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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 awsxrayreceiver // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsxrayreceiver"
import (
"context"
"fmt"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/obsreport"
"go.opentelemetry.io/collector/receiver"
"go.uber.org/multierr"
"go.uber.org/zap"
"github.com/open-telemetry/opentelemetry-collector-contrib/internal/aws/proxy"
awsxray "github.com/open-telemetry/opentelemetry-collector-contrib/internal/aws/xray"
"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsxrayreceiver/internal/translator"
"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsxrayreceiver/internal/udppoller"
)
const (
// number of goroutines polling the UDP socket.
// https://github.com/aws/aws-xray-daemon/blob/master/pkg/cfg/cfg.go#L184
maxPollerCount = 2
)
// xrayReceiver implements the receiver.Traces interface for converting
// AWS X-Ray segment document into the OT internal trace format.
type xrayReceiver struct {
poller udppoller.Poller
server proxy.Server
settings receiver.CreateSettings
consumer consumer.Traces
obsrecv *obsreport.Receiver
}
func newReceiver(config *Config,
consumer consumer.Traces,
set receiver.CreateSettings) (receiver.Traces, error) {
if consumer == nil {
return nil, component.ErrNilNextConsumer
}
set.Logger.Info("Going to listen on endpoint for X-Ray segments",
zap.String(udppoller.Transport, config.Endpoint))
poller, err := udppoller.New(&udppoller.Config{
Transport: config.Transport,
Endpoint: config.Endpoint,
NumOfPollerToStart: maxPollerCount,
}, set)
if err != nil {
return nil, err
}
set.Logger.Info("Listening on endpoint for X-Ray segments",
zap.String(udppoller.Transport, config.Endpoint))
srv, err := proxy.NewServer(config.ProxyServer, set.Logger)
if err != nil {
return nil, err
}
obsrecv, err := obsreport.NewReceiver(obsreport.ReceiverSettings{
ReceiverID: set.ID,
Transport: udppoller.Transport,
ReceiverCreateSettings: set,
})
if err != nil {
return nil, err
}
return &xrayReceiver{
poller: poller,
server: srv,
settings: set,
consumer: consumer,
obsrecv: obsrecv,
}, nil
}
func (x *xrayReceiver) Start(ctx context.Context, host component.Host) error {
// TODO: Might want to pass `host` into read() below to report a fatal error
x.poller.Start(ctx)
go x.start()
go func() {
_ = x.server.ListenAndServe()
}()
x.settings.Logger.Info("X-Ray TCP proxy server started")
return nil
}
func (x *xrayReceiver) Shutdown(ctx context.Context) error {
var err error
if pollerErr := x.poller.Close(); pollerErr != nil {
err = fmt.Errorf("failed to close poller: %w", pollerErr)
}
if proxyErr := x.server.Shutdown(ctx); proxyErr != nil {
err = multierr.Append(err, fmt.Errorf("failed to close proxy: %w", proxyErr))
}
return err
}
func (x *xrayReceiver) start() {
incomingSegments := x.poller.SegmentsChan()
for seg := range incomingSegments {
ctx := x.obsrecv.StartTracesOp(seg.Ctx)
traces, totalSpanCount, err := translator.ToTraces(seg.Payload)
if err != nil {
x.settings.Logger.Warn("X-Ray segment to OT traces conversion failed", zap.Error(err))
x.obsrecv.EndTracesOp(ctx, awsxray.TypeStr, totalSpanCount, err)
continue
}
err = x.consumer.ConsumeTraces(ctx, traces)
if err != nil {
x.settings.Logger.Warn("Trace consumer errored out", zap.Error(err))
x.obsrecv.EndTracesOp(ctx, awsxray.TypeStr, totalSpanCount, err)
continue
}
x.obsrecv.EndTracesOp(ctx, awsxray.TypeStr, totalSpanCount, nil)
}
}