物联网云平台架构——SiteWhere

　　SystemArchitecture系统架构

　　Thisdocument describes the components that make up SiteWhere and how theyrelate to each other.

　　这个文档描述了sitewhere组件和组件之间的关系。

　　ArchitectureDiagram架构图

　　Thefollowing diagram shows the main SiteWhere server components and howthey interact with externalsystems.下图展示了sitewhere服务器组件以及组件如何与外部系统的交互。

　　

　　GlobalComponents 全局组件

　　Asshown in the architecture diagram, SiteWhere is composed of manydifferent components that are wired together to provide the coreplatform. In the sections below, we will cover the components thatare global to the system. All tenants share these global settings.

　　如上面架构图所示，SiteWhere是由许多不同的组件组成，它们彼此连接共同组成核心平台。下面我们将介绍这些全局性的系统组件，所有的租户共享这些全局配置。

　　WebApplication Container Web应用容器

　　SiteWhereis deployed as a Web Application Archive (WAR) file and is designedto run in a web container such as Apache Tomcat. SiteWhere will runon a vanilla version of Apache Tomcat assuming theconfigurationfiles are copied into the Tomcat conffolder. The configuration files may be altered to change the waySiteWhere processes device events and integrates with externalservices.

　　Web应用容器

　　SiteWhere采用WAR文件部署，设计在web容器中运行，如apachetomcat。Sitewhere将在apachetomcat vanilla版本上运行，tomcat采用的配置文件直接拷贝到tomcatconf文件夹。配置文件做了一些更改，用来处理设备事件，与外部服务集成。

　　SiteWhereServer SiteWhere服务器

　　SiteWhereServer is the central application that controls all of the otherSiteWhere components. It is started automatically from the deployedWAR file and bootstraps using a Spring configuration file located inconf/sitewhere/sitewhere-server.xml. The servermanages the common system components such as user management and theREST services. It also bootstraps one or more tenant engineswhich handle most of the other processing logic.