I have deployed the very simple standard MBean example of the JBoss Administration and
Development Book (3.2.3) which binds a HashMap into JNDI, and then I played with it
around, but I got some problems. So here are my questions:
1. The HashMap was successfully bound into JNDI, and I can see my service on the JMX
console. Then I wrote a client which does a lookup on the HashMap, as follows:
map = (HashMap) getContext().lookup("inmemory/maps/MapTest2");
Seems to be okay, because I donÂt get any NamingException. But how can I use the
HashMap then? How can I access the content now? When I want to use the map, I get a
NullPointerException. Why is it null??
2. I would like to call functions on my mbean, from a client or another mbean. Do I
have to use an adapter for that, or can I access the mbean directly via JNDI?? How can
I give my mbean a JNDI name?
3. In the mbeanÂs start() method I tried to create a serial connection to a PLC. But
when I deploy the SAR file, the usage of the classes for the serial communication
causes a NoClassDefFoundError Exception. But I added the javax.comm package to my
Eclipse project, and when I put the same serial port access code into my client
application (within the same project), it works and I donÂt get any exception. So why
canÂt my mbean find these classes? Do I have to add something to the descriptor file??
I would really like to use my mbean...
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