7:19 a.m.
Hello,
Working on JBoss IDE 2.0.0 BETA2 with jBPM 3.1.3, I was trying to store some data to my
own table, instead of jbpm_variableinstance. The JUnit test ran perfectly, but an
"org.hibernate.MappingException: Unknown entity" exception occurred while
running on Tomcat 5.5 after deployment.
Here goes the details:
1. the table creation script:
| create table student (
| id varchar(100) not null default '',
| name varchar(20) default '',
| age int(11) default 0,
| primary key (id)
| );
|
2. the corresponding Student classes (generated by hibernate synchronizer):
| package dgbdatamodel;
| ...
| // primary key
| private java.lang.String id;
|
| // fields
| private java.lang.String name;
| private java.lang.Integer age;
| ...
| // getters and setters
|
3. the mapping file (also generated by hibernate synchronizer):
| <?xml version="1.0"?>
| <!DOCTYPE hibernate-mapping PUBLIC
| "-//Hibernate/Hibernate Mapping DTD//EN"
| "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
|
| <hibernate-mapping package="dgbdatamodel">
| <class
| name="Student"
| table="student"
| >
| <meta attribute="sync-DAO">false</meta>
| <id
| name="Id"
| type="string"
| column="id"
| >
| <generator class="uuid.hex"/>
| </id>
|
| <property
| name="Name"
| column="name"
| type="string"
| not-null="false"
| length="20"
| />
| <property
| name="Age"
| column="age"
| type="integer"
| not-null="false"
| length="11"
| />
| </class>
| </hibernate-mapping>
|
I used the auto-generated simple process, and added the following code to the
MessageActionHandler.execute function:
| stu = new Student();
| stu.setName("the hell");
| JbpmConfiguration cfg = JbpmConfiguration.getInstance();
| JbpmContext jbpmContext = cfg.createJbpmContext();
| try {
| // Invoke persistence operations here
| Session s = jbpmContext.getSession();
| s.save(stu);
| } finally {
| jbpmContext.close();
| }
|
the 'stu' is a member variable of MessageActionHandler.
I first ran the sample SimpleProcessTest as JUnit test, and got 2 students named
"the hell" in the table student ('cos the action was called twice in the
test). Then I used JBoss IDE to deploy the process. The deployed archive includes the
process, MessageActionHandler, the dgbdatamodel package, hibernate.cfg.xml as well as
Student.hbm.xml. After logging in in the browser I started a new 'simple' process,
after input 'color' and 'size' and clicked "Save and Close Task"
(and the action handler is called), i got
| javax.servlet.ServletException: Error calling action method of component with id
taskform:transitionButton
| ...
| root cause
| javax.faces.FacesException: Error calling action method of component with id
taskform:transitionButton
| ...
|
the log says sth like:
| ...
| 19:39:53,765 DEBUG [Services] closing service 'persistence':
org.jbpm.persistence.db.DbPersistenceService@ec1e6f
| 19:39:53,765 DEBUG [DbPersistenceService] committing hibernate transaction
| 19:39:53,781 DEBUG [DbPersistenceService] closing hibernate session
| 19:39:53,781 ERROR [GraphElement] action threw exception: Unknown entity:
dgbdatamodel.Student
| org.hibernate.MappingException: Unknown entity: dgbdatamodel.Student
| at
org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:610)
| at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1246)
| ...
|
I guess the deployed version didn't include the mapping declared in
"Student.hbm.xml" (since if I don't call "s.save(stu)" in the
action handler, no exception was thrown).
I searched the forum for the answer, but in vain, the closest one I got is:
http://www.jboss.com/index.html?module=bb&op=viewtopic&t=89365
However, I just started learning jBPM and got stuck in here for quite a few days.
Anyone's kind enough to give me some clues? Or what is the right way to do the job?
Thanks a million!
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