topic Re: how to map java class with activit diagram in Alfresco Archive

how to map java class with activit diagram

chetan1 — Fri, 07 Mar 2014 09:16:33 GMT

hi someone please give me the solution for mapping the java class

Re: how to map java class with activit diagram

frederikherema1 — Mon, 10 Mar 2014 09:32:21 GMT

Can you elaborate on your question? Not really clear what you're trying to do here…

Re: how to map java class with activit diagram

chetan1 — Mon, 10 Mar 2014 09:55:12 GMT

I have assigned a class to UserTask, and while starting a process i am getting an Exception "Couldn't Instantiate class com.demo.TestListener". I have implemented TaskListener on my class TestListener.

Re: how to map java class with activit diagram

jbarrez — Mon, 10 Mar 2014 11:01:03 GMT

Is that class on the classpath?

Re: how to map java class with activit diagram

chetan1 — Tue, 11 Mar 2014 04:23:51 GMT

yes it is in the lib of activiti explorer war D:\apache 7\webapps\activiti-explorer\WEB-INF\lib still gives warning class could not instantiate

Re: how to map java class with activit diagram

jbarrez — Tue, 11 Mar 2014 12:52:36 GMT

mm that should do it.

Can you post your listener here? And the part of the process where you want to use it?

Re: how to map java class with activit diagram

chetan1 — Wed, 12 Mar 2014 04:05:59 GMT

package demo.action;

import java.util.List;

import org.activiti.engine.ActivitiException;
import org.activiti.engine.delegate.DelegateTask;
import org.activiti.engine.delegate.ExecutionListener;
import org.activiti.engine.delegate.TaskListener;
import org.activiti.engine.impl.bpmn.parser.FieldDeclaration;
import org.activiti.engine.impl.context.Context;
import org.activiti.engine.impl.delegate.TaskListenerInvocation;
import org.activiti.engine.impl.util.ReflectUtil;

public class DemoClass implements TaskListener {
protected ExecutionListener executionListenerInstance;
protected TaskListener taskListenerInstance;
protected String className;
protected List<FieldDeclaration> fieldDeclarations;
/**
*
*/
private static final long serialVersionUID = 1L;

/**
* @see org.activiti.engine.delegate.TaskListener#notify(org.activiti.engine.delegate.DelegateTask)
*/
public DemoClass(String className, List<FieldDeclaration> fieldDeclarations) {
this.className = className;
this.fieldDeclarations = fieldDeclarations;
}

public DemoClass(Class<?> clazz, List<FieldDeclaration> fieldDeclarations) {
this(clazz.getName(), fieldDeclarations);
}

@Override
public void notify(DelegateTask delegateTask) {
System.out.println("in notify");
delegateTask.setVariable("input", 0);
if (taskListenerInstance == null) {
   taskListenerInstance = getTaskListenerInstance();
}
try {
   Context.getProcessEngineConfiguration()
     .getDelegateInterceptor()
     .handleInvocation(
       new TaskListenerInvocation(taskListenerInstance,
         delegateTask));
} catch (Exception e) {
   throw new ActivitiException(
     "Exception while invoking TaskListener: " + e.getMessage(),
     e);
}
}

private TaskListener getTaskListenerInstance() {
Object delegateInstance = instantiateDelegate(className,
    fieldDeclarations);
if (delegateInstance instanceof TaskListener) {
   return (TaskListener) delegateInstance;
} else {
   throw new ActivitiException(delegateInstance.getClass().getName()
     + " doesn't implement " + TaskListener.class);
}
}

public static Object instantiateDelegate(String className,
   List<FieldDeclaration> fieldDeclarations) {
Object object = ReflectUtil.instantiate(className);
System.out.println("object");
// applyFieldDeclaration(fieldDeclarations, object);
return object;
}

public void setLookupField(String str) {
System.out.println("in lookup");
// str.getVariable("input");
String.valueOf(0);
}

}

Re: how to map java class with activit diagram

jbarrez — Mon, 17 Mar 2014 08:07:23 GMT

THat is not your process but the task listener. Im assuming that one is good, and it's the engine who cant find the class.

hence, can you post the process XML you use to reference this task listener?

Re: how to map java class with activit diagram

chetan1 — Mon, 17 Mar 2014 13:22:03 GMT

HI,
       This is my xml file attach with is post please check and reply ASAP
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans   http://www.springframework.org/schema/beans/spring-beans.xsd">

<bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">

    <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/activiti" />
    <property name="jdbcDriver" value="com.mysql.jdbc.Driver" />
    <property name="jdbcUsername" value="root" />
    <property name="jdbcPassword" value="root" />
    <property name="databaseSchemaUpdate" value="true" />
    <property name="jobExecutorActivate" value="false" />
</bean>
</beans>

Re: how to map java class with activit diagram

jbarrez — Wed, 19 Mar 2014 14:35:36 GMT

Sigh … your PROCESS XML … not your config.

Re: how to map java class with activit diagram

chetan1 — Thu, 20 Mar 2014 13:27:47 GMT

Sorry I did not understand which xml you said web xml or another one

Re: how to map java class with activit diagram

jbarrez — Mon, 24 Mar 2014 13:27:44 GMT

Activiti processes are written in XML. I need the file that described your process. In xml.