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Joey Armstronge8c091f2023-01-17 16:56:26 -05001// Copyright The OpenTelemetry Authors
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package metric
16
17import "go.opentelemetry.io/otel/unit"
18
19// Descriptor contains all the settings that describe an instrument,
20// including its name, metric kind, number kind, and the configurable
21// options.
22type Descriptor struct {
23 name string
24 kind Kind
25 numberKind NumberKind
26 config InstrumentConfig
27}
28
29// NewDescriptor returns a Descriptor with the given contents.
30func NewDescriptor(name string, mkind Kind, nkind NumberKind, opts ...InstrumentOption) Descriptor {
31 return Descriptor{
32 name: name,
33 kind: mkind,
34 numberKind: nkind,
35 config: NewInstrumentConfig(opts...),
36 }
37}
38
39// Name returns the metric instrument's name.
40func (d Descriptor) Name() string {
41 return d.name
42}
43
44// MetricKind returns the specific kind of instrument.
45func (d Descriptor) MetricKind() Kind {
46 return d.kind
47}
48
49// Description provides a human-readable description of the metric
50// instrument.
51func (d Descriptor) Description() string {
52 return d.config.Description
53}
54
55// Unit describes the units of the metric instrument. Unitless
56// metrics return the empty string.
57func (d Descriptor) Unit() unit.Unit {
58 return d.config.Unit
59}
60
61// NumberKind returns whether this instrument is declared over int64,
62// float64, or uint64 values.
63func (d Descriptor) NumberKind() NumberKind {
64 return d.numberKind
65}
66
67// InstrumentationName returns the name of the library that provided
68// instrumentation for this instrument.
69func (d Descriptor) InstrumentationName() string {
70 return d.config.InstrumentationName
71}
72
73// InstrumentationVersion returns the version of the library that provided
74// instrumentation for this instrument.
75func (d Descriptor) InstrumentationVersion() string {
76 return d.config.InstrumentationVersion
77}