public String requeueSweep(String workflowId) {
        boolean pushed =
                queueDAO.pushIfNotExists(
                        Utils.DECIDER_QUEUE,
                        workflowId,
                        properties.getWorkflowOffsetTimeout().getSeconds());
        return pushed + "." + workflowId;
    }
Queue up the workflow for sweep.

@param workflowId Id of the workflow
@return the id of the workflow instance that can be use for tracking.
core/src/main/java/com/netflix/conductor/service/AdminServiceImpl.java