Call EJB from a thread , pb with lookup
Hello,
I have seen taht it is possible to call an EJB within a thread that can act as a client. But in my case when the thread calls the EJB method the lookup failed. I do exactly the same like if I call the ejb from an external client.
In my case I have got the following architecture:
one MDB which receive a message the pass the a "manager of thread" which select a thread and then this thread calls a session bean. Everything goes well until the thread call the EJB method and at this time the lookup fail. I call from local interface as I constructed my jar with all this components inside, i.e the MDB, the thread manager, threads and the session bean.
I tried to call the session bean from the MDB in the same way I have done from the thread and in that configuration its ok.
Is there a specific manner to lookup an ejb when we want to call it from a thread or simply this configuration is completely impossible?
Thanks for any advice
insert the following code before creating the InitialContext:
Thread.currentThread().setContextClassLoader(getClass().getClassLoader());
Similar Messages
-
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.
thnxHi 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 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 AgarwalI 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 -
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, pleasethe 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 -
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> -
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 an applet in 9iAS Release 2?
Hello!
In 9iAS Release 1 it is not so easy to call an EJB from an applet. First the applet needs special privileges and then the applet starts only once. The cause of problem is the implementation of ormi.
Will 9iAS Rel. 2 support Applets calling EJBs?Jeff,
I am also trying to make an applet client for an EJB deployed to OC4J.
I modified the java2.policy file as you suggested, but when I tried to run my applet, I
got the following error:
java.lang.ExceptionInInitializerError: java.security.AccessControlException: access denied (java.util.PropertyPermission tunneling.shortcut read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPropertyAccess(Unknown Source)
at java.lang.System.getProperty(Unknown Source)
at java.lang.Boolean.getBoolean(Unknown Source)
at com.evermind.server.rmi.RMIInitialContextFactory.<clinit>(RMIInitialContextFactory.java:34)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at com.sun.naming.internal.VersionHelper12.loadClass(Unknown Source)
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 its.fnd.ejb.EJBHomeFinder.getHomeObject(Unknown Source)
at its.fnd.flight.ejb.EJBFlightFactory.<init>(Unknown Source)
at its.fnd.flight.FlightFactory.<init>(FlightFactory.java:97)
at EJBApplet.jbInit(EJBApplet.java:47)
at EJBApplet.init(EJBApplet.java:36)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
I am using OC4J (stand-alone) version 9.0.2.0.0 on Solaris 7 and Microsoft Internet Explorer
5.0 with the java 1.3.1 plug-in.
Here is the applet code that I use to lookup the EJB home interface:
Properties props = new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY,"com.evermind.server.rmi.RMIInitialContextFactory");
props.put(Context.PROVIDER_URL,"ormi://host:6666/app");
props.put(Context.SECURITY_PRINCIPAL,"admin");
props.put(Context.SECURITY_CREDENTIALS,"password");
Context ctxt = new InitialContext(props);
Object homeObj = ctxt.lookup("my_bean");
MyBeanHome home = PortableRemoteObject.narrow(homeObj, MyBeanHome.class);
The HTML page with the <applet> tag is a static HTML page that is part of OC4J's default
web application. The applet class file is located in a subdirectory of the default-web-app
directory. Here is the HTML page...
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-1252">
<TITLE>
HTML Test Page
</TITLE>
</HEAD>
<BODY>
<object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" width="580" height="450" name="EJBApplet" align="middle" alt="Loading EJBApplet ...">
<param name="java_code" value="EJBApplet">
<param name="java_codebase" value="/tests">
<param name="java_archive" value="xerces.jar,ejb.jar,oc4j.jar,jaas.jar"/>
<param name="java_type" value="application/x-java-applet;version=1.3">
<param name="java_scriptable" value="true">
<table cellpadding="1" bgcolor="#FFFFFF" width="580" height="450">
<tr><td>
This is a place for an APPLET.<br>Your browser doesn't support the correct applet java plug-in.<br><br>You can install the correct plug-in from here.<br><a target='_blank' onClick='javascript:self.window.close()' href="/classes/3rdparty/j2re-win-plug-in.exe">Click here to install plug-in.</a><br><br>Or if you have an Internet connection you can install the correct plug-in from here.<br><a target='_blank' onClick='javascript:self.window.close()' href="http://java.sun.com/products/plugin/1.3/plugin-install.html">Click here to install plug-in from Internet.</a><br><br>You can call your System Administrator for assistance.</td></tr>
</table>
</object>
</BODY>
</HTML>
I have searched the Internet, and the documentation, and tried several, different things,
but I can't get it to work.
Any and all help will be greatly appreciated.
Thanks,
Sofia. -
Call EJB from a XI Javamapping
I have developed a simple EAR which contains a CMP with local and remote interfaces. This cmp may be successfully called using the remote-interface from a client (j2se) project. Now i like to call the same CMP from within a XI JavaMapping. In the execute method i am using the following code:
InitialContext ctx;
MeraConfigurationLocal configLocal = null;
try {
ctx = new InitialContext();
Object obj = ctx.lookup("localejbs/mgb.ch/XIMera_EAR/MeraConfigurationBean");
if (trace != null)
trace.addInfo("Got object from jndi: "+obj);
MeraConfigurationLocalHome configHome = (MeraConfigurationLocalHome)obj;
if (configHome !=null) {
if (trace != null)
trace.addInfo("ConfigurationLocalHome: "+configHome);
configLocal = configHome.create();
} catch (Exception e) {
throw new StreamTransformationException(e.getMessage(), e);
int port = Integer.parseInt(
configLocal.ReadParam(MeraResourcePoolDispatcherService.CFG_GENERAL_LISTENER_PORT));
if (trace != null)
trace.addInfo("Got listenerport from localejbs/mgb.ch/XIMera_EAR/MeraConfigBean: "+port);
after calling ctx.lookup ... i got the following traceentry in xi:
<Trace level="1" type="T">*** START APPLICATION TRACE ***</Trace>
<Trace level="2" type="T">Got object from jndi: [email protected]30</Trace>
<Trace level="1" type="T">*** END APPLICATION TRACE ***</Trace>
when i try to cast this obj into a MeraConfigurationLocal the system is throwing a ClassCastExceptionHello.
Check my wiki article:
http://wiki.sdn.sap.com/wiki/display/stage/SapNetweaverProcessIntegration.CallEjb3.0methodfromJavaclassmappingPI7.1
(SapNetweaver Process Integration. Call Ejb 3.0 method from Java class mapping PI 7.1) -
Calling EJB from Oracle via IIOP
I've spent the last two days trying to figure out how I can call an
EJB from an Oracle Stored Procedure. I first looked into WLS JNDI
(Using WLInitialContextFactory ), but my collegue recommended I look
into IIOP because it is "less proprietary". I was able to get a WL
example working that does a lookup on an EJB and "narrows" the IIOP
object...so it looked promissing, but then I tried to load the JAR
into Oracle and it said:
"referenced name javax/rmi/PortableRemoteObject could not be found"
So I did a quick check and it looks like this didn't come into
existance until JDK 1.3. By all accounts, Oracle 8.1.6 supports JDK 2
(1.2). So now I'm stuck. I've got a few examples about connecting to
the Oracle ORB using session-iiop, but I don't know if Weblogic will
be able to work with this. I don't know how I'd even call it because
the URL requires an Oracle SID...so now what? I see three options.
Please let me know which would be best (or another option that I'm
missing)
1. Try connecting with Weblogic "T3"
2. Try to get the right combination of classes loaded so 1.2 can work
like 1.3
3. Use the Oracle IIOP (I have no examples for connecting to other
ORBs so I have no idea how to lookup objects).
Chris[email protected] (Chris Snyder) writes:
Andy Piper <[email protected]> wrote in message news:<[email protected]>...
[email protected] (Chris Snyder) writes:
1. Try connecting with Weblogic "T3"It depends on what version of WLS you are using. If you are using 6.1
then you are out-of-luck because this only support JDK 1.3.1.We are using WLS 6.1 and Oracle 8.1.6. There's got to be a way to
connect what is essentially a 1.2 JVM to a 1.3.1 JVM. On my way home
yesterday I was wondering if just straight RMI would work...although
we need to encrypt the connection. I've seen several people talk
about calling EJB's from stored procedures so it seems like there is a
way. Any other ideas?The really gross way is HTTP. In a previous life I had a customer use
oracle's HTTP plug-in to do this. You could probably invert the
problem also. I.e. write CORBA objects that sit inside an Orb hosted
in WLS and invoke on those using oracle's CORBA support. But HTTP is
probably the way most likely to work. You probably couldn't use RMI
over HTTP either - you would have to write a servlet that delegated to
your beans.
andy -
Hi - I'm running OC4J 9.0.2 on windows 2000
I have a JSP that accepts user inputs and the call respective Servlets. Before the servlet gets called, I want to log a tracing event with an EJB(Stateless Session Bean).
I have manipulated the "form" values with JavaScript but cannot find any docs on how to call an EJB from JavaScript in a JSP.
The JSP and EJB works fine on there own. How do I get the "form" values into the EJB variables without JavaScript?
The EJB logs fine while still in the "JAVA" part of the JSP but I don't know how to extract these 2 index values.
Tks
Andre
Here is extract of code:
<%@ page language="java" contentType="text/html;charset=windows-1252"%>
<%@ page language="java" import="java.io.*"%>
<%@ page language="java" import="java.util.*"%>
<%@ page language="java" import="javax.naming.*"%>
<%@ page language="java" import="javax.rmi.*"%>
<%@ page language="java" import="WizardEvents.WizEventLog.*"%>
<HTML>
<HEAD>
<BODY background="/wp/Background.gif">
<script language="JavaScript">
// build timer to display at bottom of screen for debugging of screen dumps
function display_time()
var da = new Date();
var dd = da.getDate('DD');
var dm = da.getMonth('MON')+1;
var dy = da.getYear('YYYY');
var h = da.getHours();
var m = da.getMinutes();
if (m < 10)
m = "0" + m;
var t = dy+"\-"+dm+"\-"+dd+" "+h+":"+m;
defaultStatus = t;
setTimeout("display_time()",60000); // one minute
return true;
function registerEvent()
var menuItem = document.selRequest.selCategory.selectedIndex;
var serviceOption = document.selRequest.serviceOption.selectedIndex;
// now invoke EJB to log event
alert("selected menu option is "+menuItem+" and service option "+serviceOption);
return true;
// get the value from the categories and build up list of the options...
function buildItems()
// alert("Building items");
// get the index (starting with 0) of the categories selection
var menuItem = document.selRequest.selCategory.selectedIndex;
// reset the values for the options selection to 0
document.selRequest.serviceOption.length=0;
// define new array to hold options for transfer to selection item
newOptions = new Array;
// Now check which menu option, build list
var newLength = 0;
switch(menuItem)
case 0:
newLength = 1;
newOptions[0] = new Option("No Service Option",0,false,false);
break;
case 1:
newLength = 1;
newOptions[0] = new Option("No Service Option",0,false,false);
break;
case 2:
newLength = 1;
newOptions[0] = new Option("No Service Option",0,false,false);
break;
case 3:
newLength = 1;
newOptions[0] = new Option("No Service Option",0,false,false);
break;
case 4:
newLength = 1;
newOptions[0] = new Option("No Service Option",0,false,false);
break;
case 5:
newLength = 5;
newOptions[0] = new Option("All wallet and airtime balance",0,true,true);
newOptions[1] = new Option("Airtime balance",1,false,false);
newOptions[2] = new Option("SMS-a-lot balance",2,false,false);
newOptions[3] = new Option("Call Extender balance",3,false,false);
newOptions[4] = new Option("Per Second Billing balance",4,false,false);
break;
case 6:
newLength = 2;
newOptions[0] = new Option("Subscriber data - Channel Provisioning Options",8,true,true);
newOptions[1] = new Option("IBS Pending Transaction Inquiry",9,false,false);
break;
default:
newLength = 1;
newOptions[0] = new Option("No Service Option - Default",0,false,false);
break;
var serviceOption = document.selRequest.serviceOption;
// transfer array to select statement
for (var i=0; i < newLength; i++)
serviceOption.options[i] = newOptions;
</script>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-1252">
<TITLE>Wizard Prepaid Interface</TITLE>
<%----%>
<BODY text="#FFFFFF" bgcolour="#ffffff" bgcolor="#3c698a" onload="display_time();" >
<H2 ALIGN=Center>Wizard Prepaid Interface</H2>
<PRE>
<%
java.util.Enumeration params=request.getParameterNames();
StringBuffer urlBuf = request.getRequestURL();
String urlValue = urlBuf.toString();
int colPos = urlValue.indexOf(":8888");
String serverName = urlValue.substring(0,colPos+5);
String paramValues1[] = request.getParameterValues("event_ref_no");
String eventRefNo = paramValues1[0];
String paramValues2[] = request.getParameterValues("msisdn_no");
String msisdnNo = paramValues2[0];
String paramValues3[] = request.getParameterValues("operator_id");
String operatorId = paramValues3[0];
String paramValues4[] = request.getParameterValues("wizDB");
String wizDB = paramValues4[0].toLowerCase();
// set session values into session object
session.removeAttribute("eventRefNo");
session.removeAttribute("msisdnNo");
session.removeAttribute("operatorId");
session.removeAttribute("wizDB");
session.removeAttribute("serverName");
session.setAttribute("eventRefNo",eventRefNo);
session.setAttribute("msisdnNo",msisdnNo);
session.setAttribute("operatorId",operatorId);
session.setAttribute("wizDB",wizDB);
session.setAttribute("serverName",serverName);
session.setAttribute("eventOpenCount","0");
session.setAttribute("errorString","No errors encountered yet");
// now build ref to lookup event log EJB
WizardEvents.WizEventLog eventBean;
Context ctx = new InitialContext();
Object homeObject=ctx.lookup("WizEventLog");
WizardEvents.WizEventLogHome home =
(WizardEvents.WizEventLogHome)PortableRemoteObject.narrow(homeObject, WizardEvents.WizEventLogHome.class);
eventBean=(WizardEvents.WizEventLog)PortableRemoteObject.narrow(home.create(),
WizardEvents.WizEventLog.class);
int eventRefNoInput = Integer.parseInt(eventRefNo);
int operatorIdInput = Integer.parseInt(operatorId);
long msisdnNoInput = Long.parseLong(msisdnNo);
int callCatCodeInput = 177;
int callCatItemCodeInput = 2;
String machineName = "WEB";
String moduleName = "WIZARDPREPAID.JSP";
String[] resArray = null;
// event logging EJB
resArray = eventBean.setEventDetail(eventRefNoInput,
operatorIdInput,
callCatCodeInput,
callCatItemCodeInput,
machineName,
moduleName,
wizDB);
%>
</PRE>
<%--
// check if data passed is valid
--%>
<jsp:include page="/servlet/CheckValidURL" flush="true"></jsp:include>
<%
if (session.getAttribute("eventOpenCount").equals("1"))
%>
<H3 ALIGN=CENTER>MSISDN = <%=msisdnNo%></H3>
<HR>
<H4 ALIGN=CENTER>Prepaid Query History</H4>
<%--
onclick can empty the service options field
--%>
<TABLE>
<TD>Enter request target :</TD>
<%--action="/wp/servlet/ValidateParamsClass"--%>
<FORM name="selRequest" method="POST" >
<TD><SELECT name="selCategory" onchange="buildItems()" >
<OPTION value="Prepaid Cards Loaded">Prepaid Cards Loaded</OPTION>
<OPTION value="Prepaid Recycle History">Prepaid Recycle History</OPTION>
<OPTION value="Prepaid Failed Recharges">Prepaid Failed Recharges</OPTION>
<OPTION value="Prepaid Access4Life Status">Prepaid Access4Life Status</OPTION>
<OPTION value="Prepaid Number4Life Status">Prepaid Number4Life Status</OPTION>
<OPTION value="IBS Balance Inquiry">IBS Balance Inquiry</OPTION>
<OPTION value="IBS Subscriber Data Inquiry">IBS Subscriber Data Inquiry</OPTION>
</SELECT>
</TD>
</TABLE>
<%--
Build the possible service options for IBS depending on selection
Create selection list and then assign default value of none
--%>
<TABLE>
<TD>Possible Service Options:</TD>
<TD><select name="serviceOption">
<option value="">No option available</option>
<SCRIPT>
// re-build items to cater for FORWARD/BACK buttons, etc
buildItems();
</SCRIPT>
</TD>
</TABLE>
<%--
--%>
<%--
--%>
<INPUT type="submit" value="Query Prepaid Systems" onclick="registerEvent()" >
</FORM>Hi Christian,
A few questions to clarify where the cause of the problem might be:
1. When you run the JSP app in JDeveloper, are you connecting to the remotely deployed app module, or the local one in your workspace?
2. In your JSP project, there is an appmodule.properties file. This file should specify the connection mode to use to connect to your EJB (ConnectMode=EJB), and should be deployed to a directory on your webserver's classpath, along with the connections.properties file. If the appmodule.properties file contains the wrong connectmode setting, or is not on the classpath for the webserver, this might be the cause.
Let us know. -
I need to make a several calls to the methods inside EJB1 from EJB2. I was getting
the remote reference of the EJB2 inside the ejbCreate() of the EJB1, is it a good
practice ?? If not, do I need to get remote reference of the EJB2 every time I
need to call EJB2 method??
Thanks in advance.To refer a Ejb from another Ejb include <ejb-ref> in ejb-jar.xml
<session>
<ejb-name>Ejb1</ejb-name>
<ejb-ref>
<ejb-ref-name>Ejb2</ejb-ref-name>
<ejb-ref-type>Entity</ejb-ref-type>
<home>com.ejb.Ejb2Home</home>
<remote>com.ejb.Ejb2</remote>
</ejb-ref>
<session>
Include a <reference-discriptor> in weblogic-ejb-jar.xml
<weblogic-enterprise-bean>
<ejb-name>EjbSession</ejb-name>
<reference-descriptor>
<ejb-reference-description>
<ejb-ref-name>Ejb2</ejb-ref-name>
<jndi-name>com.ejb.Ejb2Home</jndi-name>
</ejb-reference-description>
</reference-descriptor>
</weblogic-enterprise-bean>
In Ejb1 bean class refer to Ejb2 method with a remote reference to Ejb2.
InitialContext initialContext = new InitialContext();
Ejb2Home ejb2Home = (Ejb2Home)initialContext.lookup("com.ejb.Ejb2Home");
Ejb2 ejb2 = ejb2Home.findByPrimaryKey();
Alex Pratt wrote:
I need to make a several calls to the methods inside EJB1 from EJB2. I was getting
the remote reference of the EJB2 inside the ejbCreate() of the EJB1, is it a good
practice ?? If not, do I need to get remote reference of the EJB2 every time I
need to call EJB2 method??
Thanks in advance. -
Hi Everyone.
I have a question on calling an EJB from a Web Service.
Is this the correct way of calling a EJB out of a web service?
We have another implementation with the same flow, and it's not calling some of the methods, unless we add @TransactionAttribute on the mehod.
I've read some of the articles for adding a transaction attribute, but what I do not understand is that sometimes it work without the attribute and sometimes we need to add the attribute.
Our entry point is the web service and from there we call the local ejb methods.
Here is the example:
1. The Web Service
@WebService()
@Stateless()
public class HouseWS {
@EJB
private PeopleLocal people;
* Web service operation
@WebMethod(operationName = "sayHallo")
public void sayHallo() {
//TODO write your implementation code here:
people.doPeople();
}2. The Local EJB
@Local
public interface PeopleLocal {
public void doPeople();
}3. The Bean
@Stateless
public class People implements PeopleLocal {
public void doPeople() {
System.out.println("do the people local bean");
// Add business logic below. (Right-click in editor and choose
// "Insert Code > Add Business Method")
}Here is the scenario that we are struggling with.
We go into the @WebMethod(operationName = "stepOneReconciliation") method.
We also added @TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED) to the web service method. Is this necessary?
From the web service method we call the public String stepOneReconciliation(String requestXML) in the bean.
Web service
@WebService()
@Stateless()
public class AeReconciliationWebService {
@EJB
private ReconciliationsLocal reconciliationsLocal;
@WebMethod(operationName = "stepOneReconciliation")
@TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED)
public String stepOneReconciliation(@WebParam(name = "requestXML")
String requestXML) {
return reconciliationsLocal.stepOneReconciliation(requestXML);
@WebMethod(operationName = "stepTwoReconciliation")
@TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED)
public String stepTwoReconciliation(@WebParam(name = "requestXML")
String requestXML) {
return reconciliationsLocal.stepTwoReconciliation(requestXML);
The bean.
All the facade lookups work in the first if(request.getReconType().equals(REVENUE_RECON_TYPE)) statement even though we do not add the TransactionAttributeType.NEVER, but if we go into the else if(request.getReconType().equals(REVENUE_RECON_TYPE)) the lookups doesn't work.
We have added TransactionAttributeType.NEVER to the method and then the else if ejb lookups work.
Why do we need to add the attributeType for the else if lookups to work?
@EJB
GeneralLedgerFacadeLocal generalLedgerFacadeLocal;
@TransactionAttribute(TransactionAttributeType.NEVER)
public String stepOneReconciliation(String requestXML) {
String requestName = "stepOneReconciliation";
String moduleName = "Reconciliation";
AeReconciliationRequest request = null;
//read in xml
if(request.getReconType().equals(SERVICE_RECON_TYPE)) {
ServiceRecon serviceRecon = serviceReconFacadeLocal.findGreaterThanDateTo(request.getToDate(), request.getServiceCode());
if(serviceRecon != null) {
LogUtil.error("AEException", "Recon already occured for a greater date", "" + newRequestId);
return AeSystemUtils.returnResponse(SystemCodeUtils.AE_INVALID_INFORMATION, null, null, null, stanley);
} else {
//Find all values smaller than toDate
double reconAmount = 0;
Date toDateUtil = DateUtils.getDateFromString(request.getToDate());
Date fromDate = null;
List <ServiceRecon> serviceReconList = serviceReconFacadeLocal.findByServiceCode(request.getServiceCode());
if(serviceReconList != null && serviceReconList.size() > 0) {
fromDate = ((ServiceRecon) serviceReconList.get(0)).getReconToTs();
Calendar tempCal = Calendar.getInstance();
tempCal.setTimeInMillis(fromDate.getTime());
tempCal.add(Calendar.MILLISECOND, 1);
fromDate = tempCal.getTime();
List<GeneralLedger> generalLedgerList = generalLedgerFacadeLocal.findByBetweenToAndFromDateForServiceCode(request.getServiceCode(), fromDate, toDateUtil);
for (Iterator<GeneralLedger> it = generalLedgerList.iterator(); it.hasNext();) {
GeneralLedger generalLedger = it.next();
if (generalLedger.getAccountDebitId() != null && generalLedger.getAccountDebitId().getAccountTypeId().getCode().equals(AccountTypeStatic.TRADING.getCode()) && generalLedger.getAmount() != null) {
reconAmount -= generalLedger.getAmount().longValue();
if (generalLedger.getAccountCreditId() != null && generalLedger.getAccountCreditId().getAccountTypeId().getCode().equals(AccountTypeStatic.TRADING.getCode()) && generalLedger.getAmount() != null) {
reconAmount += generalLedger.getAmount().longValue();
return AeSystemUtils.returnReconciliation(SystemCodeUtils.SUCCESS, moduleName, new Double(reconAmount).longValue() + "", null, stanley);
} else if(request.getReconType().equals(REVENUE_RECON_TYPE)) {
RevenueRecon revenueRecon = revenueReconFacadeLocal.findGreaterThanDateToAndSplitRevenue(request.getToDate(), false);
if(revenueRecon != null) {
LogUtil.error("AEException", "Recon already occured for a greater date", "" + newRequestId);
return AeSystemUtils.returnResponse(SystemCodeUtils.AE_INVALID_INFORMATION, null, null, null, stanley);
} else {
//Find all values smaller than toDate
double reconFeeAmount = 0;
double reconCommissionAmount = 0;
Date toDateUtil = DateUtils.getDateFromString(request.getToDate());
Date fromDate = null;
List <RevenueRecon> revenueReconList = revenueReconFacadeLocal.findBySplitFee(false);
if(revenueReconList != null && revenueReconList.size() > 0) {
fromDate = ((RevenueRecon) revenueReconList.get(0)).getReconToTs();
Calendar tempCal = Calendar.getInstance();
tempCal.setTimeInMillis(fromDate.getTime());
tempCal.add(Calendar.MILLISECOND, 1);
fromDate = tempCal.getTime();
Long debitFeeAmount = generalLedgerFacadeLocal.findBetweenToAndFromDateForDebitFeeAccount(fromDate, toDateUtil);
Long creditFeeAmount = generalLedgerFacadeLocal.findBetweenToAndFromDateForCreditFeeAccount(fromDate, toDateUtil);
reconFeeAmount = (creditFeeAmount-debitFeeAmount);
Long debitCommissionAmount = generalLedgerFacadeLocal.findBetweenToAndFromDateForDebitCommissionAccount(fromDate, toDateUtil);
Long creditCommissionAmount = generalLedgerFacadeLocal.findBetweenToAndFromDateForCreditCommissionAccount(fromDate, toDateUtil);
reconCommissionAmount = (creditCommissionAmount-debitCommissionAmount);
reconFeeAmount = reconFeeAmount - reconCommissionAmount;
return AeSystemUtils.returnReconciliation(SystemCodeUtils.SUCCESS, moduleName, new Double(reconFeeAmount).longValue() + "", null, stanley);
} else if(request.getReconType().equals(SPLIT_REVENUE_RECON_TYPE)) {
return AeSystemUtils.returnResponse(SystemCodeUtils.AE_INVALID_XML_REQUEST, null, null, null, stanley);
} -
Hi friends,
I have a problem of caling EJB from applet.that too from browser.
Through dos prompt,I am able to set the classpath and then open the applet and then call the EJB.but thru browser i am encontering two problems,
First,The codebase of applet is not being set and i am unable to view the applet.
Second,my Initial Context Factory is not being found it is giving error as
Cannot instantiate class: com.evermind.server.rmi.RMIInitialContextFactory.I am using oracle app server Oc4j2.
can any one help me out.
i am able to get output thru dos prompt where i can set classpathkyren,
he has used something called HTML ConvertersDepends on the version of the plug-in you are using.
(I'm sorry, but I couldn't find that detail in any of your posts!)
You have to use the (HTML) converter with java version 1.3 (for example), but you don't have to with java version 1.4.
thru my jbuilder version i am able to solve my
problem.
but thru browser,i am first of all not able to
display applet.That's because "JBuilder" uses the appletviewer to display the applet (and not a browser).
I Think for normal displaying applet we don't need of
signed or unsigned applet.when calling ejb we may
require.As Anupama has stated, the "codebase" attribute of the applet tag must be relative to the directory where the HTML file (containing the "applet" tag) is located. Where I work, we also use the "archive" attribute that tells the applet where to download the JAR files from. In order to lookup your ejb from your applet, you need (at least) the "oc4jclient.jar" file.
By the way, if you want your name to appear next to your posts (instead of your ID number), you need to update your profile. Click on the "Forum Settings" link at the top of the (Web) page.
Good Luck,
Avi. -
Calling EJB from class in same ear
Has anyone ever attempted to call an EJB from a class that is in the same ear?
I have a singleton class, not
another EJB, that is trying to get ahold of an EJB to call a method. This method
has been defined to have both
a local and remote interface.
I thought I should be able to get a hold of the local interface. When I try to
get the interface out of JNDI
as follows:
PickupCpaLocalHome cpaHome = (PickupCpaLocalHome) ctx.lookup("pickup.PickupCpaEJBLocal");
I get an exception:
javax.naming.LinkException: [Root exception is
javax.naming.NameNotFoundException: Unable to resolve
'app/ejb/PickupCpaEJB.jar#PickupCpaEJB/local-home' Resolved: 'app/ejb'
Unresolved:'PickupCpaEJB.jar#PickupCpaEJB' ; remaining name
'PickupCpaEJB.jar#PickupCpaEJB/local-home']; Link Remaining Name:
'java:app/ejb/PickupCpaEJB.jar#PickupCpaEJB/local-home'
When I look at the JNDI tree using the WebLogic console, it shows that "pickup.PickupCpaEJBLocal"
is
in JNDI.
Since the local interface doesn't work, I thought I'd try the remote interface.
The remote interface
works fine from my client and from another EJB in a different ear. Using the
remote interface I get an
exception when trying to cast the result to my home.
java.lang.ClassCastException:
com.fedex.pickup.j2ee.ejb.cpa.PickupCpaEJB_gapk5_HomeImpl_WLStub
// Code
PickupCpaHome cpaHome = (PickupCpaHome) ctx.lookup("pickup.PickupCpaEJBRemote");
As I mentioned earlier, the same code works in a client and in an EJB in another
ear.
Any ideasHas anyone ever attempted to call an EJB from a class that is in the same ear?
I have a singleton class, not
another EJB, that is trying to get ahold of an EJB to call a method. This method
has been defined to have both
a local and remote interface.
I thought I should be able to get a hold of the local interface. When I try to
get the interface out of JNDI
as follows:
PickupCpaLocalHome cpaHome = (PickupCpaLocalHome) ctx.lookup("pickup.PickupCpaEJBLocal");
I get an exception:
javax.naming.LinkException: [Root exception is
javax.naming.NameNotFoundException: Unable to resolve
'app/ejb/PickupCpaEJB.jar#PickupCpaEJB/local-home' Resolved: 'app/ejb'
Unresolved:'PickupCpaEJB.jar#PickupCpaEJB' ; remaining name
'PickupCpaEJB.jar#PickupCpaEJB/local-home']; Link Remaining Name:
'java:app/ejb/PickupCpaEJB.jar#PickupCpaEJB/local-home'
When I look at the JNDI tree using the WebLogic console, it shows that "pickup.PickupCpaEJBLocal"
is
in JNDI.
Since the local interface doesn't work, I thought I'd try the remote interface.
The remote interface
works fine from my client and from another EJB in a different ear. Using the
remote interface I get an
exception when trying to cast the result to my home.
java.lang.ClassCastException:
com.fedex.pickup.j2ee.ejb.cpa.PickupCpaEJB_gapk5_HomeImpl_WLStub
// Code
PickupCpaHome cpaHome = (PickupCpaHome) ctx.lookup("pickup.PickupCpaEJBRemote");
As I mentioned earlier, the same code works in a client and in an EJB in another
ear.
Any ideas -
How to call ejb from Forms?
Hi.
I have an existing form (version 11.1.2.0.0) and an existing ejb. Both are running on a WebLogic server version 10.3.5.0. I want to call the ejb from the form (I know that this is not recommended, but in this case it is the only sensible solution). I have tried searching the web but I have not been able to find anything about this except some broken links.
Can somebody please explain how to do this or show me some documentation or tutorial?
Regards,
Sveinung
Edited by: SvSig on Aug 7, 2012 11:52 PMLet's skip the fact that you are asking about an EJB and instead talk about what options are available to call out to any external app or component. Here are some of the options:
<blockquote>1. To make calls from the client machine to any web server (HTTP listener) you can use WEB.SHOW_DOCUMENT. This command simply passes a url to a browser. No return information is passed back into the running form.
2. To make calls from the client machine to almost any process on the client side, including the OS directly, you would need to create a java bean and integrate it into your form. Whether or not you get return information will depend on how you write the bean and to what you are calling.
3. To make calls from the server side (mid tier) part of a running form to an external application or component on the same mid tier you can use the HOST command. This executes a shell command. Although specific information cannot be returned (i.e. return values), you can get pass or fail results.
4. To call out to java applications on the mid tier you can import java code into your Forms application using the Forms Java Importer. This will give you a direct connection to the java application both in and out.</blockquote>
All of the above examples are explained in the Forms Builder online help. There are other options which are explained in the Forms Deployment Guide
<blockquote>http://docs.oracle.com/cd/E24269_01/doc.11120/e24477/toc.htm</blockquote>
Look specifically at chapters 6-8
<blockquote><li>6 Oracle Forms and JavaScript Integration
<li>7 Enhanced Java Support
<li>8 Working with Server Events</blockquote>
Summary
<blockquote><li>WEB.SHOW_DOCUMENT
<li>HOST
<li>Java Bean
<li>Imported Java</blockquote>
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