Aggregator (Pivotal GemFire 9.8.10)

```
public interface Aggregator
```
Behavior of a user-defined aggregator. Aggregates values and returns a result. In addition to the methods in the interface, implementing classes must have a 0-arg public constructor.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`accumulate(Object value)` Accumulate the next scalar value
`void`	`init()` Initialize the Aggregator
`Object`	`terminate()`

Interface Aggregator