Hey all, I work for Terracotta and I'm going to work on building some pre-packaged Terracotta integration for Joda Time. It's a great library and one we'd like to support out of the box. I'm still coming up to speed on the issues on this thread so bear with me.
>From Johannes's last post on the subject, he said: " Now there exist three approaches to solve that issue: - Don't compare objects using ==. I know that this is not perfect, but for me it was a very simple solution... But ok, I think that is not the way to go. - Share the static fields: I tried this successfully. But of course the performance is very, very poor. Every time a static field of DateTimeFieldType is accessed, that field is locked in the hole cluster. So obviously this is not a possible solution. - Reinitializing the date time objects: It is possible to call methods or execute bean shell code, when an object is transferred to another VM." I think this is a good place to start. I'll take these by #: 1) Terracotta does track object identity so #1 should not be a problem. I agree with Stephen that the lib shouldn't need to change. The whole point of Terracotta is to make things like this work. For other clustering technologies, they largely rely on serialization so they're likely fine assuming JT objects serialize/deserialize correctly, which I'll bllindly assume. 2) This is one possible approach and may be the easiest if not fastest solution. I noticed in your prior locking however that you were using write locks for getters. I haven't looked at the source yet. It may be that this is necessary due to some lazy init or something but generally, read locks will improve performance quite a bit there. 3) I think this is likely the best approach. 4) I'll add a 4th approach which is to doing some byte code modification on these classes to alter their behavior slightly in the cluster. I have no idea yet if that's necessary. Generally, we try to avoid that as it makes the Terracotta integration more sensitive to version and code changes (plus it's just more work). :) I have the sample app from the Terracotta forum too so I'll start with that. I'll let you know what I come up with! Feel free to email me at this address or amiller#terracottatech.com directly too. Alex Miller ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Joda-interest mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/joda-interest
