Online tutorial,documentation to get simple servlet

Question

Hi,
I am new to servlet.
I have J2EE 1.4 SDK in my pc.
I want to develop simple servlet,deploy and run.
will you please give me some websites ,link of tutorial,documentation to write a simple servlet and deploy in j2EE 1.4?
Thank you so much

Answer 1

Hello David,
The problem seems to be with,
MBeanServer mbeanServer = MBeanServerFactory.createMBeanServer();
This does not get the MBeanServer that weblogic server uses. Try getting
the MBeanServer from MBeanHome and register your MBean in this server.
Check out
http://e-docs.bea.com/wls/docs81/jmx/basics.html
to lookup MBeanHome and getting the MBeanServer.
Thanks,
-satya
David Karr wrote:
Like other people reading this group, I'm trying to get started with JMX in WebLogic (8.1) despite the apparent lack of useful information.
I'll eventually be writing an mbean which is intended to run on each managed server (registered by a servlet) which will read and write a particular file on each managed server (contention problems are unavoidable).
In the beginning, however, I'm just trying to build a simple POC, with a servlet that creates and registers a simple mbean. That part was deceptively easy, but I'm not sure I did it right, as I'm not sure of the best way to look at the results of what I did.
I found the "wlshell" tool, which is a jmx client for WebLogic. After my servlet registers the mbean, I tried reloading the wlshell display, but I don't see anything new. I'm sure I'm misunderstanding something (probably in the "ObjectName" constructor).
The "init()" method of my servlet looks like this:
public void init()
MBeanServer mbeanServer = MBeanServerFactory.createMBeanServer();
Sample sample = new Sample();
try
ObjectName objectName = new ObjectName("Sample:name=sample");
mbeanServer.registerMBean(sample, objectName);
The Mbean and impl look like:
public interface SampleMBean
public void setFlag(boolean flag);
public boolean getFlag();
public class Sample implements SampleMBean
private boolean flag;
public void setFlag(boolean flag) { this.flag = flag; }
public boolean getFlag() { return (flag); }