Cannot see nodes and attached map in JMX console

[billwangbill]

I am a newbie for Jboss Treecache. I am going to put treecache into my
jboss server. the following are my config values for Eviction:
1000
0
0

I call the method putCacheData to save data in treecache in the first request( through Struts, Ejb3)
putCacheData() {
.....
tree.put("/classes/cs-101", "description", "the basics");
tree.put("/classes/cs-101", "teacher", "Ben");
....
}

I only can see node classes in JMX console and no /classes/cs-101 in tree.
and then I call getCacheData() method in another request
getCacheData() {
.....
String descValue = (String) tree.get("/classes/cs-101", "description"
String csValue = (String) tree.get("/classes/cs-101", "teacher");
....
}

both descValue and csValue are null in the debug mode

Could somebody help me? I need see what value put into tree in the different request even though different session with application scope variable. Thanks in advance.

Bill

[manik]

Have you tried using Fqn.fromString() instead of using Strings?

[billwangbill]

Thanks. I get the following error message by using
Fqn.fromString()
javax.management.IntrospectionException: Failed to find PropertyEditor for type: org.jboss.cache.Fqn
org.jboss.jmx.adaptor.control.Server.invokeOpByName(Server.java:251)
org.jboss.jmx.adaptor.control.Server.invokeOp(Server.java:223)
org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.invokeOp(HtmlAdaptorServlet.java:262)
org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.processRequest(HtmlAdaptorServlet.java:100)
org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.doPost(HtmlAdaptorServlet.java:82)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

However, I am going to use TreeCache to resolve issue like case as follows:
No User A User B
1 Request read v(= 5)
2 Request read v( =5 )
3 Change v (8) (screen)
4 change v (6) (screen)
5 save v Transaction Tb
6 save v Transaction Ta

I want to protect variable v without querying database. So User A save action should be rejected. To do this, Ta need know v is changed by Tb. Ta start after Tb finish.

Thank you again,

Bill

[manik]

I just realised that you are doing this via JMX. JMX won't support objects like Fqn.

Does this work if you work on the cache directly, rather than via JMX?

[billwangbill]

I have tried using Fqn put value in my DAO layer when user B retrieve data from DB. They are available to read in EJB 3 layer. They disppear when user B in saving processing except for their parent nodes. Nodes that are attached data are only exist in the same request. Do all the nodes with data have to bundle to a GlobalTrasaction? Could you tell me a way to let other GlobalTransactions cannot see them? Thank you very much.