BaseSearchIndex loadFromIndex must inovke writer.maybeMerge() after writer.addIndexesNoOptimize(new Directory[] { dir }) use with lucene 3.4

[wangscu]

in Lucene 3.4 writer.addIndexes(new Directory[] { dir }) does not merge any more, so we must inoke maybeMerge after add dir to index. :)

public void loadFromIndex(BaseSearchIndex<R> index) throws IOException
{
    // hao: open readOnly ram index reader
    ZoieIndexReader<R> reader = index.openIndexReader();
    if (reader == null)
        return;

    Directory dir = reader.directory();

    // hao: delete docs in disk index
    LongSet delDocs = _delDocs;
    clearDeletes();
    deleteDocs(delDocs);

    // hao: merge the readOnly ram index with the disk index
    IndexWriter writer = null;
    try
    {
        writer = openIndexWriter(null, null);
        writer.addIndexes(new Directory[] { dir });
        writer.maybeMerge();
    } finally
    {
        closeIndexWriter();
    }
} 

[javasoze]

isn't maybeMerge already added in the code? If not, we will just need to merge up.