[hibernate-issues] [Hibernate-JIRA] Created: (HSEARCH-220) introduce session.flushToIndexes API and deprecate batch_size

[Emmanuel Bernard (JIRA)]

introduce session.flushToIndexes API and deprecate batch_size
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                 Key: HSEARCH-220
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-220
             Project: Hibernate Search
          Issue Type: New Feature
          Components: engine
            Reporter: Emmanuel Bernard
             Fix For: 3.1.0


hibernate.search.worker.batch_size has many drawbacks
 - the value is not accessible programatically hence error prone
 - it applies to any operations regardless of mass indexing
 - it is used 99% of the time in close conjunction with a % and session.clear()
 - the side effect is quite big as the index is "transactionally" committed

To replace it, I introduced 
session.flushToIndexes();
this method manually triggers changes in queue. It does not trigger an hibernate core flush().

This seems more reasonable and will make the code safer.

WDYT?

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