Release 10.1A: OpenEdge Application Server:
Administration

> ## Web server and JSE configurations

> As shown in Figure 5-1, the WSA is implemented as a Java servlet that runs in the context of a JSE as a Web application. The JSE can run stand-alone (that is, with an integrated Web server), or in the context of an optional, separate Web server (such as Apache or IIS).

> When the WSA runs within the context of a JSE or Web server, several WSA instances can run within the context of the WSA Web application (such as `wsa1` and `wsa2` shown in Figure 5-1). In addition to the WSA Web application other Web applications can run within the JSE, including additional WSA instances.

> The configuration of a Web server-based WSA is:

>     Web server ( root )
>         JSE ( web-server-context )
>             WSA Web application ( wsa-webapp-context )
>                 WSA instance ( wsa-instance )
>                 ...
>             ...
>             Non-WSA Web application
>             ...
>         ...
>         Non-JSE Web resource, such as a static html page
>         ...
>     ...

> In the Web server-based WSA configuration:

> 1. There is a separate Web server.

> 2. The Web server comprises one or more JSEs (`web-server-context`) and one or more non-JSE Web resources, such as static HTML pages.

> 3. Each JSE comprises one or more WSA Web applications (`wsa-webapp-context`) and one or more non-WSA Web applications.

> 4. Each WSA Web application comprises one or more WSA instances (`wsa-instance`).

> If the JSE runs stand-alone (that is, with an integrated Web server), the JSE-based WSA configuration is:

>     Stand-alone JSE ( root )
>         WSA Web application ( wsa-webapp-context )
>             WSA instance ( wsa-instance )
>             ...
>         ...
>         Non-WSA Web application
>         ...

> In both these configurations, `web-server-context`, `wsa-webapp-context`, and `wsa-instance` appear in bold because they are components of the URL for accessing the WSA.

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