Message service enhancements  Java XML parser integration

Chapter 7: New Features in EAServer 4.0

Servlet, JSP, and Web application enhancements

EAServer 4.0 supports the Servlet 2.3 and JSP 1.2 specifications, and adds support to connect Web applications hosted in EAServer to popular Web servers such as Apache and Netscape.


Servlet filters and application lifecycle event handlers

EAServer 4.0 supports servlet filters. Using servlet filters, you can preprocess servlet requests and postprocess servlet responses. You can install code that executes in response to changes in the servlet context or HTTP sessions associated with your Web application. For details on these features, see Chapter 23, “Using Filters and Event Listeners,” in the EAServer Programmer’s Guide.


JSP 1.2 support

EAServer 4.0 supports the JSP 1.2 specification. JSP 1.2 extends JSP 1.1 in a number of ways:

For information on creating JSPs in EAServer, see Chapter 24, “Creating JavaServer Pages,” in the EAServer Programmer’s Guide.


Standard extensions

In accord with the Servlet 2.3 specification, EAServer allows you to install extensions and define the extensions required by a Web application. If you import a Web application (in WAR format) that requires extensions that are not installed, EAServer Manager warns you of the unfulfilled dependencies. For more information, see Chapter 21, “Creating Web Applications,” in the EAServer Programmer’s Guide


Web server redirector plug-in

The Web server redirector plug-in allows communication between the Web server and the EAServer HTTP protocol listener. You can integrate a Web server and EAServer by installing the redirector plug-in on the Web server host. Client requests are sent directly to the Web server, which forwards requests to EAServer that need to access EAServer resources. EAServer processes the requests and returns the results back to the Web server. For details, see the EAServer Installation Guide.





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