GetId () returns 0 for CMP Entity Bean
Hi
I'm currently using the HR OE schema that you can download from otn to do some test with EJBs. After creating an CMP Entity Bean, deploying it to the container that comes with JDeveloper9i and accesing it via the Sample Client I get 0 for the id column. All other columns works fine the only one showing a value of 0 is the id column.
I have created a CMP bean and when I use the create method,it inserts 0 in the primary key filed.This only happens if I do not supply a value for that field in the method.So try to check the create method and make sure that the primary key argument is there.In other words,oracle container inserts 0 in the primary key filed if no argument is supplied.
Regards,
Madani
Similar Messages
-
Using oracle db sequence for auto generating of PKs for CMP entity beans
Hi,
I have read quite a number of threads about (auto) generation of keys for primary keys for the CMP entity beans.
My requirement is I am migrating an application deployed on Weblogic to oc4j. The application is using cmp entity beans with auto key generation using a sequence in the Oracle db. This is specified in weblogic-cmp-rdbms-jar.xml file like below:
<automatic-key-generation>
<generator-type>Oracle</generator-type>
<generator-name>REPUSER.DEPT_REPORT_SEQ</generator-name>
<key-cache-size>1</key-cache-size>
</automatic-key-generation>
In the ejb-jar.xml, it is specified as:
<prim-key-class>java.lang.Integer</prim-key-class>
<primkey-field>id</primkey-field>
Now, I need to migrate this to oc4j. Can somebody suggest me options and clarify my questions kindly?
1) I have read articles that say that in the ejb-jar.xml, we need to specify <prim-key-class>java.lang.Object</prim-key-class> and this will create a column called 'autoid' in the respective entity table in the Oracle db.
- How can I use this to assign the value to my primary field, say, id?
2) Now, with the latest oc4j, can I use Oracle database sequence as the key generator for the values of the PKs just by specifying in the xml descriptor ejb-jar.xml?
2.a) If yes, is there any article that explains with the code?
2.b) If no, what are the alternatives I have?
I have read many discussions that say that we can create a stateless session bean that can lookup the database sequence using simple JDBC call to return the nextval of the sequence. The SSB should be called in the ejbCreate() of the entity bean.
My related question is, what is recommended for oc4j? What are limitations of the various options for the latest oc4j available?
How should I go about deploying this kind of ejbs in oc4j?
Any help and pointers are welcome. Please help.
Thanks a lot.
VadiHello ,
Instead of exposing a get/set method for each arribute of your bean (corresponding to database table) expose only one object.
For example
public class CustomerBean implements javax.ejb.EntityBean{
private CustomerVO objCustomer;
private String customerName;
private String customerMail;
private String customerType;
public CustomerVO getCustomer(){
return this.objCustomer;
public void setCustomer(CustomerVO objCustomer){
this.objCustomer = objCustomer;
public void ejbStore(){
customerName = objCustomer.getName();
customerMail = objCustomer.getMail();
customerType = objCustomer.getType();
HTH
VJ -
RE: Consuming and Creating a CMP Entity Bean
Hi There,
I have been trying to find an answer for 1 day. I don't know ehre to look next.
I am creating a CMP entity bean. I have created all the set and get mehtods as abstract functions. I have added a ejbCreate and a matching ejbPostCreate. The class code looks like this.
public abstract class COrderBean implements EntityBean {
protected EntityContext entctx;
//abstract declarations of property accessors
public abstract int getId();
public abstract void setId(int intid);
public abstract String getCustomerID();
public abstract void setCustomerID(String strcustomerid);
public abstract Date getDate();
public abstract void setDate(Date datorder);
public abstract String getNotes();
public abstract void setNotes(String strnotes);
public void ejbActivate() {}
public void ejbPassivate() {}
public void ejbRemove() {}
public void ejbLoad() {}
public void ejbStore() {}
public void setEntityContext(EntityContext context)
entctx = context;
public void unsetEntityContext()
entctx = null;
public COrderPK ejbCreate()
return null;
public COrderPK ejbCreate(int new_id, String new_customerid, Date new_order_date, String new_notes) throws CreateException
setId(new_id);
setCustomerID(new_customerid);
setDate(new_order_date);
setNotes(new_notes);
return new COrderPK(getId());
public void ejbPostCreate(int id, String customerid, Date order_date, String notes) {}
My client code works with both BMP entity beans and session beans. It is shown below. I am working with Sun's Application Server 8.0 and I created the database schema with the capture-schema.exe command.
Properties prps = new Properties();
props.put("javax.rmi.CORBA.UtilClass","com.sun.corba.ee.impl.javax.rmi.CORBA.Util");
props.put("org.omg.CORBA.ORBClass","com.sun.corba.ee.impl.orb.ORBImpl");
props.put("org.omg.CORBA.ORBSingletonClass","com.sun.corba.ee.impl.orb.ORBSingleton");
Context context = new InitialContext(props);
Object obj = context.lookup("corbaname:iiop:localhost:3700#COrderBean");
//Object obj = context.lookup("entitybean.OrderItem");
IOrderHome home = (IOrderHome)PortableRemoteObject.narrow(obj,Class.forName("ctaejb.entitybean.order.IOrderHome"));
//use create
IOrderRemote remote = home.findByPrimaryKey(new COrderPK(1));
System.out.println(remote.getDate().toString());
I am getting the follwing error. Can someone please help. Thanks in advance.
WARNING: "IOP00810257: (MARSHAL) Could not find class"
org.omg.CORBA.MARSHAL: vmcid: SUN minor code: 257 completed: Maybe
at com.sun.corba.ee.impl.logging.ORBUtilSystemException.couldNotFindClass(ORBUtilSystemException.java:7987)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:1013)
at com.sun.corba.ee.impl.encoding.CDRInputStream.read_value(CDRInputStream.java:259)
at com.sun.corba.ee.impl.io.IIOPInputStream.inputObjectField(IIOPInputStream.java:1989)
at com.sun.corba.ee.impl.io.IIOPInputStream.inputClassFields(IIOPInputStream.java:2213)
at com.sun.corba.ee.impl.io.IIOPInputStream.inputObject(IIOPInputStream.java:1221)
at com.sun.corba.ee.impl.io.IIOPInputStream.simpleReadObject(IIOPInputStream.java:400)
at com.sun.corba.ee.impl.io.ValueHandlerImpl.readValueInternal(ValueHandlerImpl.java:330)
at com.sun.corba.ee.impl.io.ValueHandlerImpl.readValue(ValueHandlerImpl.java:296)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:1034)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:879)
at com.sun.corba.ee.impl.encoding.CDRInputStream.read_value(CDRInputStream.java:255)
at com.sun.corba.ee.spi.servicecontext.UEInfoServiceContext.<init>(UEInfoServiceContext.java:30)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at com.sun.corba.ee.spi.servicecontext.ServiceContextData.makeServiceContext(ServiceContextData.java:114)
at com.sun.corba.ee.spi.servicecontext.ServiceContexts.unmarshal(ServiceContexts.java:195)
at com.sun.corba.ee.spi.servicecontext.ServiceContexts.get(ServiceContexts.java:365)
at com.sun.corba.ee.spi.servicecontext.ServiceContexts.get(ServiceContexts.java:353)
at com.sun.corba.ee.impl.protocol.CorbaClientRequestDispatcherImpl.processResponse(CorbaClientRequestDispatcherImpl.java:470)
at com.sun.corba.ee.impl.protocol.CorbaClientRequestDispatcherImpl.marshalingComplete(CorbaClientRequestDispatcherImpl.java:327)
at com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.invoke(CorbaClientDelegateImpl.java:158)
at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:129)
at com.sun.corba.ee.impl.presentation.rmi.bcel.BCELStubBase.invoke(Unknown Source)
at ctaejb.entitybean.order._IOrderHome_DynamicStub.findByPrimaryKey(_IOrderHome_DynamicStub.java)
at mainapp.CTestApplication.main(CTestApplication.java:32)
Caused by: java.lang.ClassNotFoundException
... 27 more
org.omg.CORBA.UNKNOWN: vmcid: 0x0 minor code: 0 completed: Maybe
at com.sun.corba.ee.spi.servicecontext.UEInfoServiceContext.<init>(UEInfoServiceContext.java:34)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at com.sun.corba.ee.spi.servicecontext.ServiceContextData.makeServiceContext(ServiceContextData.java:114)
at com.sun.corba.ee.spi.servicecontext.ServiceContexts.unmarshal(ServiceContexts.java:195)
at com.sun.corba.ee.spi.servicecontext.ServiceContexts.get(ServiceContexts.java:365)
at com.sun.corba.ee.spi.servicecontext.ServiceContexts.get(ServiceContexts.java:353)
at com.sun.corba.ee.impl.protocol.CorbaClientRequestDispatcherImpl.processResponse(CorbaClientRequestDispatcherImpl.java:470)
at com.sun.corba.ee.impl.protocol.CorbaClientRequestDispatcherImpl.marshalingComplete(CorbaClientRequestDispatcherImpl.java:327)
at com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.invoke(CorbaClientDelegateImpl.java:158)
at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:129)
at com.sun.corba.ee.impl.presentation.rmi.bcel.BCELStubBase.invoke(Unknown Source)
at ctaejb.entitybean.order._IOrderHome_DynamicStub.findByPrimaryKey(_IOrderHome_DynamicStub.java)
at mainapp.CTestApplication.main(CTestApplication.java:32)Forget it. All the code works. I didn't know that the Sun App Server required a Persistence Manager to work with CMP entity beans. Once I added the persistence manager, all was OK. Have a good day.
-
RE: Accessing a CMP Entity Bean
Hi There,
I have written a couple of CMP entity beans. When I run the client application, I am getting a ORB minor code 257. The error message follows. My code works with both BMP entity beans and session beans. Can anyone help? Thanks in advance.
Aug 21, 2005 10:24:57 PM com.sun.corba.ee.impl.encoding.CDRInputStream_1_0 read_value
WARNING: "IOP00810257: (MARSHAL) Could not find class"
org.omg.CORBA.MARSHAL: vmcid: SUN minor code: 257 completed: Maybe
at com.sun.corba.ee.impl.logging.ORBUtilSystemException.couldNotFindClass(ORBUtilSystemException.java:7987)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:1013)
at com.sun.corba.ee.impl.encoding.CDRInputStream.read_value(CDRInputStream.java:259)
at com.sun.corba.ee.impl.io.IIOPInputStream.inputObjectField(IIOPInputStream.java:1989)
at com.sun.corba.ee.impl.io.IIOPInputStream.inputClassFields(IIOPInputStream.java:2213)
at com.sun.corba.ee.impl.io.IIOPInputStream.inputObject(IIOPInputStream.java:1221)
at com.sun.corba.ee.impl.io.IIOPInputStream.simpleReadObject(IIOPInputStream.java:400)
at com.sun.corba.ee.impl.io.ValueHandlerImpl.readValueInternal(ValueHandlerImpl.java:330)
at com.sun.corba.ee.impl.io.ValueHandlerImpl.readValue(ValueHandlerImpl.java:296)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:1034)
at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:879)
at com.sun.corba.ee.impl.encoding.CDRInputStream.read_value(CDRInputStream.java:255)
at com.sun.corba.ee.spi.servicecontext.UEInfoServiceContext.<init>(UEInfoServiceContext.java:30)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at com.sun.corba.ee.spi.servicecontext.ServiceContextData.makeServiceContext(ServiceContextData.java:114)
at com.sun.corba.ee.spi.servicecontext.ServiceContexts.unmarshal(ServiceContexts.java:195)
at com.sun.corba.ee.spi.servicecontext.ServiceContexts.get(ServiceContexts.java:365)
at com.sun.corba.ee.spi.servicecontext.ServiceContexts.get(ServiceContexts.java:353)
at com.sun.corba.ee.impl.protocol.CorbaClientRequestDispatcherImpl.processResponse(CorbaClientRequestDispatcherImpl.java:470)
at com.sun.corba.ee.impl.protocol.CorbaClientRequestDispatcherImpl.marshalingComplete(CorbaClientRequestDispatcherImpl.java:327)
at com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.invoke(CorbaClientDelegateImpl.java:158)
at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:129)
at com.sun.corba.ee.impl.presentation.rmi.bcel.BCELStubBase.invoke(Unknown Source)
at ctaejb.entitybean.order._IOrderHome_DynamicStub.findByPrimaryKey(_IOrderHome_DynamicStub.java)
at mainapp.CTestApplication.main(CTestApplication.java:32)
Caused by: java.lang.ClassNotFoundException
... 27 more
org.omg.CORBA.UNKNOWN: vmcid: 0x0 minor code: 0 completed: Maybe
at com.sun.corba.ee.spi.servicecontext.UEInfoServiceContext.<init>(UEInfoServiceContext.java:34)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at com.sun.corba.ee.spi.servicecontext.ServiceContextData.makeServiceContext(ServiceContextData.java:114)
at com.sun.corba.ee.spi.servicecontext.ServiceContexts.unmarshal(ServiceContexts.java:195)
at com.sun.corba.ee.spi.servicecontext.ServiceContexts.get(ServiceContexts.java:365)
at com.sun.corba.ee.spi.servicecontext.ServiceContexts.get(ServiceContexts.java:353)
at com.sun.corba.ee.impl.protocol.CorbaClientRequestDispatcherImpl.processResponse(CorbaClientRequestDispatcherImpl.java:470)
at com.sun.corba.ee.impl.protocol.CorbaClientRequestDispatcherImpl.marshalingComplete(CorbaClientRequestDispatcherImpl.java:327)
at com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.invoke(CorbaClientDelegateImpl.java:158)
at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:129)
at com.sun.corba.ee.impl.presentation.rmi.bcel.BCELStubBase.invoke(Unknown Source)
at ctaejb.entitybean.order._IOrderHome_DynamicStub.findByPrimaryKey(_IOrderHome_DynamicStub.java)
at mainapp.CTestApplication.main(CTestApplication.java:32)This is probably not the best forum to get an answer. Try this one instead:
http://forum.java.sun.com/forum.jspa?forumID=13
Its difficult to know exactly the source of your problem. If your code works for session beans and Entity beans using BMP then I can only think of the following:
In a CMP Bean, the ejbLoad and ejbStore methods do nothing. The container performs the load and store for you. I don't know whether leaving code in these methods will cause any problems though.
You will need to make a few changes to your ejbCreate method though. Suppose your ejbCreate method looks like this:
public PersonKey ejbCreate(String aFirstName, String aLastName) You still need to initialise the firstName and lastName fields in the bean.
firstName = aFirstName;
lastName = aLastName;Normally, the ejbCreate method returns the key value for the created object. Using CMP, you must return null. The container generates the new key value and returns it to the client.
Not sure if that will help. Post on the link above if not.
Simon -
Problem in creating CMP Entity Bean - Pls Help
I am trying to build one simple project having jsps to get connected to CMP Entity Bean.
But while deploying I am getting the following error...
Nov 15, 2004 10:59:09... Info: End of log messages of the target system.
Nov 15, 2004 10:59:09... Info: ***** End of SAP J2EE Engine Deployment (J2EE Application) *****
Nov 15, 2004 10:59:09... Error: Execution of deployment action for "EntityCMPAppln" aborted:
Caught exception during application deployment from SAP J2EE Engine's deploy service:
java.rmi.RemoteException: Error occurred while starting application bcone.com/EntityCMPAppln and wait.
Reason: Complex error : server ID 6155350:Application bcone.com/EntityCMPAppln cannot be started, because it has hard reference to resource CONFIG_DB with type javax.sql.DataSource, but it is not active on the server.
(message ID: com.sap.sdm.serverext.servertype.inqmy.extern.EngineApplOnlineDeployerImpl.performAction(DeploymentActionTypes).REMEXC)
Nov 15, 2004 10:59:09... Error: Deployment NOT successful for EntityCMPAppln
Nov 15, 2004 10:59:09... Info: SDM configuration: Do not automatically start/stop J2EE Engine. Do not restore state of J2EE Engine now.
Nov 15, 2004 10:59:09... Error: -
At least one of the Deployments failed -
Nov 15, 2004 11:05:16... Info: Request for Logon as admin accepted
===========================================
Nov 15, 2004 11:05:08... Info: = Starting to execute command 'remotegui' =
Nov 15, 2004 11:05:08... Info: ===============================================
Nov 15, 2004 11:05:10... Info: SDM started successfully.
Please tell me how to activate the CONFIG_DB reference in database. Or what Extra I have to do to run this example.
Regards,
Vivek OjhaDear Benny,
The code of the required files is pasted below....
Application.XML
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE application PUBLIC "-//Sun Microsystems, Inc.//DTD J2EE Application 1.3//EN"
"http://java.sun.com/dtd/application_1_3.dtd">
<application>
<display-name>EntityCMPAppln</display-name>
<description>EAR description</description>
<module>
<ejb>EntityCMPEjb.jar</ejb>
</module>
<module>
<web>
<web-uri>EntityCMPWeb.war</web-uri>
<context-root>/student</context-root>
</web>
</module>
</application>
Application-j2ee-engine.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE application-j2ee-engine SYSTEM "application-j2ee-engine.dtd">
<application-j2ee-engine>
<provider-name>bcone.com</provider-name>
<fail-over-enable
mode="disable"/>
</application-j2ee-engine>
data-source-aliases.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE data-source-aliases SYSTEM "data-source-aliases.dtd">
<data-source-aliases>
<aliases>
<data-source-name>${com.sap.datasource.default}</data-source-name>
<alias>STUDENTDB</alias>
</aliases>
</data-source-aliases>
ejb-j2ee-engine.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-j2ee-engine SYSTEM "ejb-j2ee-engine.dtd">
<ejb-j2ee-engine>
<enterprise-beans>
<enterprise-bean>
<ejb-name>StudentBean</ejb-name>
<resource-ref>
<res-ref-name>jdbc/STUDENTDB</res-ref-name>
<res-link>STUDENTDB</res-link>
</resource-ref>
<entity-props/>
</enterprise-bean>
</enterprise-beans>
</ejb-j2ee-engine>
ejb-jar.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">
<ejb-jar>
<description>EJB JAR description</description>
<display-name>EJB JAR</display-name>
<enterprise-beans>
<entity>
<ejb-name>StudentBean</ejb-name>
<home>com.bcone.ejb.StudentHome</home>
<remote>com.bcone.ejb.Student</remote>
<ejb-class>com.bcone.ejb.StudentBean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.String</prim-key-class>
<reentrant>False</reentrant>
<cmp-version>2.x</cmp-version>
<abstract-schema-name>StudentBean</abstract-schema-name>
<cmp-field>
<field-name>studentId</field-name>
</cmp-field>
<cmp-field>
<field-name>lname</field-name>
</cmp-field>
<cmp-field>
<field-name>standard</field-name>
</cmp-field>
<cmp-field>
<field-name>fyear</field-name>
</cmp-field>
<cmp-field>
<field-name>fname</field-name>
</cmp-field>
<primkey-field>studentId</primkey-field>
<resource-ref>
<res-ref-name>jdbc/STUDENTDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</entity>
</enterprise-beans>
</ejb-jar>
persistent.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE persistent-ejb-map SYSTEM "persistent.dtd">
<persistent-ejb-map>
<locking
type="Table"/>
<db-properties>
<data-source-name>CONFIG_DB</data-source-name>
<database-vendor
name="SAPDB"/>
</db-properties>
<entity-beans>
<entity-bean>
<ejb-name>StudentBean</ejb-name>
<table-name>TMP_STUDENTNEW</table-name>
<field-map
key-type="PrimaryKey">
<field-name>studentId</field-name>
<column>
<column-name>STUDENTID</column-name>
</column>
</field-map>
<field-map
key-type="NoKey">
<field-name>lname</field-name>
<column>
<column-name>LNAME</column-name>
</column>
</field-map>
<field-map
key-type="NoKey">
<field-name>standard</field-name>
<column>
<column-name>STANDARD</column-name>
</column>
</field-map>
<field-map
key-type="NoKey">
<field-name>fyear</field-name>
<column>
<column-name>FYEAR</column-name>
</column>
</field-map>
<field-map
key-type="NoKey">
<field-name>fname</field-name>
<column>
<column-name>FNAME</column-name>
</column>
</field-map>
</entity-bean>
</entity-beans>
<relationships/>
</persistent-ejb-map>
StudentBean.java
package com.bcone.ejb;
import javax.ejb.EntityBean;
import javax.ejb.EntityContext;
import javax.ejb.RemoveException;
import javax.ejb.CreateException;
@abstractSchemaName StudentBean
@cmpVersion 2.x
@ejbHome <{com.bcone.ejb.StudentHome}>
@ejbPrimaryKey <{java.lang.String}>
@ejbRemote <{com.bcone.ejb.Student}>
@hasSimplePK true
public abstract class StudentBean implements EntityBean {
public void ejbLoad() {
public void ejbStore() {
public void ejbRemove() throws RemoveException {
public void ejbActivate() {
public void ejbPassivate() {
public void setEntityContext(EntityContext context) {
myContext = context;
public void unsetEntityContext() {
myContext = null;
private EntityContext myContext;
@primKeyField
public abstract String getStudentId();
public abstract void setStudentId(String studentId);
public abstract String getLname();
public abstract void setLname(String lname);
public abstract String getFname();
public abstract void setFname(String fname);
public abstract String getStandard();
public abstract void setStandard(String standard);
public abstract String getFyear();
public abstract void setFyear(String fyear);
Create Method.
public String ejbCreate(
String studentId,
String fname,
String lname,
String standard,
String fyear)
throws CreateException {
setStudentId(studentId);
setFname(fname);
setLname(lname);
setStandard(standard);
setFyear(fyear);
return null;
Post Create Method.
public void ejbPostCreate(
String studentId,
String fname,
String lname,
String standard,
String fyear) {
// TODO : Implement
StudentData.java
Created on Nov 14, 2004
To change the template for this generated file go to
Window>Preferences>Java>Code Generation>Code and Comments
package com.bcone.data;
@author Administrator
To change the template for this generated type comment go to
Window>Preferences>Java>Code Generation>Code and Comments
public class StudentData {
private String studentId;
private String fname;
private String lname;
private String standard;
private String fyear;
@return
public String getFname() {
return fname;
@return
public String getFyear() {
return fyear;
@return
public String getLname() {
return lname;
@return
public String getStandard() {
return standard;
@return
public String getStudentId() {
return studentId;
@param string
public void setFname(String string) {
fname = string;
@param string
public void setFyear(String string) {
fyear = string;
@param string
public void setLname(String string) {
lname = string;
@param string
public void setStandard(String string) {
standard = string;
@param string
public void setStudentId(String string) {
studentId = string;
student.jsp
<%@ page language="java" %>
<html>
<head>
<title>
Title
</title>
</head>
<body>
<form method="POST" action="WEBBOT-SELF" name="Student" onSubmit="">
<!--webbot bot="SaveResults" startspan U-File="_private/form_results.txt"
S-Format="TEXT/CSV" S-Label-Fields="TRUE" ><input TYPE="hidden" NAME="VTI-GROUP" VALUE="0"><!webbot
bot="SaveResults" endspan -->
<br>
<a href="/student/manageStudent.jsp?action=add" method="post"> Create </a>
<a href="/student/manageStudent.jsp?action=modify" method="post"> Modify </a>
<a href="/student/manageStudent.jsp?action=delete" method="post"> Delete </a>
<br><br>
<table border="1" width="32%">
<tr>
<td width="39%">Student ID </td>
<td width="61%"><input type="text" name="studentId" size="20"></td>
</tr>
<tr>
<td width="39%">First Name</td>
<td width="61%"><input type="text" name="fname" size="20"></td>
</tr>
<tr>
<td width="39%">Last Name</td>
<td width="61%"><input type="text" name="lname" size="20"></td>
</tr>
<tr>
<td width="39%">Standard</td>
<td width="61%"><input type="text" name="standard" size="20"></td>
</tr>
<tr>
<td width="39%">Fiscal Year</td>
<td width="61%"><input type="text" name="fyear" size="20"></td>
</tr>
<tr>
<td width="39%" align="center"><input type="submit" value="Submit" name="submit"></td>
<td width="61%" align="center"><input type="reset" value="Reset" name="reset"></td>
</tr>
</table>
</form>
</body>
</html>
mamageStudent.jsp
<%@ page language="java"
import="javax.naming.,java.sql.,javax.sql,com.bcone.ejb."
%>
<html>
<head>
<title>
Manage Student
</title>
</head>
<body>
<h1>
</h1>
<jsp:useBean id="stu" class="com.bcone.data.StudentData" ></jsp:useBean>
<jsp:setProperty name="stu" property="*" />
<%
try {
InitialContext ctx = new InitialContext();
StudentHome home = (StudentHome) ctx.lookup("java:comp/env/StudentBean");
String str = request.getParameter("action");
if("action".equals(str)) {
Student rem = home.create(remote.setFname(stu.getStudentId(),stu.getFname(),stu.getLname(),stu.getStandard(),stu.getFyear());
out.println(stu.getStudentId() + "Student Created");
} else if ("modify".equals(str)) {
Student remote = home.findByPrimaryKey(stu.getStudentId());
remote.setFname(stu.getFname());
remote.setFname(stu.getLname());
remote.setFname(stu.getStandard());
remote.setFname(stu.getFyear());
out.println(stu.getStudentId() + "Student modified");
} else if ("delete".equals(str)) {
Student stu1 = home.findByPrimaryKey(stu.getStudentId());
stu1.remove();
out.println(stu.getStudentId() + "Student deleted");
} catch (Exception e) {
out.println("Exception e"+e.toString());
%>
</body>
</html>
Regards,
Vivek Ojha -
Problem with return cardinality of my Entity-Bean
Hi all,
i'm using Sun Java Studio Enterprise 8.1 and i try to create a EJB CMP Entity-Bean, it's name is Customer. But i become an error during the deploy. By the method findByName(String name) i selected as return cardinality "Many" and become below error. If i select "One" as return cardinality then is this error away.
What is here wrong? Every time when i create an EntityBean i become this error, but just by "Many" return cardinality. Can anyone help me to solve this problem?
thanks
Bean : CustomerBean
Method : public abstract Collection findByName(String) throws FinderException
Section: 10.5.6
Warning: Every finder method except findByPrimaryKey(key) must be associated with a query element in the deployment descriptor.
01:06:32,031 ERROR [MainDeployer] Could not create deployment: file:/C:/jboss-4.0.3SP1/server/default/tmp/deploy/tmp26541bank.ear-co
ntents/Bank-ejb.jar
org.jboss.deployment.DeploymentException: Verification of Enterprise Beans failed, see above for error messages.
at org.jboss.ejb.EJBDeployer.create(EJBDeployer.java:575)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:118)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:127)
at org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:80)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
at $Proxy24.create(Unknown Source)
at org.jboss.deployment.MainDeployer.create(MainDeployer.java:935)
at org.jboss.deployment.MainDeployer.create(MainDeployer.java:925)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:789)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:753)
at sun.reflect.GeneratedMethodAccessor49.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:118)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:127)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
at $Proxy9.deploy(Unknown Source)
at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:319)
at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:489)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:192)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScanner.java:203)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:182)
01:07:17,406 INFO [EJBDeployer] Undeploying: file:/C:/jboss-4.0.3SP1/server/default/tmp/deploy/tmp26541bank.ear-contents/Bank-ejb.j
arAs you have noted, for 'One' cardinality findByPrimaryKey is sufficient since a primary key is used to locate unique records. But for 'many' cardinality, the system needs to know how to locate a collection of records and hence the need for findAll in the specification.
Regarding EJB 3.0, i suggest that you use NetBeans.
Note: Java Studio Enterprise 8.1 is itself built on top of NetBeans version 5.0. NetBeans is an ide developed as opensource at www.netbeans.org; it is extensible ide and so add-on modules can be developed to run on top of netbeans. And that is what JSE8.1 does; JSE 8.1 is NetBeans 5.0 plus several add-on modules (like UML etc).
The latest stable version of NetBeans is 5.5.1 and NetBeans 6.0 is currently under development with milestone 10 being the latest release.
Home page: www.netbeans.org
Download: http://www.netbeans.info/downloads/index.php (From the main page, you can also download several packs which are addons that provide various functionality).
Docs: http://www.netbeans.org/kb/index.html
Docs on EE apps: http://www.netbeans.org/kb/trails/java-ee.html
Further community resources (mailing lists, issue tracking etc) : http://www.netbeans.org/community/index.html
wiki.netbeans.org
NetBeans download is free. And since it is developed as an opensource project, the source is freely available under CDDL license (http://www.netbeans.org/about/legal/license.html) -
Help:How to manage relationships in CMP Entity beans
Hi everybody;
I am using Oracle JDeveloper 9i release 2 and Oracle 9i database.
How can I manage one-to-many and many-to-many relationships in a CMP Entity Bean, I tried to managed the relationships in code, calling the beans, searching for records, making loops and joining.
Is there a better way to manage the relationships with out doing this in code?
Because I think it is not good for performance.
Regards Franciscopublic void selectCurriculum(ValueChangeEvent event){
logger.info(event.getNewValue().getClass());
Integer id = (Integer) event.getNewValue();
Collection curriculums = curriculums().getCurriculums();
ObjectCurriculum curriculum = null;
for (Iterator iterator = curriculums.iterator(); iterator.hasNext();) {
ObjectCurriculum objectCurriculum = (ObjectCurriculum) iterator.next();
if(objectCurriculum.getId().equals(id)){
curriculum = objectCurriculum;
break;
curriculum().setWholeObject(curriculum);
logger.info("setting current curriculum");
no message is logged -
Help about Date and Time by CMP entity bean
I should have two fields in my cmp .one stores current date ,another one stores current time while ejbcreate();
I should be able to get findmethod findobjectBetween ?! and ?2
or that sorts of find method.what type of the method should I use.
java.util.Date or Simply String?
if I use java.tuil.Date as the type.
How shoud my ejbcreate method look like?
public abstract void setDate(Date mydate);
public abstract Date getDate();
ejbCreate(String name,String password,Date mydate,Date mytime)
setDate()
I suppose I use write a business method getCurrentDate() which uses
java.util.Date().toLocale,But I think it just returns String
help pls.I am using oc4j(Oracle9iAS (9.0.3.0.0))
I am getting the following error using Timestamp while deploying cmp entity bean ejb1.1. Thanks...
Auto-deploying TimestampTestEntity.jar (No previous deployment found)... TimestampTest_EntityBeanWrapper0.java:1558: Missing term.
if (if(thread.contextContainer != null)
^
TimestampTest_EntityBeanWrapper0.java:1558: ')' expected.
if (if(thread.contextContainer != null)
^
TimestampTest_EntityBeanWrapper0.java:1559: Invalid expression statement.
response != null) {if(thread.contextContainer != null)
^
TimestampTest_EntityBeanWrapper0.java:1559: ';' expected.
response != null) {if(thread.contextContainer != null)
^
TimestampTest_EntityBeanWrapper0.java:1560: Missing term.
response.setNanos(if(thread.contextContainer != null)
^
TimestampTest_EntityBeanWrapper0.java:1560: ')' expected.
response.setNanos(if(thread.contextContainer != null)
^
TimestampTest_EntityBeanWrapper0.java:1561: ';' expected.
response.getNanos());} // generated from BeanMethodCompilation
^
7 errors
Error compiling F:\oc4j\j2ee\home\applications\TimestampAppl/TimestampTestEntity.jar: Syntax error in source
Oracle9iAS (9.0.3.0.0) Containers for J2EE initialized -
Error While Deploying A CMP Entity Bean With A Composite Primary Key
Hello all,
I have a problem deploying CMP Entity beans with composite primary keys. I have a CMP Entity Bean, which contains a composite primary key composed of two local stubs. If you know more about this please respond to my post on the EJB forum (subject: CMP Bean Local Stub as a Field of a Primary Key Class).
In the mean time, can you please tell me what following error message means and how to resolve it? From what I understand it might be a problem with Sun ONE AS 7, but I would like to make sure it's not me doing something wrong.
[05/Jan/2005:12:49:03] WARNING ( 1896): Validation error in bean CustomerSubscription: The type of non-static field customer of the key class
test.subscription.CustomerSubscriptionCMP_1530383317_JDOState$Oid must be primitive or must implement java.io.Serializable.
Update the type of the key class field.
Warning: All primary key columns in primary table CustomerSubscription of the bean corresponding to the generated class test.subscription.CustomerSubscriptionCMP_1530383317_JDOState must be mapped to key fields.
Map the following primary key columns to key fields: CustomerSubscription.CustomerEmail,CustomerSubscription.SubscriptionType. If you already have fields mapped to these columns, verify that they are key fields.Is it enough that a primary key class be serializable or all fields have to implement Serializable or be a primitive?
Please let me know if you need more information to answer my question.
Thanks.
NikolaHi Nikola,
There are several problems with your CMP bean.
1. Fields of a Primary Key Class must be a subset of CMP fields, so yes, they must be either a primitive or a Serializable type.
2. Sun Application Server does not support Primary Key fields of an arbitrary Serializable type (i.e. those that will be stored
as BLOB in the database), but only primitives, Java wrappers, String, and Date/Time types.
Do you try to use stubs instead of relationships or for some other reason?
If it's the former - look at the CMR fields.
If it's the latter, I suggest to store these fields as regular CMP fields and use some other value as the PK. If you prefer that
the CMP container generates the PK values, use the Unknown
PrimaryKey feature.
Regards,
-marina -
How to use same transaction when calling CMP entity beans and DAO (JDBC)
We are currently using Weblogic 8.1 SP2 with an Oracle 10g database (using XA thin and non-XA drivers).
We have a session bean that invokes an entity bean and a DAO (data access object pattern) in order to add data in 2 separate tables (account and history). Rows are added to the first (account) table using a CMP Entity bean while inserts are done in the 2nd (history) table using a DAO. Here is some pseudo code:
addHistorySessionBean (trans-attribute="Required")
begin
Step #1 - call addAccountEntityBean (trans- attribute="Required")
Step #2 - call addHistoryDAO (get datasource, connection)
end
The 2nd table (history) has a foreign key constraint to ensure that the corresponding key exists in the first (account) table. Unfortunately, DAO inserts on the 2nd (history) table fail with a foreign key constraint violation (INTEGRITY CONSTRAINT VIOLATION - PARENT KEY NOT FOUND!) since they cannot see the row added to the 1st (account) table in step #1 by the CMP entity bean.
How does one ensure that all this is done in a single transaction ? It appears that the app server creates two seperate transactions (one for the session bean facade and the entity bean and a 2nd transaction (when we retrieve a connection using the same data source JNDI name) for the DAO.
A post on server side suggested using a "<resource-ref>" in the session bean to tie the two potentially separate transactions together, but that does not work for us. However, I am not sure if we are doing that correctly. After we define the resource ref in the session facade bean, do we use the resource ref "name" attribute to lookup the datasource or do we still lookup the datasource by JNDI name ? Do we need to define the resource-ref tag in the entity bean also ?
Does Weblogic allow using a single transaction for this type of a scenario ? How does one specify within Weblogic that the same transaction should be utilized by the entity bean and any subsequent DAOs?
People have also suggested that we defer constraint checking until the transaction(s) are committed but that sounds like a work acount without addressing this issue. Would postponing the constraint checking in Oracle cause any additional overhead ?
Any suggestions with specific examples or documentation on how to address this issue will be gratefully appreciated.Thanks for your suggestion. Unfortunately, this does not work since it appears that there are 2 separate transactions going on here. One, the original one initiated by the session bean and used by the entity bean and the other initiated by the DAO. Any other ideas appreciated.
Hi,
Try setting the delay-database-inserts tag to
ejbCreate in RDBMS descriptor file.
http://bernal/stage/wls/docs81/ejb/DDreference-cmp-jar
.html#1113981
vasanthi ramesh -
How to load the existing data from the databse in the CMP entity bean?
hello
my problem is as follows--
i am creating a CMP entity bean.in these beans client create the data instances using create() function.
now a entity bean will be created for the newly created data and it's EJBObject will also be formed.
now we will be able to perform finder methods over them.
remember these data has been newly created in the database.
but now if i want to perform the finder methods on the
existing data in the database( i don't need to use create() fn as i am not "creating" the data.). how will i perform the query over the existing data.
basically i have to make a CMP bean to extract the data corresponding to a particular condition , from the database table. i don't want to create the data in the database but just find out what data satisfies my condition.
thanking you
Prashantyou have to use findByXXX methods. depending on your appserver you may have to declare them (and eventually the query you want to be used) in the vendor specific deploiement descriptor.
(e.g. using jboss i don't remember having explicitly declare the findBySomeField method - where someField is a persistent field - in the dd, whereas with bas all finder methods have to be explicitly declared)
[note that obviously these methods have to be present in your home interface] -
Error while using sybase trigger with the CMP entity bean,ejb version 2.1
Hi All,
I am using ejb version 2.1 and using entity bean (Transaction required) ,i am trying to update data in sybase(ver 12.3) database table
I am using session bean(Transaction required) to update the multiple entity beans in a while loop.It is working fine .But when i am trying to run it with the trigger which updates multiple tables in different sybase databases on update of each entity.Then it throws NoSuchEntityException and it rollback the whole transaction.
My trigger has only few simple update statements and the trigger runs fine without my CMP entity bean.is the CMP does not support the update triggers in sybase or is it the problem with the transaction.
Please help
Thanks
AnshuIf you can have a look at a cmp example in the samples that ship with the server. My guess is that the weblogic-ejb-jar.xml file is missing the <persistence-use> element which for 810 would look like:
<persistence>
<persistence-use>
<type-identifier>WebLogic_CMP_RDBMS</type-identifier>
<type-version>7.0</type-version>
<type-storage>META-INF/weblogic-cmp-rdbms-jar.xml</type-storage>
</persistence-use>
</persistence>
I seem to recall that the elements might be slightly different in structure for the wls700 version of the DTD, so please check that (I cannot, I'm at home and don't have everything here).
Give that a try and see if it doesn't solve your compilation failure.
Also, the compilation should not be throwing a null pointer exception in a case like that, I consider that to be a bug.
-thorick -
Error Deploying CMP Entity Bean
Hi,
I am new to Entity Beans and am trying to deploy a CMP Entity Bean without any success.
I did search this forum for similar issues and tried those suggestions as well but that has not helped. Was wondering if someone could help me out on this.
The Entity bean has 2 fields: name and description.
The ejb-jar.xml file for this bean is:
<enterprise-beans>
<entity>
<ejb-name>Product</ejb-name>
<home>example.cmp.ProductHome</home>
<remote>example.cmp.Product</remote>
<ejb-class>example.cmp.ProductBean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.String</prim-key-class>
<reentrant>false</reentrant>
<cmp-version>2.x</cmp-version>
<abstract-schema-name>PRODUCTS</abstract-schema-name>
<cmp-field>
<field-name>name</field-name>
</cmp-field>
<cmp-field>
<field-name>description</field-name>
</cmp-field>
<primkey-field>name</primkey-field>
<query>
</query>
</entity>
</enterprise-beans>
The error that I get while deploying the bean is:
Error deploying EJB homes for: file:/C:/servers/oc4j1013/j2ee/home/applications/cmptest/cmptest.jar
java.lang.InstantiationException: Error looking up cmt-datasource at jdbc/OracleDS (name not found)
at com.evermind.server.ApplicationState.getDataSourceContainer(ApplicationState.java:384)
Error deploying file:/C:/servers/oc4j1013/j2ee/home/applications/cmptest/cmptest.jar
homes: Error looking up cmt-datasource at jdbc/OracleDS (name not found)
[java] [TopLink Severe]: 2005.04.17 10:22:20.156--ServerSession(28816172)--
Local Exception Stack:
[java] Exception [TOPLINK-7060] (TopLink (Oracle OC4J CMP) - 10g release 3(10.1.3.0) (Build 041129)): oracle.toplink.exceptions.ValidationException
[java] Exception Description: Cannot acquire data source [jdbc/OracleDS].
[java] Internal Exception: javax.naming.NameNotFoundException: jdbc/OracleDS not found
[java] at oracle.toplink.exceptions.ValidationException.cannotAcquireDataSource(ValidationException.java:208)
[java] at oracle.toplink.internal.ejb.cmp.oc4j.Oc4jNonJtaConnector.getOrCreateDataSource(Oc4jNonJtaConnector.java:62)
If anybody knows what the problem is please let me know.
Thanks in advance.
BhupenPlease note that the data-source has been re-architectured in 10.1.3 DP3 and you should have DataSource as follows:
<data-sources xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:noNamespaceSchemaLocation='http://xmlns.oracle.com/oracleas/schema/data-sources-10_1.xsd' schema-major-version='10' schema-minor-version='1'>
<managed-data-source connection-pool-name='Example Connection Pool' jndi-name='jdbc/OracleDS' name='OracleManagedDS' />
<connection-pool name='Example Connection Pool' >
<connection-factory factory-class='oracle.jdbc.pool.OracleDataSource' user='scott' password='tiger' url='jdbc:oracle:thin:@localhost:1521:orcl'>
</connection-factory>
</connection-pool>
</data-sources> -
Composite Primary Key in M:N CMP Entity Bean Relationship
Dear Sir/Madam,
We are creating an Enterprise Application for our institute using EJB 2.0 specifiactions. In the course of developement, we are facing a problem in writing the CMP Entity Beans with EJB Relationships.
We are having many to many relationship between two beans such that the primary key of one Entity Bean (let's call it A), serves as the foreign key of another Entity Bean (let's call it B). Further, this primary key of A as foreign key in B, participates in the composite key of B.
The EJB Specifications require that the primary key field(s) of any bean (B, in our case) declared in the Primary Key class should be the subset of the 'cmp-field' declared in the deployment descriptor for that bean. As I said earlier, we have many to many relationship at play. Hence, we require to keep the foerign key in the 'cmr-field' in lieu of 'cmp-field'. In short, the component of primary key is in 'cmr-field' while, it is needed in both 'cmp-field' and 'cmr-field'. That's perfect from Database point of view but illogical from CMP Entity Bean's view.
How can we write the deployment descriptor for such a CMP (BMP is working fine for above scenario) Entity Bean? Also, how can we write the Primary Key class? The problem is not just to find the solution, but find under the hood of EJB 2.0 specifications.
Please help.I think you should realise that it would not be convenient to use CMP for everything. It is difficult to define complex relations using CMP. Mostly BMP os preferd since it gives the flexibility for the bean developer.
Regards
xH4x0r -
Problems accessing fields in a CMP entity bean from a session bean
Hello everybody,
I'm getting the next problem: when I try to access a field in a CMP entity bean that I have instantiated from a session bean (trhoug entitybean.getNameOfField), I get the error "the entity bean does not exist in the database".
This entity bean is accessing a table in an external database (not the DB of the WAS), but I know that it's getting the correct data from the table, since I check the entitybean.size() and the entitybean.findByPrimaryKey(), and I get the right information. For some reason, the only thing that it doesn't work in the entity bean are the getter/setter methods (I created them automatically after having created the entity fields).
I access the entity bean through its local interface...
I know it's really difficult to give an answer with so few details, but... does anybody think I forgot something important to configure??
Thank very much in advance!!
Isidrogetter and setter methods for cmp-fields are abstract.
getter and setter methods for cmr-fields are abstract.
"John Lee" <[email protected]> wrote:
>
Hi:
Which method in a CMP Entity bean should be abstract? just only SetXXX
and
GetXXX?
Thanks!
John Lee
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