Hi Jean-Marc,
Thank you for the report - especially a link to the complete code as
well as the in-email description and discussion.
This is JENA-571, or rather it's reverse. It looks like there is a bad
side effect due to caching. The closed graph is still in the
DatasetGraph cache and also in the DatasetCache.
I've reopened JENA-571. I suspect that caching of graphs (and models
higher up) is not nearly as import as it once was.
Workaround is to not close models (or datasets).
In TDB, the true state is on-disk and also in a single system wide
object for the location. This is shared, which is essential because it
avoids a lot of disk I/O on opening.creating. .close() isn't really
doing anything much.
Andy
On 29/01/14 12:30, Jean-Marc Vanel wrote:
Hi
Jena 2.11.1 TBD throws ClosedException: "already closed", when 2.11.0 did
not.
The test below involves adding a triple in a named model,
closing the model,
re-opening the dataset and the same model.
Note that closing the whole dataset instead of the model works fine.
Here is the test (sorry , it's in Scala):
@Test def storeTripleinNamedDatasetandRetrieve() {
val directory = new File("bbtest");
directory.mkdirs();
val dataset = TDBFactory.createDataset(directory.getAbsolutePath());
val modelName = "test" // "<test>"
val model = dataset.getNamedModel(modelName);
val obj = "a"
val subject = "c"
val predicate = model.createProperty("p");
val subjectResource = model.createResource(subject);
val objectResource = model.createResource(obj);
model.add(model.createStatement(subjectResource, predicate,
objectResource))
if (!model.isClosed()) {
model.close(); // com.hp.hpl.jena.shared.ClosedException: already
closed
// dataset.close(); // OK!
System.out.println("Test TDB: model closed:\t" + dataset)
}
{
val dataset = TDBFactory.createDataset(directory.getAbsolutePath());
val model = dataset.getNamedModel(modelName);
System.out.println("Test TDB: model reopened:\t" + dataset)
println(
"model.size() " +
model.size())
val sIter = model.listStatements()
for (st <- sIter) {
println(st)
}
assertTrue("model.size == 1", model.size == 1);
}
Complete code:
http://svn.code.sf.net/p/eulergui/code/trunk/eulergui/src/test/scala/eulergui/jena/JenaTDBTest.scala
