Question

I’m developing Java MIDI application.

And I have stuck with debugging of exception, which dispatching at the end of song. As I’m expecting: the application is playing and each time I’m checking the sequence tick position to represent it in application playback line, like as player.

So I want to know how could I get the source or the point where this Thread start running?

Below is an exception output:

Exception in thread "Thread-23" java.lang.IllegalStateException: Sequencer is not open
    at org.tritonus.share.midi.TSequencer.checkOpen(TSequencer.java:296)
    at org.tritonus.share.midi.TSequencer.stop(TSequencer.java:256)
    at org.tritonus.midi.device.java.JavaSequencer.run(JavaSequencer.java:291)
    at java.lang.Thread.run(Unknown Source)

Answer 1

org/tritonus/midi/device/java/JavaSequencer.java has the following code:

protected void openImpl()
    {
            ...
            m_thread = new Thread(this);
            ...
            m_thread.start();
    }

So that’s one place to look for (but that answers only the specific case, not the general question how to find out where a thread is started in general).

There are also other places in the same class where this.start() is called: in setSequence(..) and setTickPosition(..). There could be calls to start() outside the class however.