topic Re: How to setup a Service Task class via El Expression in Alfresco Archive

How to setup a Service Task class via El Expression

asdfg195 — Thu, 05 Nov 2015 22:12:07 GMT

I am using Activiti 5.18.0. My process has a slightly complicated error handling that needs to go around every Service Task. Instead of replicating that everywhere, I want to create a subprocess that does the error handling around a simple Service Task. I am passing in the fully qualified Class nam

Re: How to setup a Service Task class via El Expression

martin_grofcik — Fri, 06 Nov 2015 07:29:58 GMT

Hi,

I would say that class name is not expression


public class ClassDelegate extends AbstractBpmnActivityBehavior implements TaskListener, ExecutionListener, SubProcessActivityBehavior {
  
  protected String className;

Change it to the expression and make pull request.

Regards
Martin

Re: How to setup a Service Task class via El Expression

asdfg195 — Fri, 06 Nov 2015 18:39:14 GMT

I decided to go a different route and go with Reflections to solve my issue. Here is my code in case someone wants to try this in the future


public class ServiceTaskDelegate implements Serializable,ActivityBehavior {

  private static final long serialVersionUID = -2093463145176121341L;

  @Override
  public void execute(ActivityExecution execution) throws Exception {
    String className = execution.getVariable("taskClass", String.class);
    
    Class<?> clazz = Class.forName(className);
    Constructor<ActivityBehavior> constructor = (Constructor<ActivityBehavior>) clazz.getConstructor();
    ActivityBehavior delegate = constructor.newInstance();
    delegate.execute(execution);
  }
}