Patt#28. "Sender - Pass Through - Receiver" Pattern //
interaction patterns

Typical object interactions
- sender.invokeReceiver --> passThrough.invokeReceiver
--> receiver.executeRequest
Examples
- saleLineItem.qualForDiscount --> sale.qualForDiscount
--> customer. qualForDiscount
Combinations
- Superimpose upon participant - transaction - transaction
line item.
- Superimpose upon any three (or more) interacting pattern
players.
Notes
- Sender is loosely coupled to the other two.
Interaction patterns
Patterns for building object
models