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package org.openjdk.jmc.rjmx.services.jfr.test;

import static org.junit.Assert.assertTrue;

import java.io.IOException;
import java.io.InputStream;

import org.junit.Test;
import org.openjdk.jmc.common.io.IOToolkit;
import org.openjdk.jmc.common.unit.IConstrainedMap;
import org.openjdk.jmc.common.unit.IDescribedMap;
import org.openjdk.jmc.flightrecorder.configuration.events.EventOptionID;
import org.openjdk.jmc.flightrecorder.configuration.recording.RecordingOptionsBuilder;
import org.openjdk.jmc.rjmx.ConnectionDescriptorBuilder;
import org.openjdk.jmc.rjmx.IConnectionDescriptor;
import org.openjdk.jmc.rjmx.IConnectionHandle;
import org.openjdk.jmc.rjmx.IServerHandle;
import org.openjdk.jmc.rjmx.services.jfr.IFlightRecorderService;
import org.openjdk.jmc.rjmx.services.jfr.IRecordingDescriptor;
import org.openjdk.jmc.rjmx.test.RjmxTestCase;

/**
 * This test suite is supposed to test the example code that we ship with the documentation for the
 * org.openjdk.jmc.rjmx.services.jfr bundle. That is, for each code example included in
 * org.openjdk.jmc.rjmx.services.jfr/src/org/openjdk/jmc/rjmx/services/jfr/package-info.java, there
 * should be a test method in here with a verbatim copy of that code.
 */
// NOTE: If you change the verbatim test YOU MUST update the corresponding package-info.java.
@SuppressWarnings("nls")
public class JfrPackageExampleTest extends RjmxTestCase {

	@Test
	public void testPackageExample1FunctionalityVerbatim() throws Exception {
		IConnectionDescriptor descriptor = new ConnectionDescriptorBuilder().hostName("localhost").port(0).build();
		IServerHandle serverHandle = IServerHandle.create(descriptor);
		IConnectionHandle handle = serverHandle.connect("Get JFR recording info");
		try {
			IFlightRecorderService jfr = handle.getServiceOrThrow(IFlightRecorderService.class);
			for (IRecordingDescriptor desc : jfr.getAvailableRecordings()) {
				System.out.println(desc.getName());
			}
		} finally {
			IOToolkit.closeSilently(handle);
		}
	}

	@Test
	public void testPackageExample2FunctionalityVerbatim() throws Exception {
		IConnectionDescriptor descriptor = new ConnectionDescriptorBuilder().hostName("localhost").port(0).build();
		IServerHandle serverHandle = IServerHandle.create(descriptor);
		IConnectionHandle handle = serverHandle.connect("Start time bound flight recording");
		try {
			IFlightRecorderService jfr = handle.getServiceOrThrow(IFlightRecorderService.class);

			long duration = 5000;
			IDescribedMap<EventOptionID> defaultEventOptions = jfr.getDefaultEventOptions();
			IConstrainedMap<String> recordingOptions = new RecordingOptionsBuilder(jfr).name("MyRecording")
					.duration(duration).build();
			IRecordingDescriptor recording = jfr.start(recordingOptions, defaultEventOptions);
			Thread.sleep(duration);
			while (recording.getState() != IRecordingDescriptor.RecordingState.STOPPED) {
				Thread.sleep(1000);
				recording = jfr.getUpdatedRecordingDescription(recording);
			}
			InputStream is = jfr.openStream(recording, true);
			writeStreamToFile(is);
		} finally {
			IOToolkit.closeSilently(handle);
		}
	}

	private void writeStreamToFile(InputStream in) throws IOException {
		// Just read and count bytes in the test...
		int count = 0;
		try {
			byte[] buf = new byte[1024 * 1024];
			int len;
			while ((len = in.read(buf)) > 0) {
				count += len;
			}
		} finally {
			in.close();
		}
		assertTrue(count > 0);
	}
}