Hi,
at one point, if TDBMaker we had a method called clearDatasetCache().
I have been using that method in a @Before setup method of a test [1]:
@Before public void setup() {
if ( FileOps.exists(output) ) {
FileOps.clearDirectory(output) ;
} else {
FileOps.ensureDir(output);
}
// I don't understand why this is necessary... :-/
TDBMaker.clearDatasetCache();
}
Notice the silly comment.
The test loads some data into a TDB store on disk:
Location location = new Location(output);
DatasetGraphTDB dsgDisk =
(DatasetGraphTDB)TDBFactory.createDatasetGraph(location);
TDBLoader.load(dsgDisk, urls);
It loads the same data in memory:
DatasetGraphTDB dsgMem =
(DatasetGraphTDB)TDBFactory.createDatasetGraph();
TDBLoader.load(dsgMem, urls);
It deletes and regenerate the node2id.idn and node2id.dat files on disk:
NodeTableRewriter.fixNodeTable2(location, log, null);
Finally, it asserts the memory and disk TDB datasets are isomorphic:
assertTrue ( tdbloader4.dump(dsgMem, dsgDisk), tdbloader4.isomorphic (
dsgMem, dsgDisk ) );
Everything is fine, datasets are isomorphic.
Now, I am trying to update to TDB 0.9.0-incubating in staging at the moment.
The method TDBMaker.clearDatasetCache() is not there anymore.
I tried to replace it:
- TDBMaker.clearDatasetCache();
+ ((CachingTDBMaker)TDBMaker.cachedFactory).flush();
But, it did not work, I now have 3 failures.
So, I tried to use TDBMaker.uncachedFactory.createDatasetGraph(location):
- DatasetGraphTDB dsgDisk =
(DatasetGraphTDB)TDBFactory.createDatasetGraph(location);
+ DatasetGraphTDB dsgDisk =
TDBMaker.uncachedFactory.createDatasetGraph(location);
TDBLoader.load(dsgDisk, urls);
-
- DatasetGraphTDB dsgMem =
(DatasetGraphTDB)TDBFactory.createDatasetGraph();
- TDBLoader.load(dsgMem, urls);
+
+ DatasetGraphTransaction dsgMem =
(DatasetGraphTransaction)TDBFactory.createDatasetGraph();
+ TDBLoader.load(dsgMem.getBaseDatasetGraph(), urls);
This worked.
What's the best way to interact with TDBMaker and clean/reset/flush caches?
Thanks,
Paolo
[1]
https://github.com/castagna/tdbloader4/blob/master/src/test/java/org/apache/jena/tdbloader4/TestNodeTableRewriter.java
