New MapReduceTask execute methods

gistfile1.java

   /**
    * Executes this task and stores results in the provided results cache. The results can be
    * obtained once the execute method completes i.e., execute method is synchronous.
    *
    * This variant of execute method minimizes the possibility of the master JVM node exceeding
    * its allowed maximum heap, especially if objects that are results of the reduce phase have a
    * large memory footprint and/or multiple MapReduceTasks are executed concurrently on the master
    * task node.
    *
    * @param resultsCache
    *           application provided results cache
    * @throws CacheException
    *
    * @since 7.0
    */
   public void execute(Cache<KOut, VOut> resultsCache) throws CacheException {
      executeHelper(resultsCache.getName());
   }

   /**
    * Executes this task and stores results in the provided results cache. The results can be
    * obtained once the execute method completes i.e., execute method is synchronous.
    *
    * This variant of execute method minimizes the possibility of the master JVM node exceeding its
    * allowed maximum heap, especially if objects that are results of the reduce phase have a large
    * memory footprint and/or multiple MapReduceTasks are executed concurrently on the master task
    * node.
    *
    * @param resultsCache
    *           application provided results cache represented by its name
    * @throws CacheException
    *
    * @since 7.0
    */
   public void execute(String resultsCache) throws CacheException {
      if (resultsCache == null || resultsCache.isEmpty()) {
         throw new IllegalArgumentException("Results cache can not be " + resultsCache);
      }
      executeHelper(resultsCache);
   }