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Entity Bean on JBoss4.0.2

adrian mills
Ranch Hand

Joined: Dec 09, 2004
Posts: 63
Hi All,
I am using JBoss 4.0.2 and MySQL 4.1.13.
I have deployed my entity bean successfully and the tables are created on the backened.
But when I try to insert data I am getting the following exception.


14:33:43,953 ERROR [LogInterceptor] TransactionRolledbackException in method: public abstract com.cygnet.medina.Hospital.Hospital com.cygnet.medina.Hospital.HospitalHome.create(com.cygnet.medina.Hospital.HospitalData) throws javax.ejb.CreateException,java.rmi.RemoteException, causedBy:
javax.ejb.EJBException: getGeneratedKeys returned an empty ResultSet
at org.jboss.ejb.plugins.cmp.jdbc.keygen.JDBCMySQLCreateCommand.executeInsert(JDBCMySQLCreateCommand.java:87)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCAbstractCreateCommand.performInsert(JDBCAbstractCreateCommand.java:308)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCAbstractCreateCommand.execute(JDBCAbstractCreateCommand.java:138)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.createEntity(JDBCStoreManager.java:572)
at org.jboss.ejb.plugins.CMPPersistenceManager.createEntity(CMPPersistenceManager.java:222)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.createEntity(CachedConnectionInterceptor.java:266)
at org.jboss.ejb.EntityContainer.createHome(EntityContainer.java:766)
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:324)
at org.jboss.invocation.Invocation.performCall(Invocation.java:345)
at org.jboss.ejb.EntityContainer$ContainerInterceptor.invokeHome(EntityContainer.java:1113)


A null is inserted in the primarykey field.

Here is my Entity Bean code.

public abstract class HospitalEJB implements EntityBean {

private EntityContext context;
public Long hospitalid;
public String hospitalname;

public void ejbLoad() throws EJBException, RemoteException {

}
public void ejbActivate() throws EJBException, RemoteException {

}

public Long ejbCreate(HospitalData hospitalData) throws CreateException{
Long myid = new Long(UniqueIdGenerator.getId());
System.out.println("My id generated ====== "+myid);
this.hospitalid = myid;
System.out.println("My id generated ====== "+this.hospitalid);
System.out.println("Came in ejbCreate method of HospitalEJB");

this.hospitalname = hospitalData.getHospitalname();
return null;

}

public void ejbPostCreate(HospitalData hospitalData)throws CreateException,RemoteException{
System.out.println("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$");
System.out.println("Came in EJB POSTCreate of HospitalEJB");
System.out.println("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$");

}

public void ejbRemove()
throws RemoveException, RemoteException, EJBException {

}

public void setEntityContext(EntityContext context)
throws EJBException, RemoteException {

}

public void unsetEntityContext() throws EJBException, RemoteException {


}

public void ejbPassivate() throws EJBException, RemoteException {

}

public void ejbStore() throws EJBException, RemoteException {

}





/**
* @return
*/
public abstract Long getHospitalid();

/**
* @return
*/
public abstract String getHospitalname();

/**
* @param long1
*/
public abstract void setHospitalid(Long long1);

/**
* @param string
*/
public abstract void setHospitalname(String string);


public HospitalData getHospitalData(){
System.out.println("Came in get hospital data");
System.out.println("In Get method of HospitalEJB"+this.hospitalid);
System.out.println("In Get method of HospitalEJB"+this.hospitalname);

HospitalData hospitalData = new HospitalData();
hospitalData.setHospitalid(this.hospitalid);
hospitalData.setHospitalname(this.hospitalname);
System.out.println("In Get method of HospitalEJB"+hospitalData.getHospitalid());
System.out.println("In Get method of HospitalEJB"+hospitalData.getHospitalname());
return hospitalData;
}


public void setHospitalData(HospitalData hospitalData){
System.out.println("In Set method of HospitalEJB" + hospitalData.getHospitalname());
this.hospitalname = hospitalData.getHospitalname();
}

}


Here is my <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>
<enterprise-beans>
<session>
<ejb-name>UserManager</ejb-name>
<home>com.cygnet.medina.UserManager.UserManagerHome</home>
<remote>com.cygnet.medina.UserManager.UserManager</remote>
<ejb-class>com.cygnet.medina.UserManager.UserManagerEJB</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</session>

<assembly-descriptor>
<container-transaction>
<method>
<ejb-name>UserManager</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
</assembly-descriptor>


<session>
<ejb-name>HospitalManager</ejb-name>
<home>com.cygnet.medina.HospitalManager.HospitalManagerHome</home>
<remote>com.cygnet.medina.HospitalManager.HospitalManager</remote>
<ejb-class>com.cygnet.medina.HospitalManager.HospitalManagerEJB</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</session>

<assembly-descriptor>
<container-transaction>
<method>
<ejb-name>HospitalManager</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
</assembly-descriptor>

<entity>
<ejb-name>AnesthesiaUser</ejb-name>
<home>com.cygnet.medina.user.AnesthesiaUserHome</home>
<remote>com.cygnet.medina.user.AnesthesiaUser</remote>
<ejb-class>com.cygnet.medina.user.AnesthesiaUserEJB</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.Long</prim-key-class>
<reentrant>False</reentrant>
<cmp-version>2.x</cmp-version>
<abstract-schema-name>AnesthesiaUser</abstract-schema-name>
<cmp-field>
<field-name>userid</field-name>
<column-name>userid</column-name>
</cmp-field>
<cmp-field>
<field-name>username</field-name>
<column-name>username</column-name>
</cmp-field>
<cmp-field>
<field-name>password</field-name>
<column-name>password</column-name>
</cmp-field>
<cmp-field>
<field-name>usertype</field-name>
<column-name>usertype</column-name>
</cmp-field>
<cmp-field>
<field-name>createddate</field-name>
<column-name>createddate</column-name>
</cmp-field>
<cmp-field>
<field-name>updateddate</field-name>
<column-name>updateddate</column-name>
</cmp-field>
<primkey-field>userid</primkey-field>
<query>
<query-method>
<method-name>findByUsername</method-name>
<method-params>
<method-param>java.lang.String</method-param>
</method-params>
</query-method>
<ejb-ql></ejb-ql>
</query>

</entity>
<assembly-descriptor>
<container-transaction>
<method>
<ejb-name>AnesthesiaUser</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
</assembly-descriptor>
<!-- Added -->

<entity>
<ejb-name>Hospital</ejb-name>
<home>com.cygnet.medina.Hospital.HospitalHome</home>
<remote>com.cygnet.medina.Hospital.Hospital</remote>
<ejb-class>com.cygnet.medina.Hospital.HospitalEJB</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.Long</prim-key-class>
<reentrant>False</reentrant>
<cmp-version>2.x</cmp-version>
<abstract-schema-name>Hospital</abstract-schema-name>
<cmp-field>
<field-name>hospitalid</field-name>
<column-name>hospitalid</column-name>
</cmp-field>
<cmp-field>
<field-name>hospitalname</field-name>
<column-name>hospitalname</column-name>
</cmp-field>
<primkey-field>hospitalid</primkey-field>
</entity>
<assembly-descriptor>
<container-transaction>
<method>
<ejb-name>Hospital</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
</assembly-descriptor>
<!-- End -->

</enterprise-beans>
</ejb-jar>


Here is my jbosscmp-jdbc.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jbosscmp-jdbc PUBLIC
"-//JBoss//DTD JBOSSCMP-JDBC 4.0//EN"
"http://www.jboss.org/j2ee/dtd/jbosscmp-jdbc_4_0.dtd">

<!-- ===================================================================== -->
<!-- -->
<!-- Standard JBossCMP-JDBC Configuration -->
<!-- -->
<!-- ===================================================================== -->

<!-- $Id: standardjbosscmp-jdbc.xml,v 1.84.2.6 2005/01/26 18:51:35 starksm Exp $ -->

<jbosscmp-jdbc>

<defaults>
<datasource>java:/MySqlDS</datasource>
<!-- <datasource-mapping>MySQL</datasource-mapping> -->
<create-table>true</create-table>
<remove-table>true</remove-table>
<read-only>false</read-only>
<read-time-out>300000</read-time-out>
<row-locking>false</row-locking>
<pk-constraint>true</pk-constraint>
<fk-constraint>false</fk-constraint>
</defaults>

<enterprise-beans>
<entity>
<ejb-name>AnesthesiaUser</ejb-name>
<pk-constraint>false</pk-constraint>
<table-name>AnesthesiaUser</table-name>
<cmp-field>
<field-name>userid</field-name>
<column-name>userid</column-name>
<jdbc-type>BIGINT</jdbc-type>
<sql-type>BIGINT</sql-type>
</cmp-field>
<cmp-field>
<field-name>username</field-name>
<column-name>username</column-name>
<jdbc-type>VARCHAR</jdbc-type>
<sql-type>VARCHAR(50)</sql-type>
</cmp-field>
<cmp-field>
<field-name>password</field-name>
<column-name>password</column-name>
<jdbc-type>VARCHAR</jdbc-type>
<sql-type>VARCHAR(50)</sql-type>
</cmp-field>
<cmp-field>
<field-name>usertype</field-name>
<column-name>usertype</column-name>
<jdbc-type>VARCHAR</jdbc-type>
<sql-type>VARCHAR(50)</sql-type>
</cmp-field>
<cmp-field>
<field-name>createddate</field-name>
<column-name>createddate</column-name>
<jdbc-type>TIMESTAMP</jdbc-type>
<sql-type>DATETIME</sql-type>
</cmp-field>
<cmp-field>
<field-name>updateddate</field-name>
<column-name>updateddate</column-name>
<jdbc-type>TIMESTAMP</jdbc-type>
<sql-type>DATETIME</sql-type>
</cmp-field>
<query>
<query-method>
<method-name>findByUsername</method-name>
<method-params>
<method-param>java.lang.String</method-param>
</method-params>
</query-method>
<jboss-ql><![CDATA[
SELECT OBJECT(u)
FROM AnesthesiaUser u
WHERE u.username = ?1 ]]></jboss-ql>
</query>
<entity-command name="mysql-get-generated-keys"/>



</entity>

<!-- Added -->
<entity>
<ejb-name>Hospital</ejb-name>
<pk-constraint>false</pk-constraint>
<table-name>Hospital</table-name>
<cmp-field>
<field-name>hospitalid</field-name>
<column-name>hospitalid</column-name>
<jdbc-type>BIGINT</jdbc-type>
<sql-type>BIGINT</sql-type>
</cmp-field>
<cmp-field>
<field-name>hospitalname</field-name>
<column-name>hospitalname</column-name>
<jdbc-type>VARCHAR</jdbc-type>
<sql-type>VARCHAR(50)</sql-type>
</cmp-field>
<entity-command name="mysql-get-generated-keys"/>

</entity>

<!-- End -->
</enterprise-beans>

</jbosscmp-jdbc>


Can anyone point out where is the mistake.??
Please I have been stuck on this for 2 days now.
Thanks a lot for all your help.
Regards
Adrian
Dave Salter
Ranch Hand

Joined: Jul 20, 2005
Posts: 293

Is your id field in MySQL set as an auto increment?

Dave.
adrian mills
Ranch Hand

Joined: Dec 09, 2004
Posts: 63
No the id is generated by me in the ejbCreate method using another class

UniqueId generator

Here is the class
package com.cygnet.medina.util;

/**
* @author shardul
*
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
public class UniqueIdGenerator {



private static long id = System.currentTimeMillis();

public static synchronized long getId() {
System.out.println(" $$**Came in UniqueId Generator **$$");
System.out.println("Value of id returned is **$$ ====="+ id);
return id++;

}

}

Thanks dave for the reply I hope this is sufficient for you to give me further hint.

Cheers
Adrian
 
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