中间件技术周传生Chapter01 -- Middleware课件
53页1、1,Middleware - Agenda,Network Environment Challenges of Network Application What is Middleware? Categories of Middleware,2,Network Environment - 1,What is Network Environment? Basic Features of Network Environment Basic Features of Network Application,3,Network Environment - 2,What is Network Environment? Network Environment is a cluster of computer systems which are connected, collaboration and work together to deal with certain tasks. It includes: Network equipments Computer hardware Network O
2、perating System and software to support network operations.,4,Network Environment - 3,What is Network Environment?,5,Network Environment - 4,Basic Features of Network Environment Distribution Complexity Growth Heterogeneous Continues Evolution,6,Network Environment - 5,Basic Features of Network Application Sharing Opening Parallel Scalability Fault Tolerance Transparency,7,Network Environment - 6,Network Application - Sharing Once been authorized, the application can access any resources in the
3、network environment. Including: Hardware Resources, Software Resources, Data Resources Resource Sharing Model describes: How to supply resources to others How resources been used How does consumers communicate with supplier,8,Network Environment - 7,Network Application - Opening Open for network environment extending Open for network environment enhancement Publish the interface details of component New component can integrate with existing system,9,Network Environment - 8,Network Application -
4、Parallel Any component can be accessed by parallel process in the network environment The component can access and update the sharing resources in the network environment The parallel update needed to be controlled to make sure the sharing resources completeness in the network environment,10,Network Environment - 9,Network Application - Scalability Can support more consumers application Quickly responseby adding more best components Components not need changes during the network environment expa
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