DynamoDbAtomicCounter (AWS Java SDK :: DynamoDB :: Enhanced Client 2.24.12 API)

```
@Target(METHOD)
@Retention(RUNTIME)
public @interface DynamoDbAtomicCounter
```
Used to explicitly designate an attribute to be an auto-generated counter updated unconditionally in DynamoDB. By default, the counter will start on 0 and increment with 1 for each subsequent calls to updateItem. By supplying a negative integer delta value, the attribute works as a decreasing counter.

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element	Description
`long`	`delta`	The value to increment (positive) or decrement (negative) the counter with for each update.
`long`	`startValue`	The starting value of the counter.

- Element Detail
  - delta
```
long delta
```
    The value to increment (positive) or decrement (negative) the counter with for each update.
    
    Default:
    
    1L
- - startValue
```
long startValue
```
    The starting value of the counter.
    
    Default:
    
    0L