Spring throw error while converting MyEventListener to ActivitiEventListner

[bhuvangupta]

Error creating bean with name 'processEngineConfiguration' defined in ServletContext resource [/WEB-INF/activiti-standalone-context.xml]: Initialization of bean failed;
 nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'java.util.ArrayList' to required type 'java.util.List' for property 'eventListeners'; 
nested exception is java.lang.IllegalStateException: Cannot convert value of type [main.MyEventListener] to required type [org.activiti.engine.delegate.event.ActivitiEventListener] for property 'eventListeners[0]': no matching editors or conversion strategy found
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Bean defination in actitivi-standalone-context.xml

   <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">
     <property name="dataSource" ref="dataSource" />
     <property name="transactionManager" ref="transactionManager" />
     <property name="databaseSchemaUpdate" value="true" />
     <property name="jobExecutorActivate" value="true" />
    <property name="customFormTypes">   
      <list>
        <bean class="org.activiti.explorer.form.UserFormType"/>
        <bean class="org.activiti.explorer.form.ProcessDefinitionFormType"/> 
        <bean class="org.activiti.explorer.form.MonthFormType"/>   
      </list>
    </property>
   <property name="eventListeners">
      <list>
         <bean class="main.MyEventListener" />
      </list>
    </property>
  </bean>
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main.MyEventListener is a copy from the documentation.

i am on 5.15.1 and using tomcat 6

Any idea about the error ?

[trademak]

Please include the code of your main.MyEventListener class. Are you implementing the ActivitiEventListener interface?

Best regards,

[bhuvangupta]

<code>
package main;

import org.activiti.engine.delegate.event.ActivitiEvent;
import org.activiti.engine.delegate.event.ActivitiEventListener;

public class MyEventListener implements ActivitiEventListener {

  @Override
  public void onEvent(ActivitiEvent event) {
   
    switch (event.getType()) {
   
      case JOB_EXECUTION_SUCCESS:
        System.out.println("A job well done!");
        break;
 
      case JOB_EXECUTION_FAILURE:
        System.out.println("A job has failed…");
        break;
       
      default:
        System.out.println("Event received: " + event.getType());
    }
  }

  @Override
  public boolean isFailOnException() {
    // The logic in the onEvent method of this listener is not critical, exceptions
    // can be ignored if logging fails…
    return false;
  }
}

</code>

[bhuvangupta]

change the file extension to .jar .
cant upload file with different extension other then .txt

[bhuvangupta]

I have also tried with following scenarios
First case:
[1] download tomcat 6 and install it
[2] download activiti 5.15.1
[3] extract activiti war in webapps folder of tomcat and copy all activiti/lib/*.jar to tomcat/lib
[4] created a jar <code>myEventJar</code> containing MyEventListener.class (i have attached my jar)
[5]  change the activiti-explorer war to change activiti-standalone-context.xml (i have attached my xml)
[6] put myEventjar in lib folder of tomcat.
[7] start the tomcat
>>>> i see above error.
___________________________


Second case:
Extact same as first case + add all the latest spring jars to lib folder of tomcat
>>> same error.
___________________________
i am running it on window 7 with oracle java 6

[bhuvangupta]

Hi.. I was able to resolve the issue, the problem was:
[1] I had to turn on the unpackwar property true in server.xml
<code><Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true"></code>
[2] The event listener need to be inside exploded war.

[trademak]

Tomcat unpacks the WAR by default, so don't understand why a specific configuration would be needed.
Yes, your JAR file needs to be part of the WEB-INF/lib folder of the Explorer and REST application.

Best regards,