For a web application I make use of JSF 1.2 and Facelets.
The problem is that we now do the initialisation via a singleton pattern and that takes about 5-15 seconds because it read in data files (we are not using a database). This happens when the first user browses to the corresponding web page (the 2nd and other users don't have this delay).
I would like to have this singleton initialised right after deployment. How can I do this? I've tried to add an application bean but it does not get called. I've also tried to add a servlet as followings:
<servlet>
<description>MyApplicationContextListener S开发者_开发百科ervlet</description>
<display-name>MyApplicationContextListener Servlet</display-name>
<servlet-name>MyApplicationContextListener</servlet-name>
<servlet-class>mydomain.beans.MyApplicationContextListener</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<listener>
<listener-class>mydomain.beans.MyApplicationContextListener</listener-class>
</listener>
with the following code:
package mydomain.beans;
import javax.servlet.ServletContextEvent;
public class MyApplicationContextListener {
public void contextInitialized(ServletContextEvent event) {
System.out.println("MyApplicationContextListener.contextInitialized started");
}
public void contextDestroyed(ServletContextEvent event) {
System.out.println("MyApplicationContextListener.contextInitialized stopped");
}
}
An example including changes needed in web.xml and/or faces-config.xml would be nice!
How about using a ServletContextListener
? Its contextInitialized(..)
method will be called at the moment the context is initialized. It's mapped in web.xml
like this:
<listener>
<listener-class>com.example.MyServletContextListener</listener-class>
</listener>
Also, (not sure this would work), you can configure your faces-servlet to be loaded on startup.:
<load-on-startup>1</load-on-startup>
Clarification: For the listener approach, your listener must implement the ServletContextListener
:
public class MyServletContextListener implements ServletContextListener { .. }
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