Lecture
This lecture covers the concept of actor composition in actor systems, where actors are composed on a protocol level to translate, forward requests and replies, split up requests, and aggregate replies. It also discusses fundamental patterns like the Customer Pattern, Interceptors, the Ask Pattern, Result Aggregation, Risk Delegation, and the Example of File Writer. Strategies such as creating subordinates for dangerous tasks, applying lifecycle monitoring, and ephemeral actors are explored. The lecture also touches on the Façade pattern for translation, validation, rate limitation, and access control.