
     * Executor used to synchronize data access in this cache manager.  
     * It has to be the same executor that is used by the data generators in 
     * order to guarantee data consistency.

     * Executor used to synchronize data access in this cache manager.  
     * It has to be the same executor that is used by the data generators in 
     * order to guarantee data consistency. | DataGeneratorCacheManager.java