[ https://issues.apache.org/jira/browse/LUCENE-1149?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael McCandless reopened LUCENE-1149: ---------------------------------------- Sorry, you're right this issue isn't really a dup (I've reopened it). I was just saying that Lucene's IW APIs are already transactional so one should be able to build a transactions layer on top. Ie, you should not have to make a new index for each transaction. We would still need a layer that mates this up to the XA transactions API (I think?). Does anyone have a patch for this? > add XA transaction support > -------------------------- > > Key: LUCENE-1149 > URL: https://issues.apache.org/jira/browse/LUCENE-1149 > Project: Lucene - Java > Issue Type: New Feature > Components: Index > Reporter: robert engels > > Need to add XA transaction support to Lucene. > Without XA support, it is difficult to keep disparate resources (e.g. > database) in sync with the Lucene index. > A review of the XA support added to Hibernate might be a good start (although > Hibernate almost always uses a XA capable backing store database). > It would be ideal to have a combined IndexReaderWriter instance, then create > a XAIndexReaderWriter which wraps it. > The implementation might be as simple as a XA log file which lists the XA > transaction id, and the segments XXX number(s), since Lucene already allows > you to rollback to a previous version (??? for sure, or does it only allow > you to abort the current commit). > If operating under a XA transaction, the no explicit commits or rollbacks > should be allowed on the instance. > The index would be committed during XA prepare(), and then if needed > rolledback when requested. The XA commit() would be a no-op. > There is a lot more to this but this should get the ball rolling. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org