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filtermetric.go
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filtermetric.go
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// Copyright The 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.
package filtermetric // import "github.com/yubo/opentelemetry-collector/internal/coreinternal/processor/filtermetric"
import (
"go.opentelemetry.io/collector/model/pdata"
"go.uber.org/zap"
)
type Matcher interface {
MatchMetric(metric pdata.Metric) (bool, error)
}
// NewMatcher constructs a metric Matcher. If an 'expr' match type is specified,
// returns an expr matcher, otherwise a name matcher.
func NewMatcher(config *MatchProperties) (Matcher, error) {
if config == nil {
return nil, nil
}
if config.MatchType == Expr {
return newExprMatcher(config.Expressions)
}
return newNameMatcher(config)
}
// Filters have the ability to include and exclude metrics based on the metric's properties.
// The default is to not skip. If include is defined, the metric must match or it will be skipped.
// If include is not defined but exclude is, metric will be skipped if it matches exclude. Metric
// is included if neither specified.
func SkipMetric(include, exclude Matcher, metric pdata.Metric, logger *zap.Logger) bool {
if include != nil {
// A false (or an error) returned in this case means the metric should not be processed.
i, err := include.MatchMetric(metric)
if !i || err != nil {
logger.Debug("Skipping metric",
zap.String("metric_name", (metric.Name())),
zap.Error(err)) // zap.Error handles case where err is nil
return true
}
}
if exclude != nil {
// A true (or an error) returned in this case means the metric should not be processed.
e, err := exclude.MatchMetric(metric)
if e || err != nil {
logger.Debug("Skipping metric",
zap.String("metric_name", (metric.Name())),
zap.Error(err)) // zap.Error handles case where err is nil
return true
}
}
return false
}