com.bigdata.service
Class IndexCache

java.lang.Object
  com.bigdata.service.AbstractIndexCache<IScaleOutClientIndex>
      com.bigdata.service.IndexCache

Type Parameters:

T -

public class IndexCache
extends AbstractIndexCache<IScaleOutClientIndex>

Concrete implementation for IClientIndex views.

Version:

$Id: IndexCache.java 2265 2009-10-26 12:51:06Z thompsonbry $

Author:

Bryan Thompson

Field Summary

Fields inherited from class com.bigdata.service.AbstractIndexCache

INFO, log

Constructor Summary

IndexCache(AbstractScaleOutFederation fed, int capacity, long timeout)

Method Summary

protected void	dropIndexFromCache(String name) Drop the ITx.UNISOLATED and ITx.READ_COMMITTED entries for the named index from the cache.
protected ClientIndexView	newView(String name, long timestamp) Method is invoked on a cache miss and returns a view of the described index.

Methods inherited from class com.bigdata.service.AbstractIndexCache

getIndex, shutdown

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IndexCache

public IndexCache(AbstractScaleOutFederation fed,
                  int capacity,
                  long timeout)

Method Detail

newView

protected ClientIndexView newView(String name,
                                  long timestamp)

Description copied from class: AbstractIndexCache

Method is invoked on a cache miss and returns a view of the described index.

Specified by:

newView in class AbstractIndexCache<IScaleOutClientIndex>

Returns:

The index view -or- null if the described index does not exist.

dropIndexFromCache

protected void dropIndexFromCache(String name)

Description copied from class: AbstractIndexCache

Drop the ITx.UNISOLATED and ITx.READ_COMMITTED entries for the named index from the cache.

Historical and transactional reads are still allowed, but we remove the read-committed or unisolated views from the cache once the index has been dropped. If a client wants them, it needs to re-request. If they have been re-registered on the metadata service then they will become available again.

Note: Operations against unisolated or read-committed indices will throw exceptions if they execute after the index was dropped.

Overrides:

dropIndexFromCache in class AbstractIndexCache<IScaleOutClientIndex>