"dbms_java.grant_permission" procedure

Question

Dear sir,
i am using standalone oc4j and my url come like 'http://localhost:8888/mapviewer/
in my machine where i am running the mapviewer. but my oracle database is on another machine and i am following two procedures to grant permissions
call dbms_java.grant_permission('CPU','SYS:java.net.SocketPermission','http://localhost:8888
','resolve');
call dbms_java.grant_permission('MDSYS','SYS:java.net.SocketPermission','http://localhost:8888
','resolve');
but when i am trying to do this following query from CPU user
giving following error
SQL> select sdo_mvclient.getdatasources() datasources from dual;
select sdo_mvclient.getdatasources() datasources from dual
ERROR at line 1:
ORA-29532: Java call terminated by uncaught Java exception:
java.lang.NullPointerException
please any one tell me how can i solve this problem
Thanks
Kabeer

Answer 1

Hi Kabeer,
This is not permission issue problem, because you receive NULL pointer exception. If, database user doesn't have access to the network java.security.AccessControlException is thrown.
I think, that you have not executed:
call sdo_mvclient.createmapviewerclient(
'http://www.mycorp.com:8888/mapviewer/omserver') ;
in the database session, before using PL/SQL MapViewer API. And, if you really have not executed this, then you will receive null pointer exception, because there is no information about remote MapViewer service in the database session.
You should follow the steps described in Section 6.2 of MapViewer 11EA1 User Guide. 6.2.1 - network access, 6.2.2 - MapViewer handle declaration (session scope).
I have deployed mvclient.jar and successfully using remote MapViewer service. Database and Mapviewer are on the different machines and network.
So, I think your problem is, that you have not declared address of remote MapViewer server in the session. According to documentation it should be declared for each session.
Regards,
Andrejus