a useful blog on web engineering

this blog and publications seems very related to my interest areas..
so note it down for later research:
http://marcobrambi.blogspot.com/

http://dbgroup.como.polimi.it/brambilla/pubs

Grid Computing vs Cloud Computing

an article comparing grid computing and cloud computing:
http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=04738445

another link for the same article:
http://people.cs.uchicago.edu/~iraicu/publications/2008_GCE08_Clouds_Grids.pdf

logging in java apps

for starter, lets begin with java.util.logging..

http://www.java-tips.org/java-se-tips/java.util.logging/how-to-use-logger.html
http://www.rgagnon.com/javadetails/java-0501.html
http://www.roseindia.net/java/example/java/util/quintessential-logging-program.shtml

and log4j..
http://logging.apache.org/log4j/1.2/manual.html
http://www.basilv.com/psd/blog/2006/tips-for-using-log4j
http://homepage.mac.com/kelleherk/iblog/C1837526061/E2136921646/index.html

the interface:

package org.apache.log4j;

 public class Logger {

   // Creation & retrieval methods:
   public static Logger getRootLogger();
   public static Logger getLogger(String name);

   // printing methods:
   public void trace(Object message);
   public void debug(Object message);
   public void info(Object message);
   public void warn(Object message);
   public void error(Object message);
   public void fatal(Object message);

   // generic printing method:
   public void log(Level l, Object message);
}

adjust log level in glassfish

Error : Java Web service. Unable to create JAXBContext

if you get the following error while deploying the web service:

Exception occured in the wsgen process javax.xml.ws.
WebServiceException: Unable to create JAXBContext build-impl.xml

it is probably because of a class with both publicly accessable members and getters/ setters..
If you make the members privately accessable or delete getter/setter methods, the error will be fixed:
see this: http://stackoverflow.com/questions/1198462/problem-with-java-web-service-unable-to-create-jaxbcontext