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marshaller.go
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marshaller.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package fileexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/fileexporter"
import (
"errors"
"fmt"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/pdata/plog"
"go.opentelemetry.io/collector/pdata/pmetric"
"go.opentelemetry.io/collector/pdata/ptrace"
)
// Marshaler configuration used for marhsaling Protobuf
var tracesMarshalers = map[string]ptrace.Marshaler{
formatTypeJSON: &ptrace.JSONMarshaler{},
formatTypeProto: &ptrace.ProtoMarshaler{},
}
var metricsMarshalers = map[string]pmetric.Marshaler{
formatTypeJSON: &pmetric.JSONMarshaler{},
formatTypeProto: &pmetric.ProtoMarshaler{},
}
var logsMarshalers = map[string]plog.Marshaler{
formatTypeJSON: &plog.JSONMarshaler{},
formatTypeProto: &plog.ProtoMarshaler{},
}
type marshaller struct {
tracesMarshaler ptrace.Marshaler
metricsMarshaler pmetric.Marshaler
logsMarshaler plog.Marshaler
compression string
compressor compressFunc
formatType string
}
func newMarshaller(conf *Config, host component.Host) (*marshaller, error) {
if conf.Encoding != nil {
encoding := host.GetExtensions()[*conf.Encoding]
if encoding == nil {
return nil, fmt.Errorf("unknown encoding %q", conf.Encoding)
}
// cast with ok to avoid panics.
tm, _ := encoding.(ptrace.Marshaler)
pm, _ := encoding.(pmetric.Marshaler)
lm, _ := encoding.(plog.Marshaler)
return &marshaller{
tracesMarshaler: tm,
metricsMarshaler: pm,
logsMarshaler: lm,
compression: conf.Compression,
compressor: buildCompressor(conf.Compression),
}, nil
}
return &marshaller{
formatType: conf.FormatType,
tracesMarshaler: tracesMarshalers[conf.FormatType],
metricsMarshaler: metricsMarshalers[conf.FormatType],
logsMarshaler: logsMarshalers[conf.FormatType],
compression: conf.Compression,
compressor: buildCompressor(conf.Compression),
}, nil
}
func (m *marshaller) marshalTraces(td ptrace.Traces) ([]byte, error) {
if m.metricsMarshaler == nil {
return nil, errors.New("traces are not supported by encoding")
}
buf, err := m.tracesMarshaler.MarshalTraces(td)
if err != nil {
return nil, err
}
buf = m.compressor(buf)
return buf, nil
}
func (m *marshaller) marshalMetrics(md pmetric.Metrics) ([]byte, error) {
if m.metricsMarshaler == nil {
return nil, errors.New("metrics are not supported by encoding")
}
buf, err := m.metricsMarshaler.MarshalMetrics(md)
if err != nil {
return nil, err
}
buf = m.compressor(buf)
return buf, nil
}
func (m *marshaller) marshalLogs(ld plog.Logs) ([]byte, error) {
if m.metricsMarshaler == nil {
return nil, errors.New("logs are not supported by encoding")
}
buf, err := m.logsMarshaler.MarshalLogs(ld)
if err != nil {
return nil, err
}
buf = m.compressor(buf)
return buf, nil
}