文案課程agent技術(shù)jade

IntroductionofJavaAgentDevelopmentEnvironment(JADE)

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?Introduction

§FoundationforIntelligentPhysicalAgents(FIPA)

§JavaAgentDevelopmentEnvironment(JADE)

?RunningJADEPlatform

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InstallJADEPlatform

RunJADEPlatform

RunAgentonJADEPlatform

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?IEEEComputerSocietystandardsorganization

§Abodyfordevelopingandsettingcomputersoftwarestandardsforheterogeneousandinteractingagentsandagent-basedsystems.

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?Asoftwareagent

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Apieceofsoftwarethatactsforauserorotherprogramin

arelationshipofagency

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?Agent

?LifecycleManagement

?MessageTransport

?MessageStructure

?Inter-agentInteractionProtocols

?Ontologies

?Security

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(df-agent-description

:name(agent-identifier

:name

dummy@

:addresses(sequenceiiop:///acc))

:protocolsfipa-request

:ontologies(setfipa-agent-management)

:languages(setfipa-sl0)

:lease-time+00000000T600000000T

)

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?Agentmessagetransportcomprisestwo

levels:

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TheMessageTransportProtocol(MTP)carries

outthephysicaltransferofmessagesbetweentwoACCs.

TheMessageTransportService(MTS)isprovidedbytheAPtowhichanagentisattached.TheMTSsupportsthetransportofFIPAACLmessagesbetweenagentsonanygivenAPandbetweenagentsondifferentAPs.

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Normativeservices

Optionalservices

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MessageTransportservice

HumanAgentInteraction

Yellowpageservice

OntologyService

Whitepageservice

Agent-SoftwareIntegration

LifecycleManagement

AgentPlatform

provides

Service

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?JADEisanenablingtechnology,a

middlewareforthedevelopmentandrun-timeexecutionofpeer-to-peerapplicationswhicharebasedontheagentsparadigmandwhichcanseamlessworkandinteroperatebothinwiredandwirelessenvironment.

§distributedsystemtopologywithpeer-to-peernetworking

§softwarecomponentarchitecturewithagentparadigm

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FIPA-compliantdistributedagentplatformwhichcanbesplitontoseveralhosts.

JavaApplicationProgrammer’sInterface.

LibraryofFIPAinteractionprotocols,suchasContractNet,readytobeused.

GraphicalUserInterfacetomanageseveralagentsfromthesameRemoteManagementAgent.

Availableat

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Latestversion:Jade4.5(08/06/2017)

JADEisfreesoftwareandisdistributedbyTelecomItalia

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?MobileApplications

?InternetApplications

?CorporateApplications

?Machine-to-MachineApplications

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host1.it

host2.jp

host3.us

JadedistributedAgentPlatform

JadeMain-container

JadeAgentContainer

JadeAgentContainer

Networkprotocolstack

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ApplicationAgent

ApplicationAgent

ApplicationAgent

ApplicationAgent

ApplicationAgent

ApplicationAgent

ApplicationAgent

JRE

JRE

JRE

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Inter-PlatformsMessageTransport(IIOP,HTTP,…)

Inter-ContainersMessageTransport(JavaRMI)

Intra-ContainerMessageTransport(Javaevents)

AgentCommunicationChannel

cacheofagentaddresses

DirectoryFacilitator

Yellowpageservice

AgentManagementSystem

Whitepageservice

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?ProvidesaYellowPagesservicebymeansof

whichanagentcanfindotheragents

providingtheservicesherequiresinordertoachievehisgoals.

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?Providesthenamingservice

§Ensuresthateachagentintheplatformhasauniquename

?Representstheauthorityintheplatform

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Tocreate/killagentsonremotecontainersby

requestingthattotheAMS

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?ProvidetheGUItocontrolagents’lifecycle

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?AgentCommunicationChannel(ACC)

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AgenttoAgent

AgentPlatformtoAgentPlatform

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Intra-ContainerMessageTransport(Javaevents)

Inter-ContainersMessageTransport(JavaRMI)

Inter-PlatformsMessageTransport(IIOP,HTTP,…)

AgentCommunicationChannel

cacheofagentaddresses

DirectoryFacilitator

Yellowpageservice

AgentManagementSystem

Whitepageservice

?controlstheagent’sprivatequeueofACLmessages

?designedasachameleon

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thetransportmechanismisselectedaccordingtothesituation

toachievethelowestcostformessagepassing

theoverheadsdependonthereceiver’slocationandthecachestatus

?distributedAgentCommunicationChannel

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themaincontainerisnotabottle-neck,thankstothedistributedcaches

MessageTransportProtocols(MTP)canbeactivated/deactivatedatrun-timeonanycontainerviatheGUI

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IIOPbasedontheORBimplementationofSun

IIOPbasedontheORBacusimplementation

allowstomakepersistenttheobjectreference

allowsamorefriendlyURL-formatcorbaloc:iiop:hostname:port/nameHTTPMTPprovidedbyEPFLunderLGPL

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multipleACLencodingshavebeenimplemented

String-based,XML-based(EPFL),bit-efficient(Sonera)

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agentisautonomous

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itcompletelycontrolsitsthreadofexecution

?hasaprivateproxyofthelife-cyclemanager

decidesitselfwhentoreadmessagesandwhichmessagestoread

?thetransportmechanismfillsaprivatequeuebutitdoesnotcalltheagentcode(noautomaticcallback)

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agentneedsconcurrency

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canengagemultiplesimultaneousconversations

canexecuteseveralconcurrenttasks

?Javamulti-threador/and

?JADEbehaviourswithcooperativescheduling

?onethread-per-agentratherthanonethread-per-task/conversation.

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ProgrammingModel

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AJADEagentismappedontoanuserdefinedJavaclass,thatmustsubclass

Agentclassinjade.corepackage.

AgenttasksaremappedontouserdefinedsubclassesofBehaviourclassin

jade.core.behaviourspackage.

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?Agentssend/receiveJavaobjects,thatrepresentACLMessages,withinthescopeofinteractionprotocols

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JADEhidesallmessagecoding(encoding/parsing)

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Envelopelevel

String-based,XML-based

AgentCommunicationLanguagelevel

String-based,XML-based,bit-efficient

ContentLanguagelevel

FIPASL-0+APItoregisteruser-definedcontentlanguages

supportforBase64-encodeddirectJavaobjectserialization

Ontologylevel

FIPA-AgentManagement;JADEAgentManagement

APItoregisteruser-definedcontentlanguages

theframeworkcanbeextendedbyusers

alllevelsprovideAPIstoimplement/registernewcodecs

workisinprogresstoimproveCLandontologylevelextendibility

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JADEprovidesalibraryofcommoninteractionprotocols

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usersjustneedtoimplementthehandlemethods

userscancomposeagenttaskslikesuper-statesofFSM

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?JADEsupportsintra-platformmobilityandcloning

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Aplatformcanbedistributedacrossmultiplehosts

eachhostisanagentcontainerAgentscanmigratebetweencontainersAgentscancloneacrosscontainers

Self-initiated

doMove(Location)/doClone(Location,String)

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before/afterMove()

before/afterClone()

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Requestedtotheplatform(viatheAMS)

Fipa-requestinteractionprotocol

jade.domain.MobilityOntologydefinesalltheconceptsandactionsneededtosupportagentmobilityandcloning

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?RMA(RemoteMonitoringAgent)

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tobrowsethewhiteservice

tocontroltheagentlife-cycle(e.g.remotecreation,agentmigration,…)

toactivate/deactivateMTPsoncontainers

tobrowsewhiteservicesofremoteagentplatforms

?DFGUI

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tobrowsetheyellowservice

tomakeDFfederationsandbrowseremoteDF’s

?DummyAgent

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send/receivestore/saveACLMessages

?SnifferAgent

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tosniff,debug,savetofile,multi-agentconversations

?IntrospectorAgent

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todebuganagent:queueofsent/receivedmessages,queueofbehaviours,…

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?Configurationofaplatform

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fromoneMASonasinglehost

single-hostplatform

§tooneagentonasinglehost

agentplatformonaclusterofhosts

§configurationcanbechangedatrun-time

hotrestartingispossiblethankstothelocalcaches

agentisreferredbyname=>noneedtogetnewreference

?Isthemain-containerabottle-neck?

§theAgentCommunicationChannelisdistributed

§themaincontainerisinvolvedonlywhenstrictlynecessary

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?noneedtoimplementtheAgentPlatform

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AMS,DF,andACCautomaticallylaunchedatstart-up

?noneedtoimplementagent-managementontologyandfunctionalities

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anagentisregisteredwiththeAPbytheJavaconstructoritself

itisgivenanameandanaddress

theAgentclassprovidesasimplifiedinterfacetoaccesstheservicesoftheDF

(registration,searching,…)

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?noneedtoimplementMessageTransportandParsing

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automatically(andpossiblyefficiently)donebytheframeworkwhen

sending/receivingmessages

?noneedtoimplementInteractionProtocols

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theymustonlybeextendedviahandlemethods

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?BookSeller&BookBuyer

Seller1

Seller2

Buyer

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?senderofthemessage

?listofreceivers

?communicativeintention(or“performative”)

?content

?contentlanguage

?ontology

?somefields

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?ReceivingMessages

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?BookSellerAgentextendsAgent

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importjade.core.Agent;

Initialprocess

Setup()

addBehaviour(newOfferRequestsServer());

addBehaviour(newPurchaseOrdersServer());

AgentBehaviour

importjade.core.behaviours.*;

PurchaseOrdersServerextendsCyclicBehaviour

OfferRequestsServerextendsCyclicBehaviour

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ServiceRegistration

ServiceName

ServiceType

AddBehaviour

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Servicederegistration

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?Thisabstractclassprovidesanabstractbase

classformodellingagenttasks,anditsets

thebasisforbehaviourschedulingasitallowsforstatetransitions(i.e.starting,blockingandrestartingaJavabehaviourobject).

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?classSimpleBehaviour

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Thisabstractclassmodelssimpleatomicbehaviours.Itsreset()

methoddoesnothingbydefault,butitcanbeoverriddenbyuserdefinedsubclasses.

classOneShotBehaviour

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Thisabstractclassmodelsatomicbehavioursthatmustbeexecutedonlyonceand

cannotbeblocked.So,itsdone()methodalwaysreturnstrue.

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classCyclicBehaviour

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Thisabstractclassmodelsatomicbehavioursthatmustbeexecutedforever.Soits

done()methodalwaysreturnsfalse.

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?classWakerBehaviour

§Thisabstractclassimplementsaone-shottaskthatmustbeexecutedonlyoncejustafteragiventimeoutiselapsed.

?classTickerBehaviour

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Thisabstractclassimplementsacyclictaskthat

mustbeexecutedperiodically.

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?classCompositeBehaviour

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Thisabstractclassmodelsbehavioursthataremadeupby

composinganumberofotherbehaviours(children).Sotheactualoperationsperformedbyexecutingthisbehaviourarenotdefinedinthebehaviouritself,butinsideitschildrenwhilethecompositebehaviourtakesonlycareofchildrenschedulingaccordingtoagivenpolicy.

classSequentialBehaviour

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ThisclassisaCompositeBehaviourthatexecutesitssub-behaviourssequentially

andterminateswhenallsub-behavioursaredone.Usethisclasswhenacomplextaskcanbeexpressedasasequenceofatomicsteps(e.g.dosomecomputation,thenreceiveamessage,thendosomeothercomputation).

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classParallelBehaviour

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ThisclassisaCompositeBehaviourthatexecutesitssub-behavioursconcurrently

andterminateswhenaparticularconditiononitssub-behavioursismet.ProperconstantstobeindicatedintheconstructorofthisclassareprovidedtocreateaParallelBehaviourthatendswhenallitssub-behavioursaredone,whenanyoneamo