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factory.go
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factory.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 enmsAnalyticsExporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/fileexporter"
import (
"context"
"io"
"os"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/exporter"
"go.opentelemetry.io/collector/exporter/exporterhelper"
"gopkg.in/natefinch/lumberjack.v2"
)
const (
// The value of "type" key in configuration.
typeStr = "file"
// The stability level of the exporter.
stability = component.StabilityLevelAlpha
// the number of old log files to retain
defaultMaxBackups = 100
// the format of encoded telemetry data
formatTypeJSON = "json"
formatTypeProto = "proto"
// the type of compression codec
compressionZSTD = "zstd"
)
// NewFactory creates a factory for OTLP exporter.
func NewFactory() exporter.Factory {
return exporter.NewFactory(
typeStr,
createDefaultConfig,
exporter.WithTraces(createTracesExporter, stability),
exporter.WithMetrics(createMetricsExporter, stability),
exporter.WithLogs(createLogsExporter, stability))
}
func createDefaultConfig() component.Config {
return &Config{
FormatType: formatTypeJSON,
Rotation: &Rotation{MaxBackups: defaultMaxBackups},
}
}
func createTracesExporter(
ctx context.Context,
set exporter.CreateSettings,
cfg component.Config,
) (exporter.Traces, error) {
conf := cfg.(*Config)
writer, err := buildFileWriter(conf)
if err != nil {
return nil, err
}
fe := exporters.GetOrAdd(cfg, func() component.Component {
return newFileExporter(conf, writer)
})
return exporterhelper.NewTracesExporter(
ctx,
set,
cfg,
fe.Unwrap().(*enmsAnalyticsExporter).ConsumeTraces,
exporterhelper.WithStart(fe.Start),
exporterhelper.WithShutdown(fe.Shutdown),
)
}
func createMetricsExporter(
ctx context.Context,
set exporter.CreateSettings,
cfg component.Config,
) (exporter.Metrics, error) {
conf := cfg.(*Config)
writer, err := buildFileWriter(conf)
if err != nil {
return nil, err
}
fe := exporters.GetOrAdd(cfg, func() component.Component {
return newFileExporter(conf, writer)
})
return exporterhelper.NewMetricsExporter(
ctx,
set,
cfg,
fe.Unwrap().(*enmsAnalyticsExporter).ConsumeMetrics,
exporterhelper.WithStart(fe.Start),
exporterhelper.WithShutdown(fe.Shutdown),
)
}
func createLogsExporter(
ctx context.Context,
set exporter.CreateSettings,
cfg component.Config,
) (exporter.Logs, error) {
conf := cfg.(*Config)
writer, err := buildFileWriter(conf)
if err != nil {
return nil, err
}
fe := exporters.GetOrAdd(cfg, func() component.Component {
return newFileExporter(conf, writer)
})
return exporterhelper.NewLogsExporter(
ctx,
set,
cfg,
fe.Unwrap().(*enmsAnalyticsExporter).ConsumeLogs,
exporterhelper.WithStart(fe.Start),
exporterhelper.WithShutdown(fe.Shutdown),
)
}
func newFileExporter(conf *Config, writer io.WriteCloser) *enmsAnalyticsExporter {
return &enmsAnalyticsExporter{
path: conf.Path,
formatType: conf.FormatType,
file: writer,
tracesMarshaler: tracesMarshalers[conf.FormatType],
metricsMarshaler: metricsMarshalers[conf.FormatType],
logsMarshaler: logsMarshalers[conf.FormatType],
exporter: buildExportFunc(conf),
compression: conf.Compression,
compressor: buildCompressor(conf.Compression),
}
}
func buildFileWriter(cfg *Config) (io.WriteCloser, error) {
if cfg.Rotation == nil {
return os.OpenFile(cfg.Path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
}
return &lumberjack.Logger{
Filename: cfg.Path,
MaxSize: cfg.Rotation.MaxMegabytes,
MaxAge: cfg.Rotation.MaxDays,
MaxBackups: cfg.Rotation.MaxBackups,
LocalTime: cfg.Rotation.LocalTime,
}, nil
}
// This is the map of already created File exporters for particular configurations.
// We maintain this map because the Factory is asked trace and metric receivers separately
// when it gets CreateTracesReceiver() and CreateMetricsReceiver() but they must not
// create separate objects, they must use one Receiver object per configuration.
var exporters = NewSharedComponents()