org.hd.d.pg2k.webSvr.util
Class WebUtils.ServletLoggerWithFallback

java.lang.Object
  org.hd.d.pg2k.webSvr.util.WebUtils.ServletLoggerWithFallback

All Implemented Interfaces:

SimpleLoggerIF

Enclosing class:

WebUtils

public static final class WebUtils.ServletLoggerWithFallback
extends java.lang.Object
implements SimpleLoggerIF

Simple class to allow logging to a given servlet's log() or System.out if none available. This allows a logger to be created at instance scope for (say) a Filter, and set with a context when the config is set and cleared when one is not available, all the while remaining a valid logger.

This holds only a WeakReference to the ServletContext so as not to obstruct GC when all strong refs go away.

ctxtWR

private volatile java.lang.ref.WeakReference<javax.servlet.ServletContext> ctxtWR

Weak ref to servlet context; may be null or the referent may be.

WebUtils.ServletLoggerWithFallback

public WebUtils.ServletLoggerWithFallback()

setContext

public void setContext(javax.servlet.ServletContext context)

Set context, or clear/remove it if null.

log

public void log(java.lang.String message)

Log the given message. Logs to the servlet context logger if available, else logs to System.out.

Specified by:

log in interface SimpleLoggerIF