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class HashMetaData {
  private Map<WeakReference<SSLSocket>, InetAddress> m = 
      Collections.synchronizedMap(
        new HashMap<WeakReference<SSLSocket>, InetAddress>());
  ReferenceQueue queue = new ReferenceQueue();
  
  public void storeTempConnection(SSLSocket sock, InetAddress ip) {
    WeakReference<SSLSocket> wr = new WeakReference<SSLSocket>(sock, queue);

    // Poll for dead entries before adding more 
    while ((wr = (WeakReference) queue.poll()) != null) {
      // Removes the WeakReference object and the value (not the referent) 
      m.remove(wr); 
    }  
    m.put(wr, ip);
  }

  public void removeTempConnection(SSLSocket sock) {
    m.remove(sock);  
  }
}

class HashMetaData {
  private Map<SoftReference<SSLSocket>, InetAddress> m = 
        Collections.synchronizedMap(
        new HashMap<SoftReference<SSLSocket>, InetAddress>());
  ReferenceQueue queue = new ReferenceQueue();

  public void storeTempConnection(SSLSocket sock, InetAddress ip) {
    SoftReference<SSLSocket> sr = new SoftReference<SSLSocket>(sock, queue);
    while ((sr = (SoftReference) queue.poll()) != null) {
      // Removes the WeakReference object and the value (not the referent)
      m.remove(sr); 
    }  
    m.put(sr, ip);
  }

  public void removeTempConnection(SSLSocket sock) {
    m.remove(sock);  
  }	
}