| Touch(WritePolicy, Key) | Reset record's time to expiration using the policy's expiration. Fail if the record does not exist. |
| Touch(WritePolicy, WriteListener, Key) | Asynchronously reset record's time to expiration using the policy's expiration. Schedule the touch command with a channel selector and return. Another thread will process the command and send the results to the listener. Fail if the record does not exist. |
| Touch(WritePolicy, CancellationToken, Key) | Asynchronously reset record's time to expiration using the policy's expiration. Create listener, call asynchronous touch and return task monitor. Fail if the record does not exist. |