Bài giảng Tác tử - Công nghệ phần mềm dựa tác tử: Thư viện lập trình Agent cung cấp đến người học các nội dung liên quan đến Sofware Agent và Midleware. Thông qua bài học này, người học có thể biết về Agent Standards, FIPA Overview, FIPA Encodings and package,. . | Bài 9 Thư viện lập trình Agent 1. 2. Sofware Agent Midleware Middleware Distributed computing Linking large numbers of different components to perform joint tasks Providing support services To enable reuse of code To abstract away from implementation level details To provide uniform access to functions Middleware defines (part of ) the environment. Services available: communication, security, etc. Agents live in a software environment – middleware plays a large part (c) SE/FIT/HUT 2002 (c) SE/FIT/HUT 2002 Fat Client – Thin Middleware Agents have many general purpose components Little is left to the environment A Advantages More control over behaviour Good sense of the environment Agent is more “independent” Thin Client Fat Middleware Little abstraction Little interoperability (many different implementations) (Potentially) Less O efficient due to multiple B specialisation. (c) SE/FIT/HUT 2002 Agent Middleware Often quite “fat” Reduction in code that needs to be written Greater code reuse Stronger Interoperability (more predictable environment) Lightweight agents Agents are only behaviour code Eveything else is a “service” in the middleware Disadvantages A Disadvantages O Advantages B LDAP Transport SMTP HTTP Less control of behaviour No low level environment sensors (Potentially) Less efficient due to generalisation (c) SE/FIT/HUT 2002 Standards in Middleware Corba Using agents as an abstraction Focus on high level behavioral details Many systems are prototypes so: • Efficiency is less of a concern • The domain is restricted (less worried about general survival) Often Incorporate Naming services Message Transport Communication mechanisms and sometimes even coordination mechanisms such as auction interfaces Agent architectures including reasoning systems (c) SE/FIT/HUT 2002 Interoperability - objects access each other Services in the environment – Naming service, lookup services etc. POA Interfaces – plug and play middleware .
