Hi Daniele:
Out of your two options I prefer recognise the consistency of using
StructuredGridCoverage2DReader, but I think that GridCoverage2DReader is the
better candidate as it already "owns" an book keeping files (like a property
file for an image pyramid).
Notes:
- I recommend writing a code example of each alternative and see which one
reads better
- I was thinking about this as well with the recent removeSchema method, and
wondering if we need a "FileSet" to capture all the sidecar files for a shape
file and support add/remove/rename. Probably too much of an implementation
detail but you may make something of the idea.
--
Jody Garnett
On 18 November 2013 at 9:47:40 pm, Daniele Romagnoli
(daniele.romagn...@geo-solutions.it) wrote:
Hi list,
I'm working on adding the capability to do a cleanup/delete of a
coverageStore/GridCoverageReader.
Suppose we have a multidimensional ImageMosaic. It's composed of some stuff on
disk (granules, auxiliary files, property files) and a DB with records for the
coverages.
Now suppose we would like to remove the store (as an instance through REST) and
cleanup everything related to it: coverages, records in the DB, granules on
disk, auxiliary files, hidden files.
That work should be delegated to the Reader (it's the only one which has full
knowledge of the data structure) which may delegate some parts to the
underlying readers (you may think about an ImageMosaic of NetCDFs... The
ImageMosaic may delegate some cleanup to the underlying NetCDF readers which
delete hidden files and purge quick access DBs).
Therefore, I would like to know your opinion about where the "delete" method
should be added.
I can see 2 options:
1) StructuredGridCoverage2DReader interface: This interface already supports
createCoverage (to define new coverages), removeCoverage (to remove a specific
coverage), and harvest (to add more granules to a coverage). It could be a good
candidate to adding a delete method to cleanup everything since it already
supports "editing" methods.
2) GridCoverage2DReader interface: This interface is the one which supports
multiple coverages access. It's parent for StructuredGridCoverage2DReader.
Adding the delete method on this base class could be useful for other readers
which doesn't implement StructuredGridCoverage2DReader but which may have the
need to cleanup the store.
In both cases we will add a note to the API stating that not all the reader are
supporting it.
What do you think about it?
The outcome will be used to setup a Proposal.
Please, let me know.
Daniele
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Ing. Daniele Romagnoli
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