logging_exporter.go

// Copyright 2019, OpenCensus 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 loggingexporter

import (
"context"

"github.com/census-instrumentation/opencensus-service/data"
"github.com/census-instrumentation/opencensus-service/exporter"
"github.com/census-instrumentation/opencensus-service/exporter/exporterhelper"
"go.uber.org/zap"
)

const (
traceExportFormat="logging_trace"
metricsExportFormat="logging_metrics"
)

// NewTraceExporter creates an exporter.TraceExporter that just drops the
// received data and logs debugging messages.
funcNewTraceExporter(logger*zap.Logger) (exporter.TraceExporter, error) {
returnexporterhelper.NewTraceExporter(
traceExportFormat,
func(ctx context.Context, td data.TraceData) (int, error) {
logger.Debug("loggingTraceExporter", zap.Int("#spans", len(td.Spans)))
// TODO: Add ability to record the received data
return0, nil
 },
exporterhelper.WithSpanName("LoggingExporter.ConsumeTraceData"), exporterhelper.WithRecordMetrics(true),
 )
}

// NewMetricsExporter creates an exporter.MetricsExporter that just drops the
// received data and logs debugging messages.
funcNewMetricsExporter(logger*zap.Logger) (exporter.MetricsExporter, error) {
returnexporterhelper.NewMetricsExporter(
metricsExportFormat,
func(ctx context.Context, md data.MetricsData) (int, error) {
logger.Debug("loggingMetricsExporter", zap.Int("#metrics", len(md.Metrics)))
// TODO: Add ability to record the received data
return0, nil
 },
exporterhelper.WithSpanName("LoggingExporter.ConsumeMetricsData"), exporterhelper.WithRecordMetrics(true),
 )
}