Don Murray wrote:
>
> - If you have a grib file, say test.grb and index it,then rewrite
> test.grb but it ends up being the same size (maybe you are just changing
> param tables), the index will not get rewritten automatically. There is
> a method that can be used to set this to always rewrite the index if the
> date has changed, but I can't find docs on what it is. Perhaps
> it's GribServiceProvider.setIndexSyncMode()? It would be nice to have
> some javadocs filled in on all these methods, so we know what they
> do. John?
Ive added
http://www.unidata.ucar.edu/software/netcdf-java/reference/Caching.html
and this javadoc:
/**
* This controls the case where the GRIB file has changed, which is detected
by comparing the GRIB
* file length with the file length recorded in the index file. If there is
no index, one will
be created.
* Default is IndexExtendMode.rewrite.
* <ol>
* <li>IndexExtendMode.extend: when GRIB file length increases, extend the
index. This is the case
when the file
* is being appended to, as new data arrives.
* <li>IndexExtendMode.rewrite: when GRIB file length changes, rewrite the
index. This is the
safest thing to do,
* at the expense of performance.
* <li>IndexExtendMode.none: never modify an existing index. If there is no
index, one will be
created.
* </ol>
* @param mode IndexExtendMode when file is opened
*/
static public void setIndexExtendMode(IndexExtendMode mode);
note that it uses file length, not last modified.
thanks for your comments
