Examples of org.apache.lucene.index.IndexWriter.deleteAll()

org.apache.lucene.index.IndexWriter.deleteAll()

Delete all documents in the index.

This method will drop all buffered documents and will remove all segments from the index. This change will not be visible until a {@link #commit()} has been called. This methodcan be rolled back using {@link #rollback()}.

NOTE: this method is much faster than using deleteDocuments( new MatchAllDocsQuery() ).

NOTE: this method will forcefully abort all merges in progress. If other threads are running {@link #forceMerge}, {@link #addIndexes(IndexReader[])} or{@link #forceMergeDeletes} methods, they may receive{@link MergePolicy.MergeAbortedException}s.

      logger.warn("Clearing index..");
      try
      {
        logger.info("NumDocs:" + getIndexReader().numDocs());
        IndexWriter writer = getIndexWriter();
        writer.deleteAll();
        //writer.close(true);
        writer.commit();


        logger.info("NumDocs after delete:" + getIndexReader().numDocs());
      }

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