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aggregate_attributes_processor.go
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/
aggregate_attributes_processor.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package sumologicprocessor // import "github.com/open-telemetry/opentelemetry-collector-contrib/processor/sumologicprocessor"
import (
"fmt"
"strings"
"go.opentelemetry.io/collector/pdata/pcommon"
"go.opentelemetry.io/collector/pdata/plog"
"go.opentelemetry.io/collector/pdata/pmetric"
"go.opentelemetry.io/collector/pdata/ptrace"
)
// aggregateAttributesProcessor
type aggregateAttributesProcessor struct {
aggregations []*aggregation
}
type aggregation struct {
attribute string
prefixes []string
}
func newAggregateAttributesProcessor(config []aggregationPair) *aggregateAttributesProcessor {
aggregations := []*aggregation{}
for i := 0; i < len(config); i++ {
pair := &aggregation{
attribute: config[i].Attribute,
prefixes: config[i].Prefixes,
}
aggregations = append(aggregations, pair)
}
return &aggregateAttributesProcessor{aggregations: aggregations}
}
func (proc *aggregateAttributesProcessor) processLogs(logs plog.Logs) error {
for i := 0; i < logs.ResourceLogs().Len(); i++ {
resourceLogs := logs.ResourceLogs().At(i)
err := proc.processAttributes(resourceLogs.Resource().Attributes())
if err != nil {
return err
}
for j := 0; j < resourceLogs.ScopeLogs().Len(); j++ {
scopeLogs := resourceLogs.ScopeLogs().At(j)
for k := 0; k < scopeLogs.LogRecords().Len(); k++ {
err := proc.processAttributes(scopeLogs.LogRecords().At(k).Attributes())
if err != nil {
return err
}
}
}
}
return nil
}
func (proc *aggregateAttributesProcessor) processMetrics(metrics pmetric.Metrics) error {
for i := 0; i < metrics.ResourceMetrics().Len(); i++ {
resourceMetrics := metrics.ResourceMetrics().At(i)
err := proc.processAttributes(resourceMetrics.Resource().Attributes())
if err != nil {
return err
}
for j := 0; j < resourceMetrics.ScopeMetrics().Len(); j++ {
scopeMetrics := resourceMetrics.ScopeMetrics().At(j)
for k := 0; k < scopeMetrics.Metrics().Len(); k++ {
err := processMetricLevelAttributes(proc, scopeMetrics.Metrics().At(k))
if err != nil {
return err
}
}
}
}
return nil
}
func (proc *aggregateAttributesProcessor) processTraces(traces ptrace.Traces) error {
for i := 0; i < traces.ResourceSpans().Len(); i++ {
resourceSpans := traces.ResourceSpans().At(i)
err := proc.processAttributes(resourceSpans.Resource().Attributes())
if err != nil {
return err
}
for j := 0; j < resourceSpans.ScopeSpans().Len(); j++ {
scopeSpans := resourceSpans.ScopeSpans().At(j)
for k := 0; k < scopeSpans.Spans().Len(); k++ {
err := proc.processAttributes(scopeSpans.Spans().At(k).Attributes())
if err != nil {
return err
}
}
}
}
return nil
}
func (proc *aggregateAttributesProcessor) isEnabled() bool {
return len(proc.aggregations) != 0
}
func (*aggregateAttributesProcessor) ConfigPropertyName() string {
return "aggregate_attributes"
}
func (proc *aggregateAttributesProcessor) processAttributes(attributes pcommon.Map) error {
for i := 0; i < len(proc.aggregations); i++ {
curr := proc.aggregations[i]
names := []string{}
attrs := []pcommon.Value{}
for j := 0; j < len(curr.prefixes); j++ {
prefix := curr.prefixes[j]
// Create a new map. Unused keys will be added here,
// so we can check them against other prefixes.
newMap := pcommon.NewMap()
newMap.EnsureCapacity(attributes.Len())
attributes.Range(func(key string, value pcommon.Value) bool {
ok, trimmedKey := getNewKey(key, prefix)
if ok {
// TODO: Potential name conflict to resolve, eg.:
// pod_* matches pod_foo
// pod2_* matches pod2_foo
// both will be renamed to foo
// ref: https://github.com/SumoLogic/sumologic-otel-collector/issues/1263
names = append(names, trimmedKey)
val := pcommon.NewValueEmpty()
value.CopyTo(val)
attrs = append(attrs, val)
} else {
value.CopyTo(newMap.PutEmpty(key))
}
return true
})
newMap.CopyTo(attributes)
}
if len(names) != len(attrs) {
return fmt.Errorf(
"internal error: number of values does not equal the number of keys; len(keys) = %d, len(values) = %d",
len(names),
len(attrs),
)
}
// Add a new attribute only if there's anything that should be put under it.
if len(names) > 0 {
aggregated := attributes.PutEmptyMap(curr.attribute)
for j := 0; j < len(names); j++ {
attrs[j].CopyTo(aggregated.PutEmpty(names[j]))
}
}
}
return nil
}
// Checks if the key has given prefix and trims it if so.
func getNewKey(key string, prefix string) (bool, string) {
if strings.HasPrefix(key, prefix) {
return true, strings.TrimPrefix(key, prefix)
}
return false, ""
}