参考链接:
https://cs.uwaterloo.ca/~m2nagapp/courses/CS446/1181/Arch_Design_Activity/Blackboard.pdf
http://users.encs.concordia.ca/~gregb/home/PDF/soen6461_blackboard_arch.pdf
参考链接:
https://cs.uwaterloo.ca/~m2nagapp/courses/CS446/1181/Arch_Design_Activity/Blackboard.pdf
http://users.encs.concordia.ca/~gregb/home/PDF/soen6461_blackboard_arch.pdf