Exemplo n.º 1
0
  boolean closeAndRemoveResourcesInSet(Set s, Method closeMethod) {
    boolean okay = true;

    Set temp;
    synchronized (s) {
      temp = new HashSet(s);
    }

    for (Iterator ii = temp.iterator(); ii.hasNext(); ) {
      Object rsrc = ii.next();
      try {
        closeMethod.invoke(rsrc, CLOSE_ARGS);
      } catch (Exception e) {
        Throwable t = e;
        if (t instanceof InvocationTargetException)
          t = ((InvocationTargetException) e).getTargetException();
        logger.log(MLevel.WARNING, "An exception occurred while cleaning up a resource.", t);
        // t.printStackTrace();
        okay = false;
      } finally {
        s.remove(rsrc);
      }
    }

    // We had to abandon the idea of simply iterating over s directly, because
    // our resource close methods sometimes try to remove the resource from
    // its parent Set. This is important (when the user closes the resources
    // directly), but leads to ConcurrenModificationExceptions while we are
    // iterating over the Set to close. So, now we iterate over a copy, but remove
    // from the original Set. Since removal is idempotent, it don't matter if
    // the close method already provoked a remove. Sucks that we have to copy
    // the set though.
    //
    // Original (direct iteration) version:
    //
    //  	synchronized (s)
    //  	    {
    //  		for (Iterator ii = s.iterator(); ii.hasNext(); )
    //  		    {
    //  			Object rsrc = ii.next();
    //  			try
    //  			    { closeMethod.invoke(rsrc, CLOSE_ARGS); }
    //  			catch (Exception e)
    //  			    {
    //  				Throwable t = e;
    //  				if (t instanceof InvocationTargetException)
    //  				    t = ((InvocationTargetException) e).getTargetException();
    //  				t.printStackTrace();
    //  				okay = false;
    //  			    }
    //  			finally
    //  			    { ii.remove(); }
    //  		    }
    //  	    }

    return okay;
  }
Exemplo n.º 2
0
 boolean closeAndRemoveResultSets(Set rsSet) {
   boolean okay = true;
   synchronized (rsSet) {
     for (Iterator ii = rsSet.iterator(); ii.hasNext(); ) {
       ResultSet rs = (ResultSet) ii.next();
       try {
         rs.close();
       } catch (SQLException e) {
         if (Debug.DEBUG)
           logger.log(MLevel.WARNING, "An exception occurred while cleaning up a ResultSet.", e);
         // e.printStackTrace();
         okay = false;
       } finally {
         ii.remove();
       }
     }
   }
   return okay;
 }