1 Introduction to JADE presenter: Ji-Yu Li. 2 Outline Introduction Foundation for Intelligent Physical Agents (FIPA) Java Agent Development Environment

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Introduction to JADE

presenter: Ji-Yu Li

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OutlineOutline

IntroductionFoundation for Intelligent Physical Agents (FIPA)

Java Agent Development Environment (JADE)

Running JADE PlatformInstall JDK 1.5

Install JADE Platform

Run JADE Platform

Run Agent on JADE Platform

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OutlineOutline





Run JADE Platform


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Foundation for Intelligent Physical Agents (FIPA)Foundation for Intelligent Physical Agents (FIPA)

IEEE Computer Society standards organization A body for developing and setting computer software standards for heterogeneous and interacting agents and agent-based systems. Agent managementAgent communication language (ACL)Integration agent and other computer softwarehttp://www.fipa.org/

A software agentA piece of software that acts for a user or other program in a relationship of agency

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OutlineOutline





Run JADE Platform


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JADEJADEJADE (Java Agent Development Framework)

Framework aimed at developing multi-agent systems and applications conforming to FIPA standards for intelligent agents.

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JADEJADEThe agent platform can be split among several hosts. Only one Java application(Main container) is executed on each host.

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JADEJADE

Support to the execution of multiple, parallel and concurrent agent activities via the behaviour model.

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JADE platformJADE platform

JADE is a middleware that facilitates the development of Multi Agent Peer-to-Peer applications.

Full Java

Runs on all JVM from J2EE to J2ME MIDP1.0

Downloadable from http://jade.tilab.com

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Containers and PlatformsContainers and Platforms

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Each running instance of the JADE runtime environment is called a Container as it can contain several agents.

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The set of active containers is called a Platform.

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A single special Main container must always be active in a platform and all other containers register with it as soon as they start.

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JADEJADE

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JADEJADE

Main container

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JADEJADE

AMS (Agent Management System) Provides the naming service and represents the authority in the platform.

DF (Directory Facilitator) Provides a Yellow Pages service by means of which an agent can find other agents providing the services he requires in order to achieve his goals.

RMA(Remote Management Agent)Acting as graphical console for platform management and control.

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Agent Management System (AMS)Agent Management System (AMS)

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Agent Management SystemAgent Management System

Provides the naming serviceEnsures that each agent in the platform has a unique name

Represents the authority in the platformTo create/kill agents on remote containers by requesting that to the AMS

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Directory FacilitatorDirectory Facilitator

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Directory FacilitatorDirectory Facilitator

Provides a Yellow Pages service by means of which an agent can find other agents providing the services he requires in order to achieve his goals.

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DF AgentDF Agent

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Remote Monitoring AgentRemote Monitoring Agent

Provide the GUI to control agents’ lifecycle

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Message Transport SystemMessage Transport System

Agent Communication Channel (ACC)

Agent to Agent

Agent Platform to Agent Platform

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JADEJADE

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JADEJADE

Agent identifier <nickname>@<platform_name>

nickname platform_name

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OutlineOutline





Run JADE Platform


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Install JDK 1.5Install JDK 1.5

http://java.sun.com/ Download J2SE Development Kit (JDK) 1.5

The Java Runtime Environment (JRE)

Command-line development tools, such as compilers and debuggers, that are necessary or useful for developing applets and applications

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Install JDK 1.5 -- step 1Install JDK 1.5 -- step 1

downloads

Web Site

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Select Java SE

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Download

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OutlineOutline





Run JADE Platform


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JADEJADE

http://jade.tilab.com/

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JADE PackageJADE Package

•JADE-doc•Document

•JADE-src•Source Code

•JADE-bin•Binary Code

•JADE-example•Example Code

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Download eclipseDownload eclipse

Eclipse - an open development platformEclipse is an open source community whose projects are focused on building an open development platform comprised of extensible frameworks, tools and runtimes for building, deploying and managing software across the lifecycle.

http://www.eclipse.org/downloads/

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Download eclipseDownload eclipse

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OutlineOutline





Run JADE Platform


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jade.Boot

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-gui

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Run JADE Platform


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ImplementationImplementation

1. Import jade.core.Agent Library

2. setup() 初始化 agent ，向 AMS 註冊，此時狀態為ACTIVE

3. addBehaviour() 加入 behaviours 到排程佇列，傳入的參數為一個 Behaviour class

4. action() 定義 behaviour 中的行為

5. doDelete() 結束此 agent

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import jade.core.Agent;import jade.core.behaviours.OneShotBehaviour;

public class HelloAgent extends Agent{ protected void setup() { addBehaviour(new InitBeha()); }

class InitBeha extends OneShotBehaviour { public void action() { System.out.println(“Hello!"); doDelete(); } }}

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-container -host <IP> <agent_name>:<class_name>

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End

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Introduction to Agent

presenter: Ji-Yu Li

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Outline Outline

Behaviour

Agent Communication

Example

Sniffer Agent

Example 2

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Behaviour Behaviour

The setup() method should add at least one behaviour to the agent.

Every JADE agent is compose of a single execution thread and all its tasks are modeled and can be implemented as Behaviour objects.

addBehavior(Behaviour) & removeBehaviour(Behaviour) allow to manage the ready tasks queue of an agent.

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Behaviour Behaviour

class WakerBehaviourThis abstract class implements a one-shot task that must be executed only once just after a given timeout is elapsed.

class TickerBehaviourThis abstract class implements a cyclic task that must be executed periodically.

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OneShotBehaviouragent 只會執行一次

CyclicBehaviouragent 的會以輪詢的方式來執行

import jade.core.behaviours.OneShotBehaviour

import jade.core.behaviours.CyclicBehaviour

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SimpleBehaviourSimpleBehaviour

class SimpleBehaviourclass OneShotBehaviour

This abstract class models atomic behaviours that must be executed only once and cannot be blocked. So, its done() method always returns true.

class CyclicBehaviourThis abstract class models atomic behaviours that must be executed forever. So its done() method always returns false.

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CompositeBehaviourCompositeBehaviour

class CompositeBehaviourclass SequentialBehaviour

This class is a CompositeBehaviour that executes its sub-behaviours sequentially and terminates when all sub-behaviours are done.

class ParallelBehaviourThis class is a CompositeBehaviour that executes its sub-behaviours concurrently and terminates when a particular condition on its sub-behaviours is met.

class FSMBehaviourThis class is a CompositeBehaviour that executes its children according to a Finite State Machine defined by the user.

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Outline Outline

Behaviour

Agent Communication

Example

Sniffer Agent

Example 2

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Agent CommunicationAgent Communication

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sender of the message

list of receivers

communicative intention (or “performative”)

content

content language

ontology

some fields

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Receiving Messages

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Outline Outline

Behaviour

Agent Communication

Example

Sniffer Agent

Example 2

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Example Example

寫兩支 Agent 於 JADE 上 :SenderAgent

OneShotBehaviour

用 ACLMessage 傳送字串給 ReceiverAgent

ReceiverAgentCyclicBehaviour

接收由 SenderAgent 傳送之字串並印出

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ExampleExample

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SenderSender

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ReceiverReceiver

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Exmaple Exmaple

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Outline Outline

Behaviour

Agent Communication

Example

Sniffer Agent

Example 2

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Sniffer Sniffer

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Sniffer Sniffer

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Sniffer Sniffer

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Outline Outline

Behaviour

Agent Communication

Example

Sniffer Agent

Example 2

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Example 2 Example 2

寫三支 agent

•Sender 送給 HelloAgent 字串” Hello” ， HelloAgent 會在執行畫面上印出 sender 的名稱並回傳 Hi

•接著 SenderAgent 再傳送數字給 MathAgent ， MathAgen 收到後再回傳從 1加到該數字的總和，並在SenderAgent 端執行畫面印出。

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Arguments Arguments

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SenderAgent SenderAgent

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SenderAgent SenderAgent

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SenderAgentSenderAgent

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HelloAgent HelloAgent

寫三支 agent



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HelloAgentHelloAgent

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MathAgent MathAgent

寫三支 agent



※一樣要 do sniffer 觀察這三支 agent

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MathAgentMathAgent

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Results Results

SenderAgent

HelloAgent

MathAgent

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ResultsResults

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Sniffer AgentSniffer Agent

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HomeworkHomework

寫兩支 Agent 互相溝通

(a) 輸入地點，查詢今日天氣預報

(b) 猜數字遊戲

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End

Documents

1 Introduction to JADE presenter: Ji-Yu Li. 2 Outline Introduction Foundation for Intelligent Physical Agents (FIPA) Java Agent Development Environment