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optimizer.go
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/
optimizer.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 arrow
import (
"bytes"
"sort"
"go.opentelemetry.io/collector/pdata/pcommon"
"go.opentelemetry.io/collector/pdata/plog"
"github.com/open-telemetry/otel-arrow/pkg/otel/common/otlp"
)
type (
LogsOptimizer struct {
sorter LogSorter
}
LogsOptimized struct {
Logs []*FlattenedLog
}
ResScope struct {
// Resource log section.
ResourceLogsID int
Resource pcommon.Resource
ResourceSchemaUrl string
// Scope log section.
ScopeLogsID int
Scope pcommon.InstrumentationScope
ScopeSchemaUrl string
}
FlattenedLog struct {
ResScope *ResScope
Log plog.LogRecord
}
LogSorter interface {
Sort(logs []*FlattenedLog)
}
LogsByNothing struct{}
LogsByResourceLogsIDScopeLogsIDTraceID struct{}
)
func NewLogsOptimizer(sorter LogSorter) *LogsOptimizer {
return &LogsOptimizer{
sorter: sorter,
}
}
func (t *LogsOptimizer) Optimize(logs plog.Logs) *LogsOptimized {
logsOptimized := &LogsOptimized{
Logs: make([]*FlattenedLog, 0, 32),
}
resLogsIDs := make(map[string]int)
scopeLogsIDs := make(map[string]int)
resLogsSlice := logs.ResourceLogs()
for i := 0; i < resLogsSlice.Len(); i++ {
resLogs := resLogsSlice.At(i)
resource := resLogs.Resource()
resourceSchemaUrl := resLogs.SchemaUrl()
ID := otlp.ResourceID(resource, resourceSchemaUrl)
resLogsID, found := resLogsIDs[ID]
if !found {
resLogsID = len(resLogsIDs)
resLogsIDs[ID] = resLogsID
}
scopeLogs := resLogs.ScopeLogs()
for j := 0; j < scopeLogs.Len(); j++ {
scopeSpan := scopeLogs.At(j)
scope := scopeSpan.Scope()
scopeSchemaUrl := scopeSpan.SchemaUrl()
ID = otlp.ScopeID(scope, scopeSchemaUrl)
scopeLogsID, found := scopeLogsIDs[ID]
if !found {
scopeLogsID = len(scopeLogsIDs)
scopeLogsIDs[ID] = scopeLogsID
}
resScope := &ResScope{
ResourceLogsID: resLogsID,
Resource: resource,
ResourceSchemaUrl: resourceSchemaUrl,
ScopeLogsID: scopeLogsID,
Scope: scope,
ScopeSchemaUrl: scopeSchemaUrl,
}
logRecords := scopeSpan.LogRecords()
for k := 0; k < logRecords.Len(); k++ {
logsOptimized.Logs = append(logsOptimized.Logs, &FlattenedLog{
ResScope: resScope,
Log: logRecords.At(k),
})
}
}
}
t.sorter.Sort(logsOptimized.Logs)
return logsOptimized
}
// No sorting
// ==========
func UnsortedLogs() *LogsByNothing {
return &LogsByNothing{}
}
func (s *LogsByNothing) Sort(_ []*FlattenedLog) {
}
// Sort logs by resource logs ID, scope logs ID, and trace ID.
func SortLogsByResourceLogsIDScopeLogsIDTraceID() *LogsByResourceLogsIDScopeLogsIDTraceID {
return &LogsByResourceLogsIDScopeLogsIDTraceID{}
}
func (s *LogsByResourceLogsIDScopeLogsIDTraceID) Sort(logs []*FlattenedLog) {
sort.Slice(logs, func(i, j int) bool {
logI := logs[i]
logJ := logs[j]
if logI.ResScope.ResourceLogsID == logJ.ResScope.ResourceLogsID {
if logI.ResScope.ScopeLogsID == logJ.ResScope.ScopeLogsID {
traceIdI := logI.Log.TraceID()
traceIdJ := logJ.Log.TraceID()
return bytes.Compare(traceIdI[:], traceIdJ[:]) == -1
} else {
return logI.ResScope.ScopeLogsID < logJ.ResScope.ScopeLogsID
}
} else {
return logI.ResScope.ResourceLogsID < logJ.ResScope.ResourceLogsID
}
})
}