Until we can get realtime search integrated into Lucene (which I'm
gradually trying to working on) I think the answer is no -- for now
you have to keep your own record of which docIDs you've deleted.
Because IndexWriter allows deletes by query and term (and also by
docID, privately, when a document hits a non-aborting exception) it's
tricky to give real-time isDeleted for a docID.
My current thinking on how to do this (once we add realtime search) is
when you ask IndexWriter for a new IndexReader, which searches the
full index in the Directory plus all adds/deletes buffered in
IndexWriter's RAM buffer, it must "materialize" all such buffered
deletes down to docID. Those deletes that are against existing
segments in the index will be flushed at that point to those segments;
the deletes that apply only to buffered docs will be held in RAM and
used by the RAMIndexSearcher that searches IndexWriter's buffer.
Mike
Cam Bazz wrote:
So, apart from the searcher, is there anyway to access the deletion
marks in an indexWriter.
I have a live cache - and I was keeping two caches, ones for new adds,
other for deletes.
I am trying to get rid of deleted cache, and ask the index if a
fetched document is marked deleted.
Best.
-C.B.
On Mon, Sep 15, 2008 at 10:20 PM, Michael McCandless
<[EMAIL PROTECTED]> wrote:
You'll have to open a new IndexReader after the delete is committed.
An IndexReader (or IndexSearcher) only searches the point-in-time
snapshot
of the index as of when it was opened.
Mike
Cam Bazz wrote:
Hello,
Here is what I am trying to do:
dir = FSDirectory.getDirectory("/test");
writer = new IndexWriter(dir, analyzer, true, new
IndexWriter.MaxFieldLength(2));
writer.setMaxBufferedDocs(IndexWriter.DISABLE_AUTO_FLUSH);
Document da = new Document();
da.add(new Field("word", "a", Field.Store.YES,
Field.Index.NOT_ANALYZED_NO_NORMS));
Document db = new Document();
db.add(new Field("word", "b", Field.Store.YES,
Field.Index.NOT_ANALYZED_NO_NORMS));
writer.addDocument(da);
writer.addDocument(db);
writer.commit();
searcher = new IndexSearcher(dir);
writer.deleteDocuments(new Term("word", "a"));
writer.commit();
TopDocCollector collector = new TopDocCollector(10);
searcher.search(new TermQuery(new Term("word","a")),
collector);
ScoreDoc[] hits = collector.topDocs().scoreDocs;
for (int i = 0; i < hits.length; i++) {
int docId = hits[i].doc;
Document d = searcher.doc(docId);
System.out.println(writer.hasDeletions());
System.out.println(searcher.getIndexReader().isDeleted(docId));
System.out.println(d.get("word"));
}
searcher.close();
writer.close();
dir.close();
well I am trying to check if an document has been deleted without
refreshing the searcher. maybe i should access indexreader in a
different way?
the isDeleted() always returns false. that is the problem right now.
Best.
-C.B.
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