Like this question - I'm trying to load in an existing jfr file that has been recorded on another machine external to our organisation. I now want to deobfuscate the information, either as a plugin for JDK Mission Control, or as a utility for reading in a jfc file and writing out a de-obfuscated version.
My class does the relevant implementation of the API
public class JFRProcessor implements IParserExtension {
//impementation details below
And I have tested it (successfully) with the following
List<File> files = new ArrayList<>();
files.add(new File("/user/rafe/Input001.jfr"));
List<IParserExtension> extensions = new ArrayList<>();
extensions.add(new JFRProcessor());
IItemCollection events = JfrLoaderToolkit.loadEvents(files, extensions);
//write out to xml to validate the change
RecordingPrinter printer = new RecordingPrinter(new PrintWriter(new File("/user/rafe/Output0001.xml")), Verbosity.HIGH, false);
printer.print(events);
When I then try to export this as a jar, I have the fully qualified classname (com.extension.JFRProcessor) in the relevant META-INF/services/org.openjdk.jmc.flightrecorder.parser.IParserExtension file - and JDK Mission Control doesn't do anything with the plugin (when put in the drop-ins directory).
This was then verified by exporting the jar and in a separate project (with the exported jar in the build path):
ServiceLoader<IParserExtension> loader = ServiceLoader.load(IParserExtension.class,
IParserExtension.class.getClassLoader());
Another approach that I took was to write out the events:
I have also tried using the latest SNAPSHOT release of JDK Mission Control with the new Recordings class in org.openjdk.jmc.flightrecorder.writer.api but I am struggling to see how to get between the IItemCollection and any useful data to feed into the Recording instance that I'm trying to rewrite into.
final Recording rec = Recordings.newRecording("/user/rafe/Output-001.jfr");
events.forEach(event -> {
IType<IItem> type = event.getType();
rec.writeEvent(typedValue);
});
Any help would be appreciated for either approach - as I'm struggling to see how to use this without de-obfuscating the data first!
