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/
stdout.go
81 lines (69 loc) · 2.17 KB
/
stdout.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 stdout
import (
"context"
"encoding/json"
"io"
"os"
"sync"
"go.uber.org/zap"
"github.com/open-telemetry/opentelemetry-log-collection/entry"
"github.com/open-telemetry/opentelemetry-log-collection/operator"
"github.com/open-telemetry/opentelemetry-log-collection/operator/helper"
)
// Stdout is a global handle to standard output
var Stdout io.Writer = os.Stdout
func init() {
operator.Register("stdout", func() operator.Builder { return NewStdoutConfig("") })
}
// NewStdoutConfig creates a new stdout config with default values
func NewStdoutConfig(operatorID string) *StdoutConfig {
return &StdoutConfig{
OutputConfig: helper.NewOutputConfig(operatorID, "stdout"),
}
}
// StdoutConfig is the configuration of the Stdout operator
type StdoutConfig struct {
helper.OutputConfig `yaml:",inline"`
}
// Build will build a stdout operator.
func (c StdoutConfig) Build(logger *zap.SugaredLogger) (operator.Operator, error) {
outputOperator, err := c.OutputConfig.Build(logger)
if err != nil {
return nil, err
}
return &StdoutOperator{
OutputOperator: outputOperator,
encoder: json.NewEncoder(Stdout),
}, nil
}
// StdoutOperator is an operator that logs entries using stdout.
type StdoutOperator struct {
helper.OutputOperator
encoder *json.Encoder
mux sync.Mutex
}
// Process will log entries received.
func (o *StdoutOperator) Process(ctx context.Context, entry *entry.Entry) error {
o.mux.Lock()
err := o.encoder.Encode(entry)
if err != nil {
o.mux.Unlock()
o.Errorf("Failed to process entry: %s, $s", err, entry.Body)
return err
}
o.mux.Unlock()
return nil
}