Fix #660: Add the rate metric type

Author: mdboom

schemas/glean/glean/glean.1.schema.json

@@ -276,7 +276,20 @@
         "labeled_rate": {
           "additionalProperties": {
             "additionalProperties": {
-              "type": "integer"
+              "additionalProperties": false,
+              "properties": {
+                "denominator": {
+                  "type": "integer"
+                },
+                "numerator": {
+                  "type": "integer"
+                }
+              },
+              "required": [
+                "numerator",
+                "denominator"
+              ],
+              "type": "object"
             },
             "propertyNames": {
               "comment": "This must be at least the length of 'category.name' metric names to support error reporting",
@@ -541,7 +554,20 @@
         },
         "rate": {
           "additionalProperties": {
-            "type": "integer"
+            "additionalProperties": false,
+            "properties": {
+              "denominator": {
+                "type": "integer"
+              },
+              "numerator": {
+                "type": "integer"
+              }
+            },
+            "required": [
+              "numerator",
+              "denominator"
+            ],
+            "type": "object"
           },
           "propertyNames": {
             "maxLength": 61,

templates/include/glean/CHANGELOG.md

@@ -62,3 +62,5 @@
   section.
 
 - Added `sum` to histogram and `timing_distribution` as optional parameter.
+
+- The `rate` metric type is an object with a `numerator` and `denominator`.

templates/include/glean/rate.1.schema.json

@@ -1,3 +1,16 @@
 {
-  "type": "integer"
+  "type": "object",
+  "properties": {
+    "numerator": {
+      "type": "integer"
+    },
+    "denominator": {
+      "type": "integer"
+    }
+  },
+  "required": [
+    "numerator",
+    "denominator"
+  ],
+  "additionalProperties": false
 }