OperationObserver (Terracotta Statistics 2.1 API)

Type Parameters:

T - Enum type representing the possible operations 'results'

All Known Subinterfaces:

OperationStatistic<T>

All Known Implementing Classes:

AbstractOperationStatistic, MappedOperationStatistic, StatisticMapper, ZeroOperationStatistic
```
public interface OperationObserver<T extends Enum<T>>
```
Operation observers track the occurrence of processes which take a finite time and can potential terminate in different ways.
Operations must have an associated enum type that represents their possible outcomes. An example of such an enum type would be:
```
 enum PlaneFlight {
   LAND, CRASH;
 }
 
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`begin()`	Called immediately prior to the operation beginning.
`void`	`end(T result)`	Called immediately after the operation completes with no interesting parameters, and with the same thread the called {`begin()`} before.

- Method Detail
  - begin
```
void begin()
```
    Called immediately prior to the operation beginning.
  - end
```
void end(T result)
```
    Called immediately after the operation completes with no interesting parameters, and with the same thread the called {begin()} before.
    
    Parameters:
    
    result - the operation result