.class));

        assertSwallow(() -> FlightRecorder.addPeriodicEvent(MyEvent.class, new Runnable() { public void run() {} }));

        assertSwallow(() -> FlightRecorder.removePeriodicEvent(new Runnable() { public void run() {} }));

        // Class Configuration

        if (!Configuration.getConfigurations().isEmpty()) {

            throw new AssertionError("Configuration files should not exist on an unsupported VM");

        }

        Path jfcFile = Utils.createTempFile("empty", ".jfr");

        assertIOException(() -> Configuration.getConfiguration("default"));

        assertIOException(() -> Configuration.create(jfcFile));

        assertIOException(() -> Configuration.create(new FileReader(jfcFile.toFile())));

        // Class EventType

        assertInternalError(() -> EventType.getEventType(MyEvent.class));

        // Class EventFactory

        assertInternalError(() -> EventFactory.create(new ArrayList<>(), new ArrayList<>()));

        // Create a static event

        MyEvent myEvent = new MyEvent();

        myEvent.begin();

        myEvent.end();

        myEvent.shouldCommit();

        myEvent.commit();

        // Trigger class initialization failure

        for (Class<?> c : APIClasses) {

            assertNoClassInitFailure(c);

        }

        // jdk.jfr.consumer.*

        // Only run this part of tests if we are on VM

        // that can produce a recording file

        if (Files.exists(RECORDING_FILE)) {

            for(RecordedEvent re : RecordingFile.readAllEvents(RECORDING_FILE)) {

            }

        }

    }

    private static void assertNoClassInitFailure(Class<?> clazz) {

        try {

            Class.forName(clazz.getName(), true, clazz.getClassLoader());

        } catch (ClassNotFoundException e) {

            throw new AssertionError("Could not find public API class on unsupported VM");

        }

    }

    private static void assertInternalError(Runnable r) {

        try {

            r.run();

        } catch (InternalError e) {

           // OK, as expected

            return;

        }

        throw new AssertionError("Expected InternalError on an unsupported JVM");

    }

    private static void assertIOException(Callable<?> c) {

        try {

            c.call();

        } catch (Exception e) {

            if (e.getClass() == IOException.class) {

                return;

            }

        }

        throw new AssertionError("Expected IOException on an unsupported JVM");

    }

    private static void assertIllegalStateException(Runnable r) throws Exception {

        try {

            r.run();

        } catch (IllegalStateException ise) {

            if (!ise.getMessage().equals("Flight Recorder is not supported on this VM")) {

                throw new AssertionError("Expected 'Flight Recorder is not supported on this VM'");

            }

        }

    }

    private static void assertSwallow(Runnable r) throws Exception {

        try {

            r.run();

        } catch (Exception e) {

            throw new AssertionError("Unexpected exception '" + e.getMessage() + " on an unspported VM");

        }

    }

}