Question on writing custom UpdateHandler

[Mark]

I am trying to write my own custom UpdateHandler that extends 
DirectUpdateHandler2.

I would like to be able to query the current state of the index within 
the addDoc method. How would I be able to accomplish this?

I tried something like the following but it was a big fat fail as it 
quickly created an enormous amount of indexes files and I received a 
"too many open files" exception.

/iwCommit.lock();
try {
    openWriter();
    docs = new IndexSearcher(writer.getReader()).search(query, MAX_DOCS);
} finally {
    iwCommit.unlock();
}/

I'm guessing the call to new IndexSearcher is at fault but I'm unsure of 
a way around this.

Thanks for your help!