NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.

To learn about what's going on, see About the Archive Site.

bundles, scripts question

I'm using 1.3b2, on Linux.

I am trying to automate/script the construction of a jnlp bundle file,
so that the end user can just click on a url and see what I've prepared.
The data is a max wind speed field from a forecast model, with 24 time
steps, for IDV viewing as an animation. Each day as new data arrives, I'd like to re-write the bundle to include the new data (actually a change in url to a http web server where the new data will be) 


I have looked at IDV scripts but they seem to lack some features, e.g
how do I specify fields and times? and controls ?

What I would like to do is this

0. generate today's data, in a netcdf file.  This I can do, and is
outside the domain of IDV, e.g. shell script

1. via a cron-run IDV invocation with an isl parameter, start IDV, load
the nc file, create a display, select a field to display and a display
type.  set some contour levels in the control

2 save to a jnlp bundle

In step 1, I can automate the composition of the .isl file to include
the correct nc file name.

So far I have used the datasource and display isl tags, and I get
errors.  The isl currently looks like this

<isl debug="true" offscreen="false">

<datasource url="2006062900.bis.nc" type="FILE.NETCDF">
  <display type="planviewcontourfilled"/>
</datasource>


</isl>

The top of the stack trace is this:


ava.lang.NullPointerException
        at ucar.unidata.data.DataInstance.getData(DataInstance.java:216)
        at ucar.unidata.data.DataInstance.getData(DataInstance.java:181)
        at 
ucar.unidata.data.grid.GridDataInstance.init(GridDataInstance.java:176)
        at
ucar.unidata.data.grid.GridDataInstance.<init>(GridDataInstance.java:138)
        at
ucar.unidata.idv.control.GridDisplayControl.doMakeDataInstance(GridDisplayControl.java:216)
        at
ucar.unidata.idv.control.DisplayControlImpl.initializeDataInstance(DisplayControlImpl.java:2509)
        at
ucar.unidata.idv.control.DisplayControlImpl.setData(DisplayControlImpl.java:2491)
        at
ucar.unidata.idv.control.PlanViewControl.setData(PlanViewControl.java:390)
        at
ucar.unidata.idv.control.ContourPlanViewControl.setData(ContourPlanViewControl.java:112)
        at 
ucar.unidata.idv.control.PlanViewControl.init(PlanViewControl.java:307)
        
The .nc file loads fine into non-script mode IDV.


I wonder if a non-scripting solution would work.  With a template bundle
file, edit the datasource content, and then somehow convert that bundle
xml to the jnlp style of bundle?  I did see a ref to this idea on the
list. Does it work ? I found a base64 encoder online, but when I run it on a xidv bundle file, its output is not the same as the base64 encoded bundle data in the jnlp bundle which IDV can produce. I was hoping to use a xidv template, replace url strings and encode using the base64 encoder, then add the header and footer jnlp fragments. 


Any help gratefully appreciated

Stuart
  • 2006 messages navigation, sorted by:
    1. Thread
    2. Subject
    3. Author
    4. Date
    5. ↑ Table Of Contents
  • Search the idvusers archives: