Executing Custom Execution Listener During Transition of Sequence Flow

Question

I extended SequenceFlowParseHandler for setting executionListener to sequence flow. By doing so I am able to execute my custom listener everytime a transition happens in the workflow.

ActivitiListener activitiListener = new ActivitiListener();
 activitiListener.setEvent(ExecutionListener.EVENTNAME_START);
 activitiListener.setImplementation("${customExecutionListener}");
 activitiListener.setImplementationType(ImplementationType.IMPLEMENTATION_TYPE_DELEGATEEXPRESSION);

I am using delegate Expression for implementation type but class fails to autowire beans in my customExecutionListener I dont know where i'm going wrong.

gdharley · Accepted Answer

Likely this is because your listener is running on a servlet thread that is not part of the spring application context.

One option is to use an application Context provider:

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

public class ApplicationContextProvider implements ApplicationContextAware{
     private static ApplicationContext context;
     public static ApplicationContext getApplicationContext() {    
         return context;
     }

@Override    public void setApplicationContext(ApplicationContext ac) throws BeansException {
        context = ac;
    }
}

This way you can retrieve the Spring application context and then the bean you need.

Greg

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