中间件技术周传生Chapter01 -- Middleware课件.ppt

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1、Middleware-AgendaNetworkEnvironmentChallengesofNetworkApplicationWhatisMiddleware?CategoriesofMiddleware1NetworkEnvironment-1WhatisNetworkEnvironment?BasicFeaturesofNetworkEnvironmentBasicFeaturesofNetworkApplication2NetworkEnvironment-2WhatisNetworkEnvironment?NetworkEnvironmentisaclusterof

2、computersystemswhichareconnected,collaborationandworktogethertodealwithcertaintasks.Itincludes:NetworkequipmentsComputerhardwareNetworkOperatingSystemandsoftwaretosupportnetworkoperations.3NetworkEnvironment-3WhatisNetworkEnvironment?4NetworkEnvironment-4BasicFeaturesofNetworkEnvironmentDist

3、ributionComplexityGrowthHeterogeneousContinuesEvolution5NetworkEnvironment-5BasicFeaturesofNetworkApplicationSharingOpeningParallelScalabilityFaultToleranceTransparency6NetworkEnvironment-6NetworkApplication---SharingOncebeenauthorized,theapplicationcanaccessanyresourcesinthenetworkenvironme

4、nt.Including:HardwareResources,SoftwareResources,DataResourcesResourceSharingModeldescribes:HowtosupplyresourcestoothersHowresourcesbeenusedHowdoesconsumerscommunicatewithsupplier7NetworkEnvironment-7NetworkApplication---OpeningOpenfornetworkenvironmentextendingOpenfornetworkenvironmentenhan

5、cementPublishtheinterfacedetailsofcomponentNewcomponentcanintegratewithexistingsystem8NetworkEnvironment-8NetworkApplication---ParallelAnycomponentcanbeaccessedbyparallelprocessinthenetworkenvironmentThecomponentcanaccessandupdatethesharingresourcesinthenetworkenvironmentTheparallelupdatenee

6、dedtobecontrolledtomakesurethesharingresourcescompletenessinthenetworkenvironment9NetworkEnvironment-9NetworkApplication---ScalabilityCansupportmoreconsumersapplicationQuicklyresponse—byaddingmorebestcomponentsComponentsnotneedchangesduringthenetworkenvironmentexpandingThedesignedcomponentsh

7、ouldbesuitabletothechanges10NetworkEnvironment-10NetworkApplication---FaultToleranceThesoftwarefault,hardwarefaultandnetworkfaultoccursandcannotbeavoidButcanbuildfaulttolerancemechanismbyRecoveryRedundancy11NetworkEnvironment-11NetworkApplication--