forked from open-telemetry/opentelemetry-collector-contrib
/
logshelper.go
119 lines (100 loc) · 3.12 KB
/
logshelper.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 exporterhelper
import (
"context"
"go.uber.org/zap"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/config/configmodels"
"go.opentelemetry.io/collector/config/configtelemetry"
"go.opentelemetry.io/collector/consumer/consumererror"
"go.opentelemetry.io/collector/consumer/pdata"
"go.opentelemetry.io/collector/obsreport"
)
// PushLogs is a helper function that is similar to ConsumeLogs but also returns
// the number of dropped logs.
type PushLogs func(ctx context.Context, md pdata.Logs) error
type logsRequest struct {
baseRequest
ld pdata.Logs
pusher PushLogs
}
func newLogsRequest(ctx context.Context, ld pdata.Logs, pusher PushLogs) request {
return &logsRequest{
baseRequest: baseRequest{ctx: ctx},
ld: ld,
pusher: pusher,
}
}
func (req *logsRequest) onError(err error) request {
var logError consumererror.Logs
if consumererror.AsLogs(err, &logError) {
return newLogsRequest(req.ctx, logError.GetLogs(), req.pusher)
}
return req
}
func (req *logsRequest) export(ctx context.Context) error {
return req.pusher(ctx, req.ld)
}
func (req *logsRequest) count() int {
return req.ld.LogRecordCount()
}
type logsExporter struct {
*baseExporter
pusher PushLogs
}
func (lexp *logsExporter) ConsumeLogs(ctx context.Context, ld pdata.Logs) error {
return lexp.sender.send(newLogsRequest(ctx, ld, lexp.pusher))
}
// NewLogsExporter creates an LogsExporter that records observability metrics and wraps every request with a Span.
func NewLogsExporter(
cfg configmodels.Exporter,
logger *zap.Logger,
pusher PushLogs,
options ...Option,
) (component.LogsExporter, error) {
if cfg == nil {
return nil, errNilConfig
}
if logger == nil {
return nil, errNilLogger
}
if pusher == nil {
return nil, errNilPushLogsData
}
be := newBaseExporter(cfg, logger, options...)
be.wrapConsumerSender(func(nextSender requestSender) requestSender {
return &logsExporterWithObservability{
obsrep: obsreport.NewExporter(obsreport.ExporterSettings{
Level: configtelemetry.GetMetricsLevelFlagValue(),
ExporterName: cfg.Name(),
}),
nextSender: nextSender,
}
})
return &logsExporter{
baseExporter: be,
pusher: pusher,
}, nil
}
type logsExporterWithObservability struct {
obsrep *obsreport.Exporter
nextSender requestSender
}
func (lewo *logsExporterWithObservability) send(req request) error {
req.setContext(lewo.obsrep.StartLogsExportOp(req.context()))
err := lewo.nextSender.send(req)
lewo.obsrep.EndLogsExportOp(req.context(), req.count(), err)
return err
}