org.apache.lucene.search
Class FilterManager.FilterCleaner

java.lang.Object
  org.apache.lucene.search.FilterManager.FilterCleaner

All Implemented Interfaces:

Runnable

Enclosing class:

FilterManager

protected class FilterManager.FilterCleaner
extends Object
implements Runnable

Keeps the cache from getting too big. If we were using Java 1.5, we could use LinkedHashMap and we would not need this thread to clean out the cache. The SortedSet sortedFilterItems is used only to sort the items from the cache, so when it's time to clean up we have the TreeSet sort the FilterItems by timestamp. Removes 1.5 * the numbers of items to make the cache smaller. For example: If cache clean size is 10, and the cache is at 15, we would remove (15 - 10) * 1.5 = 7.5 round up to 8. This way we clean the cache a bit more, and avoid having the cache cleaner having to do it frequently.

Constructor Summary

FilterManager.FilterCleaner()

Method Summary

void

run()

Methods inherited from class java.lang.Object

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

Constructor Detail

FilterManager.FilterCleaner

public FilterManager.FilterCleaner()

Method Detail

run

public void run()

Specified by:

run in interface Runnable