Message Passing¶
Components exchange explicit messages instead of changing the same state.
flowchart LR
J[Junior: send messages] --> M[Middle: define delivery] --> S[Senior: handle failure] --> P[Professional: govern the protocol]
flowchart LR
Producer --> Queue[(Mailbox or broker)] --> Consumer
Consumer --> State[(Owned state)]
| Level | Guide | You are done when |
|---|---|---|
| Junior | Start | You can explain ownership transfer. |
| Middle | Apply | You can choose delivery and ordering rules. |
| Senior | Operate | You can recover from duplicates and overload. |
| Professional | Design | You can evolve and operate a message protocol. |
Practice rule: Make message identity, ownership, capacity, and failure behavior explicit.