Applet - EJB Connection

When I try to make a jndi lookup, I get the following error. Did anybody faced similar problem? The error occurs at the line where I call the look up through the initialcontext object. I have signed my applet. It is working locally, but not from other systems (even within the LAN). I use Jboss4.0.1 and have included all the necessary client jar files.
java.lang.IllegalArgumentException: hostname can't be null
at java.net.InetSocketAddress.<init>(Unknown Source)
at org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:1101)
at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1232)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:527)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:520)
at javax.naming.InitialContext.lookup(Unknown Source)

Similar Messages

Is there a way to do that? To use dynamic EJB connections?

Hello Developers,
I have developed a security web application using EJB,
Jaas with customer provider
I used DBSystemLogin module
I want to fined a way that the EJB connection change each time when the user login.
I used the HR as the main schema.
I created three schemas that I want to use them as users:
-Lina
-Salem
-Ahmad
I granted Roles to users on hr tables.
additional, created my own roles in data base and granted to my users:
ADMINISTRATOR  Lina - can see all records
EMPLOYEE Ahmad -can see the records added by this employee
CUSTOMER  Salem - can see the records belongs to this customer
In developer 10.1.3.3
I created Order Entity been using HR database connection, created session been,
Modified web.xml:
-security roles["ADMINISTRATOR","EMPLOYEE","CUSTOMER"])
-Loginconfig (Form-based authentication: login page, error page)
-Security constraints: ord on /faces/Orders.jsp to ADMINISTRATOR,EMPLOYEE,CUSTOMER.
I created Orders.jsp page contains order table.
Now, I want that when the user login as Lina to switch the EJB database connection to Lina, so the displayed order table achieves ADMINISTRATOR roles that created in database,means opening database session for user Lina and use it.
and so on for user salem and ahmad.
Is there a way to do that? To use dynamic EJB connections? To achieve authentication based connection? to implement the user database roles on the client side? To specify the database connection at run time?
That is possible using forms but I don’t want to use forms.
I want to reed the roles from database according to the user.
I hope to get answers soon,
thanks.

Does JNDI do this job?

Applet socket connection

Hi,
I have an applet that connects to a server java console program through a socket connection which works fine from the command line using appletviewer but doesn't work when running in a html page. The applet is not signed however because the applet and server are running on the same machine it shouldn't need to be. I have used socket connections in applets before and have managed to make the connection to server without having it signed but this one is not working for some reason. I have checked the port is opened and again its the same one I have used before so I know its open.
I am getting the message java.security.AccessControlException: access denied (java.net.SocketPermission 127.0.0.1:5000 connect,resolve) when calling:
Socket s = new Socket(ip,port);I also have a java.policy.applet file in the project root directory which has the following in:
grant {
permission java.security.AllPermission;
};Does anyone know a reason why access could be restricted?

Night.Monkey wrote:
Hi,
I have an applet that connects to a server java console program through a socket connection which works fine from the command line using appletviewer but doesn't work when running in a html page. The applet is not signed however because the applet and server are running on the same machine it shouldn't need to be.Wrong. An unsigned applet can only connect back to the server from where it was downloaded. Your applet comes from www.javawebgames.co.uk and tries to connect to 127.0.0.1.
Would your server be at www.javawebgames.co.uk there should be no problem.
I also have a java.policy.applet file in the project root directory which has the following in:
grant {
permission java.security.AllPermission;
};I think this should have zero effect when you are running in the actual browser.

Applet EJB Coomunication

Hi,
I am trying the applet ejb communication .
I am very comfortable if I do the same with applet servlet communication but the problem is with the applet calling the ejb directly, i mean to say that can applet can directly lookup the EJB ?
I had tried on the intranet but we are supposed to give the HOme and remote files to the client also the ejb.jar has to be given as the JVM of the clinet doesnot have the javax.ejb package and all relevant pacakages are to be given,
There is no meaning of making the client EJB compitable.
Also what about the security ?
So can any body help me how to do the same.
Thanks in advance.
Milind

Remove ur applet ejb communication by
applet to servlet/serverside class then from that servlet/serverside clas to ejb..
This concept is done by a pattern called 'business delegate'.
By using this approach u need not give the stub and skull to the front end side (jsp/applet/or anything like that).
just call the servlet/class from the applet by keeping that class as passover and thereby the lookup details are moved to that servlet/class that could resolve your problem..
does my answer make any sense to u..

OAS - EJB connectivity

Hi,
I've been trying to connect my EJBs with OAS(4.0.8 and 4.0.8.1) on NT. I could not get it connected. Before we continue to spend more time to explore, can somebody tell me if he/she ever made it work successful?
Raghu, I notice that you've been giving out great advice to others. I tried your methods and I still could not get it connected.
EJBs on OAS 4.0.8 (I also tried 4.0.8.1 ), today), does anybody make it work at all? Or, we just made some silly mistakes in our configuration.
We really need to get it work.
Thanks.

Raghu,
In general, I do have the following unknowns:
1. when I start up OAS (4.0.8 or 4.0.8.1), I get an error on "ORAPERF8.DLL" not found in my path. I could not find this file from my entire PC nor all my Oracle CDs. This has not caused me much problem. I don't know if it causes my problems with EJB connectivity.
I reinstall OAS many times and this problem does not go away.
2. I had my Oracle 8i and OAS on the same NT. According to the release notes, we have to do some workarounds and I did. It still did not solve my EJB problems. I installed Oracle 8.0.5. No help.
3. I have had many different problems during EJB deployments and I had then overcome. Right now, the program hangs when connecting (narrow) to the home interface.
Tommorrow, I will reinstall my NT, Oracle DB and OAS. I hope I have better luck this way.
By the way, I've tried the ways you suggested including http://www.domain.com:80/ows-bin/rmproxy.ior
. I had no problem with it.
null

Monitoring EJB,Connection Pool,Servlets

Hi,
i have one doubt does oracle provides any MBeans to monitor ejb,connection pools etc..?
thanks &regards
Magesh.N

Hi,
i have one doubt does oracle9ias provides any MBeans to monitor ejb,connection pools etc..?
thanks .ards
Magesh.N

Applet database connection

I've written an applet that connects to a MS Access database. This applet works fine when run in Appletviewer (with the policy file included). The problem is when I try to run it in a Browser the applet is "not initialized" Can anyone suggest a solution. The point of this applet is to be placed on a web page and it will access the database on the same server. The applet will never have to talk to the machnine it's being run on. Thanks in advance

I just checked the error message in the Java Console and I get the following message.
java.security.AccessControlException: access denied (java.lang.RuntimePermission accessClassInPackage.sun.jdbc.odbc) at java.security.AccessControlContext.checkPermission(Unknown Source)
the applet simply looks in the database and outputs some text to the browser based on what's in the database. It write nothing to the server or anywhere else. I set up the permissions via a policy file. Is there a way to allow the browser to access the policy file??
for instance in appletviewer I can provide the following
appletviewer -J-Djava.security.policy=policyfile page.htm
where policyfile is the policy file with the appropriate permissions. How can I get the webbrowser to access this file???
thanks again

How an applet can connect to a data base?

how an applet can connect to a data base?

You need to set up a policy, it's a bit convoluted, see http://developer.java.sun.com/developer/onlineTraining/Programming/BasicJava1/dba.html#applet for more.

Does anyone know how to set policy file, so applet can connect other host?

I have an signed applet, it may connect to other host.
The applet should display a HTML pages, which may contains image tag points to a picture stored anywhere. I use a JTextPane to display this HTML page, but when it is loaded. a error occurs.
java.lang.SecurityException
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkConnect(Unknown Source)
at sun.awt.image.URLImageSource.checkSecurity(Unknown Source)
at sun.awt.image.ImageRepresentation.imageComplete(Unknown Source)
at sun.awt.image.InputStreamImageSource.errorConsumer(Unknown Source)
at sun.awt.image.InputStreamImageSource.setDecoder(Unknown Source)
at sun.awt.image.InputStreamImageSource.doFetch(Unknown Source)
at sun.awt.image.ImageFetcher.fetchloop(Unknown Source)
at sun.awt.image.ImageFetcher.run(Unknown Source)
I have those kind of error (connection refused) before I signed my applet and write policy file to granr socketpermission to the codebase of my class files. But this error still occurs. I suppose it is because the sun.awt.image.* is Java standard class, so my policy file has no effect on them. But how can I make it works?

you need to install the jre, and place the win32.dll at JavaSoft\JRE\1.3.1_06\bin, that properties file place at JavaSoft\JRE\1.3.1_06\lib, comm.jar at JavaSoft\JRE\1.3.1_06\lib\ext\
and in ur code try to use it to open ur com port
public String test() {
String drivername = "com.sun.comm.Win32Driver";
try
CommDriver driver = (CommDriver) Class.forName(drivername).newInstance(); driver.initialize();
catch (Throwable th)
{* Discard it */}
drivername = "javax.comm.*";
try
CommDriver driver = (CommDriver) Class.forName(drivername).newInstance(); driver.initialize();
catch (Throwable th)
{* Discard it */}
portList = CommPortIdentifier.getPortIdentifiers();
while (portList.hasMoreElements()) {
portId = (CommPortIdentifier) portList.nextElement();
if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
if (portId.getName().equals("COM2")) {
//if (portId.getName().equals("/dev/term/a")) {
try {
serialPort = (SerialPort)
portId.open("SimpleWriteApp", 2000);
} catch (PortInUseException e) {}
try {
outputStream = serialPort.getOutputStream();
} catch (IOException e) {}
try {
serialPort.setSerialPortParams(9600,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException e) {}
int i=0;
while(true)
try {
messageString="hi";
System.out.println(i++);
outputStream.write(messageString.getBytes());
} catch (IOException e)
System.out.println(e);
messageString=String.valueOf(e);
return messageString;
and yet u need to signed the applet
1. Compile the applet
2. Create a JAR file
3. Generate Keys
4. Sign the JAR file
5. Export the Public Key Certificate
6. Import the Certificate as a Trusted Certificate
7. Create the policy file
8. Run the applet
Susan
Susan bundles the applet executable in a JAR file, signs the JAR file, and exports the public key certificate.
1. Compile the Applet
In her working directory, Susan uses the javac command to compile the SignedAppletDemo.java class. The output from the javac command is the SignedAppletDemo.class.
javac SignedAppletDemo.java
2. Make a JAR File
Susan then makes the compiled SignedAppletDemo.class file into a JAR file. The -cvf option to the jar command creates a new archive (c), using verbose mode (v), and specifies the archive file name (f). The archive file name is SignedApplet.jar.
jar cvf SignedApplet.jar SignedAppletDemo.class
3. Generate Keys
Susan creates a keystore database named susanstore that has an entry for a newly generated public and private key pair with the public key in a certificate. A JAR file is signed with the private key of the creator of the JAR file and the signature is verified by the recipient of the JAR file with the public key in the pair. The certificate is a statement from the owner of the private key that the public key in the pair has a particular value so the person using the public key can be assured the public key is authentic. Public and private keys must already exist in the keystore database before jarsigner can be used to sign or verify the signature on a JAR file.
In her working directory, Susan creates a keystore database and generates the keys:
keytool -genkey -alias signFiles -keystore susanstore -keypass kpi135 -dname "cn=jones" -storepass ab987c
This keytool -genkey command invocation generates a key pair that is identified by the alias signFiles. Subsequent keytool command invocations use this alias and the key password (-keypass kpi135) to access the private key in the generated pair.
The generated key pair is stored in a keystore database called susanstore (-keystore susanstore) in the current directory, and accessed with the susanstore password (-storepass ab987c).
The -dname "cn=jones" option specifies an X.500 Distinguished Name with a commonName (cn) value. X.500 Distinguished Names identify entities for X.509 certificates.
You can view all keytool options and parameters by typing:
keytool -help
4. Sign the JAR File
JAR Signer is a command line tool for signing and verifying the signature on JAR files. In her working directory, Susan uses jarsigner to make a signed copy of the SignedApplet.jar file.
jarsigner -keystore susanstore -storepass ab987c -keypass kpi135 -signedjar SSignedApplet.jar SignedApplet.jar signFiles
The -storepass ab987c and -keystore susanstore options specify the keystore database and password where the private key for signing the JAR file is stored. The -keypass kpi135 option is the password to the private key, SSignedApplet.jar is the name of the signed JAR file, and signFiles is the alias to the private key. jarsigner extracts the certificate from the keystore whose entry is signFiles and attaches it to the generated signature of the signed JAR file.
5. Export the Public Key Certificate
The public key certificate is sent with the JAR file to the whoever is going to use the applet. That person uses the certificate to authenticate the signature on the JAR file. To send a certificate, you have to first export it.
The -storepass ab987c and -keystore susanstore options specify the keystore database and password where the private key for signing the JAR file is stored. The -keypass kpi135 option is the password to the private key, SSignedApplet.jar is the name of the signed JAR file, and signFiles is the alias to the private key. jarsigner extracts the certificate from the keystore whose entry is signFiles and attaches it to the generated signature of the signed JAR file.
5: Export the Public Key Certificate
The public key certificate is sent with the JAR file to the whoever is going to use the applet. That person uses the certificate to authenticate the signature on the JAR file. To send a certificate, you have to first export it.
In her working directory, Susan uses keytool to copy the certificate from susanstore to a file named SusanJones.cer as follows:
keytool -export -keystore susanstore -storepass ab987c -alias signFiles -file SusanJones.cer
Ray
Ray receives the JAR file from Susan, imports the certificate, creates a policy file granting the applet access, and runs the applet.
6. Import Certificate as a Trusted Certificate
Ray has received SSignedApplet.jar and SusanJones.cer from Susan. He puts them in his home directory. Ray must now create a keystore database (raystore) and import the certificate into it. Ray uses keytool in his home directory /home/ray to import the certificate:
keytool -import -alias susan -file SusanJones.cer -keystore raystore -storepass abcdefgh
7. Create the Policy File
The policy file grants the SSignedApplet.jar file signed by the alias susan permission to create newfile (and no other file) in the user's home directory.
Ray creates the policy file in his home directory using either policytool or an ASCII editor.
keystore "/home/ray/raystore";
// A sample policy file that lets a JavaTM program
// create newfile in user's home directory
// Satya N Dodda
grant SignedBy "susan"
permission java.security.AllPermission;
8. Run the Applet in Applet Viewer
Applet Viewer connects to the HTML documents and resources specified in the call to appletviewer, and displays the applet in its own window. To run the example, Ray copies the signed JAR file and HTML file to /home/aURL/public_html and invokes Applet viewer from his home directory as follows:
Html code :
</body>
</html>
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
width="600" height="400" align="middle"
codebase="http://java.sun.com/products/plugin/1.3/jinstall-13-win32.cab#Version=1,3,1,2">
<PARAM NAME="code" VALUE="SignedAppletDemo.class">
<PARAM NAME="archive" VALUE="SSignedApplet.jar">
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.3">
</OBJECT>
</body>
</html>
appletviewer -J-Djava.security.policy=Write.jp
http://aURL.com/SignedApplet.html
Note: Type everything on one line and put a space after Write.jp
The -J-Djava.security.policy=Write.jp option tells Applet Viewer to run the applet referenced in the SignedApplet.html file with the Write.jp policy file.
Note: The Policy file can be stored on a server and specified in the appletviewer invocation as a URL.
9. Run the Applet in Browser
Download JRE 1.3 from Javasoft
good luck! [email protected]
i already give u many tips, i use 2 weeks to try this to success, hopw that u understand that, a result of success is not important, the process of how to get things done is most usefull!

Applet socket connect behaves wrong.

Hi,
I have a very strange behavior from the Socket connect method. When i run the code attached as an applet the connect returns as if the connection is established (no machine on my network with the address 12.12.12.12 and ping to 12.12.12.12 fails as expected).
When i run it from a command line (in a stadard main) the connect behaves as expected an i get an exception.
Any ideas? what am i doing wrong? (or is it a known applet behavior???)
thanks...
===========================================================
the code:
===========================================================
public void start() {
SocketAddress sockaddr = new InetSocketAddress("12.12.12.12", 16000);
Socket sock = new Socket();
try {
System.out.println("Start conn 1");
sock.connect(sockaddr, 3000);
} catch (IOException e) {
System.out.println("Connect failed");
e.printStackTrace();
return;
if (sock.isConnected()) {
System.out.println("Connected");
System.out.println("Connect succ 1");
Edited by: ohad_atia on Jun 28, 2009 12:25 AM

here is the applet start code - the rest of the methods are empty:
(no exception here - that is the problem)
      public void start() {
          SocketAddress sockaddr = new InetSocketAddress("12.12.12.12", 16000);
                 Socket sock = new Socket();
          try {
               System.out.println("Start conn 1");
               sock.connect(sockaddr, 3000);
          } catch (IOException e) {
               System.out.println("Connect failed");
              e.printStackTrace();
              return;
          if (sock.isConnected()) {
             System.out.println("Connected");
          System.out.println("Connect succ 1");
      }the code and output i got when i run it using a command line:
import java.net.Socket;
import java.net.SocketAddress;
import java.net.InetSocketAddress;
import java.io.IOException;
public class networktest {
        public static void main(String[] argv) {
                SocketAddress sockaddr = new InetSocketAddress("12.12.12.12", 16000);
                Socket sock = new Socket();
        try {
                sock.connect(sockaddr, 3000);
            } catch (IOException e) {
                System.out.println("Connect failed");
                e.printStackTrace();
                return;
            if (sock.isConnected()) {
                   System.out.println("Connected");
            System.out.print("Connect succ");
}output:
Connect failed
java.net.SocketTimeoutException: connect timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at networktest.main(networktest.java:17)
thanks for your help

Applet security connecting to hosts

it is said that unsigned applets cannot connect to hosts other than the origin host.
- By origin host, is it the host from where the html is downloaded or the host from where the jar file is downloaded?
- should the applet be connecting using the exact hostname or its ip address can also be used?
- signed applet doesnt have any of these restrictions right?
- are there any restrictions on connecting to hosts using appletcontext.showDocument? I guess no - because the page is opened in the browser and available to the applet directly. is this correct for both signed and unsigned appelts? Indirectly the data is available to the applet through live connect, what say?
Thanks.

- By origin host, is it the host from where the html is downloaded or the host from where
the jar file is downloaded?
The codebase of the applet, use this.getCodeBase() to get an URL object to cennect,
for a Socket you can use the URL object .getHost and getPort to create a Socket
allthough a socket doesn't use the browser's settings to make a connection and you
can have problems when the client uses a proxy or https.
- should the applet be connecting using the exact hostname or its ip address can also
be used?
I think it doesn't really matter but am not sure, use getCodeBase instead of hard
coding the host .
- signed applet doesnt have any of these restrictions right?
Correct, if the user trusts the applet. The user will be asked if he or she trusts the
applet.
- are there any restrictions on connecting to hosts using
appletcontext.showDocument? I guess no - because the page is opened in the
browser and available to the applet directly. is this correct for both signed and
unsigned appelts? Indirectly the data is available to the applet through live connect,
what say?
appletcontext.showDocument will open a new browser window, don't think there is
any restrictions in that except that Moz will activate the popup stopper.

Applet -ejb ; weblogic.jar

Hi,
I am trying to access EJB from an applet thro' ejb-client.jar. It works fine if I include weblogic.jar in the applet archive but it throws a corba exception if I use wlclient.jar and wljmsclient.jar instead of weblogic.jar in the archive. As weblogic.jar is too huge I want to use thin clients. Could someone help me with this exception. I am using WLS8.1_sp4; jdk 1.4.2_05 and ie6 with latest jvm. Both applet and ejb are deployed in same localhost
com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,
4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Client get called: host = localhost port = 7001
com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,
4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Creating new connection Connection[type=IIOP_CLEAR_TEXT remo
te_host=localhost remote_port=7001 state=ESTABLISHED]
com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Creating message
from stream
com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,
4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Succesfully created socket for new connection
com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Reading the mess
age fully, size =1204
com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Handling GIOP 1.
0 LocateReply
com.sun.corba.se.internal.iiop.IIOPInputStream(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Constructing IIO
PInputStream object
com.sun.corba.se.internal.iiop.IIOPInputStream(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Setting the time
stamp
com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Creating message
from stream
com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,
4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Client get called: host = 172.16.65.14 port = 7001
com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,
4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Creating new connection Connection[type=IIOP_CLEAR_TEXT remo
te_host=172.16.65.14 remote_port=7001 state=ESTABLISHED]
com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for 172.16.65.14:7001,4,ORB ThreadGroup]): Creating mess
age from stream
com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,
4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Succesfully created socket for new connection
com.sun.corba.se.internal.iiop.GIOPImpl(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,4,file:
/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): getEndpoint(IIOP_CLEAR_TEXT, 0, null)
com.sun.corba.se.internal.iiop.GIOPImpl(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,4,file:
/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): createListener( socketType = IIOP_CLEAR_TEXT port = 0 )
javax.naming.NamingException: Unhandled exception in lookup [Root exception is org.omg.CORBA.MARSHAL: vmcid: SUN minor cod
e: 217 completed: Maybe]
at weblogic.corba.j2ee.naming.Utils.wrapNamingException(Utils.java:81)
at weblogic.corba.j2ee.naming.ContextImpl.lookup(ContextImpl.java:237)
at weblogic.corba.j2ee.naming.ContextImpl.lookup(ContextImpl.java:171)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at informatics.inventory.plates.editor.EJBPlateMapDAO.<init>(Unknown Source)
at informatics.inventory.plates.editor.PlateMapEditor.init(Unknown Source)
at sun.applet.AppletPanel.run(AppletPanel.java:353)
at java.lang.Thread.run(Thread.java:534)
Caused by: org.omg.CORBA.MARSHAL: vmcid: SUN minor code: 217 completed: Maybe
at com.sun.corba.se.internal.iiop.CDROutputStream_1_0.write_wstring(CDROutputStream_1_0.java:464)
at com.sun.corba.se.internal.iiop.CDROutputStream.write_wstring(CDROutputStream.java:189)
at weblogic.corba.cos.naming.NamingContextAnyPackage.WNameComponentHelper.write(WNameComponentHelper.java:79)
at weblogic.corba.cos.naming.NamingContextAnyPackage.WNameHelper.write(WNameHelper.java:59)
at weblogic.corba.cos.naming._NamingContextAnyStub.resolve_any(_NamingContextAnyStub.java:79)
at weblogic.corba.j2ee.naming.ContextImpl.lookup(ContextImpl.java:213)
... 6 more

Hi,
I am trying to access EJB from an applet thro' ejb-client.jar. It works fine if I include weblogic.jar in the applet archive but it throws a corba exception if I use wlclient.jar and wljmsclient.jar instead of weblogic.jar in the archive. As weblogic.jar is too huge I want to use thin clients. Could someone help me with this exception. I am using WLS8.1_sp4; jdk 1.4.2_05 and ie6 with latest jvm. Both applet and ejb are deployed in same localhost
com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,
4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Client get called: host = localhost port = 7001
com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,
4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Creating new connection Connection[type=IIOP_CLEAR_TEXT remo
te_host=localhost remote_port=7001 state=ESTABLISHED]
com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Creating message
from stream
com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,
4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Succesfully created socket for new connection
com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Reading the mess
age fully, size =1204
com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Handling GIOP 1.
0 LocateReply
com.sun.corba.se.internal.iiop.IIOPInputStream(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Constructing IIO
PInputStream object
com.sun.corba.se.internal.iiop.IIOPInputStream(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Setting the time
stamp
com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Creating message
from stream
com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,
4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Client get called: host = 172.16.65.14 port = 7001
com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,
4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Creating new connection Connection[type=IIOP_CLEAR_TEXT remo
te_host=172.16.65.14 remote_port=7001 state=ESTABLISHED]
com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for 172.16.65.14:7001,4,ORB ThreadGroup]): Creating mess
age from stream
com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,
4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Succesfully created socket for new connection
com.sun.corba.se.internal.iiop.GIOPImpl(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,4,file:
/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): getEndpoint(IIOP_CLEAR_TEXT, 0, null)
com.sun.corba.se.internal.iiop.GIOPImpl(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,4,file:
/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): createListener( socketType = IIOP_CLEAR_TEXT port = 0 )
javax.naming.NamingException: Unhandled exception in lookup [Root exception is org.omg.CORBA.MARSHAL: vmcid: SUN minor cod
e: 217 completed: Maybe]
at weblogic.corba.j2ee.naming.Utils.wrapNamingException(Utils.java:81)
at weblogic.corba.j2ee.naming.ContextImpl.lookup(ContextImpl.java:237)
at weblogic.corba.j2ee.naming.ContextImpl.lookup(ContextImpl.java:171)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at informatics.inventory.plates.editor.EJBPlateMapDAO.<init>(Unknown Source)
at informatics.inventory.plates.editor.PlateMapEditor.init(Unknown Source)
at sun.applet.AppletPanel.run(AppletPanel.java:353)
at java.lang.Thread.run(Thread.java:534)
Caused by: org.omg.CORBA.MARSHAL: vmcid: SUN minor code: 217 completed: Maybe
at com.sun.corba.se.internal.iiop.CDROutputStream_1_0.write_wstring(CDROutputStream_1_0.java:464)
at com.sun.corba.se.internal.iiop.CDROutputStream.write_wstring(CDROutputStream.java:189)
at weblogic.corba.cos.naming.NamingContextAnyPackage.WNameComponentHelper.write(WNameComponentHelper.java:79)
at weblogic.corba.cos.naming.NamingContextAnyPackage.WNameHelper.write(WNameHelper.java:59)
at weblogic.corba.cos.naming._NamingContextAnyStub.resolve_any(_NamingContextAnyStub.java:79)
at weblogic.corba.j2ee.naming.ContextImpl.lookup(ContextImpl.java:213)
... 6 more

Applet-ejb; corba exception

Hi, I am trying to access EJB from an applet thro' ejb-client.jar. It works fine if I include weblogic.jar in the applet archive but it throws a corba exception if I use wlclient.jar and wljmsclient.jar instead of weblogic.jar in the archive. As weblogic.jar is too huge I want to use thin clients. Could someone help me with this exception. I am using WLS8.1_sp4; jdk 1.4.2_05 and ie6 with latest jvm. Both applet and ejb are deployed in same localhost com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class, 4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Client get called: host = localhost port = 7001 com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class, 4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Creating new connection Connection[type=IIOP_CLEAR_TEXT remo te_host=localhost remote_port=7001 state=ESTABLISHED] com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Creating message from stream com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class, 4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Succesfully created socket for new connection com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Reading the mess age fully, size =1204 com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Handling GIOP 1. 0 LocateReply com.sun.corba.se.internal.iiop.IIOPInputStream(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Constructing IIO PInputStream object com.sun.corba.se.internal.iiop.IIOPInputStream(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Setting the time stamp com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for localhost:7001,4,ORB ThreadGroup]): Creating message from stream com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class, 4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Client get called: host = 172.16.65.14 port = 7001 com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class, 4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Creating new connection Connection[type=IIOP_CLEAR_TEXT remo te_host=172.16.65.14 remote_port=7001 state=ESTABLISHED] com.sun.corba.se.internal.iiop.MessageMediator(Thread[JavaIDL Reader for 172.16.65.14:7001,4,ORB ThreadGroup]): Creating mess age from stream com.sun.corba.se.internal.iiop.ConnectionTable(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class, 4,file:/C:/projects/perforce/java/PlateMapViewer/-threadGroup]): Succesfully created socket for new connection com.sun.corba.se.internal.iiop.GIOPImpl(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,4,file: /C:/projects/perforce/java/PlateMapViewer/-threadGroup]): getEndpoint(IIOP_CLEAR_TEXT, 0, null) com.sun.corba.se.internal.iiop.GIOPImpl(Thread[thread applet-informatics.inventory.plates.editor.PlateMapEditor.class,4,file: /C:/projects/perforce/java/PlateMapViewer/-threadGroup]): createListener( socketType = IIOP_CLEAR_TEXT port = 0 ) javax.naming.NamingException: Unhandled exception in lookup [Root exception is org.omg.CORBA.MARSHAL: vmcid: SUN minor cod e: 217 completed: Maybe] at weblogic.corba.j2ee.naming.Utils.wrapNamingException(Utils.java:81) at weblogic.corba.j2ee.naming.ContextImpl.lookup(ContextImpl.java:237) at weblogic.corba.j2ee.naming.ContextImpl.lookup(ContextImpl.java:171) at javax.naming.InitialContext.lookup(InitialContext.java:347) at informatics.inventory.plates.editor.EJBPlateMapDAO.<init>(Unknown Source) at informatics.inventory.plates.editor.PlateMapEditor.init(Unknown Source) at sun.applet.AppletPanel.run(AppletPanel.java:353) at java.lang.Thread.run(Thread.java:534) Caused by: org.omg.CORBA.MARSHAL: vmcid: SUN minor code: 217 completed: Maybe at com.sun.corba.se.internal.iiop.CDROutputStream_1_0.write_wstring(CDROutputStream_1_0.java:464) at com.sun.corba.se.internal.iiop.CDROutputStream.write_wstring(CDROutputStream.java:189) at weblogic.corba.cos.naming.NamingContextAnyPackage.WNameComponentHelper.write(WNameComponentHelper.java:79) at weblogic.corba.cos.naming.NamingContextAnyPackage.WNameHelper.write(WNameHelper.java:59) at weblogic.corba.cos.naming._NamingContextAnyStub.resolve_any(_NamingContextAnyStub.java:79) at weblogic.corba.j2ee.naming.ContextImpl.lookup(ContextImpl.java:213) ... 6 more

I had the same problem and finally caught a statement in one of the docs: "To facilitate the use of IIOP, always specify a valid IP address or DNS name for the Listen Address attribute in the configuration file (config.xml) to listen for connections." I edited my config.xml file and put in the ip address of the machine running my WLS and things started working. Hope this works for you.
Regards,
Ron

Who can explain how EJB connect to Oracle9i DB with DataSource?

I have taken 4 days into this problem. I am developing EJB with J2EE1.3 and Oracle9i DB, I can connect to DB in code with DriverManager. But I want to use DataSource to connect to DB. I failed, I can not get new way to resolve it when I after try to connect with javax.sql.DataSource, oracle.jdbc.pool.OracleDataSource and oracle.jdbc.pool.OracleConnectionPoolDataSource.
I have got different Exceptions when I coding different ways:
one is:
Caught an exception.
java.rmi.ServerException: RemoteException occurred in server thread; nested exce
ption is:
java.rmi.RemoteException: nested exception is: javax.ejb.EJBException: U
nable to connect to database. com.sun.enterprise.resource.JdbcDataSource; nested
exception is:
javax.ejb.EJBException: Unable to connect to database. com.sun.enterpris
e.resource.JdbcDataSource
java.rmi.RemoteException: nested exception is: javax.ejb.EJBException: Unable to
connect to database. com.sun.enterprise.resource.JdbcDataSource; nested excepti
on is:
javax.ejb.EJBException: Unable to connect to database. com.sun.enterpris
e.resource.JdbcDataSource
javax.ejb.EJBException: Unable to connect to database. com.sun.enterprise.resour
ce.JdbcDataSource
<<no stack trace available>>
the Other is:
Caught an exception.
java.rmi.ServerException: RemoteException occurred in server thread; nested exce
ption is:
java.rmi.RemoteException: nested exception is: javax.ejb.EJBException: U
nable to connect to database. makeConnection:Io Exception: Connection refused(DESCRIP
TION=(TMP=)(VSNNUM=150999297)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4)
))); nested exception is:
javax.ejb.EJBException: Unable to connect to database. makeConnection:Io
Exception: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=150999297)(ERR=12505)(ERROR_
STACK=(ERROR=(CODE=12505)(EMFI=4))))
java.rmi.RemoteException: nested exception is: javax.ejb.EJBException: Unable to
connect to database. makeConnection:Io Exception: Connection refused(DESCRIPTION=(TM
P=)(VSNNUM=150999297)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4)))); nes
ted exception is:
javax.ejb.EJBException: Unable to connect to database. makeConnection:Io
Exception: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=150999297)(ERR=12505)(ERROR_
STACK=(ERROR=(CODE=12505)(EMFI=4))))
javax.ejb.EJBException: Unable to connect to database. makeConnection:Io Exception: C
onnection refused(DESCRIPTION=(TMP=)(VSNNUM=150999297)(ERR=12505)(ERROR_STACK=(E
RROR=(CODE=12505)(EMFI=4))))
<<no stack trace available>>
My codes related are:
private void makeConnection() throws NamingException, SQLException {
try{
InitialContext ic = new InitialContext();
OracleConnectionPoolDataSource ocpds = (OracleConnectionPoolDataSource) ic.lookup(dbName);
PooledConnection pc = ocpds.getPooledConnection();
con = pc.getConnection();
}catch(SQLException ex){
throw new SQLException("makeConnection:" + ex.getMessage());
DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
con = DriverManager.getConnection(
"jdbc:oracle:thin:@172.28.200.43:1521:shcd",
"lijun", "xiaotian"); */
public void setEntityContext(EntityContext context) {
this.context = context;
try {
makeConnection();
} catch (Exception ex) {
throw new EJBException("Unable to connect to database. " +
ex.getMessage());
I believe I set JNDI and config EJB right, because I can run it with Cloudscape DB all right.
who can tell me where is my WRONG, or tell me how to connect to Oracle9i DB?

Hi Jhlijun,
I am facing the same problem at the moment. However, I am not using a pooled connection. The following is my code. I am trying to connect a stateless session bean to an Oracle 9i database with result being fed back to a jsp page.
package Test;
import javax.naming.*;
import java.sql.*;
import java.util.*;
import javax.ejb.*;
import javax.sql.DataSource;
import javax.sql.*;
public class TestSessionEJBbean extends java.lang.Object implements javax.ejb.SessionBean
String q="Select NAMETITLE,NAMEFIRST,NAMELAST from People where PeopleRSN<100";
 protected boolean create() throws java.lang.Exception
return true;
public TestSessionEJBbean()
{ // EJB constructors don't have a server context.
private void unhandledEvent( String listenerName, String methodName, java.lang.Object event )
// method for interface javax.ejb.SessionBean
public void ejbActivate() throws javax.ejb.EJBException, java.rmi.RemoteException
// To Do
// method for interface javax.ejb.SessionBean
public void ejbPassivate() throws javax.ejb.EJBException, java.rmi.RemoteException
// To Do
// method for interface javax.ejb.SessionBean
public void ejbRemove() throws javax.ejb.EJBException, java.rmi.RemoteException
// To Do
// method for interface javax.ejb.SessionBean
public void setSessionContext( javax.ejb.SessionContext parm0 ) throws javax.ejb.EJBException, java.rmi.RemoteException
this._sessionContext = parm0; // generated helper code
// To Do
* Test Method
public String Test() throws javax.ejb.EJBException
return "Hi! I am the SessionEjbBean.";
* Session Context of this EJB.
* Set in 'setSessionContext()' before any 'ejbCreate()' is executed.
private javax.ejb.SessionContext _sessionContext;
* ejbCreate Method
public void ejbCreate() throws javax.ejb.EJBException, javax.ejb.CreateException
try {
create(); // This 'create()' is used for internal initialization.
catch( java.lang.Exception __e) {
System.err.println( __e.toString() + " " + __e.getMessage() );
// TODO: implement
* getDBConnection Method
 public sun.jdbc.rowset.CachedRowSet getDBConnection() throws javax.ejb.EJBException
 String testPrint = "Starting...";//Only to check output
 Connection conn;
 sun.jdbc.rowset.CachedRowSet crset=null;
 try {
 testPrint += "before new InitialContext()....";//Only to check output
 InitialContext ic = new InitialContext();
 DataSource ds = (DataSource)ic.lookup("java:comp/env/jdbc/coquit");
 testPrint += "before ds.getConnection()....";//Only to check output
 conn = ds.getConnection("coquit","coquit");
 testPrint += "before conn.createStatement()....";
 Statement stmt=conn.createStatement();
 testPrint += "before stmt.executeQuery(....)";
 ResultSet rset = stmt.executeQuery(q);
 testPrint += "before new sun.jdbc.rowset.CachedRowSet()";
 crset = new sun.jdbc.rowset.CachedRowSet();
 testPrint += "before crset.populate(rset)";
 crset.populate(rset);
 rset.close();
 stmt.close();
 conn.close();
 } catch (NamingException ne) {
 System.out.println("TestSessionEJBbean::getDBConnection Naming Exception " + ne);
 }catch (Exception e){
 System.out.println(testPrint+"...TestSessionEJBbean::getDBConnectionException" + e);
 System.out.println("\n\n");
 e.printStackTrace();
 return crset;

Urgent: how to run applet which connected to the servlet?

hi frends:
i have written an applet on the server side and it supposed to pass parameters to my servlet and retrieve some info from the servlet.
i put both applet and servlet under tomcat../WEB-INF/classes. but when i run the applet from the web browser, there is no response from the servlet.
could anyone help me to solve this problem?
one more thing is i know that applet is able to connect to servlet, but how about java application? is it able to do so? if yes, is it also using URLconnection as applet? and how to run it?
i will be very appreciate if anyone can help me... thanx a million.

You can connect to the servlet from an application.There's a URL class in java.net that has an openConnection method. Then cast the return to an HttpURLConnection and use setMethod to set up as a post request.This may be the default if you call setDoOutput(true) on the URLConnection. Then you'll need to get an OutputStream and write properly formatted form POST data to it. It's also possible to encode your data on the URL, even when using the POST method, and this may be easier when doing it programmatically from an application. To send a get request you can append the name-value pair at the end of the url.

Applet - EJB Connection

Similar Messages

Maybe you are looking for