1. The YinYang System

2. Manager

3. Register/Deregister other Managers Register/Deregister Domains Register/Deregister Active Agents Handle an Agent Service Management the communication between Domains Implement Interface Plug

4. Domain

5. Launch an active agent (local or remote) Run an agent (local or remote) Kill an active agent Management the communication between active agents Register its agents, Get agent information, Search agents

6. Domain Administration

7. Agents Status –MOBILE –STATIC –DOWNLOAD –PRIVATE Manager and Domain are Jini Services, but Agents are not. Build an agent by extending the abstract class Agent.

8. Agents Agent can have an ”AgentFrame” (GUI) Agent can use ”inbox ” to store messages Agent can build a KQML Message Agent can readMessage, can getMessage and handle it. Agents need to implement the method AgentServiceResult perform(Object par)

9. HelloAgent public class HelloAgent extends Agent implements Serializable {..} public HelloAgent() { super(Agent.MOBILE); } public AgentServiceResult perform(Object par) { AgentServiceResult res = new AgentServiceResult(); String str = doWork(par); res.setResult(str); return res; }

10. JavaMail Packages: mail.jar, activation.jar Send a mail –Make a Session –Make a MimeMessage msg –Send the message: Transport.send(msg)

11. Read a mail Make a Session Get the store and establish the connection Open the folder Get all message in the folder Read a specified message.