private void toService(String serviceName, Layer layer) {
        ServiceTraffic s = new ServiceTraffic();
        s.setName(requireNonNull(serviceName));
        s.setTimeBucket(TimeBucket.getMinuteTimeBucket(System.currentTimeMillis()));
        s.setLayer(layer);
        MetricsStreamProcessor.getInstance().in(s);
    }
analyse intends to parse expression with input samples to meter-system metrics.

@param sampleFamilies input samples.
oap-server/analyzer/meter-analyzer/src/main/java/org/apache/skywalking/oap/meter/analyzer/Analyzer.java