Creating entity beans (EJB3) from xml schema

Dear friends,
I have a XML schema.. and I want to implement an Enterprise application with EJB3 Entity Beans exposed through a set of JAX-WS Web-Services...
question: how to define the entities from the XML schema?

Two alternatives:
1) JAXB 2.0 generates POJOs with JAXB annotations in them. You can take ownership of those POJOs and add Java Persistence API annotations in them by hand. Basically, you will end up having both both JPA and JAXB annotations in the same Java class. You can then use them in your code both with JAXB APIs and JPA APIs.
2) Have a look at http://hyperjaxb3.dev.java.net/ It is trying to automate what I described in #1. The project is still not complete, so right now, you may have to hand code the JPA annotations.
Sahoo

Similar Messages

Unable to create xml from xml schema

JDeveloper 10.1.3 EA1
I am unable to create a new xml file from an xml schema when the starting root element is a complex type (but it works with a simple type). It does not matter if the xml schema is registered within JDeveloper.
Is this a bug or intended behaviour?
Error message:
''XML Document from XML Schema creation could not be competed succesfully. Make sure the source schema is valid and that you have write permissions to the output directory."
NB The xml schema is valid and I have write permissions on the specified directory.

When I do not register this (or other) schema with JDeveloper, I can create an xml document from xml schema. However, when I register this schema and then try to generate an xml document (either from the registered xsd either from a filesystem xsd) with person as starting node it fails with the mentioned error. However, when I use city as starting node it is generated successfully.
<?xml version="1.0" encoding="windows-1252" ?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns="http://www.amis.nl/demo/hrm"
targetNamespace="http://www.amis.nl/demo/hrm"
elementFormDefault="qualified">
<xsd:element name="person">
<xsd:annotation>
<xsd:documentation>
A sample complex element
</xsd:documentation>
</xsd:annotation>
<xsd:complexType>
<xsd:sequence>
<xsd:element name="name" type="xsd:string"/>
<xsd:element name="length" type="xsd:int"/>
<xsd:element name="weight" type="xsd:int" />
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:element name="city" type="xsd:string">
<xsd:annotation>
<xsd:documentation>
A sample simple element.
</xsd:documentation>
</xsd:annotation>
</xsd:element>
</xsd:schema>

Create xml from xml schema in java

If can i create a xml document framework from xml schema in java, then i can fill the value in java?
thanks

An XML document may be created from an XML Schema with JAXB.

How to create an Excel file from XML in the Receiver File Adapter Comm Ch

How do I create an Excel file from XML in the Receiver File Adapter Communication Channel? I have my mapping done and I am outputting the file as a comma delimited csv file. However, the target can only process an Excel file (.xls). How can I generate an Excel in XI?
I saw this blog, but I don't know how to create a XSLT transformation.
/people/michal.krawczyk2/blog/2005/12/10/xi-generating-excel-files-without-the-java-nor-the-conversion-agent-not-possible
Any help would be appreciated. Thanks.

Here are the steps I took to create an XSLT transformation in XI 3.0:
1. I created my source and target XSDs using XMLSpy.
2. I created the XSLT mapping from source to target in XMLSpy (referencing the souce XSD schema).
3. I created another XSLT mapping to format the target into Excel XML.
4. Import the source and target XSDs in the IR's External Definitions
5. Zip each XSLT mapping (.xls) and import it into the IR's Imported Archives
6. Reference the XSL mappings in the Interface Mapping

XML Document from XML Schema Bug

When an XML document is generated from an XML Schema the XML document does not have all the elements specified in the XML Schema. The XML document only has the root element.
1. Register an XML Schema.
2. Create an XML document with File>New>General>XML>XML Document from XML Schema. The "Generate only Required Elements" is unchecked.
3. The XML document has only the root element.
In JDeveloper 10.1.3 all the elements in the XML Schema get generated.

Also, the component palette for the XML document generated from the XML Schema does not list all the elements in the XML Schema, only the root element is listed. Even if elements are specified as required in the XML Schema with minOccurs="1" and the "Generate only Required Elements" checkbox is selected only the root element gets generated.

Java code to generate XML File from XML Schema

Hi I need this asap... "Java code to generate XML File from XML Schema i.e XML Schema Definition, XSD file".
Thankz in advance...

JAXB has been available as an early release download for some time. There are also XML Binding packages available from Borland (JBuilder) and Castor. These tools create Java classes from a source document, xml,dtd etc. You can use these classes to marshal-unmarshal XML documents.
Dave

Creating entity beans with auto numbered primary key

I have two entity bean with a CMR between them. I am successfully creating the first one but when I try and create the child entity bean I get a NullPointerException.
Now I think this is because the gernerated code tries to get the primary key of the created entity bean and this is not set as it is set using a auto number in the database (An oracle sequence and trigger).
Is there anyway i can get round this problem?
Thanks in advance,
Adrian

This is the auto generated code:
     public dmd.sync.ejbs.entity.AppliancePackInfoLocal create_Local(dmd.sync.dataobjects.dto.AppliancePackInfoDTO appliancePackInfoDTO, dmd.sync.ejbs.entity.AmppLocal amppLocal) throws javax.ejb.CreateException, java.rmi.RemoteException {
          BeanO beanO = null;
          dmd.sync.ejbs.entity.AppliancePackInfoLocal result = null;
          boolean createFailed = false;
          boolean preCreateFlag = false;
          try {
               beanO = super.createBeanO();
               dmd.sync.ejbs.entity.AppliancePackInfoBean bean = (dmd.sync.ejbs.entity.AppliancePackInfoBean) beanO.getEnterpriseBean();
               preCreateFlag = super.preEjbCreate(beanO);
               bean.ejbCreate(appliancePackInfoDTO, amppLocal);
               Object ejsKey = keyFromBean(bean);
               result = (dmd.sync.ejbs.entity.AppliancePackInfoLocal) super.postCreate_Local(beanO, ejsKey, true);
               bean.ejbPostCreate(appliancePackInfoDTO, amppLocal);
               super.afterPostCreate(beanO, ejsKey);
It must be falling over on the last line as it calls the ejbPostCreate fine.

Hi I need this asap... "Java code to generate XML File from XML Schema"

Hi all....
I need this asap... "Java code to generate XML File from XML Schema i.e XML Schema Definition, XSD file".
Thankz in advance...
PS: I already posted in the afternoon... this is the second posting.

take look at :
http://sourceforge.net/projects/jaxme/
this might help...

Using "XML Document from XML Schema" in JDeveloper

Hi Experts,
I have a requirement to generate XML Document from XML Schema.
For this I have used "XML Document from XML Schema" feature in JDeveloper. It is found in File->New->General->XML Document form XML Schema.
I have registered a schema with jdev and got an XML document output for that successfully.
Now, I want to implement this feature in my code for generating XML documents when XSD files are provided.
Can any one please provide me with pointers to do that? I am sure there should be some libraries which can implement this feature.
Thanks,
Dilbagh

Create an XML document from a Schema with the Oracle SchemaClassGenerator.
import oracle.xml.classgen.SchemaClassGenerator;
XMLSchema schema=new XMLSchema();
XSDBuilder builder = new XSDBuilder();
URL url = new URL(schemaUrl);
schema = (XMLSchema)builder.build(url);
SchemaClassGenerator generator = new SchemaClassGenerator();
Generate the Java classes from the example XML Schema.
generator.generate(schema);With the java classes construct an XML document.

MDB gets cannot find recently created Entity Bean

I have a session bean that creates several entities beans, and puts a message onto
JMS queue. A MDB is configured to read the queue, and in onMessage(), it calls
findByPrimaryKey() for one of the newly created EntityBeans. However, the entity
bean cannot be found.
All of the beans in question are using container managed transactions, and all
have transaction required. The entity bean that I'm looking for is using optimistic
concurrency. I cannot change it to exclusive without redesigning a major part
of the system, which have solved a similar problem that I encounted earlier that
did not involve any message driven beans.
The only way that I got it to work is put in Thread.sleep(5000) right before calling
the finder. Does anyone know of any alternatives besides having the MDB sleep?

No, this will work fine with the existing server. If the publish is
part of the JTA transaction, then no one can consume the message until
the original JTA transaction has committed.
-- Rob
Rajesh Mirchandani wrote:
XA defines that a transaction's individual operations will either fail or
succeed atomically. XA can not, and does not define that a transaction's
individual operations occur exactly simultaneously.
The WL transaction monitor does not currently provide a way to serialize a
transactions commit operations on its component resource managers.
There is an enhancement filed for this, I guess. Follow up with BEA support.
Rob Woollen wrote:
Vina Wang wrote:
The JMS send is part of the transaction, sort of. The call is within
the session
bean transaction, but I'm not using transacted session for
JMSPulisher. Would
that fix the problem?Sadly this is a confusing aspect of JMS. You want a non-transacted
session because you want it to participate in the global transaction
that the EJB started. Also, make sure that you've enabled user
transactions on your connection factory.
There's more info here:
http://edocs.bea.com/wls/docs70/faq/jms.html#252635
Let us know if you're still having problems.
-- Rob
I know that the transaction hasn't been commited, but I was monitoring
database
via SQL call when I tried this. There was about 2 second delay on my
development
machine.
Rob Woollen wrote:
My guess is the MDB is receiving the message before your "create entity
bean" transaction has committed. Is the JMS send part of the "create
entity bean" transaction? It probably should be.
You can easily prove this by writing a few lines of JDBC to hit the
database and check for your primary key.
I would not recommend changing to exclusive or using the Thread.sleep.
-- Rob
Vina Wang wrote:
I have a session bean that creates several entities beans, and putsa
message onto
JMS queue. A MDB is configured to read the queue, and in onMessage(),
it calls
findByPrimaryKey() for one of the newly created EntityBeans. However,
the entity
bean cannot be found.
All of the beans in question are using container managed transactions,
and all
have transaction required. The entity bean that I'm looking for is
using optimistic
concurrency. I cannot change it to exclusive without redesigning a
major part
of the system, which have solved a similar problem that I encounted
earlier that
did not involve any message driven beans.
The only way that I got it to work is put in Thread.sleep(5000) right
before calling
the finder. Does anyone know of any alternatives besides having the
MDB sleep?
Rajesh Mirchandani
Developer Relations Engineer
BEA Support

Create bean from XML Schema

I am wondering if it is possible to create a bean from an XML Schema that I have defined in JDeveloper. In BEA Weblogic xml beans are automatically generated for you when you create a schema.
What I am trying to do is create a web service that has an input of an xml document based off the schema I have created. But I don't know how to specify that as an input.
Thanks.

Asking a similar question I was guided to TopLink 10.1.3 in this thread:
ADF Faces: Paginated Table backend (EA15)
I looked at XMLBeans but was surprised to find out that it does not generate JavaBean compliant javabeans which caused problems with JSF.
I have been using Castor, http://castor.exolab.org/, I don't know about it integrating with JDeveloper.
TopLink would be the most obvious choice if you need to integrate with JDeveloper. Keep in mind that it is TopLink's XML to JavaBean functionality is new but Oracle has been working with XML for a while. XMLBeans is also a young technology. Castor has been around for many years.
Good Luck,
Rachel

Create table from XML schema

HI,
is there any possibilty to create a relational table from a XML schema?

Can you use a schema when we compose XML doc from Database tables?
Actually, I'm using SQL Server (sorry, wrong forum). But, I thought a Java tool would have a solution for me.

Error when deploying a simple Entity bean (EJB3) on Glassfich or Sun AS

Hi,
After some problems when deploying complex EJB3 Entity bean on GlassFich with a MySQL connector, I have made a simple entity.
(test with Glassfish and Sun AS with same result)
With netbean 5.5 => New EJB Module
File->New->Persistence Unit (and use default values)
Persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence">
<persistence-unit name="test" transaction-type="JTA">
   <provider>oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider</provider>
    <jta-data-source>jdbc/sample</jta-data-source>
    <properties>
      <property name="toplink.ddl-generation" value="create-tables"/>
    </properties>
</persistence-unit>
</persistence>File->New->Entity Class
EntityTest.java
package test;
import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class EntityTest implements Serializable
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    /** Creates a new instance of EntityTest */
    public EntityTest()
    public Long getId()
        return id;
    public void setId(Long id)
        this.id = id;
    public String toString()
        //TODO change toString() implementation to return a better display name
        return "" + this.id;
}Build of project work fine but when I try to deploy (with the 2 servers), I have the error :
Exception occured in J2EEC Phase
com.sun.enterprise.deployment.backend.IASDeploymentException: Deployment Error -- null
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:790)
at java.util.HashMap$KeyIterator.next(HashMap.java:823)
at com.sun.enterprise.deployment.backend.EjbModuleDeployer.generatePolicy(EjbModuleDeployer.java:203)
at com.sun.enterprise.deployment.backend.ModuleDeployer.doRequestFinish(ModuleDeployer.java:171)
at com.sun.enterprise.deployment.phasing.J2EECPhase.runPhase(J2EECPhase.java:169)
at com.sun.enterprise.deployment.phasing.DeploymentPhase.executePhase(DeploymentPhase.java:95)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.executePhases(PEDeploymentService.java:871)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.deploy(PEDeploymentService.java:266)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.deploy(PEDeploymentService.java:739)
at com.sun.enterprise.management.deploy.DeployThread.deploy(DeployThread.java:174)
at com.sun.enterprise.management.deploy.DeployThread.run(DeployThread.java:210)

Yes, the problem is that the ejb-jar must contain at least one ejb component. It's a common misconception that Java Persistence API Entity classes are ejb components but they are NOT. The Java Persistence API was developed within the EJB 3.0 JSR and works very well with EJB but the entity classes themselves are not full-fledged ejb components.
--ken

Error in deploying entity beans - migration from JBoss to Weblogic 10.3.4

Hi,
I am migrating EJB2.x code from JBoss to Weblogic 10.3.4. As a first step, I am tyring to deploy just Entity beans. I get following error when deploying to server.
'weblogic.application.ModuleException: Exception preparing module: EJBModule(myEJB.jar)
Unable to deploy EJB: CollMetaData from myEJB.jar:
[EJB:011017]Error while reading 'META-INF/weblogic-cmp-rdbms-jar.xml'. The error was:
There are 1 nested errors:
java.lang.NullPointerException
     at weblogic.ejb.container.cmp.rdbms.finders.EjbqlFinder.setMethods(EjbqlFinder.java:288)
     at weblogic.ejb.container.cmp.rdbms.Deployer.processFinders(Deployer.java:744)
     at weblogic.ejb.container.cmp.rdbms.Deployer.readTypeSpecificData(Deployer.java:446)
     at weblogic.ejb.container.persistence.PersistenceType.setTypeSpecificFile(PersistenceType.java:506)
     at weblogic.ejb.container.persistence.PersistenceType.setupDeployer(PersistenceType.java:455)
     at weblogic.ejb.container.deployer.CMPInfoImpl.setup(CMPInfoImpl.java:118)
     at weblogic.ejb.container.deployer.EJBDeployer.prepare(EJBDeployer.java:1214)
     at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:442)
     at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:199)
     at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:517)
     at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52)
     at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:159)
     at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:45)
     at weblogic.application.internal.BaseDeployment$1.next(BaseDeployment.java:613)
     at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52)
     at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:184)
     at weblogic.application.internal.EarDeployment.prepare(EarDeployment.java:58)
     at weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:154)
     at weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:60)
     at weblogic.deploy.internal.targetserver.operations.ActivateOperation.createAndPrepareContainer(ActivateOperation.java:207)
     at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doPrepare(ActivateOperation.java:98)
     at weblogic.deploy.internal.targetserver.operations.AbstractOperation.prepare(AbstractOperation.java:217)
     at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentPrepare(DeploymentManager.java:747)
     at weblogic.deploy.internal.targetserver.DeploymentManager.prepareDeploymentList(DeploymentManager.java:1216)
     at weblogic.deploy.internal.targetserver.DeploymentManager.handlePrepare(DeploymentManager.java:250)
     at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.prepare(DeploymentServiceDispatcher.java:159)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doPrepareCallback(DeploymentReceiverCallbackDeliverer.java:171)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$000(DeploymentReceiverCallbackDeliverer.java:13)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$1.run(DeploymentReceiverCallbackDeliverer.java:46)
     at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:528)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:207)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:176)
Can someone help me fixing the issue?
I changed schema locations of descriptor files as suggested at http://download.oracle.com/docs/cd/E17904_01/web.1111/e13706/overview.htm#i1074199 (see the third category for '*Enterprise Bean 2.1*' in the listing Table 1-1). Alternatively, you may see the schema locations for EJB2.0 directly at http://download.oracle.com/docs/cd/E17904_01/web.1111/e13719/dd_reference.htm#EJBPG481

JRE version in JBoss is 1.6.0_16. JVM in web logic is pointing to jrockit_160_22_D1.1.1-3 which is come in the package. It doesn't seem to be related to JVM version mismatch.
I think it is an issue with definitions in weblogic-cmp-rdbms-jar.xml file. How should be the definition of entity-descriptor appear for entity bean which has finder methods in ejb-jar.xml?
Please see the snippets from corresponding descriptor files below.
ejb-jar.xml
=========
<entity>
<display-name>EmpBean</display-name>
<ejb-name>EmpBean</ejb-name>
<local-home>LocalEmpBeanHome</local-home>
<local>LocalEmpBean</local>
<ejb-class>EmpBeanBean</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>EmpBean</abstract-schema-name>
<cmp-field>
<field-name>firstName</field-name>
</cmp-field>
<cmp-field>
<field-name>lastName</field-name>
</cmp-field>
<cmp-field>
<field-name>phone</field-name>
</cmp-field>
<cmp-field>
<field-name>address</field-name>
</cmp-field>
<primkey-field>lastName</primkey-field>
<query>
<query-method>
          <method-name>findByPrimaryKey</method-name>
               <method-params>
               <method-param>java.lang.String</method-param>
               </method-params>
          </query-method>
          <ejb-ql>SELECT Object(o) FROM EmpBean o WHERE o.lastName= ?1</ejb-ql>
     </query>
</entity>
weblogic-jar.xml
============
<weblogic-enterprise-bean>
<ejb-name>EmpBean</ejb-name>
<entity-descriptor>
     <pool>
          <max-beans-in-free-pool>20</max-beans-in-free-pool>
          <initial-beans-in-free-pool>5</initial-beans-in-free-pool>
     </pool>
<persistence>
<persistence-use>
<type-identifier>WebLogic_CMP_RDBMS</type-identifier>
<type-version>6.0</type-version>
<type-storage>meta-inf/weblogic-cmp-rdbms-jar.xml</type-storage>
</persistence-use>
<finders-load-bean>true</finders-load-bean>
</persistence>
</entity-descriptor>
<local-jndi-name>ejb/EmpBean</local-jndi-name>
</weblogic-enterprise-bean>
weblogic-cmp-rdbms-jar.xml
====================
<weblogic-rdbms-bean>
<ejb-name>EmpBean</ejb-name>
<data-source-jndi-name>mysqlDS</data-source-jndi-name>
<table-map>
<table-name>emp</table-name>
<field-map>
<cmp-field>firstName</cmp-field>
<dbms-column>first_namel</dbms-column>
</field-map>
<field-map>
<cmp-field>lastName</cmp-field>
<dbms-column>last_name</dbms-column>
</field-map>
<field-map>
<cmp-field>phone</cmp-field>
<dbms-column>phone</dbms-column>
</field-map>
<field-map>
<cmp-field>address</cmp-field>
<dbms-column>address</dbms-column>
</field-map>
</table-map>
<weblogic-rdbms-bean>
Please ignore any typos that you may notice in above sample descriptions (because I just typed it here changing original names).
When I try to deploy the application, I get error message as posted in my first post above in this thread. Please correct me if I am making any erros in descriptor files.
Edited by: 839281 on Feb 25, 2011 10:55 AM
Edited by: venkatp on Mar 1, 2011 9:31 AM

Mapping Entity Beans to physical DB schemas

Does any one have any idea whether sun application server(PE) supports mapping an entity bean to a table in a schema in a database, when using CMP
eg
something like insert into schema_name.table_name

Thanks ian, what you say is completely true. However if you have a database with multiple schemas and then you use the capture-schema utility to obtain a perticular schema(For example say abc). Then you deploy the entity beans on the application server. The entity beans use a connection pool which logs in as 'system' to the database.
In this case since i use a captured schema the application server does not create the tables.Since the application server does not reffer to scehma 'abc' on it's insert statement the sql fails (we are logged in as system, so the default schema is system). It is possible to create and use a user 'abc' for schema 'abc', bu this means creating seperate database users for each schema and creating sepperate connection pools for each schema.
Is there any way we can indicate to the application server during deployement to use a specific table from a specific schema(Physical DB schema). I can specify to use a table from captured schema, but in order for this to work the application server needs to be logged on to the database as that schema's defualt user.
-Kusan Atukorala

Creating entity beans (EJB3) from xml schema

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