| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package metrix |
| 4 | |
| 5 | type writeView struct { |
| 6 | backend meterBackend |
| 7 | } |
| 8 | |
| 9 | type snapshotMeter struct { |
| 10 | backend meterBackend |
| 11 | prefix string |
| 12 | scope HostScope |
| 13 | sets []LabelSet |
| 14 | } |
| 15 | |
| 16 | type snapshotVecMeter struct { |
| 17 | meter *snapshotMeter |
| 18 | labelKeys []string |
| 19 | } |
| 20 | |
| 21 | type statefulMeter struct { |
| 22 | backend meterBackend |
| 23 | prefix string |
| 24 | scope HostScope |
| 25 | sets []LabelSet |
| 26 | } |
| 27 | |
| 28 | type statefulVecMeter struct { |
| 29 | meter *statefulMeter |
| 30 | labelKeys []string |
| 31 | } |
| 32 | |
| 33 | // SnapshotMeter returns a snapshot-mode declaration/write scope. |
| 34 | func (w *writeView) SnapshotMeter(prefix string) SnapshotMeter { |
| 35 | return &snapshotMeter{backend: w.backend, prefix: prefix} |
| 36 | } |
| 37 | |
| 38 | // StatefulMeter returns a stateful-mode declaration/write scope. |
| 39 | func (w *writeView) StatefulMeter(prefix string) StatefulMeter { |
| 40 | return &statefulMeter{backend: w.backend, prefix: prefix} |
| 41 | } |
| 42 | |
| 43 | func (m *snapshotMeter) WithLabels(labels ...Label) SnapshotMeter { |
| 44 | set := m.LabelSet(labels...) |
| 45 | return m.WithLabelSet(set) |
| 46 | } |
| 47 | |
| 48 | func (m *snapshotMeter) WithHostScope(scope HostScope) SnapshotMeter { |
| 49 | return &snapshotMeter{ |
| 50 | backend: m.backend, |
| 51 | prefix: m.prefix, |
| 52 | scope: mustNormalizeHostScope(scope), |
| 53 | sets: appendLabelSets(m.sets, nil), |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | func (m *snapshotMeter) WithLabelSet(labels ...LabelSet) SnapshotMeter { |
| 58 | for _, ls := range labels { |
| 59 | if ls.set == nil || ls.set.owner != m.backend { |
| 60 | panic(errForeignLabelSet) |
| 61 | } |
| 62 | } |
| 63 | return &snapshotMeter{backend: m.backend, prefix: m.prefix, scope: m.scope, sets: appendLabelSets(m.sets, labels)} |
| 64 | } |
| 65 | |
| 66 | func (m *snapshotMeter) Vec(labelKeys ...string) SnapshotVecMeter { |
| 67 | return &snapshotVecMeter{ |
| 68 | meter: m, |
| 69 | labelKeys: append([]string(nil), labelKeys...), |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | func (m *snapshotMeter) LabelSet(labels ...Label) LabelSet { |
| 74 | return m.backend.compileLabelSet(labels...) |
| 75 | } |
| 76 | |
| 77 | func (m *statefulMeter) WithLabels(labels ...Label) StatefulMeter { |
| 78 | set := m.LabelSet(labels...) |
| 79 | return m.WithLabelSet(set) |
| 80 | } |
| 81 | |
| 82 | func (m *statefulMeter) WithHostScope(scope HostScope) StatefulMeter { |
| 83 | return &statefulMeter{ |
| 84 | backend: m.backend, |
| 85 | prefix: m.prefix, |
| 86 | scope: mustNormalizeHostScope(scope), |
| 87 | sets: appendLabelSets(m.sets, nil), |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | func (m *statefulMeter) WithLabelSet(labels ...LabelSet) StatefulMeter { |
| 92 | for _, ls := range labels { |
| 93 | if ls.set == nil || ls.set.owner != m.backend { |
| 94 | panic(errForeignLabelSet) |
| 95 | } |
| 96 | } |
| 97 | return &statefulMeter{backend: m.backend, prefix: m.prefix, scope: m.scope, sets: appendLabelSets(m.sets, labels)} |
| 98 | } |
| 99 | |
| 100 | func (m *statefulMeter) Vec(labelKeys ...string) StatefulVecMeter { |
| 101 | return &statefulVecMeter{ |
| 102 | meter: m, |
| 103 | labelKeys: append([]string(nil), labelKeys...), |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | func (m *statefulMeter) LabelSet(labels ...Label) LabelSet { |
| 108 | return m.backend.compileLabelSet(labels...) |
| 109 | } |
| 110 | |
| 111 | func (m *snapshotVecMeter) Gauge(name string, opts ...InstrumentOption) SnapshotGaugeVec { |
| 112 | return m.meter.GaugeVec(name, m.labelKeys, opts...) |
| 113 | } |
| 114 | |
| 115 | func (m *snapshotVecMeter) WithHostScope(scope HostScope) SnapshotVecMeter { |
| 116 | return &snapshotVecMeter{ |
| 117 | meter: m.meter.WithHostScope(scope).(*snapshotMeter), |
| 118 | labelKeys: append([]string(nil), m.labelKeys...), |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | func (m *snapshotVecMeter) Counter(name string, opts ...InstrumentOption) SnapshotCounterVec { |
| 123 | return m.meter.CounterVec(name, m.labelKeys, opts...) |
| 124 | } |
| 125 | |
| 126 | func (m *snapshotVecMeter) Histogram(name string, opts ...InstrumentOption) SnapshotHistogramVec { |
| 127 | return m.meter.HistogramVec(name, m.labelKeys, opts...) |
| 128 | } |
| 129 | |
| 130 | func (m *snapshotVecMeter) Summary(name string, opts ...InstrumentOption) SnapshotSummaryVec { |
| 131 | return m.meter.SummaryVec(name, m.labelKeys, opts...) |
| 132 | } |
| 133 | |
| 134 | func (m *snapshotVecMeter) StateSet(name string, opts ...InstrumentOption) SnapshotStateSetVec { |
| 135 | return m.meter.StateSetVec(name, m.labelKeys, opts...) |
| 136 | } |
| 137 | |
| 138 | func (m *snapshotVecMeter) MeasureSetGauge(name string, opts ...InstrumentOption) SnapshotMeasureSetGaugeVec { |
| 139 | return m.meter.MeasureSetGaugeVec(name, m.labelKeys, opts...) |
| 140 | } |
| 141 | |
| 142 | func (m *snapshotVecMeter) MeasureSetCounter(name string, opts ...InstrumentOption) SnapshotMeasureSetCounterVec { |
| 143 | return m.meter.MeasureSetCounterVec(name, m.labelKeys, opts...) |
| 144 | } |
| 145 | |
| 146 | func (m *statefulVecMeter) Gauge(name string, opts ...InstrumentOption) StatefulGaugeVec { |
| 147 | return m.meter.GaugeVec(name, m.labelKeys, opts...) |
| 148 | } |
| 149 | |
| 150 | func (m *statefulVecMeter) WithHostScope(scope HostScope) StatefulVecMeter { |
| 151 | return &statefulVecMeter{ |
| 152 | meter: m.meter.WithHostScope(scope).(*statefulMeter), |
| 153 | labelKeys: append([]string(nil), m.labelKeys...), |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | func (m *statefulVecMeter) Counter(name string, opts ...InstrumentOption) StatefulCounterVec { |
| 158 | return m.meter.CounterVec(name, m.labelKeys, opts...) |
| 159 | } |
| 160 | |
| 161 | func (m *statefulVecMeter) Histogram(name string, opts ...InstrumentOption) StatefulHistogramVec { |
| 162 | return m.meter.HistogramVec(name, m.labelKeys, opts...) |
| 163 | } |
| 164 | |
| 165 | func (m *statefulVecMeter) Summary(name string, opts ...InstrumentOption) StatefulSummaryVec { |
| 166 | return m.meter.SummaryVec(name, m.labelKeys, opts...) |
| 167 | } |
| 168 | |
| 169 | func (m *statefulVecMeter) StateSet(name string, opts ...InstrumentOption) StatefulStateSetVec { |
| 170 | return m.meter.StateSetVec(name, m.labelKeys, opts...) |
| 171 | } |
| 172 | |
| 173 | func (m *statefulVecMeter) MeasureSetGauge(name string, opts ...InstrumentOption) StatefulMeasureSetGaugeVec { |
| 174 | return m.meter.MeasureSetGaugeVec(name, m.labelKeys, opts...) |
| 175 | } |
| 176 | |
| 177 | func (m *statefulVecMeter) MeasureSetCounter(name string, opts ...InstrumentOption) StatefulMeasureSetCounterVec { |
| 178 | return m.meter.MeasureSetCounterVec(name, m.labelKeys, opts...) |
| 179 | } |
| 180 | |
| 181 | // metricName composes meter prefix with instrument local name. |
| 182 | func metricName(prefix, name string) string { |
| 183 | if prefix == "" { |
| 184 | return name |
| 185 | } |
| 186 | if name == "" { |
| 187 | return prefix |
| 188 | } |
| 189 | return prefix + "." + name |
| 190 | } |