[Paraview] Triggering execution on an asynchronous event

[Kent Eschenberg]

The answer to Greg's question would also be helpful to us.

We are running an application on a parallel system and would like to use ParaView to monitor its output in real time.

The app will be writing time steps (where each is a set of files, one from each processor) directly to the Linux PC where ParaView is running. ParaView will be reading these files via a pvd file that describes all the time steps including the ones not
yet written by the app.

However, we are missing one critical piece: how do we coax ParaView to notice that the next time step (i.e., the next set of files) has arrived - and to go read them?

The most elegant solution to this, and Greg's question, would be to identify, in the server, something like a background loop, and then add a call to a new routine (that we write) that looks for our special event (a message, a new file, whatever) and
then kicks off a change.

Kent
Pittsburgh Supercomputing Center


--On 10/17/2006 01:30:08 PM -0400 gabra at us.ibm.com wrote:

> I have a Paraview source module thats connected to an external process by 
> a socket.  When that process sees fit, it will send a message to the 
> source module that new data is ready.  It will then pass the data over, 
> and the source module will grab it.  On the next RequestData, the source 
> module will update its outputs with the new data.  Unfortunately, I can't 
> seem to figure out how to trigger the pipeline (maybe I don't have the 
> right terminology here) to cause the pipeline to run and the render window 
> to update. 
> 
> One complication is that I'm in client/server mode, and right now the 
> client is not connected to the external process, just the source modules 
> that run in the server processes.
> 
> Can anybody give me an idea of how this should be done?  I'm new to PV 
> (and have the book on order).  I could be going at this all wrong, for all 
> I know.
>  
> Thanks.
> 
> Greg