Ruslan Sivak 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.
That's right: your reader is only searching the RAMDirectory; it has
no idea that your RAMDirectory was copied from an FSDirectory that
has now changed. (That ctor for RAMDirectory makes a full copy of
what's currently in the FSDirectory and thereafter maintains no link
to that FSDirectory).
I also had the following code before:
instead of
if (reader==null || !reader.isCurrent())
I had
if (reader==null || reader.getVersion() !=
IndexReader.getCurrentVersion(indexName))
That 2nd line seems like it should have worked. What version of
Lucene are you using? Are you really sure it's not showing the
changes? Can you print the two versions? Every commit to the index
(by IndexWriter) should increment that version number.
I was getting a bunch of this indexreader is closed errors, and I'm
not sure why there's no method like reader.isClosed().
That's spooky: can you explain why you're accidentally using a closed
reader? Your code above seems to replace reader after closing it.
Are there other threads that are using the reader while you are doing
this re-opening?
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?
Your 2nd line above is the right way I think.
Mike
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
