CompositionActivity (SIS-IN Composition Activity Provider Extensions Resource Adaptor Type 3.0)

```
public interface CompositionActivity
```
Activity type for the SIS Composition Activity Provider Resource Adaptor Type.
Composition Activities are used to share state between services that may be attached to different virtual dialogs related by a common underlying network dialog. The Composition Activity has a lifecycle managed by the SIS and will end when the network dialog ends.
The SIS uses the same SLEE activity object to represent the Composition Activity, Inteceptor Activity, and Service Composition Selection Activity for a given call. Therefore it is possible for SIS components and SLEE applications that use these activities to share state related to the call if required.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  ScriptVariable getVariable(String name)
  Get a script variable.

- Method Detail
  - getVariable
```
ScriptVariable getVariable(String name)
                    throws NullPointerException,
                           IllegalArgumentException
```
    Get a script variable.
    
    Parameters:
    
    name - the name of the variable.
    
    Returns:
    
    a descriptor for the variable.
    
    Throws:
    
    NullPointerException - if name is null.
    
    IllegalArgumentException - if the variable name is invalid or unknown. This exception is not thrown if the name identifies a user-defined variable, since any user-defined variable name is valid.