public String getPipelineUuid() {
        if (pipelineUuid == null) {
            Processor processor = getProcessor();
            if (processor != null) {
                pipelineUuid = processor.getPipelineUuid();
            }
        }
        return pipelineUuid;
    }
Zero means processing tasks are unbounded.
stroom-core-shared/src/main/java/stroom/processor/shared/ProcessorFilter.java