Chain of Responsibility - Behavioral

• Let more than one object handle a request without knowing each other
• Pass the request to chained objects until it has been handled
• Avoids attaching the sender of a request to its receiver
• Giving other objects the possibility of handling the request too
• The objects become parts of a chain and the request is sent from one object to another across the chain until one of the objects will handle it.

Where to use ?

• One request should be handled by more than one object
• Don't know which object should handle a request, probably more than one object will handle it automatically
• Reduce coupling
• Flexible in handling a request