Improved how jobs are converted to JSON

lib/render_queue.py

@@ -165,16 +165,13 @@ class RenderQueue:
     def start_job(cls, job):
         logger.info('Starting {}render: {} - Priority {}'.format('scheduled ' if job.scheduled_start else '', job.name,
                                                                   job.priority))
-        job.worker.start()
+        job.start()
 
     @classmethod
     def cancel_job(cls, job):
         logger.info('Cancelling job ID: {}'.format(job.id))
-        if job.render_status() in [RenderStatus.NOT_STARTED, RenderStatus.RUNNING, RenderStatus.ERROR]:
-            job.worker.stop()
-            job.worker.status = RenderStatus.CANCELLED
-            return True
-        return False
+        job.stop()
+        return job.render_status == RenderStatus.CANCELLED
 
     @classmethod
     def renderer_instances(cls):