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package org.glassfish.weld;
import javax.enterprise.inject.spi.BeanManager;
import javax.inject.Inject;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.jsp.JspApplicationContext;
import javax.servlet.jsp.JspFactory;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.jasper.runtime.JspApplicationContextImpl;
import org.glassfish.cdi.CDILoggerInfo;
import org.jboss.weld.el.WeldELContextListener;
/**
* ServletContextListener implementation that ensures (for Weld applications)
* the correct Weld EL Resolver and Weld EL Context Listener is used for JSP(s).
*/
public class WeldContextListener implements ServletContextListener {
private Logger logger = Logger.getLogger(WeldContextListener.class.getName());
@Inject
private BeanManager beanManager;
/**
* Stash the Weld EL Resolver and Weld EL Context Listener so it is recognized by JSP.
*/
public void contextInitialized(ServletContextEvent sce) {
if (null != beanManager) {
JspApplicationContext jspAppContext = JspFactory.getDefaultFactory().
getJspApplicationContext(sce.getServletContext());
jspAppContext.addELResolver(beanManager.getELResolver());
try {
Class weldClass = Class.forName("org.jboss.weld.el.WeldELContextListener");
WeldELContextListener welcl = (WeldELContextListener)weldClass.newInstance();
jspAppContext.addELContextListener(welcl);
} catch (Exception e) {
logger.log(Level.WARNING,
CDILoggerInfo.CDI_COULD_NOT_CREATE_WELDELCONTEXTlISTENER,
new Object [] {e});
}
((JspApplicationContextImpl)jspAppContext).setExpressionFactory(
beanManager.wrapExpressionFactory(jspAppContext.getExpressionFactory()));
}
}
public void contextDestroyed(ServletContextEvent sce) {
if (null != beanManager) {
beanManager = null;
}
}
}