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internal/stats: Add metrics recorder list and usage in ClientConn (#7428
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| /* | ||
| * Copyright 2024 gRPC 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. | ||
| */ | ||
|
|
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| package stats | ||
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| import ( | ||
| "fmt" | ||
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| estats "google.golang.org/grpc/experimental/stats" | ||
| "google.golang.org/grpc/stats" | ||
| ) | ||
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| // MetricsRecorderList forwards Record calls to all of its metricsRecorders. | ||
| // | ||
| // It eats any record calls where the label values provided do not match the | ||
| // number of label keys. | ||
| type MetricsRecorderList struct { | ||
| // metricsRecorders are the metrics recorders this list will forward to. | ||
| metricsRecorders []estats.MetricsRecorder | ||
| } | ||
|
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| // NewMetricsRecorderList creates a new metric recorder list with all the stats | ||
| // handlers provided which implement the MetricsRecorder interface. | ||
| // If no stats handlers provided implement the MetricsRecorder interface, | ||
| // the MetricsRecorder list returned is a no-op. | ||
| func NewMetricsRecorderList(shs []stats.Handler) *MetricsRecorderList { | ||
| var mrs []estats.MetricsRecorder | ||
| for _, sh := range shs { | ||
| if mr, ok := sh.(estats.MetricsRecorder); ok { | ||
| mrs = append(mrs, mr) | ||
| } | ||
| } | ||
| return &MetricsRecorderList{ | ||
| metricsRecorders: mrs, | ||
| } | ||
| } | ||
|
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| func verifyLabels(desc *estats.MetricDescriptor, labelsRecv ...string) { | ||
| if got, want := len(labelsRecv), len(desc.Labels)+len(desc.OptionalLabels); got != want { | ||
| panic(fmt.Sprintf("Received %d labels in call to record metric %q, but expected %d.", got, desc.Name, want)) | ||
| } | ||
| } | ||
|
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| func (l *MetricsRecorderList) RecordInt64Count(handle *estats.Int64CountHandle, incr int64, labels ...string) { | ||
| verifyLabels(handle.Descriptor(), labels...) | ||
|
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| for _, metricRecorder := range l.metricsRecorders { | ||
| metricRecorder.RecordInt64Count(handle, incr, labels...) | ||
| } | ||
| } | ||
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| func (l *MetricsRecorderList) RecordFloat64Count(handle *estats.Float64CountHandle, incr float64, labels ...string) { | ||
| verifyLabels(handle.Descriptor(), labels...) | ||
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| for _, metricRecorder := range l.metricsRecorders { | ||
| metricRecorder.RecordFloat64Count(handle, incr, labels...) | ||
| } | ||
| } | ||
|
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| func (l *MetricsRecorderList) RecordInt64Histo(handle *estats.Int64HistoHandle, incr int64, labels ...string) { | ||
| verifyLabels(handle.Descriptor(), labels...) | ||
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| for _, metricRecorder := range l.metricsRecorders { | ||
| metricRecorder.RecordInt64Histo(handle, incr, labels...) | ||
| } | ||
| } | ||
|
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| func (l *MetricsRecorderList) RecordFloat64Histo(handle *estats.Float64HistoHandle, incr float64, labels ...string) { | ||
| verifyLabels(handle.Descriptor(), labels...) | ||
|
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| for _, metricRecorder := range l.metricsRecorders { | ||
| metricRecorder.RecordFloat64Histo(handle, incr, labels...) | ||
| } | ||
| } | ||
|
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| func (l *MetricsRecorderList) RecordInt64Gauge(handle *estats.Int64GaugeHandle, incr int64, labels ...string) { | ||
| verifyLabels(handle.Descriptor(), labels...) | ||
|
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| for _, metricRecorder := range l.metricsRecorders { | ||
| metricRecorder.RecordInt64Gauge(handle, incr, labels...) | ||
| } | ||
| } |
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