While trying to show hibernate persistence with jBPM v3.2.x I ran into a problem with a missing dependency. Details of the simple POJO class I was persisting, the hibernate mappings, error message encountered and solution tracing are provided below for those interested:
package com.sample.model;
// Sample person object for persistence checking.
public class Person {
private Integer ssn;
private String lastname;
private String firstname;
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getFirstname() {
return firstname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getLastname() {
return lastname;
}
public void setSSN(Integer ssn) {
this.ssn = ssn;
}
public Integer getSSN() {
return ssn;
}
}
The hibernate mappings were put into the person.hbm.xml file:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.sample.model" auto-import="false" default-access="field">
<class name="Person">
<id name="ssn" column="SSN"><generator class="native" /></id>
<property name="lastname" column="LASTNAME" />
<property name="firstname" column="FIRSTNAME" />
</class>
</hibernate-mapping>
// First the errors I was getting in my logging (just the last bits):
...
DEBUG GraphElement - event 'process-start' on ProcessDefinition(main_flow)
for Token(/)
DEBUG VariableContainer - create variable 'person' in 'TokenVariableMap[/]'
with value 'com.sample.model.Person@1dfc547'
DEBUG Converters - adding converter 'D', 'org.jbpm.context.exe.converter.DoubleToStringConverter'
DEBUG Converters - adding converter 'C', 'org.jbpm.context.exe.converter.CharacterToStringConverter'
DEBUG Converters - adding converter 'B', 'org.jbpm.context.exe.converter.BooleanToStringConverter'
DEBUG Converters - adding converter 'Y', 'org.jbpm.context.exe.converter.BytesToByteArrayConverter'
DEBUG Converters - adding converter 'A', 'org.jbpm.context.exe.converter.DateToLongConverter'
DEBUG Converters - adding converter 'R', 'org.jbpm.context.exe.converter.SerializableToByteArrayConverter'
DEBUG Converters - adding converter 'I', 'org.jbpm.context.exe.converter.IntegerToLongConverter'
DEBUG Converters - adding converter 'H', 'org.jbpm.context.exe.converter.ShortToLongConverter'
DEBUG Converters - adding converter 'G', 'org.jbpm.context.exe.converter.FloatToDoubleConverter'
DEBUG Converters - adding converter 'F', 'org.jbpm.context.exe.converter.FloatToStringConverter'
DEBUG Converters - adding converter 'E', 'org.jbpm.context.exe.converter.ByteToLongConverter'
DEBUG HibernateLongIdMatcher - no current context so valueClass
cannot be stored as a long-id-ref to a hibernate object
DEBUG HibernateStringIdMatcher - no current context so valueClass
cannot be stored as a string-id-ref to a hibernate object
The path to the missing interface we traced from jbpm-jpdl.jar -> org.jbpm.context.exe -> jbpm.varmapping.xml file contains the following mapping:
<!-- JSR 170 JCR Node -->
<jbpm-type>
<matcher>
<bean class="org.jbpm.context.exe.matcher.JcrNodeMatcher" />
</matcher>
<variable-instance class="org.jbpm.context.exe.variableinstance.JcrNodeInstance" />
</jbpm-type>
This leads to org.jbpm.context.exe.matcher.JcrNodeMatcher.class which imports the class not included in jBPM:
/*
* Snipped the license code.
*/
package org.jbpm.context.exe.matcher;
import javax.jcr.Node; <<<<<<<<<<<<<< MISSING!!!!
import org.jbpm.context.exe.JbpmTypeMatcher;
public class JcrNodeMatcher implements JbpmTypeMatcher {
private static final long serialVersionUID = 1L;
public boolean matches(Object value) {
return (Node.class.isAssignableFrom(value.getClass()));
}
}
My solution: added external jar to projects classpath, jcr-1.0.jar which provides the needed interface interface. Hope this saves you some time!
