[GitHub] curator pull request: CURATOR-144: TreeCache.Builder to configure ...

[cammckenzie <gi...@git.apache.org>]

Github user cammckenzie commented on a diff in the pull request:

    https://github.com/apache/curator/pull/41#discussion_r16939659
  
    --- Diff: curator-recipes/src/main/java/org/apache/curator/framework/recipes/cache/TreeCache.java ---
    @@ -580,13 +670,33 @@ public Void apply(TreeCacheListener listener)
         }
     
         /**
    -     * Default behavior is just to log the exception
    -     *
    -     * @param e the exception
    +     * Send an exception to any listeners, or else log the error if there are none.
          */
    -    protected void handleException(Throwable e)
    +    private void handleException(final Throwable e)
         {
    -        LOG.error("", e);
    +        if ( errorListeners.size() == 0 )
    +        {
    +            LOG.error("", e);
    +        }
    +        else
    +        {
    +            errorListeners.forEach(new Function<UnhandledErrorListener, Void>()
    +            {
    +                @Override
    +                public Void apply(UnhandledErrorListener listener)
    +                {
    +                    try
    +                    {
    +                        listener.unhandledError("", e);
    +                    }
    +                    catch ( Exception e )
    +                    {
    +                        LOG.error("Exception handling exception", e);
    +                    }
    +                    return null;
    +                }
    +            });
    +        }
    --- End diff --
    
    I don't think that funneling unhandled errors through the CuratorFramework's listeners would work super well. Because there's not going to any real way of identifying where they came from, beyond logging them, I'm not sure what else you could do with them.
    
    Maybe attaching UnhnadlerErrorListener's to each recipe is the way to go.


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