[ http://issues.apache.org/jira/browse/VELOCITY-434?page=all ]
Serge Knystautas updated VELOCITY-434:
--------------------------------------
Attachment: CommonsParserPool.java
The second CommonsParserPool defaults to 0 (instead of 20) parsers in the pool,
which gives reuse of parsers in most cases which greatly reducing the amount of
heap space use. After more testing, just seems like a better default.
> Commons pool implementation of the parser pool
> ----------------------------------------------
>
> Key: VELOCITY-434
> URL: http://issues.apache.org/jira/browse/VELOCITY-434
> Project: Velocity
> Type: Improvement
> Components: Source
> Reporter: Serge Knystautas
> Priority: Minor
> Attachments: CommonsParserPool.java, CommonsParserPool.java,
> CommonsParserPoolFactory.java
>
> Now that with [Velocity-433] we can swap out the parser pool, here is a
> parser pool that uses commons-pool (http://jakarta.apache.org/commons/pool/).
> It is very primitive configuration and uses the same configuration name
> (parser.pool.size) for maximum number of elements in the pool. It is also
> configured to grow when the maximum number is exhausted, which means that it
> scales the same way as the original parser, while actually providing some
> better pool support.
> One of the nicest parts about this is that you can set your maximum instances
> to 0 and still get great performance. The first time you need a parser, it
> will still add one even though the max is reached (since grow when exhausted
> is set). Assuming the second time you need a parser is within a few seconds,
> that first instance is still there.
> Here is some sample code of how to use it your app.
> Properties configuration = new Properties();
> configuration.put("parser.pool.class",
> "com.lokitech.util.pool.CommonsParserPool");
> configuration.put("parser.pool.size", "0");
> Velocity.init(configuration);
> Since Velocity does not have an existing dependency on commons pool, I'm not
> sure this code will get packaged into the main distribution. This code is
> licensed using ASL 2.0, so please reuse however you want as long as
> attribution is kept per the license.
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see:
http://www.atlassian.com/software/jira
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
