how to parse a JFR file in Oracle JDK7 or JDK8 programatically?

Question

The API for Oracle JDK14, and JDK15 is published at https://docs.oracle.com/en/java/javase/14/jfapi/parsing-recording-file.html but I couldn't find similar documentation for Oracle JDK8.

I was wondering if someone was able to print out the list of events for a JFR file collected with JDK8, just like in the example shown by the docs for JDK14, and JDK15. In that case, what is the role of <jdk1.8>\jre\lib\jfr.jar file?

Answer 1

The code for JDK8 was posted by Marcus in an external site:

import java.io.File;
import java.io.IOException;
import java.util.Iterator;

import oracle.jrockit.jfr.parser.*;

public class JDKParserTest {
    @SuppressWarnings("deprecation")
    public static void main(String[] args) throws IOException {
        File recordingFile = new File("C:\\demo\\wldf.jfr");
        Parser parser = new Parser(recordingFile);
        int count = 0;
        Iterator<ChunkParser> chunkIter = parser.iterator();
        while (chunkIter.hasNext()) {           
            ChunkParser chunkParser = chunkIter.next();
            for (FLREvent event : chunkParser) {
                count++;
                //System.out.println(event.toString());
            }
        }
        parser.close();
        System.out.println("Found " + count + " events");
    }
} 

That's exactly what I needed to build a custom report. Ref: http://hirt.se/blog/?p=446