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JAVA Reflection API - An Example to invoke fields
Assume that we have 50 Java Bean classes with each class having atleast 5 fields with getter/setter methods. Now its time for you to debug the contents of each object. So how do we have to debug all these classes? - Implement a toString() method inside each class. - Create a StringBuilder/StringBuffer object inside the toString() method. - Append each and every field present inside the class to buider/buffer object in the toString() method, and then return this object by converting it into a String. - This process translates the object into a well-defined understandable textual format. Well, this is really a good process, but, keeping in mind that we have tens of classes resulting in hundreds of variables, how long do you think it'd take to debug all our classes. I bet this process sucks big time So,What is the alternative???? Lets get into programming for a while. Class-1: RootObject.java package com.devonline.reflec.samples; import java.io.Serializable;...
Server Migration from JBoss-4.0.5 to JBoss-4.2.3.GA
As the subject line says, this write-up covers a small note on JBoss Server migration. Hopefully it may not be a tough task migrating from JBoss-4.0.5 to JBoss-4.2.3 server, but I rather had a different experience while doing this. The reason behind this was the pre-compilation of the JSPs * in my project, which was performed using the jar files present in jbossweb-tomcat55.sar folder. * If I say compile/compiling in this write-up, please read it as ‘pre-compiling JSPs’ I was supposed to do the same compiling as it was done earlier when we used JBoss-4.0.5. The jar files used to compile are jasper-compiler.jar, jasper-runtime.jar, commons-el.jar and as I said earlier these files resided in the jbossweb-tomcat55.sar folder. Now where can I find jbossweb-tomcat55.sar folder in JBoss-4.2.3.? After some time, with the help of google, I was able to find out that this directory is been replaced by a new Tomcat servlet engine which is been named as jboss-web.deployer . This r...