| Command | Executor's Command are dedicated to contain purely business logic that should be executed. | 
| CommandCallback | CommandCallback represents logic that shall be executed after command invocation. | 
| ErrorInfo | Represents Error information of the executor service data model. | 
| Executor | Core logic of executor is encapsulated by this interface. | 
| ExecutorAdminService | Simple administration api for executor service. | 
| ExecutorQueryService | Executor query interface that provides runtime access to data. | 
| ExecutorService | Top level facade that aggregates operations defined in:
 
  ExecutorExecutorQueryServiceExecutorAdminService | 
| ExecutorStoreService |  | 
| Reoccurring | Marks given executor command it is reoccurring and shall be rescheduled after completion of single instance. | 
| RequestInfo | Represents request information for the executor service. |