On 10/08/16 15:33, Abduladem Eljamel wrote:
Hi AndyThankyou agian.Does upgrading Jena from ver 2.x to 3.x require a lot of
code changing?ThanksAbdul
http://jena.staging.apache.org/documentation/migrate_jena2_jena3.html
Change some package names.
Note it's RDF 1.1
From: Andy Seaborne <[email protected]>
To: [email protected]
Sent: Wednesday, 10 August 2016, 14:40
Subject: Re: Model Inconsisten
On 10/08/16 14:36, Abduladem Eljamel wrote:
Hi Andy
Thanks for answering my question.Is this code only for version 3.0 and higher?
It should work for earlier but I've not checked ... upgrading would be a
very good idea to pick all the improvements.
Do we need to close the model or commit and end the dataset are enough?
No need to close.
The dataset is more important than the model, which is just a view of
part of the database.
Andy
ThanksAbdul
From: Andy Seaborne <[email protected]>
To: [email protected]
Sent: Wednesday, 10 August 2016, 13:13
Subject: Re: Model Inconsisten
On 10/08/16 12:57, Abduladem Eljamel wrote:
Hi,,I hope everyone is fine.I would like to know the difference between code 1
andcode 2 below. When can each one be used for?
What is "NoSuchElementException" Exception andmodel inconsistent?If there is a
reference to cite the explanation,please tell me. ThanksAbdul---------------------
code 1:
Dataset dataset = TDBFactory.createDataset(location);Model model =
dataset.getDefaultModel();
try { dataset.begin(ReadWrite.WRITE) ;
// write triples to model
dataset.commit() ;
} finally {
dataset.end() ;
}----------code 2:Dataset dataset = TDBFactory.createDataset(location);Model
model = dataset.getDefaultModel();try {
model.enterCriticalSection(Lock.WRITE);
// write triples to model
model.commit();
TDB.sync(model);
} finally {
model.leaveCriticalSection();
}
The correct form (all 3.x versions):
Dataset dataset = TDBFactory.createDataset(location);
dataset.begin(ReadWrite.WRITE) ;
try {
// Inside begin-commit.
Model model = dataset.getDefaultModel();
// write triples to model
dataset.commit() ;
} finally {
dataset.end() ;
}
Andy
