Calling ABAP BAPIs from a JAVA client - Web Services vs. JCo

Hi All,
When calling BAPIs from a JAVA client, what are the pros/cons for making the call employing JCo vs web service technologies. I understand that using SOAP would play better into the SOA theme and that there are nice tools to generate a WSDL document from a BAPI. Aside from the obvious, are there any performance considerations and/or other major pros/cons to each
Thanks,
Mark

Hi Mark,
Have you got any information on this. If you have any information on this pls forward to me at <b>[email protected]</b> I am also having this confusion. My question is a bit deviating from your point. If we use XI when developing WDJs with WS, will it help in improving performance and maintenance.will it give any advantage if I use XI with BAPIs to connecto backend from WDJ apps. I got this confusion, becasue of a requirement to develop WDJ apps that will be accessed by 50,000 users. Somebody told client that use of XI willimprove performance.
Any help is greatful
Regards
Ravindra
Message was edited by:
Ravindra Babu Tanguturi

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private String m_propFile = DEF_PROPFILE;
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*Trademark, 2006- yawmark, All Rights Reserved.

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Hope that helps, any questions are always welcome, I'll try my best to answer them ;-).
Best regards,
Tomaz

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<operation name="Validate">
<input name="Validate0Request" message="tns:Validate0Request"/>
<output name="Validate0Response" message="tns:Validate0Response"/>
</operation>
</portType>
<binding name="CreditCardBinding" type="tns:CreditCardPortType">
<soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>
<operation name="Validate">
<soap:operation soapAction="" style="rpc"/>
<input name="Validate0Request">
<soap:body use="encoded" namespace="CreditCard.CreditCard" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"/>
</input>
<output name="Validate0Response">
<soap:body use="encoded" namespace="CreditCard.CreditCard" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"/>
</output>
</operation>
</binding>
<service name="CreditCard">
<port name="CreditCardPort" binding="tns:CreditCardBinding">
<soap:address location="http://localhost:8888/FirstSample-CreditCard-context-root/CreditCard.CreditCard"/>
</port>
</service>
</definitions>
Here The methode Validate consume two parameters : string and long
the generated stub look like :
public Vector Validate(Element requestElem) throws Exception
There is some one who have a solution ?
---------------------------------------

My guess is that it is because .NET defaults to generating a document style interface whereas JDeveloper defaults to generating an RPC style interface. The end result is that JDeveloper wraps the document interface in something that looks document like - thus your client. To see how to handle this right now, check out this sample - you have to parse the XML:
http://otn.oracle.com/tech/webservices/htdocs/series/net/content.html
In the preview of JDeveloper 9.0.3 which is due quite soon - next few weeks roughly (crossing my fingers) - JDeveloper will wrap .NET document based Web services in a much more elegant wrapper - giving you exactly what you are looking for - a method called Validate rather than a vector of Elements.
What I don't understand in your sample, however, is that you have WSDL generated from JDeveloper versus WSDL generated from .NET. Did you also do an implementation of the validate method in Java too?
Mike.

Calling a servlet from a Java Stored Procedure

Hey,
I'm trying to call a servlet from a Java Stored Procedure and I get an error.
When I try to call the JSP-class from a main-method, everything works perfectly.
Java Stored Procedure:
public static void callServlet() {
try {
String servletURL = "http://127.0.0.1:7001/servletname";
URL url = new URL(servletURL);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setDoOutput(true);
conn.setRequestProperty("Pragma", "no-cache");
conn.connect();
ObjectInputStream ois = new ObjectInputStream(conn.getInputStream());
Integer client = (Integer)ois.readObject();
ois.close();
System.out.println(client);
conn.disconnect();
} catch (Exception e) {
e.printStackTrace();
Servlet:
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Integer id = new Integer(10);
OutputStream os = response.getOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(os);
oos.writeObject(id);
oos.flush();
oos.close();
response.setStatus(0);
Grant:
call dbms_java.grant_permission( 'JAVA_USER', 'SYS:java.net.SocketPermission','localhost', 'resolve');
call dbms_java.grant_permission( 'JAVA_USER','SYS:java.net.SocketPermission', '127.0.0.1:7001', 'connect,resolve');
Package:
CREATE OR REPLACE PACKAGE pck_jsp AS
PROCEDURE callServlet();
END pck_jsp;
CREATE OR REPLACE PACKAGE BODY pck_jsp AS
PROCEDURE callServlet()
AS LANGUAGE JAVA
NAME 'JSP.callServlet()';
END pck_jsp;
Architecture:
AS: BEA WebLogic 8.1.2
DB: Oracle 9i DB 2.0.4
Exception:
java.io.StreamCorruptedException: InputStream does not contain a serialized object
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java)
The Servlet and the class work together perfectly, only when I make the call from
within the database things go wrong.
Can anybody help me.
Thank in advance,
Bart Laeremans
... Desperately seeking knowledge ...

Look at HttpCallout.java in the following code sample
http://www.oracle.com/technology/sample_code/tech/java/jsp/samples/jwcache/Readme.html
Kuassi

How to call IAC Iview from WebDynpro java code

Hi Team,
I am tring to call IAC Iview from WebDynpro Java code. we are passing value but blank page displayed and there is no error show on error log.
Below is Java Code which i am calling.
public void wdDoInit()
      try {
            String strURL = "portal_content/TestSRM/iView/TestSRM";                           //WDProtocolAdapter.getProtocolAdapter().getRequestParameter("application");
             String random = WDProtocolAdapter.getProtocolAdapter().getRequestObject().getParameter("random_code");
             //wdContext.currentContextElement().setRandomNumber(random);
//below we are call URL
WDPortalNavigation.navigateAbsolute("ROLES://portal_content/TestSRM/iView/TestSRM?VAL="+random,WDPortalNavigationMode.SHOW_INPLACE,(String)null, (String)null,
                   WDPortalNavigationHistoryMode.NO_DUPLICATIONS,(String)null,(String)null, " ");
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
I am passing value from URL.
http://<host Name>:<port>/webdynpro/resources/local/staruser/StarUser?random_code=111111111
when we call above URL we getting blank screen.
Regards
Pankaj Kamble

Hi Vinod,
read this document (from pages 7 ).
<a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/b5380089-0c01-0010-22ae-bd9fa40ddc62">https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/b5380089-0c01-0010-22ae-bd9fa40ddc62</a>
In addition lok at these links: (Navigation Between Web Dynpro Applications in the Portal)
<a href="http://help.sap.com/saphelp_erp2005/helpdata/en/ae/36d93f130f9115e10000000a155106/frameset.htm">http://help.sap.com/saphelp_erp2005/helpdata/en/ae/36d93f130f9115e10000000a155106/frameset.htm</a>
<a href="http://help.sap.com/saphelp_erp2004/helpdata/en/b5/424f9c88970f48ba918ad68af9a656/frameset.htm">http://help.sap.com/saphelp_erp2004/helpdata/en/b5/424f9c88970f48ba918ad68af9a656/frameset.htm</a>
It may be helpful for you.
Best regards,
Gianluca Barile

Looking up EJBs from a java client

While trying to migrate my application from standalone-oc4j
to Oracle Application Server 10g, I ran into the following problem.
My application has a stateless session bean. When trying to lookup the bean (from a java client), I get the following exception:
javax.naming.NamingException: Lookup error: javax.naming.AuthenticationException
Invalid username/password for UnifyoccEAR (ias_admin)
My code used the username/password I used to log into web-based console (which I used to deploy the application). The lookup code follows:
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
OracleJASLayer.INITIAL_CONTEXT_FACTORY);
env.put(Context.PROVIDER_URL, "ormi://localhost:3201/UnifyoccEAR");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, username);
env.put(Context.SECURITY_CREDENTIALS, password);
Context ctx = new InitialContext(env);
Object obj = ctx.lookup("unify/nxj/controlCenters/occ/ControlCenterEJB");
On a whim, I tried the old SCOTT/TIGER username/password and got the following
exception:
javax.naming.NoPermissionException: Not allowed to look up unify/nxj/controlCenters/occ/ControlCenterEJB,
check the namespace-access tag setting in orion-application.xml for details
So evidently, SCOTT/TIGER is in the security database used by the app (but isn't
authorized) while the ias_admin user is not in the security database.
I have the following questions:
1. In the default configuration, is there a username/password I can use to
lookup EJB homes in the jndi namespace of an OC4J instance? If so, what
is it?
2. Where is the security database? I tried looking in the web-based console
to find how to configure security and could not figure it out. I did find
the Security page for the application, but when I tried to add a user,
it had no effect. Furthermore, this page did not show a user entry for
SCOTT; hence, it doesn't seem that OC4J is actually using the information
on this page. This is strange because the path to this page is:
Farm > Application Server: ias_admin.lab10.sac.unify.com > OC4J: home > Application: UnifyoccEAR > Security
I then went to the Security page for the default application and found
that it did have a SCOTT user. So I added a new user and tried to run
my java client. This resulted in the javax.naming.AuthenticationException
described above (I was expected the NoPermissionException encounted when
using SCOTT/TIGER). Next, I used the Security page for the default application
to change the password for SCOTT and reran my java client using SCOTT/TIGER.
This time I was expecting an AuthenticationException exception, but got the
NoPermission exception. Therefore, it seems that OC4J isn't using this
security data either.
Hunting in the console (again) for the security database, I stumble accross
the Infrasturcture page and see an Identity Management section and see that
it is configure to use an Oracle Internet Directory server. Using
<ORACLE_HOME>/bin/oidadmin, I connect to the directory server and look
for the SCOTT user. I don't find it, so I believe that this can't be the
security database either.
3. Finally, how do I configure the OC4J instance such that it will allow
anonymous users to lookup my EJB from a java client?
Please help a confused and frustrated user.

Looking at your example, it looks like you are using a J2EE client container or some properties file to specify the JNDI environment used to create the initial context (for you use the no-arg constructor to InitialContext). Since our application needs to the ability to dynamically connect to ejb's running on different Java application servers (e.g., WebLogic, WebSphere, JBoss), such an approach will not work. Instead we must do it the old-fashioned way and pass the jdni connection info to the InitialContext constructor.
In any event, our problem isn't how to write the connection code, it is how to test it. Specifically, we can't figure out a valid username/password that will allow us to look up the home. Nor can we figure out how to configure security for the oc4j instance.

How to invoke a proxy service from a java client

Hi all,
how could I invoke a proxy service from a java client ?
The proxy service type is 'any xml service' with http protocol.
For a proxy with web service type I can export the related WSDL and generate the java client source.
With 'any xml service' there is no associated wsdl and I'm wondering how to do that.
Thanks
ferp

Hi Ferp,
I used ClientGEN to generate client files from WSDL deployed in ALSB. You can also use Axis for client file generation.
You need to know the WSDL URL. Generate Client files from WSDL URL.
Sample ANT Script
<project name="simple-web" default="mytask" basedir=".">
<taskdef name="clientgen" classname="weblogic.wsee.tools.anttasks.ClientGenTask" classpath="C:\bea92\weblogic92\server\lib\weblogic.jar"/>
<target name="mytask" description="Generate web service client">
          <clientgen wsdl="http://<hostname>:<port>/URL?WSDL"
     destDir="src"
     packageName="com.client.mytask"
     classpath="${java.class.path}" />
     </target>
</project>
Use the following JAVA Code,
try {
     ActivationService service = new ActivationService_Impl("http://<hostname>:<port>/url?WSDL");
client = service.getActivationServicePort();
} catch (Exception ex) {
// Handle Exception
client.activateNumber();
Let me know if you need any more information.
Thanks,
Suman.

Creating initial context from a java client

I have tried to create intial context from a java client.....
but that gives me the following exception:
My code:TestClient.java
import java.util.*;
import javax.naming.*;
public class TestClient
public static void main(String nilesh[]) throws NamingException
Hashtable hash = new Hashtable();
hash.put("Context.INITIAL_CONEXT_FACTORY","com.evermind.server.rmi.RMIInitialContextFactory");
hash.put("Context.PROVIDER_URL","ormi://localhost:23791/symularity");
hash.put("Context.SECURITY_PRINCIPAL","admin");
hash.put("Context.SECURITY_CREDENTIALS","admin");
Context ctx = new InitialContext(hash);
System.out.println("Context: "+ctx);
The output is:
ERROR! Shared library ioser12 could not be found.
Exception in thread "main" javax.naming.NamingException: Error accessing repository: Cannot con
nect to ORB
at com.sun.enterprise.naming.EJBCtx.<init>(EJBCtx.java:51)
at com.sun.enterprise.naming.EJBInitialContextFactory.getInitialContext(EJBInitialConte
xtFactory.java:62)
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 TestClient.main(TestClient.java:14)
is anybody able to solve my problem....
Thanks in advance..
NileshG

Nilesh,
First of all make sure that the shared library error you are getting is fixed by including the library in your classpath. Secondly, where are you running the client from? The connection factory that you use varies depending on where you are connecting from:
1. ApplicationClientContextFactory is used when looking up remote objects from standalone application clients. This uses refs and mappings in application-client.xml.
2. RMInitialContextFactory is used when looking up remote objects between different containers.
3. ApplicationInitalContextFactory is used when looking up remote objects in same application. This is the default initial context factory and this uses refs/mappings in web.xml and ejb-jar.xml.
Rob Cole
Oracle Hello Rob cole..
thank u for ur reply...but actualy i dont know what is application-client.xml and where i can find that file in my j2ee folder...can u give me detail explanation about that...actually i have not created any application or not deployed also without deploying any application i have created that TestClient.java class so how it will relate with application-client.xml....so i have changed the lookup code with ApplicaitonClientContextFactory...but still the same error is coming......can u give me the full explanation or solution of my problem...
Thanks & Regards
NileshG...

How to call a BAPI from Visual Composer

hi,
I am new to Visual composer. can some body give me step by step information of calling a bapi or RFC from VC.
Thanks in advance,
Gopi

Hi Gopi,
Steps involed for calling RFC/BAPI from VC
1. Choose Model->Select Data Services.
(Alternatively, click the Data button in the task panel toolbar.)
2. In the Portal field at the right end of the main toolbar, enter the URL of the portal from
which you can access the back-end system used by the iView.
For example, you could enter: http://<yourportal>:50000/..
3. Click the traffic light icon to the right of the Portal field. The portal Welcome screen
appears.
4. Log on to the portal as a user that exists in the connected back-end system, or which is
mapped to a user of that system. Click OK.
Once a connection to the portal is established, a list of system aliases defined in the
portal system landscape appears in the System drop-down
list.
From the System drop-down list, choose the SAP system that contains the function module.
6. Under Search SAP System, click the Search tab and in the Name field, enter the search string: <RFC/BAPI name>. Then click Search (at the bottom).
5. A list of function modules matching the search string is displayed.
7. Drag the function module/bapi from the Data task panel into the
workspace: The data service is added to your model.
8. Periodically save your work. To do so, choose File->Save Model.
Finally test the iview in VC.
In the workspace, drag your mouse from the Input port of the data service, <inputform> and dragn your mouse from the outut port from the data service <tabelview and etc..>
or
Go through the this documentation...
http://help.sap.com/download/netweaver/nw04/visualcomposer/VC_60_UserGuide_v1_1.pdf
Thanks,
Suriya.

Calling ABAP BAPIs from a JAVA client - Web Services vs. JCo

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