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From "Shai Erera (JIRA)" <>
Subject [jira] Updated: (LUCENE-1720) TimeLimitedIndexReader and associated utility class
Date Mon, 15 Feb 2010 16:53:27 GMT


Shai Erera updated LUCENE-1720:

    Attachment: LUCENE-1720.patch

Added patch contains, above all previous things:
* Changes to FitlerIndexReader to better support extensions.
* Changes in TimeLimitingIndexReader based on the previous bullet.
* Changes to TestIndexReader to better support extensions.
* TestFilterIndexReader now extends TestIndexReader.
* TestTimeLimitingIndexReader was added few test methods.

Although some of the changes can be viewed as belonging to a separate issue, I think they
are not very big and fit nicely here. It allows testing the new TimeLimitingIndexReader which
is important.

Mark, the only thing that remains is to convert TimeLimitingIndexReaderBenchmark to a benchmark
algorithm/task. Would you mind taking a stab at this? If not, I'll try to get to it later
this week (perhaps in a day or two).

> TimeLimitedIndexReader and associated utility class
> ---------------------------------------------------
>                 Key: LUCENE-1720
>                 URL:
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Index
>            Reporter: Mark Harwood
>            Assignee: Mark Harwood
>            Priority: Minor
>         Attachments:,,,, LUCENE-1720.patch, Lucene-1720.patch, Lucene-1720.patch, LUCENE-1720.patch,,,,
> An alternative to TimeLimitedCollector that has the following advantages:
> 1) Any reader activity can be time-limited rather than just single searches e.g. the
document retrieve phase.
> 2) Times out faster (i.e. runaway queries such as fuzzies detected quickly before last
"collect" stage of query processing)
> Uses new utility timeout class that is independent of IndexReader.
> Initial contribution includes a performance test class but not had time as yet to work
up a formal Junit test.
> TimeLimitedIndexReader is coded as JDK1.5 but can easily be undone.

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