Replace Temporality with Kind; Type with ValueType

opentelemetry/proto/metrics/v1/gen.go

@@ -0,0 +1,111 @@
+// Copyright 2020, OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Notes: This code generates the Kind enum hex in metrics.proto.  To
+// run this code, execute:
+//
+//   go run gen.go > out.go && go run out.go
+//
+// The output of this program MUST be tested in an external module,
+// using the output of protoc.
+
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"go/format"
+	"os"
+	"strconv"
+	"strings"
+)
+
+var (
+	cumulativeProps = []string{"Instantaneous", "Delta", "Cumulative"}
+	structureProps  = []string{"Adding_Monotonic", "Adding", "Grouping"}
+	syncProps       = []string{"Continuous", "Snapshot"}
+)
+
+func main() {
+	var buf bytes.Buffer
+	buf.WriteString(`package main
+
+import "fmt"
+
+
+type (
+	Kind int
+)
+
+const (
+        INVALID = 0
+
+	// One of the following three MUST be set. There are 3 exclusive Temporality kinds.
+	INSTANTANEOUS = 1 << 0
+	DELTA         = 2 << 0
+	CUMULATIVE    = 3 << 0
+
+	// One of the following three MUST be set. There are 3 exclusive Structure kinds.
+	GROUPING         = 1 << 2
+	ADDING           = 2 << 2
+	ADDING_MONOTONIC = 3 << 2
+
+	// May be set for any instrument.
+	SNAPSHOT = 1 << 4
+)
+
+var (
+`)
+	var fullnames []string
+	var fullvalues []string
+
+	for _, a := range structureProps {
+		for _, c := range cumulativeProps {
+			for _, s := range syncProps {
+				if c == "Instantaneous" && s == "Snapshot" {
+					continue
+				}
+				sfrag := ""
+				sname := ""
+				if s == "Snapshot" {
+					sfrag = "|SNAPSHOT"
+					sname = "_SNAPSHOT"
+				}
+				fullname := fmt.Sprint(strings.ToUpper(a), "_", strings.ToUpper(c), sname)
+				fullnames = append(fullnames, fullname)
+				fullvalue := fmt.Sprint("", strings.ToUpper(a), "|", strings.ToUpper(c), sfrag)
+				fullvalues = append(fullvalues, fullvalue)
+				buf.WriteString(fmt.Sprint(fullname, " Kind = ", fullvalue, "\n"))
+			}
+		}
+	}
+	buf.WriteString(`)
+
+func main() {
+`)
+
+	for i, fn := range fullnames {
+		buf.WriteString(fmt.Sprint(`fmt.Printf("  %s = %s; // %s\n", `, strconv.Quote(fn), ",", `fmt.Sprintf("%#x",`, fn, `)`, ",", strconv.Quote(fullvalues[i]), ")\n"))
+	}
+	buf.WriteRune('}')
+
+	src, err := format.Source(buf.Bytes())
+	if err != nil {
+		fmt.Println("SOURCE WAS\n", string(buf.Bytes()))
+		panic(err)
+	}
+	if nwritten, err := os.Stdout.Write(src); err != nil || nwritten != len(src) {
+		panic(err)
+	}
+}