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From Nicolas Lalevée (JIRA) <j...@apache.org>
Subject [jira] Created: (LUCENE-776) Use WeakHashMap instead of Hashtable in FSDirectory
Date Sat, 13 Jan 2007 17:03:27 GMT
Use WeakHashMap instead of Hashtable in FSDirectory
---------------------------------------------------

                 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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