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// Copyright 2022 The OpenZipkin 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 log implements a reporter to send spans in V2 JSON format to the Go
standard Logger.
*/
package log
import (
"encoding/json"
"log"
"os"
"time"
"github.com/openzipkin/zipkin-go/model"
"github.com/openzipkin/zipkin-go/reporter"
)
// logReporter will send spans to the default Go Logger.
type logReporter struct {
logger *log.Logger
}
// NewReporter returns a new log reporter.
func NewReporter(l *log.Logger) reporter.Reporter {
if l == nil {
// use standard type of log setup
l = log.New(os.Stderr, "", log.LstdFlags)
}
return &logReporter{
logger: l,
}
}
// Send outputs a span to the Go logger.
func (r *logReporter) Send(s model.SpanModel) {
if b, err := json.MarshalIndent(s, "", " "); err == nil {
r.logger.Printf("%s:\n%s\n\n", time.Now(), string(b))
}
}
// Close closes the reporter
func (*logReporter) Close() error { return nil }
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