## Uses of Interface
org.apache.cayenne.access.OperationHints

- Packages that use OperationHints
  Package | Description
  --- | ---
  org.apache.cayenne.access | Contains classes that make up Cayenne ORM stack.
  org.apache.cayenne.access.util |

- - ### Uses of OperationHints in org.apache.cayenne.access

    Subinterfaces of OperationHints in org.apache.cayenne.access
    Modifier and Type | Interface | Description
    --- | --- | ---
    `interface` | `OperationObserver` | Defines a set of callback methods that allow `QueryEngine` to pass back query results and notify caller about exceptions.

  - ### Uses of OperationHints in org.apache.cayenne.access.util

    Classes in org.apache.cayenne.access.util that implement OperationHints
    Modifier and Type | Class | Description
    --- | --- | ---
    `class` | `DefaultOperationObserver` | Simple implementation of OperationObserver interface.
    `class` | `DoNothingOperationObserver` | A very simple observer that does nothing with provided data, and rethrows any reported exceptions.
    `class` | `IteratedSelectObserver` | OperationObserver that is used to track the execution of SelectQueries with results returned as ResultIterator.