ITraversalListener

Type Parameters:

A - the least common parent type of all actions that are to be traversed

E - the type of the entity whose behaviour is simulated by the traversal

All Known Implementing Classes:

AbstractExternalCallListener, DebugSeffTraversalListener, DebugUsageTraversalListener, SimSlowdown
```
public interface ITraversalListener<A extends org.palladiosimulator.pcm.core.entity.Entity,E extends EventSimEntity>
```
A traversal listener observes subclasses of BehaviourInterpreter for their traversal progress. Whenever an action is about to be traversed or has been traversed completely, the BehaviourTraversal notifies its observers by calling either the before or the after method on the listeners.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`after(A action, E entity)`	Called by the `BehaviourInterpreter` when the specified action has been traversed completely by the given entity.
`void`	`before(A action, E entity)`	Called by the `BehaviourInterpreter` when the specified action is about to be traversed by the given entity.

- Method Detail
  - before
```
void before(A action,
            E entity)
```
    Called by the BehaviourInterpreter when the specified action is about to be traversed by the given entity.
    
    Parameters:
    
    action - the action that is traversed soon
    
    entity - the entity that traverses the action
  - after
```
void after(A action,
           E entity)
```
    Called by the BehaviourInterpreter when the specified action has been traversed completely by the given entity.
    
    Parameters:
    
    action - the action that has been traversed
    
    entity - the entity that has traversed the action