[infinispan-issues] [JBoss JIRA] Created: (ISPN-719) BoundedConcurrentHashMap.EvictionListener should have a bulk entry listener method.

[Trustin Lee (JIRA)]

BoundedConcurrentHashMap.EvictionListener should have a bulk entry listener method.
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                 Key: ISPN-719
                 URL: https://jira.jboss.org/browse/ISPN-719
             Project: Infinispan
          Issue Type: Task
          Components: Core API
    Affects Versions: 4.1.0.Final
            Reporter: Trustin Lee
            Assignee: Manik Surtani
             Fix For: 4.2.0.BETA1


BoundedConcurrentHashMap.EvictionListener should have a bulk entry listener so that CacheStores can optimize passivation behavior.  Current BoundedConcurrentHashMap notifies EvictionListener for every evicted entry.  However, as you see from BoundedConcurrentHashMap.Segment.attemptEviction(..), eviction often happens in bulk. If these evicted entries are supposed to be passivated, it is often beneficial to begin a transaction because it often takes much less time to call commit() less often.  If N entries are evicted:

without bulk eviction:

    store.store(e1); -- each store implied a commit()
    store.store(..);
    store.store(eN);

with bulk eviction:

    store.begin(mods(e1, ..., eN), tx, true);

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