public void testFutureCommit() throws Exception {
Directory dir = newDirectory();
IndexWriter w =
new IndexWriter(
dir,
newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()))
.setIndexDeletionPolicy(NoDeletionPolicy.INSTANCE));
Document doc = new Document();
w.addDocument(doc);
// commit to "first"
Map<String, String> commitData = new HashMap<String, String>();
commitData.put("tag", "first");
w.commit(commitData);
// commit to "second"
w.addDocument(doc);
commitData.put("tag", "second");
w.commit(commitData);
w.close();
// open "first" with IndexWriter
IndexCommit commit = null;
for (IndexCommit c : DirectoryReader.listCommits(dir)) {
if (c.getUserData().get("tag").equals("first")) {
commit = c;
break;
}
}
assertNotNull(commit);
w =
new IndexWriter(
dir,
newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()))
.setIndexDeletionPolicy(NoDeletionPolicy.INSTANCE)
.setIndexCommit(commit));
assertEquals(1, w.numDocs());
// commit IndexWriter to "third"
w.addDocument(doc);
commitData.put("tag", "third");
w.commit(commitData);
w.close();
// make sure "second" commit is still there
commit = null;
for (IndexCommit c : DirectoryReader.listCommits(dir)) {
if (c.getUserData().get("tag").equals("second")) {
commit = c;
break;
}
}
assertNotNull(commit);
dir.close();
}