Calling EJBs from Visual Basic

I've tried using SUNs EJB COM Bridge to have a VB application call an EJB
but it only works with the j2ee server and not weblogic. Does anybody know
of another product that will do the job (preferably free). I've seen
JIntegra but they want a license fee for each machine that uses it!
Stu Freeman
Laverock von Schoultz Ltd

Hello Osvaldo,
I analysed the updated tutorial you sent me, but the thing is that it doen't show how to create the DLL in LV 8.6 but only show how to accessing the DLL from VB6. My problem is really HOW TO CREATE THE DLL IN LV8.6. In the link http://zone.ni.com/devzone/cda/tut/p/id/3063 there is detailed information about how to do this in LV6.x, the problem is that I don't find the path Tools»Build Application or Shared Library (DLL) in LV8.6, I think the procedure in LV8.6 is a little bit different. Don´t you have an updated tutorial on how to build a dll in LV8.6?How could you help me?
Kind regards.
João Júnior

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Creating a DLL in Labview 8.6 and calling it from Visual Basic 6.0

Dear friends,
I need to create a DLL in Labview 8.6 and call it from Visual Basic 6.0. The system works as follows:
I made an application using Labview 8.6 + Vision Assistant 8.6 where I can obtain the x,y coordinates of a template in an certain image being captured by an USB camera. The template coordinates change every time it moves and Visual Basic 6.0 must read these x,y values in real time. I found some information in the link http://zone.ni.com/devzone/cda/tut/p/id/3925, but it works for version 6.x of Labview and 8.6 version is different. Am I in the right path? If you have an updated tutorial like the one in the link above but for Labview 8.6 It would be very nice. Please help me.
Kind regards.
João Júnior

Hello Osvaldo,
I analysed the updated tutorial you sent me, but the thing is that it doen't show how to create the DLL in LV 8.6 but only show how to accessing the DLL from VB6. My problem is really HOW TO CREATE THE DLL IN LV8.6. In the link http://zone.ni.com/devzone/cda/tut/p/id/3063 there is detailed information about how to do this in LV6.x, the problem is that I don't find the path Tools»Build Application or Shared Library (DLL) in LV8.6, I think the procedure in LV8.6 is a little bit different. Don´t you have an updated tutorial on how to build a dll in LV8.6?How could you help me?
Kind regards.
João Júnior

Type Mismatch error while calling a Java Function from Visual Basic 6.0...

Hi,
I'm having a problem in calling the Java Applet's Function from Visual Basic. First, I'm getting the handle of the Java Applet and components of it using "Document.Applets(n)" which is a HTML function. I'm calling this function from Visual Basic. My code is something like this...
' // Web1 is IE Browser in my Form.
Dim Ap,Comp
Dim Bol as Boolean
Bol = true
Ap = Web1.Document.Applets(0).getWindow() ' \\ Gets the Parent Window.
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msgbox Ap.getVisibility() ' \\ This will return a Java boolean ( true or false )
Ap.setVisibility(Bol) ' \\ Function Syntax is : void setVisibility(boolean b)
Here in my code , i'm able to call any function that which accepts Integer or String but not boolean. So, i m facing problem with Ap.setVisibility() function. It gives me a "Type mismatch error" while executing it. Can you please tell me a way to do this from Visual Basic !
I'm using Visual Basic 6.0, Windows 2000 , J2SDK 1.4.2_05.
Please help me Friends.
Thanks and Regards,
Srinivas Annam.

Hi
I am not sure about this solution. try this
Declare a variable as variant and store the boolean value in that variable and then use in ur method.
Post ur reply in this forum.
bye for now
sat

Calling a dll created with vision 7.0 from visual basic doesn't work

I created a dll using some vision 7.0 functions and Labview 7.0 environment. I call this dll from visual basic. The dll will work fine as long as I don't stop the visual basic program execution. As soon as I stop the program execution the dll will no longer work. I must reload the visual basic environment and the call to the dll will start working again. I created the exact same dll but I created it with vision 6.0 in Labview 6i environment. It works great and has no issues.
Attachments:
Test.vi ‏36 KB

Roberto N. wrote:
Thank you Jordan, I'm using Labview 7.1.
Anyway I've resolved the problem by adding the "lvanlys.dll" file (present in "..\Labview 7.1\resource\lvanlys.dll" path) as support file in the building process. Now the DLL containing the analysis functions works correctly.
Natalino Roberto
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Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

How can I get the version of the GPIB driver from Visual Basic ?

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Thanks for any solution...

Hi,
The driver should create a key in registry depending on the driver version. Check for the existance of HKEY_LOCAL_MACHINE\SOFTWARE\National Instruments\NI-488.2M\ (In my case I had a folder called 2.00).
Hope this helps out.
Best Regards,
Aaron K.
Application Engineer
National Instruments

How to set the password encrytacion a database. Accdb from Visual Basic 2010 for a report. Rpl

I want to know how to set the password encrytacion a database. Accdb from Visual Basic 2010 for a report. Rpl

You have to connect via ODBC, then use code along the lines of what is described here:
http://scn.sap.com/thread/3526924
by me on March 28 and Jan on March 29.
Also see KBA: 1686419 - SAP Crystal Reports designer does not recognize Access *.accdb file
- Ludek
Senior Support Engineer AGS Product Support, Global Support Center Canada
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Call ejb from browsers

Hello Developers!
I deployed my ejb to OAS4081. I call that
from JDeveloper so it good. But when I try
to call from applet in IExpl5 I can't
instantiate the ORB. I've got a com.ms.security.SecurityException : oracle.oas.orb.CORBA.ORB.init
I coded the CLASSPATH(oasoorb(yoj),client,
ejbapi...) perfectly, I think.
If anybody could help, please...
Thanx!

Hi there,
          I saw someone on this group had a problem to locate proper classpath
          to call EJB from JSP. I thought if you call EJB from classpath, you are
          calling the bean. But you loss all the EJB functions. To be able to utilize
          EJB features like object pooling. You need to call it from Weblogic server
          using url/jndi, not from the jar directly.
          Any comment? Am I right?
          BTW, my question about calling EJB from JSP means calling through URL,
          not a local path.
          Thank you
          >-------------------------------------------------------------------->
          Jim wrote in message <[email protected]>...
          >Hi there,
          > Can I call EJB from JSP? Is there a particular security setting or
          >concern for Weblogic? Is there an coding example?
          >
          >Thank you
          >
          >

Calling EJB from Java Stored Procedures

Hi,
I am trying to call an Enterprise Java Bean from stored procedure. This stored procedure calls a java program. As long as it is a simple java program it works fine and loadjava.exe does not give any problem (neither compile-time nor run-time).
It is not working when I am trying to call EJB from it. It is giving compile-time error.
If anybody has implemented the same please suggest how to go forward.
thanks in advance,
Shashank Agarwal

I tried the same thing without any luck. I assume you are using OC4J for your EJB ...
The compiling issue may be because you don't have the classes in your EJB client jar loaded into the database. Once those classes are loaded, you should loadjava without any problem.
However, you won't be able to call the EJB server because the EJB client (your Java code in the DB) will need the OC4J environment (oc4j.jar). I have tried to load oc4j.jar into the DB as well, and that was a big mess and nothing worked. My DB is 8.1.7, maybe the new 9i have OC4J libs bundled?!?
I looked around and only found 2 alternatives:
1. Write a JSP page that acts like an EJB client, then use URLConnection in your DB java code to send params to the JSP for it to invlode the EJB
2. Replace the JSP with RMI code, and use RMI instead of URLConnection in your DB code to invloke the EJB client.
If you find any other solution, please share it here.
Good luck!
Hi,
I am trying to call an Enterprise Java Bean from stored procedure. This stored procedure calls a java program. As long as it is a simple java program it works fine and loadjava.exe does not give any problem (neither compile-time nor run-time).
It is not working when I am trying to call EJB from it. It is giving compile-time error.
If anybody has implemented the same please suggest how to go forward.
thanks in advance,
Shashank Agarwal

How to connect to oracle database from visual basic 2010 express edition

I have installed visual basic 2010 express edition on windows xp. But visual basic 2010 express edition supports Microsoft sql server database file,Microsoft sql server compact 3.5, Microsoft access database file. I want to connect to oracle database from visual basic 2010 express edition. So what drivers are required and how to do connectivity?

Hello,
I wasn't clear on what you were using to make the connection. I had a look in Visual Studio 2010 (don't have express to test sorry).
I think you mean the Data Sources available under the menu Data-> Datasources. this seems to match the description you give when I
look at the list of datasource options.
In here you can make ODBC connections via the Microsoft .net Data Provider .
If you select ODBC as a datasource you can see listed the DSN's you created - for example I see 2 which use the Oracle ODBC driver.
This assumes you installed an Oracle Client + the oracle version of the ODBC driver (comes with the oracle client).
Once you created a server connection then you should see it in the server explorer.
You can also download the Oracle Developer Tools for Visual Studio which is an add on for VS.
** I suspect this is only for VS 2010 and I didn't see that Express was supported.
http://www.oracle.com/technetwork/developer-tools/visual-studio/overview/index-097110.html
Let me know if that helps.
John

Calling EJB from other EJB on other J2EE Server

Can I call EJB from other EJB on other J2EE Server
Servers - Websphere 5.0
Do i require home & remote interface of that ejb on client side also
Help me, please

the problem is actually i require that is specific to websphere
for example i want to call a method ion that ejb
say my ejb name is myejb
so the normal way i should call is
InitialContext initialContext = new InitialContext();
Object homeObject = initialContext.lookup("ejb/MyEjbHome");
MyEJBHome myEJBHome =(MYEjbHome )javax.rmi.PortableRemoteObject.narrow(homeObjectMYEjbHome.class);
myEJB = lSHome.create();
myEJB.someMethod();
but here i am having class for home and remote available
now if other app server i am not having this classes then what to do

Calling EJB from from a client app

Hi all,
I am trying to call an EJB component from portal. The example EJB I have taken is from SDN Bonus Calculator example - Application Server/Web Dynpro/Samples and Tutorials/Using EJBs (20)
I deployed the EAR file - no issue
I wrote the following code in a client app and trying to connect to the EJB remotely.
          try {
               java.util.Properties properties = new Properties();
               properties.put(Context.INITIAL_CONTEXT_FACTORY, "com.sap.engine.services.jndi.InitialContextFactoryImpl");
               properties.put(Context.PROVIDER_URL, "ux0800:55304");
               InitialContext ctx = new InitialContext(properties);
               //InitialContext ctx = new InitialContext();
               // get ejb home
               home =
                    (BonusCalculatorLocalHome) ctx.lookup(
                         "localejbs/MySessionBean");
               theCalculator = home.create();
          } catch (Exception namingException) {
               namingException.printStackTrace();
I get the following error
javax.naming.NoInitialContextException: Cannot instantiate class: com.sap.engine.services.jndi.InitialContextFactoryImpl [Root exception is java.lang.ClassNotFoundException: com.sap.engine.services.jndi.InitialContextFactoryImpl]
     at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
     at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
     at javax.naming.InitialContext.init(Unknown Source)
     at javax.naming.InitialContext.<init>(Unknown Source)
     at com.sap.bonus.calculation.sessionBean.MyCommandBean.<init>(MyCommandBean.java:27)
     at com.sap.bonus.calculation.sessionBean.MyCommandBean.main(MyCommandBean.java:68)
Caused by: java.lang.ClassNotFoundException: com.sap.engine.services.jndi.InitialContextFactoryImpl
     at java.net.URLClassLoader$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClassInternal(Unknown Source)
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Unknown Source)
     at com.sun.naming.internal.VersionHelper12.loadClass(Unknown Source)
Any clue will be appreciated.
thnx

Hi Sabbir,
Following code works for me in calling EJB from normal java application. Did you added the jar files to your application?. see the required jar files in end of code.
Create simple java applcation do the following steps:
Give JNDI name to the EJB(HelloJNDI)->Add the HelloEJB to HelloEAR ->deploy
Proxy Program to call ejb:
import javax.naming.Context;
import javax.naming.InitialContext;
import com.sample.Hello;
import com.sample.HelloHome;
public class HelloTest {
     public static void main(String[] args) {
                   Hello remote = null;
                  try {
                    Context ctx = new InitialContext();
                    HelloHome home = (HelloHome) ctx.lookup("HelloJNDI");
                    remote = home.create();
                    String result = remote.hello();
                    System.out.print("Result:" + result);
                     } catch (Exception e) {
                            System.out.println("Exception:" + e.getLocalizedMessage());
1. Go To Run > Java Application ->New->select your project and select your main class(java program from which your going to call EJB)
2. Click next tab ->(x)=Arguments
paste the following code in VM Arguments
-Djava.naming.factory.initial=com.sap.engine.services.jndi.InitialContextFactoryImpl -Djava.naming.provider.url=localhost:50104
replace the server IP address with your server IP address where your ejbs are running.
Under Class path settings for the program put the following jar files.
You can search for them from net weaver soruce folders
or copy from D:\usr\sap\J2E\JC01\j2ee\j2eeclient
ejb20.jar
logging.jar
exception.jar
sapj2eeclient.jar
Add Corresponding ejb.jar
and RUN >>>
this makes testing of your client programs easier, you can find the error trace on which line and saves lot of time.
Regards, Suresh

Calling EJB from app client

Hello, everybody,
I'm very new at EJB and I'm trying to learn it.
I have created Enterprise Application using Netbeans IDE, I have EJB and APP client. What I want is to connect to my MySql database and get some info from table.
For e.g. Login and Password.
How can I call EJB from my client app which connects to my database and gets information I need?

What server you are using?
if you use jboss AS ,here is a simple Main class how to connect EJB and access ejb methods:
package com.david.ejb.client;
import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;
import com.david.ejb.domain.Person;
import com.david.ejb.domain.PersonRemote;
public class Main {
     public static void main(String[] args) {
          try {
               Context ctx = getInitialContext();
               Object obj = ctx.lookup("PersonSessionRemote/remote");
            PersonRemote pr=(PersonRemote)PortableRemoteObject.narrow(obj, PersonRemote.class);
            Person p=new Person();
            p.setName("david");
            pr.addPerson(p);
            pr.findPerson(1);
               // System.out.print(br.find(pk).getAuthor_name());
          } catch (Exception ex) {
               ex.printStackTrace();
     private static Context getInitialContext() throws NamingException {
          Properties p = new Properties();
          p.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.NamingContextFactory");
          p.setProperty(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces");
          p.setProperty(Context.PROVIDER_URL, "jnp://localhost:1099");
          return new InitialContext(p);
}Person is ant @Entity and PersonRemote is remote interfaces, to connect database you have to make datasource file at jboss-4.2.3.GA\server\default\deploy
simle mysql-ds.xml looks like this:
datasources>
   <local-tx-datasource>
      <jndi-name>some name</jndi-name>
      <connection-url>jdbc:mysql://localhost:3306/dbname</connection-url>
      <driver-class>com.mysql.jdbc.Driver</driver-class>
      <user-name>root</user-name>
      <password>root password</password>
      <min-pool-size>5</min-pool-size>
      <max-pool-size>100</max-pool-size>
      <idle-timeout-minutes>15</idle-timeout-minutes>
      <exception-sorter-class-name>com.mysql.jdbc.integration.jboss.ExtendedMysqlExceptionSorter</exception-sorter-class-name>
      <valid-connection-checker-class-name>com.mysql.jdbc.integration.jboss.MysqlValidConnectionChecker</valid-connection-checker-class-name>
   </local-tx-datasource>
</datasources>also at resources/META-INF directory you must have persistence.xml like this
<persistence>
     <persistence-unit name="SimpleEjb">
          <jta-data-source>java:/some name</jta-data-source>
          <properties>
               <property name="hibernate.hbm2ddl.auto" value="update" />
               <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
               <property name="hibernate.show_sql" value="true"/>
               <property name="hibernate.format_sql" value="true"/>
          </properties>
     </persistence-unit>
</persistence>

ActiveMovie Control,Translating ActiveX calls from Visual Basic into Labview

Hello,
I want to use DirectX to display a movie. In the attached file is a Visual Basic example
which I tried to translate into Labview.
To play the movie IMediaControl from ActiveMovie control type library Version 1.0 C:\WINDOWS\system32\Quartz.dll) is used.
To display the current Position I tried to wire the IMediaPostion. But I have no idea how to implement this in the Block Diagram.
After opening it the following message is shown.
Error 3005 occurred at Automation Open: Object specified is not creatable in Play Movie Current Possition.vi
Attachments:
Play_Movie_Current_Possition.vi ‏48 KB

Hello Joe,
the Windows Media Player has a lot of overhead. I also found it difficult to deal with the different Versions.
I want to display data in a graph and show the connected video frame in a separate window.
I used the QuartzTypeLib because it is on every Windows Computer and is easy to code in VB.
With one call I can start the video in Labview., but I find no way to wire the current position. I do not really understand how ActiveX is implemented in Labview. I attached a LV 7.0 vi. I hope you can open it.
Tiemo
Attachments:
Play_Movie_Current_Position.vi ‏63 KB

Help me plz: Connect to tuxedo from visual basic 6.0 client application

Hello everyone,
i have a big problem
i try to connect my visual basic application 6.0 to the tuxedo, but i dont know how to use tpinit and tpcall in vb environnement.
that my code:
Private Declare Function tpinit Lib "C:\OracleHome\tuxedo11gR1\bin\wtuxws32.dll" _
(ByVal vlTpInfo As Long) As Integer
Private Declare Function TpTerm Lib "C:\OracleHome\tuxedo11gR1\bin\wtuxws32.dll" Alias "tpterm" () As Integer
Private Declare Function TpCall Lib "C:\OracleHome\tuxedo11gR1\bin\wtuxws32.dll" Alias "tpcall" _
(ByVal vsServiceName As String, ByVal vlBufPtr As Long, ByVal vlBufLen As Long, _
ByRef rlReplyBufPtr As Long, ByRef rlReplyBufLen As Long, ByVal vlFlags As Long) As Integer
Private Declare Function TpAlloc Lib "C:\OracleHome\tuxedo11gR1\bin\wtuxws32.dll" Alias "tpalloc" _
(ByVal vsTpType As String, ByVal vsTpSubType As String, ByVal vlSize As Long) As Long
Private Declare Sub TpFree Lib "C:\OracleHome\tuxedo11gR1\bin\wtuxws32.dll" Alias "tpfree" (ByVal vlBufPtr As Long)
Option Explicit
Type tpinfo_type
username As String
cltname As String
passwd As String
flags As Long
datalen As Long
data As String
End Type
Dim tpinfo As tpinfo_type
tpinfo.username = "cajat05"
tpinfo.passwd = "cajat05"
tpinfo.cltname = "VB6"
tpinfo.flags = 110
tpinfo.data = "NMLRS 55502022"
tpinfo.datalen = 14
Dim ret_init As Integer
Dim ret_tpalloc As Long
ret_tpalloc = TpAlloc("tpinfo", "", 9000)
MsgBox "ret_tpalloc = " & ret_tpalloc
'ret_init = tpinit(900)
'MsgBox "ret_init = " & ret_init
Dim s As String
If ret_init = 0 Then
msgbox "good"
Else
msgbox "not good"
End If
Can any one send me the code he made for a similar case ?
Thank you in advance.
Edited by: user3465258 on 2 août 2010 14:57
Edited by: user3465258 on 2 août 2010 15:44
Edited by: user3465258 on 2 août 2010 18:00

As an alternative you may want to consider writing a "C" DLL that is callable from VB. The DLL would make the Tuxedo "tp" calls and check all the return codes and the functions defined in the DLL would simplify the interface to VB. I have done this successfully in the past.
Harvey

Can not select the VISA library (visa32.dll) as a reference from Visual Basic.

I have a copy of Labview base package version 5.1.1 and Microsoft Visual Basic 6.0 in my PII 333 128M PC. I like to use the NI-VISA feature to develope my own testing program by using Visual Basic. However, the NI-VISA library (i.e. visa32.dll) can not be found from the Visual Basic reference library.

Go PROJECT | REFERENCES menu. In the list, look for "VISA library".
If the list does not show it, then BROWSE the visa32.dll located in the
WinNT\SYSTEM32 folder.
If the VISA library is earlier than V2.x, there is no TypeLib supported.
Makoto
"rfan99" wrote in message
news:506500000008000000B6180000-984882144000@quiq.com...
> I have a copy of Labview base package version 5.1.1 and Microsoft
> Visual Basic 6.0 in my PII 333 128M PC. I like to use the NI-VISA
> feature to develope my own testing program by using Visual Basic.
> However, the NI-VISA library (i.e. visa32.dll) can not be found from
> the Visual Basic reference library.

Calling EJBs from Visual Basic

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