Uploaded byNguyễn Ngân
blackboard architecture
This document describes the blackboard architecture style. It discusses the basic idea of blackboard architecture, which involves decomposing a system into a blackboard to store data and hypotheses, and knowledge sources that contain domain-specific knowledge. Knowledge sources interact only with the blackboard to collaboratively solve problems. The document also provides examples of applying blackboard architecture to a movie website application and outlines benefits like scalability and concurrency, as well as drawbacks like tight dependencies and difficulty debugging.
In this document
Powered by AI
Introduction to the Blackboard Architecture by Group 5, outlining its components, benefits, and drawbacks.
Details on the blackboard system, including the basic idea, reasoning methods, and architecture structure.
Examples of blackboard architecture applications, particularly in web development for movie chain management.
Highlights key benefits such as scalability, concurrency, and reusability of knowledge source agents.
Discusses challenges including dependencies, termination decisions, synchronization issues, and debugging difficulties.
Final slide thanking the audience for their participation.
More Related Content
Similar to blackboard architecture
blackboard architecture
- 1. Blackboard Architecture Group5_ SE0304: 1.Nguyễn Thúy Ngân 2. Nguyễn Xuân Hiếu 3. Đỗ Tiến Hưng Sortware Srchitecture Design
- 2. Table of contents •Introduction Blackboard Architecture Style • Applicable • Benefit of Blackboard architecture • Drawbacks of Blackboard architecture
- 3. 1. Introduction toBlackboard Architecture • Basic idea • Forward Reasoning or Backward Reasoning • Architecture • Class diagram • Sequence diagram
- 4. 1.1 Basic idea •The idea of blackboard architecture is similar to the classroom blackboard setting used in solving problems. • It is a data-directed and a partially data-driven architecture. • The whole system is decomposed into two major partitions: – blackboard, used to store data (hypotheses and facts) – knowledge sources, where the domain-specific knowledge is stored. • There may be a third partition called the controller , used to initiate the blackboard and knowledge sources, takes a bootstrap role and overall supervision control.
- 5. 1.1 Basic idea •Specific knowledge sources collaborate together to solve a complex problem • Knowledge sources don’t need to interact with each other, only need to interact and respond to the blackboard sub-system. • Each source only works on a specific aspect of the problem
- 6. 1.2 Forward Reasoning &Backward Reasoning • The forward reasoning starts with the initial state of data and proceeds towards a goal. • If the goal is not given, the reasoning will come to a point where no more new facts can be derived that indicated that is the best result we can get. • The backward reasoning works in the opposite direction than the forward reasoning.
- 7.
- 8.
- 9.
- 10. 2. Applicable • Weatherbroadcast systems. • Pattern recognition • Authentication in information security. • Etc.
- 11. 2. Applicable _A WebApplication_ • the development of a web application in the domain of movie chains
- 12. 2. Applicable _A WebApplication_
- 13. 2. Applicable _A WebApplication_ • Structure in Blackboard Architecture has three partition Blackboard Knowledge sources Controller
- 14. 2. Applicable _A WebApplication_
- 15. 2. Applicable _A WebApplication_ Knowledge sources • Iknowledgesource defines an interface for all the KS. • Movie Information (InformacionpeliculasKS) • Anonymous reservations (ReservacionAnonimaKS • Member reservations (ReservacionMiembrosKS) • Show Movie Guide (PresentarFuncionesKS) • Close reservations (CierreReservacionesKS) • Close functions (CierreFuncionesKS)
- 16. 2. Applicable _A WebApplication_ Blackboard • The Blackboard holds all the data concerning the weekly and daily movie guide; it also provides special methods for supporting the updating process carried out by knowledge sources. It is a Singleton, therefore only one instance of the movie guide exists.
- 17. 2. Applicable _A WebApplication_ Control • The control extends the Thread java class and runs a separate thread monitoring constantly the Blackboard’s state. It contains a list of registered knowledge sources for their automatic activa-tion (if that is the case). In addition, it allows the communication among the jsp pages and the manual knowledge sources.
- 18. 2. Applicable _A WebApplication_
- 19. 3. Benefit ofBlackboard architecture • Scalability: easy to add new knowledge source or update existing knowledge source. • Concurrency: all knowledge sources can work in parallel since they are very independent of each other. • Supports experimentation for hypotheses. • Reusability of knowledge source agents.
- 20. 4. Drawbacks ofBlackboard architecture • Tight dependency between the blackboard and knowledge source • Difficult to make a decision when to terminate reasoning • Synchronization of multiple agents is an issue. • Debugging and testing of the system is a challenge.
- 21.