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JADE. J ava A gent De velopment Framework An Overview. Introduction - Basic. JADE – software framework to develop agent-based applications Complies with FIPA specifications for interoperable intelligent multi-agent systems.

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JADE

Java Agent Development Framework

An Overview


Introduction - Basic

  • JADE – software framework to develop agent-based applications

  • Complies with FIPA specifications for interoperable intelligent multi-agent systems.

  • JADE is a “middleware” that enables faster time-to-market for developing multi-agent distributed applications.

  • It is Open Source distributed under LGPL license.

  • Fully developed in Java by TILAB (Italy).


Introduction - Features

  • Provides Agent life cycle management.

  • Peer-to-Peer communication.

  • White pages and yellow pages services.

  • Provides a set of graphical tools that supports the debugging, management and monitoring phases.

  • Support for agent code and execution state migration.


JADE Architecture

  • A JADE-based application is composed of a collection of active components called “Agents”.

  • Each agent is a peer and has a unique name.

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

  • Each agent lives in a “Container”.

  • The set of active containers is called a Platform.

  • The Platform provides a homogeneous layer that hides to agents the complexity and the diversity of the underlying tires (h/w, OS)


  • One container plays the role of a “Main Container” (where AMS, DF live) to which all other containers must register as soon as they start.

  • The main container differs from normal containers as it holds two special agents (automatically started when the main container is launched).

  • Two Special Agents:

    • The AMS (Agent Management System) that provides the naming service and represents the authority in the platform.

    • The DF (Directory Facilitator) that 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.


Internal architecture of the JADE run-time


Fig. JADE RMA Agent


Programmers Point of View

  • JADE provides a library of classes that programmers have to/can use to develop their agents.

  • The Agent Class

    • for creating a JADE agent

    • setup(), getAID(), doDelete(), takeDown()

  • The Behaviour Class

    • for carrying out the actual tasks

    • action(), done()

  • The ACLMessage Class

    • Format : Agent Communication Language (ACL) as defined by FIPA

    • Asyncronous message passing paradigm

  • The DFService Class

    • To publish and search for services through method calls.


  • For further information

    • http://jade.tilab.com


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