public void setPipelineUuid(final String pipelineUuid) {
        this.pipelineUuid = pipelineUuid;
        if (processor != null) {
            processor.setPipelineUuid(pipelineUuid);
        }
    }
Zero means processing tasks are unbounded.
stroom-core-shared/src/main/java/stroom/processor/shared/ProcessorFilter.java