[tracecompass-dev] [TC incubator] Data provider and its factory is not c

[tracecompass developer discussions <tracecompass-dev@xxxxxxxxxxx>]

Hi,

I'm implementing a new trace type and try to visualize it by extending the control flow view, but I encountered some problems and would like to ask your help.

Formerly my trace implements IKernelTrace so it could be drawn by the Control Flow View. 

Now I want to make my own trace events types(not only the ones in DefaultEventLayout) such as thread_wait, thread_notify, etc. I also expect to draw more elements on the chart denoting these type of events.

Now I created a ui module for my trace, the view class extends ControlFlowView, and override the getProviderId() function by returning the ID of my extended JpfThreadStatusDataProvider:

    @Override

    protected String getProviderId() {

        return JpfThreadStatusDataProvider.ID;

    }

I've also created a factory for my data provider and try to hook it to the dataprovider point in plugin.xml, and I do like this:

   <extension

         point="org.eclipse.tracecompass.tmf.core.dataprovider">

      <dataProviderFactory

              class="org.eclipse.tracecompass.incubator.internal.jpftrace.ui.view.JpfThreadStatusDataProviderFactory"

              id="org.eclipse.tracecompass.incubator.internal.jpftrace.ui.view.JpfThreadStatusDataProviderFactory">

      </dataProviderFactory>

   </extension>

But from the running and logging, I could see that:

* My view window could be opened, but there's nothing in it. 

        (there should be a graph at least the same as the control flow view if it works)

* The JpfTraceControlFlowView is constructed, and the overrided getProviderId() is called;

* The function createProvider() of my data provider factory is never called;

so my JpfThreadStatusDataProvider is not instantiated.

How should I check if I miss anything for it to work? Or should I do it in another way to create the expected features?

Thank you a lot in advance,

Yang