Getting server name in ContextLoaderListener

Question

My listener is filling Cache (Terracota) and if something goes wrong at application start, ExceptionInInitializerError is thrown. I would like to get server name (like on HttpServletRequest - getServerName()) to know where this happened.

How can I come to this information??

import javax.servlet.ServletContextEvent;

import net.f.core.service.util.CacheUtil;

import org.apache.log4j.Logger;
import org.springframework.web.context.ContextLoaderListener;

/**
 * Application Lifecycle Listener implementation class OnContextLoadListener
 * 
 */
public class OnContextLoadListener extends ContextLoaderListener {

private static final Logger log = Logger
  .getLogger(OnContextLoadListener.class);

@Override
public void contextDestroyed(
  @SuppressWarnings("unused") ServletContextEvent sce) {
 // nothing here
}

@Override
public void contextInitialized(
  @SuppressWarnings("unused") ServletContextEvent sce) {

 try {
  CacheUtil.getInstance();
 } catch (ExceptionInInitializerError e) {
  log.error("Problem with application start!", e);
  // notify me
 }
}

Answer 1

HttpServletRequest.getServerName():

Returns the host name of the server to which the request was sent.

Its not a property of the server itself, it's a property of the request. It makes no sense outside of the context of the ContextLoaderListener.

What information are you actually looking for?

Answer 2

The server hostname is part of the request, as it depends on what URL the client used to reach your host.

If you are interested in the local hostname, you can try:

String hostname = InetAddress.getLocalHost().getHostName();