From c2ddd0f01ab5544b174828a1283a6635f786fea8 Mon Sep 17 00:00:00 2001
From: Daniel Dyla <dyladan@users.noreply.github.com>
Date: Mon, 2 Dec 2019 17:08:21 -0500
Subject: [PATCH] chore: alias static labels (#576)

---
 packages/opentelemetry-metrics/src/Meter.ts | 44 +++++++++++----------
 1 file changed, 23 insertions(+), 21 deletions(-)

diff --git a/packages/opentelemetry-metrics/src/Meter.ts b/packages/opentelemetry-metrics/src/Meter.ts
index 34622af07e..ba2b74cd56 100644
--- a/packages/opentelemetry-metrics/src/Meter.ts
+++ b/packages/opentelemetry-metrics/src/Meter.ts
@@ -42,6 +42,8 @@ export class Meter implements types.Meter {
   private readonly _metrics = new Map<string, Metric<BaseHandle>>();
   private readonly _exporters: MetricExporter[] = [];
 
+  readonly labels = Meter.labels;
+
   /**
    * Constructs a new Meter instance.
    */
@@ -150,6 +152,27 @@ export class Meter implements types.Meter {
     this._exporters.push(exporter);
   }
 
+  /**
+   * Provide a pre-computed re-useable LabelSet by
+   * converting the unordered labels into a canonicalized
+   * set of lables with an unique identifier, useful for pre-aggregation.
+   * @param labels user provided unordered Labels.
+   */
+  static labels(labels: types.Labels): types.LabelSet {
+    const keys = Object.keys(labels).sort();
+    const identifier = keys.reduce((result, key) => {
+      if (result.length > 2) {
+        result += ',';
+      }
+      return (result += key + ':' + labels[key]);
+    }, '|#');
+    const sortedLabels: types.Labels = {};
+    keys.forEach(key => {
+      sortedLabels[key] = labels[key];
+    });
+    return new LabelSet(identifier, sortedLabels);
+  }
+
   /**
    * Send a single metric by name to all registered exporters
    */
@@ -188,27 +211,6 @@ export class Meter implements types.Meter {
     this._metrics.set(name, metric);
   }
 
-  /**
-   * Provide a pre-computed re-useable LabelSet by
-   * converting the unordered labels into a canonicalized
-   * set of labels with an unique identifier, useful for pre-aggregation.
-   * @param labels user provided unordered Labels.
-   */
-  labels(labels: types.Labels): types.LabelSet {
-    const keys = Object.keys(labels).sort();
-    const identifier = keys.reduce((result, key) => {
-      if (result.length > 2) {
-        result += ',';
-      }
-      return (result += key + ':' + labels[key]);
-    }, '|#');
-    const sortedLabels: types.Labels = {};
-    keys.forEach(key => {
-      sortedLabels[key] = labels[key];
-    });
-    return new LabelSet(identifier, sortedLabels);
-  }
-
   /**
    * Ensure a metric name conforms to the following rules:
    *