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From Ian Lea <>
Subject Re: multireader.deleteDocuments transfer to IndexWriter.deleteDocuments ?
Date Tue, 25 Sep 2012 11:05:06 GMT
So you've got a MultiReader over some number of indexes, and in order
to delete stuff matched with that MultiReader you need an IndexWriter
for the specific index that holds the selected term.  In Lucene 4.0.
Is that right?

There are getSequentialSubReaders() and readerIndex(int docID) methods
in the MultiReader hierarchy, and a directory() method in
DirectoryReader, but that's pretty convoluted and readerIndex is
protected so it may not work anyway.  There's probably an easier way
but I can't see it.

Could you just loop round the indexes individually, opening a single
reader on them one at a time?


On Mon, Sep 24, 2012 at 12:21 PM, Naber, Peter <> wrote:
> Hi,
> to migrate my lucene application to the new lucene Version I have to change all deprecated
function to the recommended functions.
> Now I am looking for a solution to migrate the "multireader.deleteDocuments(Term)" to
"IndexWriter.deleteDocuments(Term)" easy.
> The program has a maintenance run, which will read all Terms with a multireader and look
if the original source file at the filesystem exists. If not, the Term will be delete.
> Per Quarter of a year, a new index is created.
> How can I determine the place of the Index in the Filesystem of a Term, to open the right
index with IndexWriter to delete the Term with Indexwriter ??
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