I hv err on accessing my bean class to a servlet class, plz guide me.

the error is "import com.Bean" is not exit, and can not access "Bean.class".

in this case, your compiler is not lying to you. the class com.Bean doesn't exist

Similar Messages

JSP page access regular Java class

I am new to JSP. But most of the time people say JSP page access Java Bean classes.
I want to know what if I want to access regular Java classes?? Should I do like this
in the code:
<%
     NormalJavaClass cl = new NormalJavaClass();
     cl.process();
%>
<%-- JSP page access Java Bean -- %>
<jsp:useBean scope="session" id="formDataBeanObj" class="formdatatest.FormDataBean"/>
<jsp:setProperty name="formDataBeanObj" property="*"/>
<HTML>
<HEAD>
<TITLE>page1.jsp</TITLE>
<BODY>
<FORM METHOD="POST" ACTION="page2.jsp">
     <H2>User Name = <jsp:getProperty name="formDataBeanObj" property="username"/></H2>
<%
     NormalJavaClass cl = new NormalJavaClass();
     cl.process();
%>
<P><INPUT TYPE="SUBMIT" VALUE="submit here">
</FORM>
</BODY>
</HTML>
Please advise. Thanks!!

Yes, you can instantiate and reference any class visible to the Java runtime from within a JSP just as you can in an "ordinary" Java class. Behind the scenes, a JSP is converted into Java source code for a servlet class, and then compiled into the .class file. When you insert code into JSPs using either taglibs or code delimiters (<% %>, <%= %>), the JSP/servlet "engine" inserts this code into the servlet source code verbatim, and all non-Java text from the JSP is inserted into the source code inside of JspWriter.write(xxx) statements.
If you'd like to see the source code that your JSP is converted into, run your JSP in Tomcat and look in the "work" folder within the Tomcat folder after you access it the first time. Experiment around with the JSP and see how code within the <% %> and <%= %> blocks is inserted into the .java file.

Accessing Managed Bean Variables in Entity Impl Class

How can I access managed bean variables in the entity Impl class .
While inserting a new record in DB , i want to set few entity properties values . The values of those properties are available in the managed bean .
How can i access those values from Managed Bean and set them the entity Impl class to override the create method.
Or is there any better recommended approaches ?
Jdev - 11.1.1.5

>
While inserting a new record in DB , i want to set few entity properties values .
>
you can user CreateWithparams
http://www.oracle.com/technetwork/developer-tools/adf/learnmore/13-create-with-params-169140.pdf
http://andrejusb.blogspot.com/2011/02/createwithparams-operation-for-oracle.html

Few basic doubts about accessing AM from backing bean class

Hi ADF experts,
I have just started working in ADF Faces.I made a sample search page.My page is attached to a managed backing bean. I have attached command button on my page to a custom method in backing bean class.
So on, click of button this method is called in backing bean.Now, i have few doubts:
1)How to get values of various UI beans in this event code?
2)I am accesing AM , in my method with this code:
FacesContext facesContext = FacesContext.getCurrentInstance();
ExternalContext extContext = facesContext.getExternalContext();
Application app = facesContext.getApplication();
DCBindingContainer binding = (DCBindingContainer)app.getVariableResolver().resolveVariable(facesContext, "bindings");
//Accessing AM
ApplicationModule am = binding.getDataControl().getApplicationModule();
iS this correct ?
3) After getting handle of am how to call my custom method in AM Class?there was "invokeMethod" API in application module class in OAF, is there any such method here?
Please help me.
--ADF learner.

Thanks for ur response Frank, actually I am from OA Framework back ground.It would be great if help us a little with ur valuble thoughts.
OA Framework also uses bc4j in model layer of framework. We have a requirement where our existing developers from OA Framework have to move to ADF to make a new application where time lines are quite strict.If this would not be possible we will switch to plain jsp and jdbc,but our tech experts say ADF Faces is the best tech.
In OA Framework, Application Module is key class for all busiess logic and Controller is used for page navigation. So, I m just trying to find the same similarity , where we write we add all event codes in custom action methods in the backing bean class of page, which we consider equivalent to process form request method in Controller class of OAF.
But there are two things, I still want to know:
1)While page render, how to call specific AM methods(like setting where clause of certain VOs)
2)In action methods, the way i described(I found that in one thread only)to access AM, what is wrong in that?Also, I went through
http://radio.weblogs.com/0118231/stories/2004/09/23/notYetDocumentedAdfSampleApplications.html
where coule of examples use similar approach to access AM from backing bean class and call custom methods of AM(Doing various, deletes etc from VOs).
3)In these methods can we set any property of beans on the page, I am asking because in OAF, generally we use PPR for js alternatives.But all properties of beans cannot be set in post event.
Thanks and Regards
--ADF Learner

Accessing managed-beans property from simple java class

I have managed bean that is registered in faces-config.xml:
<managed-bean>
<managed-bean-name>documentReportsBean</managed-bean-name>
<managed-bean-class>[myApp].beans.DocumentReportsBean</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
I want to access property of documentReportsBean from other java class without registering managed-property in faces-config. How can I do that?

Thank you, what I needed was someone saying the right word. "ValueBinding" in this case.. :)
Two lines:
ValueBinding vb = FacesContext.getCurrentInstance().getApplication().createValueBinding("#{documentReportsBean}");
DocumentReportsBean pbean = (DocumentReportsBean) vb.getValue(FacesContext.getCurrentInstance());
gives my full control. Nice

Accessing view object class (impl) method from bean (or vice versa)

Halo everyone, I am using JDeveloper 11.1.2.1.0
I have a UsersViewImpl class with a method which refresh the user table like below.
public void resetEmployeeSearch() {
removeApplyViewCriteriaName("viewCriteria");
executeQuery();
and I have a UserBean class with a method which reset the search fields values like below.
public void resetInput(ActionEvent actionEvent) {
........RichInputText = input ...
input.setValue("");
AdfFacesContext.getCurrentInstance().addPartialTarget(searchForm);
I would like to implement it in such a way that, once I press a button, both methods will be called.
I have tried to call from bean method using UsersViewImpl vs = new UsersViewImpl ..... which is wrong and wont work.
I have read about doing something like ViewObject vo = am.findViewObject("DeptView1") but I duno how to use it because I cant have a proper example.
Any suggestion on accessing view object class (impl) method from bean (or vice versa)?
Or is there any way to combine both method in the same class ?
Thank you :(

User, if you get class not found exceptions you need to tell us which classes you can't find. The JSFUtils and ADFUtils classes needing some other libraries which should already be part of your Fusion Web Application template (which your adf application should be based on). If you did not use this application template, you may have to add some libraries yourself.
What is the diff of using the ADFUtils and OperationBinding way?
The ADFUtils can get you access to the application module which you then use to call exposed methods on. The disadvantage of doing this is that you have to implement your own exception framework which then handles exceptions thrown by the application module. An other thing is that if you e.g. alter a VO which you use on the page this changes are not seen on the page until you refresh the page. The binding layer does not know about these changes so the iterators (which are used on the page to show the data) are not refreshed and so you don't see the changes.
In general you should avoid using the application modul in a managed bean method and always use the binding layer (OperationBinding) to call methods. This ensures that exceptions are all handled the same way and that changes to the data model are reflected in the GUI.
Timo

Using a backing bean in JDeveloper to assign bean class variables

I am using JDeveloper 10 to make a jsp page that is a form full of inputs and buttons. JDeveloper then creates the setters and getters for you for the ids of the various inputs and buttons. I also have used JDeveloper to create a backing bean.
The idea of this is to have the backing bean read in parameter(s) from an http source/link(when the form is loaded or instantiated) and assign those parameter(s) to one of the bean class local variables.
The reason i want to do this is, is that when the form is loaded the first thing it will do is open up an available database(in the bean class constructor), then in the constructor call a function to do a database query that will return a result set that will then be used to fill up the form.
That variable that is assigned by the backing bean will be the value of a unique database identifier for doing the sql query so that is why it is important that i get this value as the form loads.
So simply i need to find out from someone how to do this. i am totally new to doing any jsp development or using managed beans and i have gotten far enough to launch the form, retrieve and write to the database using sql queries and all the rest.
I just dont know enough about managed beans to make a decision on things like making the bean have a session scope. do i need request scope? if i change to request scope how do i make sure the database isn't being called every time the page changes or is refreshed?(when i had it as request scope the constructor was being called every time the page was reloaded and that isnt effecient at all, especially with multiple users). can you define more than one managed bean in one faces config file? do i have to manually change something in the jsp file to make sure things run smoothly?
Just maybe things are easier than i see them to be and my only problem is that i just dont understand what i am doing. here is what my backing bean looks like now with just basic session scope.
An example of course would be something like: http://host:port/context-root/faces/register.jsp?12345 - where 12345 would be the value that i would like to assign to a local variable in my bean class that can then be used for filtering out information via a query then filling up the form, all this happening at instantiation.
<?xml version="1.0" encoding="windows-1252"?>
<!DOCTYPE faces-config PUBLIC
"-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.1//EN"
"http://java.sun.com/dtd/web-facesconfig_1_1.dtd">
<faces-config xmlns="http://java.sun.com/JSF/Configuration">
<managed-bean>
<managed-bean-name>beanpackage</managed-bean-name>
<managed-bean-class>beanpackage.beanclass</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>

</managed-bean>
</faces-config>
This is what i have now, i've tried tons of stuff on the web like assigned value parameters but just am stuck on exactly what to do as nothing has seemed to work. Any help would be appreciated. Thanks in advance!

Hi,
don't think you will get a readily programmed solution to this (though I wish you luck). Here's how I would approach the managed bean issue
- One managed bean that you configure from a java.util.HashMap. This bean should be in requestScope (should be okay here). Say the bean is called "formFields", then adding data to it can be done with the following EL #{formBean['attribute_name']}. You need to add this as the value Expression of the inputText field you create dynamically. The filed will then read and write to the HashMap
- Create a managed bean in session scope to handle the database interaction. Put this into session scope (e.g. "database")
- Create a managed bean that holds the action listener that handles the update, insert and delete actions (e.g. logic handler). This bean has a JSF reference to the root component in the page (or the form layout component to add the fields to)
The "database" bean is referenced from the logic handler managed bean using the #{database} expression, which you resolve using a ValueBinding (ExpressionBinding in JSF 1.2). Or, you configure the bean as a managed property.
The logic managed bean also needs to reference the formFields bean (similar to above) to access the contained filed names and attributes. If the filed attributes match column names in the database then you should be all set
Frank

Multiple instances of the same bean class in session?

I�m trying to think of a way to have multiple instances of the same bean class in session scope using JSF. For example, let�s say that I have two <h:dataTable>s on the same page. They both use the backing bean called genericBean. Now, the content for genericBean will be different for each <h:dataTable>. In fact, the data source that backs genericBean is not known until runtime. It could be a database, web service, etc.
What I would like is for when JSF needs access genericBean instead of looking for the value with key �genericBean� in the session map it looks for �genericBean_[some runtime ID]�. I could specify this id in EL on a custom component, as a request parameter or whatever.
I think that I need the bean to be in session scope because the tables are complex and I want them to be editable.
I have some ideas about how I can do this but I was wondering if someone has already solved this problem or if there is a standard way to do this using tools like Shale, etc.
Thanks,
Randy

Well, I came up with an interesting solution to this so I thought that I would post it here.
I have a page that looks like this.
<html>
<head>
<title>My Page</title>
</head>
<body>
<f:view>
<f:subview id="component1">
<jsp:include page="component.jsp">
<jsp:param name="id" value="a" />
</jsp:include>
</f:subview>
<hr>
<f:subview id="component2">
<jsp:include page="component.jsp">
<jsp:param name="id" value="b" />
</jsp:include>
</f:subview>
</f:view>
</body>
</html>
And component.jsp looke like this.
<f:verbatim>
<p>
<h1>Component
</f:verbatim>
<h:outputText value=" #{param.id}" />
<f:verbatim>
</h1>
</p>
</f:verbatim>
<h:form>
<h:outputText value="#{component.id}" />
<h:outputText value="#{component.value}" />
<h:commandButton value="increment" action="#{component.increment}" />
<h:commandButton value="decrement" action="#{component.decrement}" />
<f:verbatim>
<input type="hidden" name="id"
value="</f:verbatim><h:outputText value="#{param.id}"/><f:verbatim>" />
</f:verbatim>
</h:form>
The idea is that I want component.jsp to be initialized differently based on the id param. The component managed bean is configured to be in session scope but I want the component instance for id a and id b to be different instances in session scope. Therefore, I added a custom variable resolver to handle this.
public Object resolveVariable(FacesContext context, String name) {
// This id will be different for the different subviews.
HttpServletRequest request = (HttpServletRequest) context.getExternalContext() .getRequest();
String id = request.getParameter("id");
// If there is an id in the request then check if this is a bean that can have multiple
// instances in session scope.
if ((id != null) && (id.length() > 0)) {
ExternalContext ec = context.getExternalContext();
// Build the new name for the key of this bean
String newName = name + "_" + id;
Object value = null;
// See if the bean instance already esists.
if ((null == (value = ec.getRequestMap().get(newName))) &&
(null == (value = ec.getSessionMap().get(newName))) &&
(null == (value = ec.getApplicationMap().get(newName)))) {
     // We could not find the bean instance in scope so create the bean
     // using the standard variable resolver.
value = original.resolveVariable(context, name);
// Now check if the bean implements that page component interface. If it is
// a page component then we want to rename the key to access this bean so
// that the instance is only used when the id is provided in the request.
// For example, if there are two components (a and b) we will have in session scope
// component_a and component_b. The will each point to a unique instance of the
// Component bean class.
if (value instanceof PageComponent) {
// Try to get the value again
if (null != (value = ec.getRequestMap().get(name))) {
     // Initialize the bean using the id
((PageComponent) value).initInstance(id);
ec.getRequestMap().remove(name);
ec.getRequestMap().put(newName, value);
} else if (null != (value = ec.getSessionMap().get(name))) {
((PageComponent) value).initInstance(id);
ec.getSessionMap().remove(name);
ec.getSessionMap().put(newName, value);
} else if (null != (value = ec.getApplicationMap().get(name))) {
((PageComponent) value).initInstance(id);
ec.getApplicationMap().remove(name);
ec.getApplicationMap().put(newName, value);
return value;
return original.resolveVariable(context, name);
}

Executing a SQL Command in my bean class

Hello everyone,
I'm using JDeveloper 12.1.2.0.0.
I have an interest in executing a query in my bean method. I've done some research and i still got a code but it can't find the method that the method requires so i tried to added the query in my AppModule and i've added my method as a data control but how can i access it and modify it in my bean method?
The page with the code that doesn't find the method: http://jjzheng.blogspot.pt/2010/11/run-single-query-in-application-module.html
Which gives me: "Method 'getDBTransaction' not found"
The page that creates my method as a data control: http://amit-adf-work.blogspot.pt/2013/09/how-to-execute-sql-using-adf-application.html
Is any of this the right way? How can i execute a SQL Command in my bean class?
Regards,
Frederico.

This is the code I use
// GET A METHOD FROM PAGEDEF AND EXECUTE IT
// get the binding containe
BindingContainer bindings = BindingContext.getCurrent().getCurrentBindingsEntry();
// get an Action or MethodAction
OperationBinding method = bindings.getOperationBinding("YourMethodAction");
// if there are parameters to set...
Map paramsMap = method.getParamsMap();
paramsMap.put("param","value") ;
// execute the method
method.execute();
List errors = method.getErrors();
if (!errors.isEmpty())
// handle errors here errors is a list of exceptions!
// no error resume normal work
Timo

How to directly call business object class from backing bean class

I woul like to call business object class directly from the backing bean class and implement methods in BO. If possible can anyone give an example code.
Thanks in advance

Which problems are you occurring then? I really don't see problems. You're just free to access and invoke them.

Java.lang.ClassCastException in jsp trying to access session bean

Ok I'm totally stuck on this. I've been able to deploy my session bean facade to a bunch of entities bean with no problem. Now I'm trying to access the bean from a JSP. I can do a lookup ok, I can even do a PortableRemoteObject.narrow() ok, but when I try to actually cast the object I get an error. I can't understand why narrow works if the object is not of the correct type, when I do reflection I can verify that the object implements the interface I am trying to cast to. But when I do an instanceof the object from narrow is not the right type. I'm totally confused by this.
Here's my jsp,
<%@taglib uri="/com/sct/socrates/web/jsp/tld/UserAdmin.tld" prefix="UserAdmin" %>
<%@ page import="java.sql.*" %>
<%@ page import="javax.naming.*" %>
<%@ page import="com.sct.socrates.useradmin.model.UserAdminHome" %>
<%@page import="javax.rmi.PortableRemoteObject"%>
<html>
<body>
<pre>
<%
try {
InitialContext context = new InitialContext();
Object object1 = context.lookup("com.sct.socrates.useradmin.model.UserAdminHome");
out.println(object1.getClass().getName());
Object object2 = PortableRemoteObject.narrow(object1, UserAdminHome.class);
out.println(object2.getClass().getName());
if (object2 instanceof UserAdminHome) out.println("is instance");
Class[] list = object2.getClass().getInterfaces();
for(int i=0;i<list.length;i++)
out.println(list.getName());
UserAdminHome home = (UserAdminHome) object2;
} catch (Exception e){
e.printStackTrace();
%>
</pre>
</body>
</html>
Here's the output from the JSP,
com.sct.socrates.useradmin.model._UserAdminHome_Stub
com.sct.socrates.useradmin.model._UserAdminHome_Stub
com.sct.socrates.useradmin.model.UserAdminHome
Here's the server output,
FINE: for host 127.0.0.1 trying to GET /socrates/jsp/guest/test.jsp, ntrans-j2ee reports: mapped uri "/jsp/guest/test.jsp" in context "/socrates" to resource
FINE: context = StandardEngine[null].StandardHost[server1].StandardContext[socrates]
FINE: contextPath = /socrates
FINE: wrapper = StandardEngine[null].StandardHost[server1].StandardContext[socrates].StandardWrapper[jsp]
FINE: servletPath = /jsp/guest/test.jsp
FINE: pathInfo = null
FINE: SingleSignOn[server1]: Process request for '/socrates/jsp/guest/test.jsp'
FINE: SingleSignOn[server1]: Checking for SSO cookie
FINE: SingleSignOn[server1]: SSO cookie is not present
FINE: Authenticator[socrates]: Security checking request GET /socrates/jsp/guest/test.jsp
FINE: Authenticator[socrates]: Checking constraint 'SecurityConstraint[community]' against GET /jsp/guest/test.jsp --> false
FINE: Authenticator[socrates]: Checking constraint 'SecurityConstraint[user]' against GET /jsp/guest/test.jsp --> false
FINE: Authenticator[socrates]: Checking constraint 'SecurityConstraint[community]' against GET /jsp/guest/test.jsp --> false
FINE: Authenticator[socrates]: Checking constraint 'SecurityConstraint[moderator]' against GET /jsp/guest/test.jsp --> false
FINE: Authenticator[socrates]: Checking constraint 'SecurityConstraint[admin]' against GET /jsp/guest/test.jsp --> false
FINE: Authenticator[socrates]: No applicable constraint located
FINE: Authenticator[socrates]: Not subject to any constraint
FINE: JspEngine --> /jsp/guest/test.jsp
FINE: ServletPath: /jsp/guest/test.jsp
FINE: PathInfo: null
FINE: RealPath: E:\dev\app_server\sun\appserv\domains\domain1\server1\applications\j2ee-apps\socrates_3\socrates_war\jsp\guest\test.jsp
FINE: RequestURI: /socrates/jsp/guest/test.jsp
FINE: QueryString: null
FINE: ++++ Entered SecClientRequestInterceptor::send_request()
FINE: Security context is null (nothing to add to service context)
FINE: No SAS context element found in service context list
FINE: ++++ Entered SecClientRequestInterceptor::receive_reply
FINE: No SAS context element found in service context list
FINE: Status to be set : 0
FINE: Invoked receivedReply()
FINE: ++++ Entered SecClientRequestInterceptor::send_request()
FINE: Security context is null (nothing to add to service context)
FINE: No SAS context element found in service context list
FINE: ++++ Entered SecClientRequestInterceptor::receive_reply
FINE: No SAS context element found in service context list
FINE: Status to be set : 0
FINE: Invoked receivedReply()
FINE: service-j2ee: name = "com.sct.socrates.useradmin.model._UserAdminHome_Stub", codebase = ""
FINER: service-j2ee: (thread context class loader: WebappClassLoader
available:
delegate: false
repositories:
/WEB-INF/classes/
required:
----------> Parent Classloader:
EJB CL:
[com.iplanet.ias.loader.EJBClassLoader$URLEntry@e1df6e, com.iplanet.ias.loader.EJBClassLoader$URLEntry@13b9fb]
FINER: service-j2ee: class "com.sct.socrates.useradmin.model._UserAdminHome_Stub" found via codebase, defined by EJB CL:
[com.iplanet.ias.loader.EJBClassLoader$URLEntry@e1df6e, com.iplanet.ias.loader.EJBClassLoader$URLEntry@13b9fb]
FINE: ++++ Entered SecClientRequestInterceptor::send_request()
FINE: Security context is null (nothing to add to service context)
FINE: No SAS context element found in service context list
FINE: ++++ Entered SecClientRequestInterceptor::receive_reply
FINE: No SAS context element found in service context list
FINE: Status to be set : 0
FINE: Invoked receivedReply()
FINE: service-j2ee: name = "com.sct.socrates.useradmin.model._UserAdminHome_Stub", codebase = ""
FINER: service-j2ee: (thread context class loader: WebappClassLoader
available:
delegate: false
repositories:
/WEB-INF/classes/
required:
----------> Parent Classloader:
EJB CL:
[com.iplanet.ias.loader.EJBClassLoader$URLEntry@e1df6e, com.iplanet.ias.loader.EJBClassLoader$URLEntry@13b9fb]
FINER: service-j2ee: class "com.sct.socrates.useradmin.model._UserAdminHome_Stub" found via codebase, defined by EJB CL:
[com.iplanet.ias.loader.EJBClassLoader$URLEntry@e1df6e, com.iplanet.ias.loader.EJBClassLoader$URLEntry@13b9fb]
WARNING: CORE3283: stderr: java.lang.ClassCastException: com.sct.socrates.useradmin.model._UserAdminHome_Stub
WARNING: CORE3283: stderr: at jasper.jsp._guest._test_jsp._jspService(_test_jsp.java:89)
WARNING: CORE3283: stderr: at org.apache.jasper.runtime.HttpJspBase.service(Unknown Source)
WARNING: CORE3283: stderr: at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
WARNING: CORE3283: stderr: at com.iplanet.ias.web.jsp.JspServlet$JspServletWrapper.service(Unknown Source)
WARNING: CORE3283: stderr: at com.iplanet.ias.web.jsp.JspServlet.serviceJspFile(Unknown Source)
WARNING: CORE3283: stderr: at com.iplanet.ias.web.jsp.JspServlet.service(Unknown Source)
WARNING: CORE3283: stderr: at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
WARNING: CORE3283: stderr: at org.apache.catalina.core.StandardWrapperValve.invokeServletService(Unknown Source)
WARNING: CORE3283: stderr: at org.apache.catalina.core.StandardWrapperValve.access$000(Unknown Source)
WARNING: CORE3283: stderr: at org.apache.catalina.core.StandardWrapperValve$1.run(Unknown Source)
WARNING: CORE3283: stderr: at java.security.AccessController.doPrivileged(Native Method)
WARNING: CORE3283: stderr: at org.apache.catalina.core.StandardWrapperValve.invoke(Unknown Source)
WARNING: CORE3283: stderr: at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
WARNING: CORE3283: stderr: at org.apache.catalina.core.StandardContextValve.invoke(Unknown Source)
WARNING: CORE3283: stderr: at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
WARNING: CORE3283: stderr: at org.apache.catalina.core.StandardHostValve.invoke(Unknown Source)
WARNING: CORE3283: stderr: at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
WARNING: CORE3283: stderr: at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(Unknown Source)
WARNING: CORE3283: stderr: at com.iplanet.ias.web.WebContainer.service(Unknown Source)

Please configure the classloader to delegate to the parent loader by specifying the following in WEB-INF/sun-web.xml (the Sun ONE Application Server specific deployment descriptor for web applications)
<class-loader delegate="true"/>
More information on this can be found at
http://docs.sun.com/source/816-7150-10/dwdeploy.html#48102
Thanks,
Arvind

WPC: Access Java beans from XSL

Hi,
How can we access custom Java beans from within the XSLs used to render WPC webforms? Do we have to implement a custom XSLT Helper? I am able to access standard Java classes using the <xmlns> tag but when I try to reference our custom classes the WPC editor throws a ClassNotFound exception. Any help will be appreciated.
Thanks and Regards,
Shibendra

Hi,
How can we access custom Java beans from within the XSLs used to render WPC webforms? Do we have to implement a custom XSLT Helper? I am able to access standard Java classes using the <xmlns> tag but when I try to reference our custom classes the WPC editor throws a ClassNotFound exception. Any help will be appreciated.
Thanks and Regards,
Shibendra

Access session bean in ViewObjectImpl

Hi all,
Is it possible to access session bean (Managed bean) in ViewObjectImpl class?
The use case is that I hope to add a whereclause for the VO in a bounded task flow before a specific page fragment using that VO is loaded. Thanks for any advice~~
Andrew

Thanks for the reply.
So the only way to set a VO where clause before a page fragment is loaded is by :
public boolean refreshRegion(RegionContext regionContext) {
int refreshFlag = regionContext.getRefreshFlag();
if ((refreshFlag == 1 && !this.isPostback())) {
// set the VO where clause here...
Any declarative way like "invokeaction" in the binding of the page fragment to set the where clause? Thanks a lot~

Can servlet access Serializable Bean ?

This is my bean below.. My jsp pages can access this bean but my servlet cannot... Do I need to make remove the Serializable interface that I am implementing right now so servlet can access ? Can serlvet access beans ?
import java.io.*;
import java.sql.*;
import javax.sql.*;
import java.util.*;
* Re-usable database connection class
public class ConnectDB implements Serializable{
// setup connection values to the database
static final String DB_DRIVER = "";
static final String myURL = "";
static final String USERNAME = "";
static final String PASSWORD = "";
static Connection con = null;
     public ConnectDB(){}
     /* Returns a connection the file that calls the method*/
     public static Connection getConnection()
          try
               Class.forName("oracle.jdbc.driver.OracleDriver");
               con = DriverManager.getConnection("......");
          catch (Exception e)
               e.printStackTrace();
          finally
          return con;
     /*Closes Connections*/
     public static void closeConnection(Connection con)
          try
               if (con != null)
               con.commit();
               con.close();
          catch (Exception e)
               e.printStackTrace();
}

A Servlet is just a Java class and so can access beans. Also, a JSP is translated to a servlet before execution so you already have a servlet accessing the bean.
Can you post relevant code and error message?

"Bean Class Must Implement X" message, but bean class does implement X

When trying to deploy an .ear file on WebLogic 9.0 that contains an MDB EJB, I get a message like the following:
In EJB ITS-MDB(Application: ITSNO,
EJBComponent: ITSMDB.jar), the bean class must implement
its.common.TelnetMessageListener. '
The ITS-MDB EJB class (its.mdb.TelnetMessageListenerImpl) referenced in ejb-jar.xml DOES implement its.common.TelnetMessageListener, and both .class files exist in the same .jar file.
(The TelnetMessageListener interface extends javax.ejb.MessageDrivenBean.)
This .ear deploys without a problem on Oracle's OC4J and IBM's Websphere, so it appears that there is some Weblogic peculiarity (a bug, a different spec interpretation, etc.) causing the problem.
This problem is happening on Weblogic 9.0 using Java 1.5.0_03 on Windows XP.
Any ideas why this might be happening?

Thanks for the suggestion, Rob.
I checked to ensure that no out-dated TelnetMessageListenerImpl and TelnetMessageListener were being used. It looks like I am not using older versions.
I first checked the classpath specified by the log, and did not see anywhere in there that would contain either of these classes.
To be sure, I then decided to remove each class from the jar file and attempt to deploy it. If it succeeded, that would mean there was some other version of that file on the classpath.
I first removed TelnetMessageListenerImpl from ITSMDB.jar, and then tried deploying it. As expected, I received the following message:
Unable to deploy EJB: C:\bea\user_projects\domains\domain_good\.\servers\AdminServer\tmp\_WL_user\ITSNOMinus\fvdi9g\ITSMDB.jar from ITSMDB.jar:
Unable to load a class specified in your ejb-jar.xml: its.mdb.TelnetMessageListenerImpl
     at weblogic.ejb20.deployer.EJBModule.prepare(EJBModule.java:371)
     at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:90)
I then replaced TelnetMessageListenerImpl and attempted to remove TelnetMessageLister. I got a slightly different (but essentially the same) error:
java.lang.NoClassDefFoundError: oracle/wireless/its/common/TelnetMessageListener
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
     at weblogic.utils.classloaders.GenericClassLoader.defineClass(GenericClassLoader.java:302)
     at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:255)
     at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:223)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
     at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:158)
     at weblogic.ejb20.deployer.EJBModule.setupEJBToImplClassDependencies(EJBModule.java:1396)
Here is the exception stack I get will the original ITSNO deployment:
####<Sep 20, 2005 11:20:57 AM PDT> <Info> <Deployer> <jrozier-pc> <AdminServer> <[STANDBY] ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1127240457892> <BEA-149059> <Module ITSMDB.jar of application ITSNO is transitioning from STATE_NEW to STATE_PREPARED on server AdminServer.>
####<Sep 20, 2005 11:20:58 AM PDT> <Info> <EJB> <jrozier-pc> <AdminServer> <[STANDBY] ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1127240458002> <BEA-010008> <EJB Deploying file: ITSMDB.jar>
####<Sep 20, 2005 11:20:58 AM PDT> <Info> <Deployer> <jrozier-pc> <AdminServer> <[STANDBY] ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1127240458080> <BEA-149061> <Module ITSMDB.jar of application ITSNO failed to transition from STATE_NEW to STATE_PREPARED on server AdminServer.>
####<Sep 20, 2005 11:20:58 AM PDT> <Info> <Deployer> <jrozier-pc> <AdminServer> <[STANDBY] ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1127240458080> <BEA-149059> <Module ITSRA.rar of application ITSNO is transitioning from STATE_PREPARED to STATE_NEW on server AdminServer.>
####<Sep 20, 2005 11:20:58 AM PDT> <Info> <Deployer> <jrozier-pc> <AdminServer> <[STANDBY] ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1127240458111> <BEA-149060> <Module ITSRA.rar of application ITSNO successfully transitioned from STATE_PREPARED to STATE_NEW on server AdminServer.>
####<Sep 20, 2005 11:20:58 AM PDT> <Error> <Deployer> <jrozier-pc> <AdminServer> <[STANDBY] ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1127240458158> <BEA-149265> <Failure occured in the execution of deployment request with ID '1127240456080' for task '0'. Error is: 'weblogic.application.ModuleException: Exception preparing module: EJBModule(ITSMDB.jar)
Unable to deploy EJB: C:\bea\user_projects\domains\domain_good\.\servers\AdminServer\tmp\_WL_user\ITSNO\x5gd0k\ITSMDB.jar from ITSMDB.jar:
In EJB ITS-MDB(Application: ITSNO, EJBComponent: ITSMDB.jar), the bean class must implement its.common.TelnetMessageListener.
weblogic.application.ModuleException: Exception preparing module: EJBModule(ITSMDB.jar)
Unable to deploy EJB: C:\bea\user_projects\domains\domain_good\.\servers\AdminServer\tmp\_WL_user\ITSNO\x5gd0k\ITSMDB.jar from ITSMDB.jar:
In EJB ITS-MDB(Application: ITSNO, EJBComponent: ITSMDB.jar), the bean class must implement its.common.TelnetMessageListener.
     at weblogic.ejb20.deployer.EJBModule.prepare(EJBModule.java:371)
     at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:90)
     at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:318)
     at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
     at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:53)
     at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:43)
     at weblogic.application.internal.BaseDeployment$1.next(BaseDeployment.java:615)
     at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
     at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:236)
     at weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:147)
     at weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:61)
     at weblogic.deploy.internal.targetserver.operations.ActivateOperation.createAndPrepareContainer(ActivateOperation.java:191)
     at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doPrepare(ActivateOperation.java:84)
     at weblogic.deploy.internal.targetserver.operations.AbstractOperation.prepare(AbstractOperation.java:197)
     at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentPrepare(DeploymentManager.java:724)
     at weblogic.deploy.internal.targetserver.DeploymentManager.prepareDeploymentList(DeploymentManager.java:1137)
     at weblogic.deploy.internal.targetserver.DeploymentManager.handlePrepare(DeploymentManager.java:224)
     at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.prepare(DeploymentServiceDispatcher.java:109)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doPrepareCallback(DeploymentReceiverCallbackDeliverer.java:166)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$100(DeploymentReceiverCallbackDeliverer.java:12)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$2.run(DeploymentReceiverCallbackDeliverer.java:54)
     at weblogic.work.ServerWorkManagerImpl$WorkAdapterImpl.run(ServerWorkManagerImpl.java:518)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:207)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:179)
In EJB ITS-MDB(Application: ITSNO, EJBComponent: ITSMDB.jar), the bean class must implement its.common.TelnetMessageListener.
     at weblogic.ejb20.deployer.MessageDrivenBeanInfoImpl.initializeOnMessageMethodInfo(MessageDrivenBeanInfoImpl.java:593)
     at weblogic.ejb20.deployer.MessageDrivenBeanInfoImpl.<init>(MessageDrivenBeanInfoImpl.java:346)
     at weblogic.ejb20.deployer.BeanInfoImpl.createBeanInfoImpl(BeanInfoImpl.java:551)
     at weblogic.ejb20.deployer.MBeanDeploymentInfoImpl.initializeBeanInfos(MBeanDeploymentInfoImpl.java:597)
     at weblogic.ejb20.deployer.MBeanDeploymentInfoImpl.<init>(MBeanDeploymentInfoImpl.java:221)
     at weblogic.ejb20.deployer.EJBDeployer.prepare(EJBDeployer.java:1165)
     at weblogic.ejb20.deployer.EJBModule.prepare(EJBModule.java:344)
     at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:90)
     at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:318)
     at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
     at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:53)
     at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:43)
     at weblogic.application.internal.BaseDeployment$1.next(BaseDeployment.java:615)
     at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
     at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:236)
     at weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:147)
     at weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:61)
     at weblogic.deploy.internal.targetserver.operations.ActivateOperation.createAndPrepareContainer(ActivateOperation.java:191)
     at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doPrepare(ActivateOperation.java:84)
     at weblogic.deploy.internal.targetserver.operations.AbstractOperation.prepare(AbstractOperation.java:197)
     at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentPrepare(DeploymentManager.java:724)
     at weblogic.deploy.internal.targetserver.DeploymentManager.prepareDeploymentList(DeploymentManager.java:1137)
     at weblogic.deploy.internal.targetserver.DeploymentManager.handlePrepare(DeploymentManager.java:224)
     at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.prepare(DeploymentServiceDispatcher.java:109)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doPrepareCallback(DeploymentReceiverCallbackDeliverer.java:166)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$100(DeploymentReceiverCallbackDeliverer.java:12)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$2.run(DeploymentReceiverCallbackDeliverer.java:54)
     at weblogic.work.ServerWorkManagerImpl$WorkAdapterImpl.run(ServerWorkManagerImpl.java:518)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:207)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:179)
>
####<Sep 20, 2005 11:20:58 AM PDT> <Warning> <Deployer> <jrozier-pc> <AdminServer> <[STANDBY] ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1127240458252> <BEA-149004> <Failures were detected while initiating distribute task for application 'ITSNO'.>
####<Sep 20, 2005 11:20:58 AM PDT> <Warning> <Deployer> <jrozier-pc> <AdminServer> <[STANDBY] ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1127240458252> <BEA-149078> <Stack trace for message 149004
There are a few other updates since my first post as well:
(1) I get the same message when I try to deploy just ITSMDB.jar as an application as I do when I try to deploy my ITSNO.ear (which contains both an RA and the MDB).
(2) This same application now also works on JBoss. (I had to add a jboss.xml to tell the MDB about the RA.)
(3) I fixed the ejb-jar.xml container-transaction element to refer to ITS-MDB (with a dash) instead of ITS_MDB (with an underscore). (This fix goes to show that some containers are more forgiving than others--OC4J and Websphere did not complain about it, but JBoss gave an error message and would not deploy until this was fixed.)

I hv err on accessing my bean class to a servlet class, plz guide me.

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