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Date: Tue, 11 Dec 2007 18:10:44 -0500
From: Ruslan Sivak <rsivak@istandfor.com>
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To: java-user@lucene.apache.org
Subject: Re: Refreshing RAMDirectory
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 <359a92830712111459o620d76c9kb6f4ea3f897f6d41@mail.gmail.com>
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The on-disk index gets updated.  Something like this:
The second indexDoc function is what does the actual indexing, but this 
should have the relevant content. 

public void indexDoc(int userId) throws ClassNotFoundException, 
SQLException, CorruptIndexException, IOException
    {
        IndexWriter iw=new IndexWriter(indexName, analyzer, false);
        deleteDoc(userId, iw);
        ResultSet rs=sg.getSomeData(userId);
        indexDoc(iw,rs);
        iw.close();
    }

Russ


Erick Erickson wrote:
> I can't speak to the errors, but how is the index being updated? An
> indexwriter buffers changes and periodically flushes them out to
> disk. So the writer may not have flushed your data, depending
> upon how it's written.
>
> Best
> Erick
>
> On Dec 11, 2007 5:37 PM, Ruslan Sivak <rsivak@istandfor.com> wrote:
>
>   
>> I have an index of about 10mb.  Since it's so small, I would like to
>> keep it loaded in memory, and reload it about every minute or so,
>> assuming that it has changed on disk.  I have the following code, which
>> works, except it doesn't reload the changes.
>>
>> protected String indexName;
>> protected IndexReader reader;
>> private long lastCheck=0;
>> ...
>> protected IndexReader getReader() throws CorruptIndexException,
>> IOException
>>    {
>>        if (reader==null || System.currentTimeMillis() > lastCheck+60000)
>>        {
>>            lastCheck=System.currentTimeMillis();
>>            if (reader==null || !reader.isCurrent())
>>            {
>>                if (reader!=null)
>>                    reader.close();
>>
>>                Directory dir = new RAMDirectory(indexName);
>>                reader = IndexReader.open(dir);
>>                searcher = new IndexSearcher(reader);
>>            }
>>        }
>>        return reader;
>> }
>>
>>
>> Apparently reader.isCurrent() won't tell you if the underlying
>> FSDirectory has changed.
>>
>> I also had the following code before:
>> instead of
>> if (reader==null || !reader.isCurrent())
>> I had
>> if (reader==null || reader.getVersion() !=
>> IndexReader.getCurrentVersion(indexName))
>>
>>
>> I was getting a bunch of this indexreader is closed errors, and I'm not
>> sure why there's no method like reader.isClosed().
>>
>> Am I going about things the right way?  Is there a better implementation
>> of what I'm looking to do?  Is there perhaps some function I'm not
>> seeing which will let me know if the indexreader is closed?
>>
>> Russ
>>
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>>
>>     
>
>   


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