protected String endpoint() {
        if (!entry.hasRequest()) {
            return "/";
        }
        final HTTPRequestProperties request = entry.getRequest();
        final String method = request.getRequestMethod().name();
        return method + ":" + request.getPath();
    }
Adapt the {@code entry} into an upstream metrics {@link HTTPServiceMeshMetric.Builder}.

@return the {@link HTTPServiceMeshMetric.Builder} adapted from the given entry.
oap-server/server-receiver-plugin/envoy-metrics-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/envoy/als/LogEntry2MetricsAdapter.java