From 1110808a9d39d4b808aef724c861a2e1a38d2a69 Mon Sep 17 00:00:00 2001
From: Devtools Arcadia <arcadia-devtools@yandex-team.ru>
Date: Mon, 7 Feb 2022 18:08:42 +0300
Subject: intermediate changes ref:cde9a383711a11544ce7e107a78147fb96cc4029
---
.../monlib/encode/prometheus/prometheus_model.h | 70 ++++++++++++++++++++++
1 file changed, 70 insertions(+)
create mode 100644 library/cpp/monlib/encode/prometheus/prometheus_model.h
(limited to 'library/cpp/monlib/encode/prometheus/prometheus_model.h')
diff --git a/library/cpp/monlib/encode/prometheus/prometheus_model.h b/library/cpp/monlib/encode/prometheus/prometheus_model.h
new file mode 100644
index 0000000000..cb7f2cb15b
--- /dev/null
+++ b/library/cpp/monlib/encode/prometheus/prometheus_model.h
@@ -0,0 +1,70 @@
+#pragma once
+
+#include <util/generic/strbuf.h>
+
+
+namespace NMonitoring {
+namespace NPrometheus {
+
+ //
+ // Prometheus specific names and validation rules.
+ //
+ // See https://github.com/prometheus/docs/blob/master/content/docs/instrumenting/exposition_formats.md
+ // and https://github.com/prometheus/common/blob/master/expfmt/text_parse.go
+ //
+
+ inline constexpr TStringBuf BUCKET_SUFFIX = "_bucket";
+ inline constexpr TStringBuf COUNT_SUFFIX = "_count";
+ inline constexpr TStringBuf SUM_SUFFIX = "_sum";
+ inline constexpr TStringBuf MIN_SUFFIX = "_min";
+ inline constexpr TStringBuf MAX_SUFFIX = "_max";
+ inline constexpr TStringBuf LAST_SUFFIX = "_last";
+
+ // Used for the label that defines the upper bound of a bucket of a
+ // histogram ("le" -> "less or equal").
+ inline constexpr TStringBuf BUCKET_LABEL = "le";
+
+
+ inline bool IsValidLabelNameStart(char ch) {
+ return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || ch == '_';
+ }
+
+ inline bool IsValidLabelNameContinuation(char ch) {
+ return IsValidLabelNameStart(ch) || (ch >= '0' && ch <= '9');
+ }
+
+ inline bool IsValidMetricNameStart(char ch) {
+ return IsValidLabelNameStart(ch) || ch == ':';
+ }
+
+ inline bool IsValidMetricNameContinuation(char ch) {
+ return IsValidLabelNameContinuation(ch) || ch == ':';
+ }
+
+ inline bool IsSum(TStringBuf name) {
+ return name.EndsWith(SUM_SUFFIX);
+ }
+
+ inline bool IsCount(TStringBuf name) {
+ return name.EndsWith(COUNT_SUFFIX);
+ }
+
+ inline bool IsBucket(TStringBuf name) {
+ return name.EndsWith(BUCKET_SUFFIX);
+ }
+
+ inline TStringBuf ToBaseName(TStringBuf name) {
+ if (IsBucket(name)) {
+ return name.SubString(0, name.length() - BUCKET_SUFFIX.length());
+ }
+ if (IsCount(name)) {
+ return name.SubString(0, name.length() - COUNT_SUFFIX.length());
+ }
+ if (IsSum(name)) {
+ return name.SubString(0, name.length() - SUM_SUFFIX.length());
+ }
+ return name;
+ }
+
+} // namespace NPrometheus
+} // namespace NMonitoring
--
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