Problem importing java bean model

I had importing a lot of classes from my bussiness model but I have some problem with some classes. Those classes uses others from external jars, like common collection.
I imported common-collection.jar to wd project, but I got the same error. Is posible use external classes in my model? How can I import it? (external jars)

Hi,
You have to create a DC of type extyernal library.
And paste the external library in the libraries.
And craete public of both types SDA & API.
Right click on the pasted jars in the libraries folder.
Right click on the jar>Development Component->Add to public part(Create a one with API radio button selected).
Repeat the same step selecting SDAs radio button.
Now add the public part created by you in the Web dynpro DC ur working .
Thanks & Regards,
Lokesh

Similar Messages

Importing Java Bean Model in Webdynpro Development Component

Hi All,
Is there any simple tutorial, example to import java bean model in webdynpro development component.
I am using NWDS 7.0 SP14 and WAS 7.0.
it really helps if you can provide simple EJB as a development component with details how to create a public part and using this bean as java bean model in Webdynpro development component.
what are the steps to be followed with precautions
Thanks in Advance,
Murali

Hi,
[Using the Java Bean Model in Web Dynpro|https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/4072c0d0-c21e-2b10-ab84-e2c183d355de]
[Using EJBs in Web Dynpro|https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/1f5f3366-0401-0010-d6b0-e85a49e93a5c]
you will get more if you search in the forum.
more help on EJB's
Re: Help needed in EJB
http://help.sap.com/saphelp_nw70/helpdata/EN/19/f9bc3d8af79633e10000000a11405a/frameset.htm
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/70929198-0d36-2b10-04b8-84d90fa3df9c
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/1f5f3366-0401-0010-d6b0-e85a49e93a5c
PradeeP

Import Java Bean model in Web dynpro DC

Hi all,
I have created the following DC's on a track:
1. EMPDic (Type: Dictionary) - DC that contains the database table.
2. EMPEjb (Type J2EE) - DC that contains the EJBs that have business logic. Created a public part EMPpp that containd the bean classes.
3. EMPEar (Type J2EE) - DC that contains the EMPEjb module.In Used Dcs added EMPpp
4. EMPCmd (Type: Java) - DC that acts as the command bean.
Created 2 public parts 'compile'(Type:compilation) and 'deploy' (Type:assembly). In Used DCs added EMPpp.
5. EMPWd (Type: Webdynpro) - DC that will contain the Java Bean Model and the application. In Used DCs added 'compile' and 'deploy'.
Q1.) Now when i try to import the Java bean model by selecting the radio button "public parts of used DCs" and look at the dropdown, i am not able to see any of the jar's related to my command bean DC.
If i select the radio button "project(source folder)" and click Next it says 'No JavaBeans for import'. Am i missing something?
Q2) Could someone tell me the exact steps from pt. 4 onwards. ie. whether it is necessary to create the 2 public parts for EMPCmd DC and what should it contain.
Thanking you in advance.

Hi Melwyn,
check the NWDI tutorial, it will help you:
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/c0b53558-6df6-2910-cfbf-a63316bb0fad
kind regards
Stefanie

Importing java Bean Model

hai ,
am new to webdynpro for java ... Am trying to import ejb bean jar to web dynpro ..
Steps as follows
i) copy the bean jar to wd project lib folder
ii) Set classpath
SampleWD - > Model
Model -> create model
Model name : Samplemodel
Model package : com.sample
Local jar file : C:\sap\workspace\SampleWD\lib\addbean.jar -- getting error in this step as Invalid Class - java bean not available for import
can anybody help me ..
Thanks in advance...
regards,
Krish

Hi Krish,
In addition to Madhu's suggestion,
As per the Java Bean Model creation steps, you will need to add the Commanad Bean JAR too in your Project, and while creation of Model, you need to select this Command Bean JAR and not the Bean Project JAR.
Regards,
Alka.

Importing Java Bean Model (Command Bean) with Session Bean

Hello all,
I'm trying to import a CommandBean as a Java Bean Model in WebDynpro but I'm prompted with an error indicating that I cannot import the EJB (Session Bean) DC that is being accessed by my CommandBean - hence failing to import the CommandBean DC as well.
How do I import this?
Help please.
-Regards,
Jan

HI,
just add ejb20.jar as an external jar in your WD project.

Expose EJB through Java Bean model importer in Web Dynpro

Hi,
I am planning to expose EJB like following:
1. Create Stateless session bean as a façade for DAO access.
2. Create DAO to access database. In my case is Oracle DB
3. Create Java Bean to encapsulate session bean
4. Import java bean model to web dynpro
Few of my business method return the object array e.g. Customer[] which contains all properties of customer, and getter, setter.
Has anyone done this before? Is there any sample code?
Best Regards,
Zhang Yan

Hi
I think u can refer to the following link
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webas/java/simple java bean generator for database.pdf
Thought this link is also Useful
Creating and Deploying Web Services for an EJB
Wishes
Krishna kanth

How can I include Java Bean model into the model outside the component

Hi All,
I am new to SAP portal. I wanted to create a bean for storing the data and to include that into the application model.
Please help me with an example .
Regards,
Saroj

Hi,
Check these blogs.
The specified item was not found.
Importing Complex JavaBean model into WebDynpro by creating relationships for the model classes
JavaBean Model Import: when it really works
Issue in Importing Java Bean Model
Regards,
Harini S
Consider rewarding points for helpful answers. Post this thread in WD forums for more results.

Diffrence b/w Deploy Time & Design time in Java bean model

Hi all,
I have craeted a model using java bean.
create model->import java bean model->Add JAR->browse the jar.
There i have got two Radio Buttons
Design Time
Deploy Time
I have worked with this two i have not observed any difference.
Can anyone give me some idea about this.If possible with an example to?
Thanks & Regards,
Lokesh.

HI Lokesh,
The basic difference between design time and deploy time is. design time jars are only used when building your aplication and considered to be present already on server. and at runtime application refer to it..
while if you keep deploy time, then the application itself keeps that jar file with him and at runtime it refers to it.
i.e. application deploy that jar file on server.
When you run an application, application need all its dependencied to be present in webdynpro container of server.
your javabean model needs those jar files at server. so when you chose deploy time. it personly deploy that file on server.
Iif you keep it as design time then. then you will be able to build it.
but if those jar files are not present at the server then your application will not get deployed.
e.g.
let A & B are your two applications and they need xx.jar file of a EJB which is created by you to create a javabean model.
now as this xx.jar file is not present at server.
1. when you create model for A. Keep it as deploy time.
as application A deploy that xx.jar file on server. B can refer it directly
2._when you create model for B keep it as design time._

Complex Java Bean Model in WD

I've revised the question.. to make it more simple.
I have 2 wrapper classes, the first wrapper HAS the second wrapper as an object.
When importing the Java Bean Model in WebDynpro, it seems okay - did the context binding, etc. -- until I did an "Apply Template" (as form) on the layout based on the CommandBean (which has the wrapper class).
Now, the fields are not active fields.. I can't change the cardinality -- and I have played around with the relations of the model classes with each other.
Nothing seems to work
Please help.
Edited by: Jan Michael Jaudian on Oct 8, 2008 8:07 AM

problem solved.
forgot to completely bind inner nodes.
developers who need more info, do post here so I can help out in any way I can.
Cheers!

Java Bean Model

Is it possible to create a simple Java Bean (not EJBs) that connect to the data base where I can read/write to it?? And I want to hook it up to Web dynpro (import a java bean model).
Please help!
I have checked countless threads and tutorials, and am unable to put the pieces together.

Hi Sana,
I think following links definitely help you to answer your queries
PPt :-
FEATURED EVENTS
Demo link :-
FEATURED EVENTS
Best Regards,
Anuj

Calling Portal Service using result as Java Bean Model impossible?

Hello folks,
we try to achieve to call a portal service (working) which gives as a result a list of object of type com.foo.Report. We want to make use of this class as a model class, so we have the class as a model node in the context. The class itself is part of the service DC.
Unfortunately at run time it gives us a NoClassDefFound Exception of com.foo.Report.
As the com.foo.Report is part of the same DC as the service, it is no option to add the PAR public part to the used DCs of the WD DC because then there is this type conflict when we call the service (service look up). Or am I wrong and this is the way to do it? I mean I struggled quite a while to get the service look up right and needed to remove all the PAR/lib used DCs from the used DCs of the WD Project, when I got it working this Model error came up. I also tried to put the Model class in a separate DC but that caused the same error.
how is it possible to call a Portal service from WD and using it's return vale as a Model class
our system iis 7.0.17
best
Stefan

Hi,
Refers the following docs..
EJBs in Web Dynpro Application Using Wrapper Class
Here Java Bean Model used in web dynpro.
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/00be903b-8551-2b10-c28a-8520400c6451
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/1f5f3366-0401-0010-d6b0-e85a49e93a5c
Accessing database table using EJB and web dynpro
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/70929198-0d36-2b10-04b8-84d90fa3df9c
Oracle Connectivity with EJB using WebDynpro Application
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/wdjava/oracle%2bconnectivity%2bwith%2bejb%2busing%2bwebdynpro%2bapplication
Hope it will help u.
thanks
Abhilasha

Simple Java Bean Model in Wed Dynpro

Hello All,
I have to develop a WD Java application with an Oracle DB as the backend. To application was designed to abstract the backend interaction into a Java bean model. The data connection and retrieval was successful. To move the data to the context following steps were performed:
1. Create a java class with the variables to be used as context in the application. Ex: Name, Subject, Email
2. On interting the ResultSet, set the values to the variables.
But, only the last row of data is retained. We tried to use array but have not been able to move the ste of values to the context.
Request your help in this regard to store the set of values into the context.
Thank you.

Hi,
It looks like you are overwriting the same context element when populating it with the values from the resultset.
Make sure you create every time a new context element and add it to the context root.
while (rs.hasNext()) {
    ContextElement elem = new ContextElement(); // or something simular appropiate to your element
    elem.setName(rs.next().getName());
    contextRootNode.addElement(elem);
Hope this helps a little.
Regards,
Alain

Problem with java beans and jsp on web logic 6.0 sp1

          HI ,
          I am using weblogic6.0 sp1.
          i have problem with jsp and java beans.
          i am using very simple java bean which stores name and email
          from a html form.
          but i am getting following errors:
          Full compiler error(s):
          D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
          cannot resolve symbol
          symbol : class userbn
          location: class jsp_servlet._savename2
          userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
          ^
          D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
          cannot resolve symbol
          symbol : class userbn
          location: class jsp_servlet._savename2
          userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
          ^
          D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:94:
          cannot resolve symbol
          symbol : class userbn
          location: class jsp_servlet._savename2
          ud = (userbn) java.beans.Beans.instantiate(getClass().getClassLoader(),
          "userbn"); //[ /SaveName2.jsp; Line: 7]
          ^
          3 errors
          in which directory should i place java bean source file(.java file)
          here is my jsp file:
          <%@ page language = "java" contentType = "text/html" %>
          <html>
          <head>
          <title>bean2</title>
          </head>
          <body>
          <jsp:usebean id = "ud" class = "userbn" >
          <jsp:setProperty name = "ud" property = "*" />
          </jsp:usebean>
          <ul>
          <li> name: <jsp:getProperty name = "ud" property = "name" />
          <li> email : <jsp:getProperty name = "ud" property = "email" />
          </ul>
          </body>
          <html>
          here is my bean :
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          import java.io.*;
          public class userbn implements Serializable
               private String name ;
               private String email;
               public void setName(String n)
                    name = n;
               public void setEmail(String e)
                    email = e;
               public String getName()
                    return name;
               public String getEmail()
                    return email;
               public userbn(){}
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          pls help me.
          Thanks
          sravana.


          You realy can do it like Xiang says, but the better way is to use packages. That's
          the way BEA is designed for. If you use packages you can but your bean classes
          in every subfolder beneath Classes. Here for example we have the subfolders test
          and beans:
          You have to declare the package on top of your Bean Source Code:
          package test.beans;
          In your JSP you don't need the import code of Xiang. You only have to refer the
          path of your bean class:
          <jsp:useBean id="testBean" scope="session" class="test.beans.TestBean" />
          There are some other AppServers that only can deploy Java Beans in packages. So
          if you use packages you are always on the right side.
          ciao bernd
          "sravana" <[email protected]> wrote:
          >
          >Thank you very much Xiang Rao, It worked fine.
          >Thanks again
          >sravana.
          >
          >"Xiang Rao" <[email protected]> wrote:
          >>
          >><%@ page import="userbn" language = "java" contentType = "text/html"
          >>%> should
          >>work for you.
          >>
          >>
          >>"sravana" <[email protected]> wrote:
          >>>
          >>>HI ,
          >>>
          >>>I am using weblogic6.0 sp1.
          >>>
          >>>i have problem with jsp and java beans.
          >>>
          >>>i am using very simple java bean which stores name and email
          >>>
          >>>from a html form.
          >>>
          >>>but i am getting following errors:
          >>>
          >>>________________________________________________________________
          >>>
          >>>Full compiler error(s):
          >>>D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
          >>>cannot resolve symbol
          >>>symbol : class userbn
          >>>location: class jsp_servlet._savename2
          >>> userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
          >>> ^
          >>>D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
          >>>cannot resolve symbol
          >>>symbol : class userbn
          >>>location: class jsp_servlet._savename2
          >>> userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
          >>> ^
          >>>D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:94:
          >>>cannot resolve symbol
          >>>symbol : class userbn
          >>>location: class jsp_servlet._savename2
          >>> ud = (userbn) java.beans.Beans.instantiate(getClass().getClassLoader(),
          >>>"userbn"); //[ /SaveName2.jsp; Line: 7]
          >>> ^
          >>>3 errors
          >>>
          >>>____________________________________________________________
          >>>
          >>>in which directory should i place java bean source file(.java file)
          >>>
          >>>here is my jsp file:
          >>>--------------------------------------------------------
          >>>
          >>><%@ page language = "java" contentType = "text/html" %>
          >>><html>
          >>><head>
          >>><title>bean2</title>
          >>></head>
          >>><body>
          >>><jsp:usebean id = "ud" class = "userbn" >
          >>><jsp:setProperty name = "ud" property = "*" />
          >>></jsp:usebean>
          >>><ul>
          >>><li> name: <jsp:getProperty name = "ud" property = "name" />
          >>><li> email : <jsp:getProperty name = "ud" property = "email" />
          >>></ul>
          >>></body>
          >>><html>
          >>>
          >>>-------------------------------------------------------------
          >>>
          >>>here is my bean :
          >>>
          >>>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          >>>
          >>>import java.io.*;
          >>>
          >>>public class userbn implements Serializable
          >>>{
          >>>
          >>>     private String name ;
          >>>
          >>>     private String email;
          >>>
          >>>     public void setName(String n)
          >>>     {
          >>>
          >>>          name = n;
          >>>     }
          >>>
          >>>     public void setEmail(String e)
          >>>     {
          >>>
          >>>          email = e;
          >>>     }
          >>>
          >>>     public String getName()
          >>>     {
          >>>
          >>>          return name;
          >>>     }
          >>>
          >>>     public String getEmail()
          >>>     {
          >>>
          >>>          return email;
          >>>     }
          >>>
          >>>     public userbn(){}
          >>>}
          >>>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          >>>
          >>>pls help me.
          >>>Thanks
          >>>sravana.
          >>>
          >>
          >

Need help for traping imported java bean exception

hi everyone
i have imported a java bean into my forms 9i using java importer utility which tries to rename a file on a give path(bean works fine when executed through sql client).
i have problem when called from when button pressed trigger, it throws me an ("FRM-40735 and ORA-105101 NON ORACLE EXCEPTION") error.
i have imported java.lang.exception class and constructed an exception handler to trap java exception in the trigger
as
EXCEPTION
     WHEN ORA_JAVA.JAVA_ERROR then
          message('Unable to call out to Java, ' ||ORA_JAVA.LAST_ERROR);
          --check for ORA-105101
     WHEN ORA_JAVA.EXCEPTION_THROWN THEN
          ex:= ORA_JAVA.LAST_EXCEPTION;
          message('Java Exception --: '||BIException.toString(ex));
          ORA_JAVA.CLEAR_EXCEPTION;
     WHEN OTHERS THEN
          message('error :'||SQLERRM);
when i imported java.lang.exception i did not find any wrapper pl/sql function or procedure declared to read or get the error messages except for the functions named "new" ,my exception handler failed.
so i tried with BIException which also fails to trap the error i have no idea about BIException and its usage with in forms ,Please do help me out with this issue ASAP.
thanks in advance
Rgds
yash

Hi,
don't understand what the BIException is supposed to do in your code, can you try
     WHEN ORA_JAVA.EXCEPTION_THROWN then
     ex := ORA_JAVA.LAST_EXCEPTION;
     message('Exception: '||Exception_.toString(ex));
where Exception_ is the imported java.lang.Exception package.
Frank

Java Bean Model in WebDynpro

Hi,
I have build am Java Bean Class which I use in a WebDynpro Model. In this Java Bean Class i want to call a remote method via RMI.
     public String calculate(int aFirst, int aSecond)
          float theResult = 0;
          try {
               Properties p = new Properties();
               p.put(Context.INITIAL_CONTEXT_FACTORY, "com.sap.engine.services.jndi.InitialContextFactoryImpl");
               p.put(Context.PROVIDER_URL, "nitse06u:50004");
               p.put(Context.SECURITY_PRINCIPAL, "Administrator");
               p.put(Context.SECURITY_CREDENTIALS, "admin");
               Context initialContext = new InitialContext(p);
               Object ob = initialContext.lookup("Calculator");
               CalculatorHome home = (CalculatorHome) PortableRemoteObject.narrow(ob, CalculatorHome.class);
               Calculator theCalculator = home.create();
               theResult = theCalculator.add(aFirst, aSecond);
          catch (Exception ex)
               ex.printStackTrace();
          return new Integer(((new Float(theResult))).intValue()).toString();
At runtime following exception occurred.
java.lang.NoClassDefFoundError: com.sap.examples.calculator.CalculatorHome
     at com.sap.calculator.helper.CalculatorHelper.calculate(CalculatorHelper.java:109)
     at caom.sap.webdynpro.CalculatorComponentView.onActionCalculate(CalculatorComponentView.java:150)
     at caom.sap.webdynpro.wdp.InternalCalculatorComponentView.wdInvokeEventHandler(InternalCalculatorComponentView.java:144)
     at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.invokeEventHandler(DelegatingView.java:87)
     at com.sap.tc.webdynpro.progmodel.controller.Action.fire(Action.java:67)
     at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.handleAction(WebDynproMainTask.java:100)
     at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.handleActionEvent(WebDynproMainTask.java:299)
     at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:635)
     at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:59)
How can I add the home and remote classes to my webdynpro?
Regards
Richard

You could try to put the ejbClient.jar (the jar file that was generated in your ejb project) into the lib directory of your webdynpro project.
Everything in the lib directory is deployed with the Webdynpro application.
To see the lib directory you have to change to the navigator view in the IDE.
It is right under the Project root.
If you have Development Component Projects this is a different story. You can add the public part in your ejb DC (of type assembly) to the DC usages in the WebDynpro DC. The type assembly means then, that the jar file from the ejb project is taken and packaged with the WebDynpro DC. But watch out. For this to work you have to do a real DC build and a real DC deploy not the deploy and run function. Hope this helps.

Problem importing java bean model

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