problem to find JavaDelegate class

[ridottiastozze]

Hi everyone,
I'm not able to link my java class in execution. I would like to use a simple JavaDelegate class but Tomcat launches the exception:
     caused by: org.activiti.engine.ActivitiClass LoadingException: class not found: packageprovajar.recuperaValori

I write the code:

package packageprovajar;
import org.activiti.engine.delegate.DelegateExecution;

public class recuperaValori implements JavaDelegate {
    
     public void execute(DelegateExecution execution) throws Exception {
       System.out.println("sono in recupera valori");
     }
}

<userTask id="usertask2" name="verifica disponibilita libro1" activiti:candidateGroups="management"></userTask>
    <sequenceFlow id="flow2" name="" sourceRef="usertask1" targetRef="usertask2"></sequenceFlow>
    <serviceTask id="servicetask1" name="Service Task1" activiti:class="packageprovajar.recuperaValori">
      <extensionElements>
        <activiti:field name="text">
          <activiti:string>Hello World</activiti:string>
        </activiti:field>
      </extensionElements>
    </serviceTask>

I have inserted the .jar in the path  C:\activiti-5.8\apps\apache-tomcat-6.0.32\webapps\activiti-rest\WEB-INF\lib
and in the path C:\activiti-5.8\apps\apache-tomcat-6.0.32\lib  but Tomcat launches always the same exception.
Probably i have inserted the .jar file in the wrong path but i'm not able to find the correct one.
Anyone can help me? thank you.

[trademak]

Hi,

Are you using the process definition from the Activiti Explorer? Because then you need to add the JAR there as well.

Best regards,

[ridottiastozze]

Thank you for your answer. I upload the bar file (my bpmn20.xml file) through the webapp user interface. Are you referring to the path: C:\activiti-5.8\apps\apache-tomcat-6.0.32\webapps\activiti-explorer\WEB-INF\lib ? I have tryed to insert the .jar there, but tomcat gives me the same exception. Do you think that I have to set a classpath variable?
ps: Eclipse gives me this the report in the bpmn20.xml file : - cvc-attribute.3: The value 'packageprovajar.recuperaValori' of attribute 'activiti:class' on element 'serviceTask' is not valid with respect to its type, 'null'. It can be related to my problem?
Best regards

[trademak]

Hi,

When you copy the JAR to the activiti-explorer/WEB-INF/lib folder the classes in the JAR file are available in the Activiti Explorer.
Please validate of the contents of the JAR file are correct.

Best regards,

[ridottiastozze]

hi,
when I validate the eclipse project the compiler doesn't give me any problems or warnings. I have solved the report in the bpmn20.xml file but I'm not able to solve the exception in the Activiti Explorer. I have inserted the .jar file in different directories: C:\activiti-5.8\apps\apache-tomcat-6.0.32\webapps\activiti-explorer\WEB-INF\lib   ,  C:\activiti-5.8\apps\apache-tomcat-6.0.32\webapps\activiti-rest\WEB-INF\lib ,
C:\activiti-5.8\apps\apache-tomcat-6.0.32\lib .   I have the same problem when i use the listeners.
I attach the modified code:
 
<process id="provaJavaDelegate" name="delegateJar">  
    <startEvent id="startevent1" name="Start"></startEvent>  
    <userTask id="usertask1" name="inserimento dati libro1" activiti:candidateGroups="accountancy"></userTask>  
    <userTask id="usertask2" name="verifica disponibilita libro1" activiti:candidateGroups="management"></userTask>    
    <serviceTask id="servicetask1"
        activiti:class="org.activiti.examples.bpmn.servicetask.BackwardsCompatibleExpressionDelegate" name="javaCode">     
</serviceTask>      
    <endEvent id="endevent1" name="End"></endEvent>   
    <sequenceFlow id="flow1" name="" sourceRef="startevent1" targetRef="usertask1"></sequenceFlow>
    <sequenceFlow id="flow2" name="" sourceRef="usertask1" targetRef="usertask2"></sequenceFlow>
    <sequenceFlow id="flow3" name="" sourceRef="usertask2" targetRef="servicetask1"></sequenceFlow>
    <sequenceFlow id="flow4" name="" sourceRef="servicetask1" targetRef="endevent1"></sequenceFlow>
  </process>
 
public class BackwardsCompatibleExpressionDelegate implements JavaDelegate {  
   public void execute(DelegateExecution execution) throws Exception {
    System.out.println(" I am in BackwardsCompatibleExpressionDelegate….");
   }
}

and a screen shot of my project

I'm sorry for the numerous messages but I need to solve this problem form my thesis.
best regards,

[lisama]

How are you creating the jar file? With the "create deployment artefacts" menuitem? That thing has a bug in it as far as I know, it creats jars without a MANIFEST in it. Try the ecplise export option instead.

[ridottiastozze]

Great,
now it works. I used "the create deployment artefacts" options. Using the export funtionality I'm able to link to java classes. Thank you for your helpfulness.

[valarmathi]

can u help me.
I have export the jar from the eclipse,then where can i put the file and how can i run it.
Please help me.

Thanks,
Valarmathi P