| Bootstrap servlet to start up Spring's root
WebApplicationContext .
Simply delegates to
ContextLoader .
This servlet should have a lower load-on-startup value
in web.xml than any servlets that access the root web
application context.
Note that this class has been deprecated for containers implementing
Servlet API 2.4 or higher, in favor of
ContextLoaderListener .
According to Servlet 2.4, listeners must be initialized before load-on-startup
servlets. Many Servlet 2.3 containers already enforce this behavior. If you
use such a container, this servlet can be replaced with ContextLoaderListener.
Servlet 2.3 containers known to work with bootstrap listeners are:
- Apache Tomcat 4.x+
- Jetty 4.x+
- Resin 2.1.8+
- Orion 2.0.2+
- BEA WebLogic 8.1 SP3
For working with any of them, ContextLoaderListener is recommended.
Servlet 2.3 containers known not to work with bootstrap listeners are:
- BEA WebLogic up to 8.1 SP2
- IBM WebSphere 5.x
- Oracle OC4J 9.0.3
If you happen to work with such a server, this servlet has to be used.
So unfortunately, the only context initialization option that is compatible
with all Servlet 2.3 containers is this servlet.
Note that a startup failure of this servlet will not stop the rest of the
web application from starting, in contrast to a listener failure. This can
lead to peculiar side effects if other servlets get started that depend on
initialization of the root web application context.
author:
Juergen Hoeller
author:
Darren Davison
See Also: ContextLoaderListener
See Also: org.springframework.web.util.Log4jConfigServlet | 