package listeners;

import java.util.Set;

import org.jbpm.api.Configuration;
import org.jbpm.api.ProcessEngine;
import org.jbpm.api.TaskService;
import org.jbpm.api.listener.EventListener;
import org.jbpm.api.listener.EventListenerExecution;
import org.jbpm.api.task.Task;

public class TaskEventListener implements EventListener {

	private static final long serialVersionUID = 1L;
	private ProcessEngine processEngine;
	private TaskService taskService;
	
	public TaskEventListener() {
		processEngine = Configuration.getProcessEngine();
		taskService = processEngine.getTaskService();
	}

	@Override
	public void notify(EventListenerExecution execution) throws Exception {
		Set<String> activities = execution.findActiveActivityNames();
		String activityName = activities.iterator().next();
		// this works: task1 (= the name of the activity is shown)
		System.out.println(activityName);
		// this does not work, getting null here
		Task task = taskService.createTaskQuery().activityName(activityName).uniqueResult();
		org.hsqldb.util.DatabaseManager.main(new String[]{});
		System.out.println(task);
	}

}