Use WeakHashMap instead of Hashtable in FSDirectory
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Key: LUCENE-776
URL: https://issues.apache.org/jira/browse/LUCENE-776
Project: Lucene - Java
Issue Type: Improvement
Affects Versions: 2.0.0
Reporter: Nicolas Lalevée
Priority: Trivial
I was just reading the FSDirectory java code, then I found this :
/** This cache of directories ensures that there is a unique Directory
* instance per path, so that synchronization on the Directory can be used to
* synchronize access between readers and writers.
*
* This should be a WeakHashMap, so that entries can be GC'd, but that would
* require Java 1.2. Instead we use refcounts...
*/
private static final Hashtable DIRECTORIES = new Hashtable();
Since Lucene is now requiring at least 1.2 (for ThreadLocal for instance, which
is using BTW some WeakHashMap), maybe it is time to change ?
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