JMS + Applet

Question

Hello all,
I am trying to use jms via an applet and i am facing some problems....
1st of all, from a browser window I get an ecxeption
"java.lang.NoClassDefFoundError: javax/jms/JMSException" . I guess that it is related to the path of the applet code and the path to j2ee.jar. But this problem still exists when I copy j2ee.jar in the same dir as the applet code .
When I am using the appletviewer, the previous problem is overcome. But then I get the following exception:
Could not create JNDI context: javax.naming.NoInitialContextException: Cannot in
stantiate class: com.sun.enterprise.naming.SerialInitContextFactory [Root except
ion is java.security.AccessControlException: access denied (java.util.PropertyPe
rmission javax.rmi.CORBA.UtilClass read)]
java.security.AccessControlException: access denied (java.lang.RuntimePermission
exitVM)
at java.security.AccessControlContext.checkPermission(AccessControlConte
xt.java:272)
at java.security.AccessController.checkPermission(AccessController.java:
399)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:545)
at java.lang.SecurityManager.checkExit(SecurityManager.java:765)Could no
t create JNDI context: javax.naming.NoInitialContextException: Cannot instantiat
e class: com.sun.enterprise.naming.SerialInitContextFactory [Root exception is j
ava.security.AccessControlException: access denied (java.util.PropertyPermission
javax.rmi.CORBA.UtilClass read)]
at java.lang.Runtime.exit(Runtime.java:91)
at java.lang.System.exit(System.java:701)
at MyApplet.init(MyApplet.java:63)
at sun.applet.AppletPanel.run(AppletPanel.java:344)
at java.lang.Thread.run(Thread.java:484)
java.security.AccessControlException: access denied (java.lang.RuntimePermission
exitVM)
at java.security.AccessControlContext.checkPermission(AccessControlConte
xt.java:272)
at java.security.AccessController.checkPermission(AccessController.java:
399)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:545)
at java.lang.SecurityManager.checkExit(SecurityManager.java:765)
at java.lang.Runtime.exit(Runtime.java:91)
at java.lang.System.exit(System.java:701)
at MyApplet.init(MyApplet.java:63)
at sun.applet.AppletPanel.run(AppletPanel.java:344)
at java.lang.Thread.run(Thread.java:484)
I guess that this is related to the Security Manager, and the restrictions it applies. (btw how do we pass the properties needed for the jms queue to function
"jms.properties=%J2EE_HOME%\config\jms_client.properties" ? )
A simple example would be very helpfull.
Thanks,
Manos

Answer 1

U need to use the j2re-1_3_0_02-win (install it ,its a java plug in tool).
write a file called java.policy
which containes code as follows
grant {
permission java.security.AllPermission;
save the above file as java.policy in c:/
then open the java-plug in console (go to control panel there u will find the plug in double click it)
select all check boxes,and give the startup parameters as
-Djava.security.policy=c:/java.policy
then
in the html code where applet gets loaded write this code
<OBJECT name = "appletTalk" classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
width="300" height="300" align="baseline" NAME="plg"
codebase="http://java.sun.com/products/plugin/1.3/jinstall-13-win32.cab#Version=1,3,0,0">
<PARAM NAME="code" VALUE="ClientApplet">
<PARAM NAME="archive" VALUE="http://earth:8001/sekhar-jsp/weblogic.jar">
<PARAM NAME="codebase" VALUE="/sekhar-jsp/">
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.3">
<PARAM NAME="server" value="earth:8001">
<PARAM NAME="servlet" value="autexfi/push">
<PARAM NAME="connection" value="t3http">
<PARAM NAME="scriptable" VALUE="true">
<PARAM NAME="mayscript" VALUE="true">
<PARAM NAME="nclients" VALUE="1000">
<COMMENT>
<EMBED type="application/x-java-applet;version=1.3" width="400"
height="300" align="baseline" code="ClientApplet"
codebase="/sekhar-jsp/"
archive="http://earth:8001/sekhar-jsp/weblogic.jar"
pluginspage="http://java.sun.com/products/plugin/1.3/plugin-install.html"
scriptable="true"
mayscript="true"
>
<NOEMBED>
</COMMENT>
No Java 2 SDK, Standard Edition v 1.3 support for APPLET!!
</NOEMBED>
     </EMBED>
No Java 2 SDK, Standard Edition v 1.3 support for APPLET!!
</OBJECT>
use appropriate names where ever u fing necessary