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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