all,
I use BEA's Weblogic as my EJB server.I use the statefulSession
sample and it work well.But when I change the Client.class to a Applet,it
can't work.
The applet's code is following(i don't modify it much,only change
main() to init()):
package examples.ejb.basic.statefulSession;
import javax.ejb.*;
import javax.naming.*;
import java.rmi.RemoteException;
import java.util.*;
import java.applet.*;
public class Client_A extends Applet {
static String url = "t3://localhost:7001";
static String user = null;
static String password = null;
public void init(){
System.out.println("\nBeginning statefulSession.Client...\n");
String customerName = "Erin";
try {
Context ctx = getInitialContext();
examples.ejb.basic.statefulSession.TraderHome brokerage =
(examples.ejb.basic.statefulSession.TraderHome)
ctx.lookup("statefulSession.TraderHome");
examples.ejb.basic.statefulSession.Trader trader =
brokerage.create("Terry");
System.out.println("Creating trader " + trader.getTraderName() +
"\n");
String stockName;
int numberOfShares;
for (int i = 1 ; i <= 5; i++) {
System.out.println("Start of Transaction " + i + " for " +
customerName);
stockName = "WEBL";
numberOfShares = 100 * i;
System.out.println("Buying " + numberOfShares + " of " + stockName);
examples.ejb.basic.statefulSession.TradeResult tr =
trader.buy(customerName, stockName, numberOfShares);
System.out.println("...Bought " + tr.numberTraded + " at $" +
tr.priceSoldAt);
stockName = "INTL";
numberOfShares = 100 * (i+1);
System.out.println("Selling " + numberOfShares + " of " +
stockName);
tr = trader.sell(customerName, stockName, numberOfShares);
System.out.println("...Sold " + tr.numberTraded + " at $" +
tr.priceSoldAt);
System.out.println("Change in Cash Account: $" +
trader.getBalance());
System.out.println("End of Transaction " + i + "\n");
}
System.out.println("Change in Cash Account: $" + trader.getBalance() +
"\n");
System.out.println("Removing trader " + trader.getTraderName());
trader.remove();
}
catch (examples.ejb.basic.statefulSession.ProcessingErrorException pe) {
System.out.println("Processing Error: " + pe);
}
catch (Exception e) {
System.out.println(":::::::::::::: Error :::::::::::::::::");
e.printStackTrace();
}
System.out.println("\nEnd statefulSession.Client...\n");
}
static void parseArgs(String args[]) {
if ((args == null) || (args.length == 0))
return;
for (int i = 0; i < args.length; i++) {
if (args[i].equals("-url"))
url = args[++i];
else if (args[i].equals("-user"))
user = args[++i];
else if (args[i].equals("-password"))
password = args[++i];
}
}
static public Context getInitialContext() throws Exception {
Hashtable h = new Hashtable();
h.put(Context.INITIAL_CONTEXT_FACTORY,
"weblogic.jndi.WLInitialContextFactory");
h.put(Context.PROVIDER_URL, url);
if (user != null) {
System.out.println ("user: " + user);
h.put(Context.SECURITY_PRINCIPAL, user);
if (password == null)
password = "";
h.put(Context.SECURITY_CREDENTIALS, password);
}
return new InitialContext(h);
}
}
The following is .html file :
<HTML>
<HEAD>
<TITLE>L</TITLE>
</HEAD>
<BODY>
<APPLET CODE="examples.ejb.basic.statefulSession.Client_A.class"
archive="/weblogic/classes/applets.jar,/weblogic/lib/weblogicaux.jar"
WIDTH=430 HEIGHT=270></APPLET>
</BODY>
</HTML>
when I run it ,from java console,I get the error:
Beginning statefulSession.Client...
com.ms.security.SecurityExceptionEx[weblogic/jndi/Environment.getProperty]:
Unable to access system property: weblogic.jndi.provider.rjvm
at com/ms/security/permissions/PropertyPermission.check
(PropertyPermission.java)
at com/ms/security/PolicyEngine.shallowCheck (PolicyEngine.java)
at com/ms/security/PolicyEngine.checkCallersPermission (PolicyEngine.java)
at com/ms/security/StandardSecurityManager.chk
(StandardSecurityManager.java)
at com/ms/security/StandardSecurityManager.checkPropertyAccess
(StandardSecurityManager.java)
at java/lang/System.getProperty (System.java)
at weblogic/jndi/Environment.getProperty (Environment.java:756)
at weblogic/jndi/Environment.getProviderRJVM (Environment.java:849)
at weblogic/jndi/WLInitialContextFactory.getInitialContext
(WLInitialContextFactory.java:199)
at weblogic/jndi/WLInitialContextFactory.getInitialContext
(WLInitialContextFactory.java:180)
at javax/naming/spi/NamingManager.getInitialContext
(NamingManager.java:771)
at javax/naming/InitialContext.getDefaultInitCtx (InitialContext.java:169)
at javax/naming/InitialContext.<init> (InitialContext.java:129)
at examples/ejb/basic/statefulSession/Client_A.getInitialContext
(Client_A.java:133)
at examples/ejb/basic/statefulSession/Client_A.init (Client_A.java:48)
at com/ms/applet/AppletPanel.securedCall0 (AppletPanel.java)
at com/ms/applet/AppletPanel.securedCall (AppletPanel.java)
at com/ms/applet/AppletPanel.processSentEvent (AppletPanel.java)
at com/ms/applet/AppletPanel.processSentEvent (AppletPanel.java)
at com/ms/applet/AppletPanel.run (AppletPanel.java)
at java/lang/Thread.run (Thread.java)
com.ms.security.SecurityExceptionEx[weblogic/utils/Debug.<clinit>]: Unable
to access system property: debug.methodNames
at com/ms/security/permissions/PropertyPermission.check
(PropertyPermission.java)
at com/ms/security/PolicyEngine.shallowCheck (PolicyEngine.java)
at com/ms/security/PolicyEngine.checkCallersPermission (PolicyEngine.java)
at com/ms/security/StandardSecurityManager.chk
(StandardSecurityManager.java)
at com/ms/security/StandardSecurityManager.checkPropertyAccess
(StandardSecurityManager.java)
at java/lang/System.getProperty (System.java)
at java/lang/Boolean.getBoolean (Boolean.java)
at weblogic/utils/Debug.<clinit> (Debug.java:32)
at weblogic/utils/Debug.assert (Debug.java)
at weblogic/common/internal/ThreadStorage.current (ThreadStorage.java:35)
at weblogic/common/internal/DNSBasedRJVMFinder.findOrCreate
(DNSBasedRJVMFinder.java:175)
at weblogic/common/internal/ServerURL.findOrCreateRJVM (ServerURL.java:156)
at weblogic/jndi/WLInitialContextFactory.getInitialContext
(WLInitialContextFactory.java:265)
at weblogic/jndi/WLInitialContextFactory.getInitialContext
(WLInitialContextFactory.java:180)
at javax/naming/spi/NamingManager.getInitialContext
(NamingManager.java:771)
at javax/naming/InitialContext.getDefaultInitCtx (InitialContext.java:169)
at javax/naming/InitialContext.<init> (InitialContext.java:129)
at examples/ejb/basic/statefulSession/Client_A.getInitialContext
(Client_A.java:133)
at examples/ejb/basic/statefulSession/Client_A.init (Client_A.java:48)
at com/ms/applet/AppletPanel.securedCall0 (AppletPanel.java)
at com/ms/applet/AppletPanel.securedCall (AppletPanel.java)
at com/ms/applet/AppletPanel.processSentEvent (AppletPanel.java)
at com/ms/applet/AppletPanel.processSentEvent (AppletPanel.java)
at com/ms/applet/AppletPanel.run (AppletPanel.java)
at java/lang/Thread.run (Thread.java)
com.ms.security.SecurityExceptionEx[weblogic/t3/services/ConfigClient.configure]:
Unable to access system properties.
at com/ms/security/permissions/PropertyPermission.check
(PropertyPermission.java)
at com/ms/security/PolicyEngine.shallowCheck (PolicyEngine.java)
at com/ms/security/PolicyEngine.checkCallersPermission (PolicyEngine.java)
at com/ms/security/StandardSecurityManager.chk
(StandardSecurityManager.java)
at com/ms/security/StandardSecurityManager.checkPropertiesAccess
(StandardSecurityManager.java)
at java/lang/System.getProperties (System.java)
at weblogic/t3/services/ConfigClient.configure (ConfigClient.java:54)
at weblogic/rjvm/Kernel.ensureInitialized (Kernel.java:110)
at weblogic/common/internal/DNSBasedRJVMFinder.findOrCreate
(DNSBasedRJVMFinder.java:203)
at weblogic/common/internal/ServerURL.findOrCreateRJVM (ServerURL.java:156)
at weblogic/jndi/WLInitialContextFactory.getInitialContext
(WLInitialContextFactory.java:265)
at weblogic/jndi/WLInitialContextFactory.getInitialContext
(WLInitialContextFactory.java:180)
at javax/naming/spi/NamingManager.getInitialContext
(NamingManager.java:771)
at javax/naming/InitialContext.getDefaultInitCtx (InitialContext.java:169)
at javax/naming/InitialContext.<init> (InitialContext.java:129)
at examples/ejb/basic/statefulSession/Client_A.getInitialContext
(Client_A.java:133)
at examples/ejb/basic/statefulSession/Client_A.init (Client_A.java:48)
at com/ms/applet/AppletPanel.securedCall0 (AppletPanel.java)
at com/ms/applet/AppletPanel.securedCall (AppletPanel.java)
at com/ms/applet/AppletPanel.processSentEvent (AppletPanel.java)
at com/ms/applet/AppletPanel.processSentEvent (AppletPanel.java)
at com/ms/applet/AppletPanel.run (AppletPanel.java)
at java/lang/Thread.run (Thread.java)
EnableReplaceObject failed.
RMI implementations hosted by this VM should not be buried in
java.io.Serializable data.
:::::::::::::: Error :::::::::::::::::
[Root exception is weblogic.rmi.UnmarshalException: Unmarshalling return
- with nested exception:
[java.lang.ClassNotFoundException:
weblogic.Server]]javax.naming.CommunicationException
at weblogic/jndi/toolkit/ExceptionTranslator.toNamingException
(ExceptionTranslator.java:65)
at weblogic/jndi/toolkit/ExceptionTranslator.toNamingException
(ExceptionTranslator.java:26)
at weblogic/jndi/WLInitialContextFactory.toNamingException
(WLInitialContextFactory.java:513)
at weblogic/jndi/WLInitialContextFactory.newContext
(WLInitialContextFactory.java:356)
at weblogic/jndi/WLInitialContextFactory.getInitialContext
(WLInitialContextFactory.java:275)
at weblogic/jndi/WLInitialContextFactory.getInitialContext
(WLInitialContextFactory.java:180)
at javax/naming/spi/NamingManager.getInitialContext
(NamingManager.java:771)
at javax/naming/InitialContext.getDefaultInitCtx (InitialContext.java:169)
at javax/naming/InitialContext.<init> (InitialContext.java:129)
at examples/ejb/basic/statefulSession/Client_A.getInitialContext
(Client_A.java:133)
at examples/ejb/basic/statefulSession/Client_A.init (Client_A.java:48)
at com/ms/applet/AppletPanel.securedCall0 (AppletPanel.java)
at com/ms/applet/AppletPanel.securedCall (AppletPanel.java)
at com/ms/applet/AppletPanel.processSentEvent (AppletPanel.java)
at com/ms/applet/AppletPanel.processSentEvent (AppletPanel.java)
at com/ms/applet/AppletPanel.run (AppletPanel.java)
at java/lang/Thread.run (Thread.java)
End statefulSession.Client...
I don't know how to result this problem.
Need I add other .jar to archive tag in .html?
Thanks in advance.
Huyong
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