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receiver.go
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receiver.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:https://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 azureeventhubreceiver // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/azureeventhubreceiver"
import (
"context"
"errors"
"fmt"
eventhub "github.com/Azure/azure-event-hubs-go/v3"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/obsreport"
"go.opentelemetry.io/collector/pdata/plog"
"go.opentelemetry.io/collector/pdata/pmetric"
"go.opentelemetry.io/collector/receiver"
"go.uber.org/zap"
"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/azureeventhubreceiver/internal/metadata"
)
type dataConsumer interface {
consume(ctx context.Context, event *eventhub.Event) error
setNextLogsConsumer(nextLogsConsumer consumer.Logs)
setNextMetricsConsumer(nextLogsConsumer consumer.Metrics)
}
type eventLogsUnmarshaler interface {
UnmarshalLogs(event *eventhub.Event) (plog.Logs, error)
}
type eventMetricsUnmarshaler interface {
UnmarshalMetrics(event *eventhub.Event) (pmetric.Metrics, error)
}
type eventhubReceiver struct {
eventHandler eventHandler
dataType component.Type
logger *zap.Logger
logsUnmarshaler eventLogsUnmarshaler
metricsUnmarshaler eventMetricsUnmarshaler
nextLogsConsumer consumer.Logs
nextMetricsConsumer consumer.Metrics
obsrecv *obsreport.Receiver
}
func (receiver *eventhubReceiver) Start(ctx context.Context, host component.Host) error {
err := receiver.eventHandler.run(ctx, host)
return err
}
func (receiver *eventhubReceiver) Shutdown(ctx context.Context) error {
return receiver.eventHandler.close(ctx)
}
func (receiver *eventhubReceiver) setNextLogsConsumer(nextLogsConsumer consumer.Logs) {
receiver.nextLogsConsumer = nextLogsConsumer
}
func (receiver *eventhubReceiver) setNextMetricsConsumer(nextMetricsConsumer consumer.Metrics) {
receiver.nextMetricsConsumer = nextMetricsConsumer
}
func (receiver *eventhubReceiver) consume(ctx context.Context, event *eventhub.Event) error {
switch receiver.dataType {
case component.DataTypeLogs:
return receiver.consumeLogs(ctx, event)
case component.DataTypeMetrics:
return receiver.consumeMetrics(ctx, event)
default:
return fmt.Errorf("invalid data type: %v", receiver.dataType)
}
}
func (receiver *eventhubReceiver) consumeLogs(ctx context.Context, event *eventhub.Event) error {
if receiver.nextLogsConsumer == nil {
return nil
}
if receiver.logsUnmarshaler == nil {
return errors.New("unable to unmarshal logs with configured format")
}
logsContext := receiver.obsrecv.StartLogsOp(ctx)
logs, err := receiver.logsUnmarshaler.UnmarshalLogs(event)
if err != nil {
return fmt.Errorf("failed to unmarshal logs: %w", err)
}
receiver.logger.Debug("Log Records", zap.Any("logs", logs))
err = receiver.nextLogsConsumer.ConsumeLogs(logsContext, logs)
receiver.obsrecv.EndLogsOp(logsContext, metadata.Type, 1, err)
return err
}
func (receiver *eventhubReceiver) consumeMetrics(ctx context.Context, event *eventhub.Event) error {
if receiver.nextMetricsConsumer == nil {
return nil
}
if receiver.metricsUnmarshaler == nil {
return errors.New("unable to unmarshal metrics with configured format")
}
metricsContext := receiver.obsrecv.StartMetricsOp(ctx)
metrics, err := receiver.metricsUnmarshaler.UnmarshalMetrics(event)
if err != nil {
return fmt.Errorf("failed to unmarshal metrics: %w", err)
}
receiver.logger.Debug("Metric Records", zap.Any("metrics", metrics))
err = receiver.nextMetricsConsumer.ConsumeMetrics(metricsContext, metrics)
receiver.obsrecv.EndMetricsOp(metricsContext, metadata.Type, 1, err)
return err
}
func newReceiver(
receiverType component.Type,
logsUnmarshaler eventLogsUnmarshaler,
metricsUnmarshaler eventMetricsUnmarshaler,
eventHandler eventHandler,
settings receiver.CreateSettings,
) (component.Component, error) {
obsrecv, err := obsreport.NewReceiver(obsreport.ReceiverSettings{
ReceiverID: settings.ID,
Transport: "event",
ReceiverCreateSettings: settings,
})
if err != nil {
return nil, err
}
eventhubReceiver := &eventhubReceiver{
dataType: receiverType,
eventHandler: eventHandler,
logger: settings.Logger,
logsUnmarshaler: logsUnmarshaler,
metricsUnmarshaler: metricsUnmarshaler,
obsrecv: obsrecv,
}
eventHandler.setDataConsumer(eventhubReceiver)
return eventhubReceiver, nil
}