Re: Is opening IndexReader multiple times safe?

[Satoshi Hasegawa]

Thank you, Luke. I decided to branch (use multiple try/catch clauses) so 
that I know if the IndexReader is open or not. Your remark on locking was 
helpful for my understanding of Lucene anyway.

----- Original Message ----- 
From: "Luke Shannon" <[EMAIL PROTECTED]>
To: "Lucene Users List" <[EMAIL PROTECTED]>
Sent: Tuesday, November 16, 2004 11:45 AM
Subject: Re: Is opening IndexReader multiple times safe?


> Hi Satoshi;
>
> I troubled shooted a problem similar to this by moving around a
> IndexReader.isLocked(indexFileLocation) to determine exactly when the 
> reader
> was closed.
>
> Note: the method throws an error if the index file doesn't exist that you
> are checking on.
>
> Luke
>
> ----- Original Message ----- 
> From: "Satoshi Hasegawa" <[EMAIL PROTECTED]>
> To: "Lucene Users List" <[EMAIL PROTECTED]>
> Sent: Monday, November 15, 2004 8:25 PM
> Subject: Is opening IndexReader multiple times safe?
>
>
>> Hello,
>>
>> I need to handle IOExceptions that arise from index access
>> (IndexReader#open, #delete, IndexWriter#optimize etc.), and I'm not sure
> if
>> the IndexReader is open when the exception is thrown/caught. 
>> Specifically,
>> my code is as follows.
>>
>>         try {
>>             indexReader.delete(term);
>>             indexReader.close();
>>             IndexWriter indexWriter = new IndexWriter(fsDirectory,
>>                     new JapaneseAnalyzer(), false);
>>             indexWriter.optimize();
>>             indexWriter.close();
>>         } catch (Exception e) {
>>             // IndexReader may or may not be open
>>             indexReader = IndexReader.open(path);
>>             indexReader.undelete();
>>         }
>>
>> Is the above code safe? IndexReader may already be open at the beginning
> of
>> the catch clause if the exception was thrown before closing the
> IndexReader.
>>
>>
>>
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>
>
>
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> 


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