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logs_batch.go
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logs_batch.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package exporterhelper // import "go.opentelemetry.io/collector/exporter/exporterhelper"
import (
"context"
"errors"
"go.opentelemetry.io/collector/exporter/exporterbatcher"
"go.opentelemetry.io/collector/pdata/plog"
)
// mergeLogs merges two logs requests into one.
func mergeLogs(_ context.Context, r1 Request, r2 Request) (Request, error) {
lr1, ok1 := r1.(*logsRequest)
lr2, ok2 := r2.(*logsRequest)
if !ok1 || !ok2 {
return nil, errors.New("invalid input type")
}
lr2.ld.ResourceLogs().MoveAndAppendTo(lr1.ld.ResourceLogs())
return lr1, nil
}
// mergeSplitLogs splits and/or merges the logs into multiple requests based on the MaxSizeConfig.
func mergeSplitLogs(_ context.Context, cfg exporterbatcher.MaxSizeConfig, r1 Request, r2 Request) ([]Request, error) {
var (
res []Request
destReq *logsRequest
capacityLeft = cfg.MaxSizeItems
)
for _, req := range []Request{r1, r2} {
if req == nil {
continue
}
srcReq, ok := req.(*logsRequest)
if !ok {
return nil, errors.New("invalid input type")
}
if srcReq.ld.LogRecordCount() <= capacityLeft {
if destReq == nil {
destReq = srcReq
} else {
srcReq.ld.ResourceLogs().MoveAndAppendTo(destReq.ld.ResourceLogs())
}
capacityLeft -= destReq.ld.LogRecordCount()
continue
}
for {
extractedLogs := extractLogs(srcReq.ld, capacityLeft)
if extractedLogs.LogRecordCount() == 0 {
break
}
capacityLeft -= extractedLogs.LogRecordCount()
if destReq == nil {
destReq = &logsRequest{ld: extractedLogs, pusher: srcReq.pusher}
} else {
extractedLogs.ResourceLogs().MoveAndAppendTo(destReq.ld.ResourceLogs())
}
// Create new batch once capacity is reached.
if capacityLeft == 0 {
res = append(res, destReq)
destReq = nil
capacityLeft = cfg.MaxSizeItems
}
}
}
if destReq != nil {
res = append(res, destReq)
}
return res, nil
}
// extractLogs extracts logs from the input logs and returns a new logs with the specified number of log records.
func extractLogs(srcLogs plog.Logs, count int) plog.Logs {
destLogs := plog.NewLogs()
srcLogs.ResourceLogs().RemoveIf(func(srcRL plog.ResourceLogs) bool {
if count == 0 {
return false
}
needToExtract := resourceLogsCount(srcRL) > count
if needToExtract {
srcRL = extractResourceLogs(srcRL, count)
}
count -= resourceLogsCount(srcRL)
srcRL.MoveTo(destLogs.ResourceLogs().AppendEmpty())
return !needToExtract
})
return destLogs
}
// extractResourceLogs extracts resource logs and returns a new resource logs with the specified number of log records.
func extractResourceLogs(srcRL plog.ResourceLogs, count int) plog.ResourceLogs {
destRL := plog.NewResourceLogs()
destRL.SetSchemaUrl(srcRL.SchemaUrl())
srcRL.Resource().CopyTo(destRL.Resource())
srcRL.ScopeLogs().RemoveIf(func(srcSL plog.ScopeLogs) bool {
if count == 0 {
return false
}
needToExtract := srcSL.LogRecords().Len() > count
if needToExtract {
srcSL = extractScopeLogs(srcSL, count)
}
count -= srcSL.LogRecords().Len()
srcSL.MoveTo(destRL.ScopeLogs().AppendEmpty())
return !needToExtract
})
return destRL
}
// extractScopeLogs extracts scope logs and returns a new scope logs with the specified number of log records.
func extractScopeLogs(srcSL plog.ScopeLogs, count int) plog.ScopeLogs {
destSL := plog.NewScopeLogs()
destSL.SetSchemaUrl(srcSL.SchemaUrl())
srcSL.Scope().CopyTo(destSL.Scope())
srcSL.LogRecords().RemoveIf(func(srcLR plog.LogRecord) bool {
if count == 0 {
return false
}
srcLR.MoveTo(destSL.LogRecords().AppendEmpty())
count--
return true
})
return destSL
}
// resourceLogsCount calculates the total number of log records in the plog.ResourceLogs.
func resourceLogsCount(rl plog.ResourceLogs) int {
count := 0
for k := 0; k < rl.ScopeLogs().Len(); k++ {
count += rl.ScopeLogs().At(k).LogRecords().Len()
}
return count
}