Johannes Koch

I need to write an EntityBean that holds a collection of EntityBeans of another type plus two single references to EntityBeans of that type. A simple example would be a customer who has a work address and a home address, and a collection of previously used addresses that also need to be stored.

The classes could look like this:
@Entity public class Customer implements Serializable { private Integer id; ... private Address homeAddress; private Address workAddress; private Address[] previousAddresses; ... @CollectionOfElements @IndexColumn(name="index1") public Address[] getPreviousAddresses() { return previousAddresses(); } @OneToOne public Address getHomeAddress() { return homeAddress; } @OneToOne public Address getWorkAddress() { return workAddress; } ... } @Entity public class Address implements Serializable { private Integer id; ... }
However, I could not find any combination of annotations that would persist this setup in a sensible way. All the Addresses always get stored in one table, and I can't find a way to distinguish which address plays which "role" in the customer class when trying to write an SQL query to read them. I would especially like to avoid having to declare a Customer attribute in the Address class, since this would be redundant on the object level and would produce a lot of implementation overhead in my application.
Does anybody know how this can be done? I'm sure I am not the first person running into this need, but unfortunately, all the books, docs and tutorials I found don't cover it.

Found the answer here:
http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4155809#4155809
Thanks for reading.

I am trying to execute two JPQL queries in an EJB3 application deployed on a JBoss 4.2.2.GA. The code looks as follows:
String queryString1 = "select sub from Subscription sub where sub.itemPattern in (select ip from ItemPattern ip where ip.caption = :c)"; List<?> queryResultList = em.createQuery(queryString1).setParameter("c", "myCaption").getResultList(); String queryString2 = "select itm from green20.demo.items.Item itm where itm.persistenceID = :p "; List<?> queryResultList2 = em.createQuery(queryString2).setParameter("p", 2).getResultList();
While the first query works fine, the second one results in the following error:
org.hibernate.QueryParameterException: could not locate named parameter [p]
Even more strange: When I try to switch to a numbered parameter, like this
String queryString2 = "select itm from green20.demo.items.Item itm where itm.persistenceID =?1"; List<?> queryResultList2 = em.createQuery(queryString2).setParameter(1, 2).getResultList();
the error message stays the same and still complains about a named parameter:
org.hibernate.QueryParameterException: could not locate named parameter [1]
This is also not affected by whether I pass the parameter value as int (2), String ("2") or Integer (new Integer(2)).
The only difference I can notice between the two queries is that in the second one I'm using a fully qualified name for the persisted Entity because the class is defined in a different package. Maybe Hibernate gets confused by that?

Can anybody give me a hint? I'm totally out of ideas.
[ June 03, 2008: Message edited by: Johannes Koch ]

I solved my exception by using JAX-WS instead of JAX-RPC.

Reddy,
did you ever find a solution for this?
Thanks, Johannes

James,
which JAR mismatches did you have exactly? I keep getting the same exception, and so do many other people. All kinds of forums are crowded with people asking because of "org.jboss.ws.WSException: Cannot obtain java type mapping for..." errors, but I can't find a final solution for this issue anywhere.
Please, let us know how you resolved this!
Thanks, Johannes

I'm trying to write my first own webservice using EJBs (V3) in a JBoss as server. Building and deploying the webservice bean works fine, but when I try to access a web method with no parameters and no return type like this:
package test.de.laliluna.library; import java.net.URL; import javax.xml.namespace.QName; import javax.xml.rpc.Service; import javax.xml.rpc.ServiceFactory; import de.laliluna.library.BookTestBean; public class WebServiceTestClient { public static void main(String[] args) throws Exception { URL url = new URL("http://localhost:8080/FirstEjb3Tutorial/BookTestBean?wsdl"); QName qname = new QName("http://library.laliluna.de/", "BookTestBeanService"); ServiceFactory factory = ServiceFactory.newInstance(); Service service = factory.createService(url, qname); BookTestBean serviceEndpoint = (BookTestBean)service.getPort(BookTestBean.class); serviceEndpoint.test(); } }
it throws this exception:
Exception in thread "main" org.jboss.ws.WSException: Cannot obtain java type mapping for: {http://library.laliluna.de/}test at org.jboss.ws.metadata.builder.jaxrpc.JAXRPCMetaDataBuilder.processDocElement(JAXRPCMetaDataBuilder.java:627) ... at test.de.laliluna.library.WebServiceTestClient.main(WebServiceTestClient.java:18)
where the last line refers to "Service service = factory.createService(url, qname);"

My questions are:
1. I thought using JAX-WS and Annotations would take care of all the webservice-configuration-XML-SOAP stuff for me. Do I still need to manually specify a type mapping? How? Where?
2. The web method I try to access has neither parameters nor a return value. How can there be any types to map??

If you could make me friends with webservices again, they and I would really appreciate it.


From here: Server code.
package de.laliluna.library; import java.rmi.Remote; import java.util.Iterator; import java.util.List; import javax.ejb.Stateless; import javax.jws.Oneway; import javax.jws.WebMethod; import javax.jws.WebService; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; @Stateless @WebService public class BookTestBean implements BookTestBeanLocal, BookTestBeanRemote, Remote { @PersistenceContext EntityManager em; public static final String RemoteJNDIName = BookTestBean.class.getSimpleName() + "/remote"; public static final String LocalJNDIName = BookTestBean.class.getSimpleName() + "/local"; @WebMethod @Oneway public void test() { Book book = new Book(null, "My first bean book", "Sebastian"); em.persist(book); Book book2 = new Book(null, "another book", "Paul"); em.persist(book2); Book book3 = new Book(null, "EJB 3 developer guide, comes soon", "Sebastian"); em.persist(book3); System.out.println("list some books"); List someBooks = em.createQuery("from Book b where b.author=:name").setParameter("name", "Sebastian") .getResultList(); for(Iterator iter = someBooks.iterator(); iter.hasNext() :wink: { Book element = (Book)iter.next(); System.out.println(element); } System.out.println("List all books"); List allBooks = em.createQuery("from Book").getResultList(); for(Iterator iter = allBooks.iterator(); iter.hasNext() :wink: { Book element = (Book)iter.next(); System.out.println(element); } System.out.println("delete a book"); em.remove(book2); System.out.println("List all books"); allBooks = em.createQuery("from Book").getResultList(); for(Iterator iter = allBooks.iterator(); iter.hasNext() :wink: { Book element = (Book)iter.next(); System.out.println(element); } } }

[ February 20, 2008: Message edited by: Johannes Koch ]
[ February 20, 2008: Message edited by: Johannes Koch ]

...where
at test.de.laliluna.library.WebServiceTestClient.main(WebServiceTestClient.java:22)
refers to
Service service = factory.createService(url, qname);

What's this type mapping about after all? I'm trying to write my first own webservice and did two tutorials, leading to this client code:
package test.de.laliluna.library; import java.net.URL; import javax.xml.namespace.QName; import javax.xml.rpc.Service; import javax.xml.rpc.ServiceFactory; import de.laliluna.library.BookTestBean; public class WebServiceTestClient { /** * @param args */ public static void main(String[] args) throws Exception { URL url = new URL("http://localhost:8080/FirstEjb3Tutorial/BookTestBean?wsdl"); QName qname = new QName("http://library.laliluna.de/", "BookTestBeanService"); ServiceFactory factory = ServiceFactory.newInstance(); Service service = factory.createService(url, qname); BookTestBean serviceEndpoint = (BookTestBean)service.getPort(BookTestBean.class); serviceEndpoint.test();

leading to this exception:
Exception in thread "main" org.jboss.ws.WSException: Cannot obtain java type mapping for: {http://library.laliluna.de/}test at org.jboss.ws.metadata.builder.jaxrpc.JAXRPCMetaDataBuilder.processDocElement(JAXRPCMetaDataBuilder.java:627) ... at test.de.laliluna.library.WebServiceTestClient.main(WebServiceTestClient.java:22)

I expected not to have to care about XML internals of the web service when using Java Annotations - like this:
@WebMethod @Oneway public void test() {...

So, if you could answer these questions:
1. Where/how can I manually specify a type mapping? Or do I need to extend my Annotations?
2. My web method has neither parameters nor a return value, how can there be any types to map??

I'd really appreciate it.

Also, does anybody know a good webservices tutorial for complete webservice rookies using JBoss?

Thanks in advance!