test/jdk/jdk/jfr/jcmd/TestJcmdStartStopDefault.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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package jdk.jfr.jcmd;

import java.io.File;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import jdk.test.lib.Asserts;
import jdk.test.lib.jfr.FileHelper;
import jdk.test.lib.process.OutputAnalyzer;

/*
 * @test
 * @summary Start a recording without name.
 * @key jfr
 * @library /test/lib /test/jdk
 * @run main/othervm jdk.jfr.jcmd.TestJcmdStartStopDefault
 */
public class TestJcmdStartStopDefault {

    public static void main(String[] args) throws Exception {
        File recording = new File("TestJcmdStartStopDefault.jfr");

        OutputAnalyzer output = JcmdHelper.jcmd("JFR.start");
        JcmdAsserts.assertRecordingHasStarted(output);

        String name = parseRecordingName(output);
        name= "Recording-" + name;
        JcmdHelper.waitUntilRunning(name);

        output = JcmdHelper.jcmd("JFR.dump",
                "name=" + name,
                "filename=" + recording.getAbsolutePath());
        JcmdAsserts.assertRecordingDumpedToFile(output, name, recording);
        JcmdHelper.stopAndCheck(name);
        FileHelper.verifyRecording(recording);
    }

    private static String parseRecordingName(OutputAnalyzer output) {
        // Expected output:
        // Started recording recording-1. No limit (duration/maxsize/maxage) in use.
        // Use JFR.dump name=recording-1 filename=FILEPATH to copy recording data to file.

        String stdout = output.getStdout();
        Pattern p = Pattern.compile(".*Use JFR.dump name=(\\S+).*", Pattern.DOTALL);
        Matcher m = p.matcher(stdout);
        Asserts.assertTrue(m.matches(), "Could not parse recording name");
        String name = m.group(1);
        System.out.println("Recording name=" + name);
        return name;
    }
}