protected static String escapedName(final String name) {
        try {
            return ESCAPED_METRICS_NAME_CACHE.get(name);
        } catch (ExecutionException e) {
            log.error("Failed to get escaped metrics name from cache", e);
            return METRICS_NAME_ESCAPE_PATTERN.matcher(name).replaceAll("_");
        }
    }
PrometheusMetricConverter converts prometheus metrics to meter-system metrics, then store them to backend storage.
oap-server/analyzer/meter-analyzer/src/main/java/org/apache/skywalking/oap/meter/analyzer/prometheus/PrometheusMetricConverter.java