1.2 Introduction.pdf

WebLogic简介 2Enterprise System Requirements The capability of a system to identify users and control access to sensitive dataSecurity A measure of the ease with which a system can be upgraded, debugged, configured and reconfigured Maintainability The capability of system to process increasing client request volume without service degradation Scalability The capability of a system to transfer control to a backup component when a fault occursFailover Distributing incoming client requests to system resourcesLoad-Balancing The capability of a system to process client requests with little or no down timeHigh Availability DescriptionRequirement 3J2EE Architecture 4BEA Weblogic Server 操作系统，硬件 WebLogic Server Application Mobile Web Service Browser 数据源 ERP CRM 客户端 Database Packaged Applications Custom Applications 支持众多网络客户端和企业级应用的单一基础应用平台 Web Service 5WebLogic Server Architecture WebLogic Web Server Web Servers Plug-ins Third-Party Web Server Crypto Hardware Load Balancing Hardware BEA WebLogic Enterprise Platform Services APPLICATIONS JVM/Operating System Server, Server Appliance Server Management Clustering Business Logic Container Transaction Management Caching Application Security Enterprise Messaging Web Services Database Connection EAI (Connector Architecture) 6? HTTP ? Clustering ? Load balancing ? Failover ? JSP Servlet ? Caching ? Virtual Hosting ? CGI ? XML support ? Plug-ins for: – Apache – Microsoft IIS – iPlanet WebLogic Presentation tier WebLogic Web Server Web Servers Plug-ins Third-Party Web Server Crypto Hardware Load Balancing Hardware BEA WebLogic Enterprise Platform Services APPLICATIONS JVM/Operating System Server, Server Appliance Server Management Clustering Business Logic Container Transaction Management Caching Application Security Enterprise Messaging Web Services Database Connection EAI (Connector Architecture) 7WebLogic Middle tier ? J2EE Services – Session, Entity, Message Driven Beans (EJB 2.0) – Naming and Dir