[JBoss-user] [EJB 3.0] - A exception with : org.hibernate.MappingException: Named que
A exception with : org.hibernate.MappingException: Named query not known.
When my Servlet invoke like this:
try {
| InitialContext ctx = new InitialContext();
| log.info("InitialContext ctx = new InitialContext();");
| userFacad
| log.info("userFacade =e = (UserFacadeService)
ctx.lookup("UserFacade/local"); (UserFacadeService)
ctx.lookup(\"UserFacade/local\");");
| } catch (Exception e) {
| e.printStackTrace();
| log.info(e);
| }
| userFacade.regUser(new User(userName, password));
Jboss Server throw exception like that:
exception
|
| javax.ejb.EJBTransactionRolledbackException:
javax.persistence.PersistenceException: org.hibernate.MappingException: Named
query not known: findUserByName
| org.jboss.ejb3.tx.Ejb3TxPolicy.handleInCallerTx(Ejb3TxPolicy.java:89)
| org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:130)
|
org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:196)
|
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
|
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
|
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
|
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:54)
|
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
|
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78)
|
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
|
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
|
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
|
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
|
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
|
org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:181)
|
org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:79)
| $Proxy86.findByName(Unknown Source)
| richie.gt.ejb3.facade.UserFacade.regUser(UserFacade.java:37)
I don't know why it happened.Help~~This is UserFacade Class.
public User regUser(User user) {
| /**
| * save a new User
| */
| if (um.findByName(user.getUserName()) != null)
| return null;
| um.save(user);
| return um.findByName(user.getUserName());
| //um is a instance of UserManager class
| }
This is UserManager Class:
@NamedQueries( {
| @NamedQuery(name = "findUserByName", query = "SELECT u FROM
User u WHERE u.userName = : userName")})
| @Stateless
| @Local( { richie.gt.ejb3.service.UserManagerService.class })
| public class UserManager implements UserManagerService {
|
| @PersistenceContext
| protected EntityManager em;
|
| /**
| * findByName (Func)
| */
| public User findByName(String userName) {
| return (User)
em.createNamedQuery("findUserByName").setParameter(
| "userName", userName).getSingleResult();
|
| }
|
This is persistence.xml
|
|
| java:MySqlDS
| richie.gt.ejb3.manager.UserManager
|
|
| true
| thread
| 1
|
|
|
|
Thank you~ your attention
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[JBoss-user] [EJB 3.0] - Re: Without rhyme or reason? a ClassCastException occured!
I changed the servlet :
| private void showUser(HttpServletRequest request,
| HttpServletResponse response) {
| try {
| InitialContext ctx = new InitialContext();
| userSession = (userSession)
ctx.lookup("userSessionBean/local");
| } catch (Exception e) {
| e.printStackTrace();
| }
|
| Collection auser = userSession.getUsers();
| System.out.println(auser);
|
| if (auser != null)
| for (User user : auser) {
| System.out.println("User name : " +
user.getName());
| System.out.println("User id : " + user.getId());
| System.out.println("User mgs : " +
user.getMessage());
| }
| }
|
Error msg:
| 07:09:51,546 INFO [STDOUT] [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL
PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL
PROTECTED], [EMAIL PROTECTED]
| 07:09:51,546 ERROR [[ejb_servlet]] Servlet.service() for servlet
ejb_servlet threw exception
| java.lang.ClassCastException: ejb.persistence.User
| at servlet.ejb_servlet.showUser(ejb_servlet.java:53)
| at servlet.ejb_servlet.doGet(ejb_servlet.java:89)
| at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
|
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[JBoss-user] [EJB 3.0] - Re: Without rhyme or reason? a ClassCastException occured!
"richie-lea" wrote : There is a java.lang.ClassCastException:
ejb.persistence.User.
|
| My servlet code is:
| private void showUser(HttpServletRequest request,
| | HttpServletResponse response) {
| | try {
| | InitialContext ctx = new InitialContext();
| | userSession = (userSession)
ctx.lookup("userSessionBean/local");
| | } catch (Exception e) {
| | e.printStackTrace();
| | }
| |
| | Collection auser = userSession.getUsers();
| | if (auser != null)
| | for (User user : auser) {
| | System.out.println("User name : " +
user.getName());
| | System.out.println("User id : " +
user.getId());
| | System.out.println("User mgs : " +
user.getMessage());
| | }
| | }
| userSessionBean/local getUsers method code is:
|
| | public Collection getUsers() {
| | // TODO Auto-generated method stub
| | return em.createQuery("from User u").getResultList();
| | }
|
| My ejb.persistence.User class is:
|
| | package ejb.persistence;
| |
| | import javax.persistence.*;
| |
| | @Entity
| | @Table(name = "user")
| | public class User {
| | private String name;
| |
| | private int id;
| |
| | private String message;
| |
| | public User() { }
| |
| | public User(String name, String message) {
| | this.name = name;
| | this.message = message;
| | }
| |
| | @Id
| | @GeneratedValue
| | public int getId() {
| | return id;
| | }
| |
| | public void setId(int id) {
| | this.id = id;
| | }
| |
| | public String getMessage() {
| | return message;
| | }
| |
| | public void setMessage(String message) {
| | this.message = message;
| | }
| |
| | public String getName() {
| | return name;
| | }
| |
| | public void setName(String name) {
| | this.name = name;
| | }
| | }
|
| Log msg:
|
| | 06:43:44,937 ERROR [[ejb_servlet]] Servlet.service() for servlet
ejb_servlet threw exception
| | java.lang.ClassCastException: ejb.persistence.User
| | at servlet.ejb_servlet.showUser(ejb_servlet.java:51)
| | at servlet.ejb_servlet.doGet(ejb_servlet.java:87)
| | at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
| | .
| |
| Sorry for the long post, hope you're still with me. My questions is:
| Why did the ClassCastException occured? What's wrong?
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[JBoss-user] [EJB 3.0] - Without rhyme or reason? a ClassCastException occured!
There is a java.lang.ClassCastException: ejb.persistence.User.
My servlet code is:
private void showUser(HttpServletRequest request,
| HttpServletResponse response) {
| try {
| InitialContext ctx = new InitialContext();
| userSession = (userSession)
ctx.lookup("userSessionBean/local");
| } catch (Exception e) {
| e.printStackTrace();
| }
|
| Collection auser = userSession.getUsers();
| if (auser != null)
| for (User user : auser) {
| System.out.println("User name : " +
user.getName());
| System.out.println("User id : " + user.getId());
| System.out.println("User mgs : " +
user.getMessage());
| }
| }
userSessionBean/local getUsers method code is:
| public Collection getUsers() {
| // TODO Auto-generated method stub
| return em.createQuery("from User u").getResultList();
| }
My ejb.persistence.User class is:
| package ejb.persistence;
|
| import javax.persistence.*;
|
| @Entity
| @Table(name = "user")
| public class User {
| private String name;
|
| private int id;
|
| private String message;
|
| public User() { }
|
| public User(String name, String message) {
| this.name = name;
| this.message = message;
| }
|
| @Id
| @GeneratedValue
| public int getId() {
| return id;
| }
|
| public void setId(int id) {
| this.id = id;
| }
|
| public String getMessage() {
| return message;
| }
|
| public void setMessage(String message) {
| this.message = message;
| }
|
| public String getName() {
| return name;
| }
|
| public void setName(String name) {
| this.name = name;
| }
| }
Sorry for the long post, hope you're still with me. My questions is:
Why is there a ClassCastException occured? What's wrong?
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[JBoss-user] [EJB 3.0] - Re: where is my data?
Thx , I got it. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3932759#3932759 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3932759 --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [EJB 3.0] - Re: How to persist forever?
THX,I got it! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3932758#3932758 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3932758 --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [EJB 3.0] - How to persist forever?
EJB 3.0 TrailBlazer: ---Configure Persistence Context "In addition, JBoss AS should create database tables for those entity beans when the application is deployed, and delete those tables when the application is un-deployed. Note that the application is deployed and un-deployed automatically at the server startup or shutdown." It means that if I shutdown or restart the JBoss AS,all the data I stored will be lost? illustration: When the AS was terminated,how to make my app's data come back after the AS restart well. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3932722#3932722 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3932722 --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [EJB 3.0] - Re: where is my data?
It's a EntityBean lifecycle problem?? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3932718#3932718 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3932718 --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [EJB 3.0] - where is my data?
There is a Puzzled question.
I written a class User like this:
@Entity
@Table(name = "user")
public class User {
private String name;
private int id;
private String message;
public User() { }
public User(String name, String message) {
this.name = name;
this.message = message;
}
@Id
@GeneratedValue
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
and I written a Manager class like this:
@PersistenceContext
EntityManager em;
..
User user = new User(name, message);
em.persist(user);
.
When the JBoss Server is running,everything is OK.
the application create a new table named "user",and add data into the table.But
after I close Server, I found everything is lost."user" table cannot
de find,and data is yet!!!
what happend?
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