public void getParentServiceInstance(DelegateExecution execution) {
		logger.trace("getParentServiceInstance ")
		try {
			String serviceInstanceId = execution.getVariable('parentServiceInstanceId')

			AAIResourcesClient resourceClient = new AAIResourcesClient()
			AAIResourceUri uri = AAIUriFactory.createResourceUri(AAIObjectType.SERVICE_INSTANCE, serviceInstanceId)

			try {
				//just to make sure the serviceInstance exists
				uri.build()
				execution.setVariable("PSI_resourceLink", uri)
			} catch (NotFoundException e) {
				exceptionUtil.buildAndThrowWorkflowException(execution, 2500, "Service instance was not found in aai")
			}

		}catch(BpmnError e) {
			throw e;
		}catch (Exception ex){
			String msg = "Exception in getParentServiceInstance. " + ex.getMessage()
			logger.debug(msg)
			exceptionUtil.buildAndThrowWorkflowException(execution, 7000, msg)
		}
		logger.trace("Exit getParentServiceInstance ")
	}