Github user aandis commented on a diff in the pull request:
    --- Diff: storm-core/src/jvm/org/apache/storm/state/ ---
    @@ -45,4 +47,9 @@
          * @return the value or defaultValue if no mapping is found
         V get(K key, V defaultValue);
    +    /**
    +     * @return all key value mappings as an unmodifiable map.
    +     */
    +    Map<K, V> getAll();
    --- End diff --
    > the issue with map is that you need to load the entire state into the map 
before you can return 
    true. It makes sense for the interface to return an iterator. But I am not 
sure of the implementation for say, `RedisKeyValueState`. Wouldn't you _need_ 
to load the entire state and preprocess them since there's 

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