/**
* Test what happens if we try to write to a locked taxonomy writer, and see that we can unlock it
* and continue.
*/
@Test
public void testWriterLock() throws Exception {
// native fslock impl gets angry if we use it, so use RAMDirectory explicitly.
Directory indexDir = new RAMDirectory();
TaxonomyWriter tw = new DirectoryTaxonomyWriter(indexDir);
tw.addCategory(new FacetLabel("hi", "there"));
tw.commit();
// we deliberately not close the write now, and keep it open and
// locked.
// Verify that the writer worked:
TaxonomyReader tr = new DirectoryTaxonomyReader(indexDir);
assertEquals(2, tr.getOrdinal(new FacetLabel("hi", "there")));
// Try to open a second writer, with the first one locking the directory.
// We expect to get a LockObtainFailedException.
try {
assertNull(new DirectoryTaxonomyWriter(indexDir));
fail("should have failed to write in locked directory");
} catch (LockObtainFailedException e) {
// this is what we expect to happen.
}
// Remove the lock, and now the open should succeed, and we can
// write to the new writer.
DirectoryTaxonomyWriter.unlock(indexDir);
TaxonomyWriter tw2 = new DirectoryTaxonomyWriter(indexDir);
tw2.addCategory(new FacetLabel("hey"));
tw2.close();
// See that the writer indeed wrote:
TaxonomyReader newtr = TaxonomyReader.openIfChanged(tr);
assertNotNull(newtr);
tr.close();
tr = newtr;
assertEquals(3, tr.getOrdinal(new FacetLabel("hey")));
tr.close();
tw.close();
indexDir.close();
}
