On 04.02.2013 15:53, Andy Seaborne wrote:
On 04/02/13 13:17, A. Anil SINACI wrote:
Hi all,
Having retrieved the default model through Model m =
dataset.getDefaultModel(), I can see that any change on m is persistent
after a TDB.sync in non-transactional or after a commit in transactional
model.
While using named models, after adding a model to the dataset through
dataset.addNamedModel(uri, model), then changes (i.e. adding a new
triple to the model) on this added named model are not persistent on TDB
neither in non-transactional nor in transactional mode. I need to
explicitly call dataset.replaceModel to make the changes persistent.
What I need is to have the same behavior of default model for my named
models added to the dataset. Is the "replaceModel" the only way to
achieve this? Or, should I only work on the default model?
Best,
Anil.
dataset.addNamedModel(uri, model) adds the model at that point in
time, to the dataset. If it's an in-memeory model, it remains an
in-memory model - the contests are copied into the database. Models
can't change their storage technology in their life time.
If you want an updateable view of the model in the dataset use:
Dataset ds = TDBFactory.createDataset("DB") ;
ds.begin(ReadWrite.WRITE) ;
try {
Model m = ds.getNamedModel("http://example/g";) ;
FileManager.get().readModel(m, "D.ttl") ;
// Jena 2.10.0 ---> preferred style
// RDFDataMgr.read(m, "D.ttl") ;
ds.commit() ;
} finally { ds.end() ; }
Andy
I try this with non-transactional TDB however have not been able to
manage yet. Changes on m are not persisted on my side.
Thanks for the answer,
Anil.
