SingletonService (SPI definition 4.0.0 API)

```
public interface SingletonService<T>
```
Responsible for providing singleton instances for OWB runtime. Provider can implement their own logic to provide singleton instances.

Version:

$Rev$ $Date$

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`clear(Object key)`	Any clean activity.
`T`	`get(Object key)`	Get instance for given key and class name.

- Method Detail
  - get
```
T get(Object key)
```
    Get instance for given key and class name.
    
    Parameters:
    
    key - instance key
    
    Returns:
    
    instance
  - clear
```
void clear(Object key)
```
    Any clean activity.
    
    Parameters:
    
    key - instance key