@Override
    public void build() {
        if (nonNull(serviceMeta)) {
            sourceReceiver.receive(serviceMeta);
        }
        if (nonNull(instanceMeta)) {
            sourceReceiver.receive(instanceMeta);
        }
        if (nonNull(endpointMeta)) {
            sourceReceiver.receive(endpointMeta);
        }
    }
Generate service, service instance and endpoint traffic by log data.
oap-server/analyzer/log-analyzer/src/main/java/org/apache/skywalking/oap/log/analyzer/provider/log/listener/TrafficSinkListener.java