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kafka_receiver.go
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kafka_receiver.go
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// Copyright (c) 2020 The Jaeger 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 kafkareceiver
import (
"context"
"github.com/uber/jaeger-lib/metrics"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/obsreport"
jaegertranslator "go.opentelemetry.io/collector/translator/trace/jaeger"
"go.uber.org/zap"
"github.com/jaegertracing/jaeger/cmd/ingester/app/builder"
ingester "github.com/jaegertracing/jaeger/cmd/ingester/app/consumer"
"github.com/jaegertracing/jaeger/model"
"github.com/jaegertracing/jaeger/storage/spanstore"
)
func new(
config *Config,
nextConsumer consumer.TraceConsumer,
params component.ReceiverCreateParams,
) (component.TraceReceiver, error) {
ctx := obsreport.ReceiverContext(
context.Background(), config.Name(), "kafka", "kafka")
ctx = obsreport.StartTraceDataReceiveOp(
ctx, TypeStr, "kafka")
w := &writer{
ctx: ctx,
nextConsumer: nextConsumer,
}
consumer, err := builder.CreateConsumer(
params.Logger,
metrics.NullFactory,
w,
config.Options)
if err != nil {
return nil, err
}
return &kafkaReceiver{
consumer: consumer,
logger: params.Logger,
}, nil
}
type kafkaReceiver struct {
logger *zap.Logger
consumer *ingester.Consumer
}
var _ component.Receiver = (*kafkaReceiver)(nil)
// Start starts the receiver.
func (r kafkaReceiver) Start(_ context.Context, _ component.Host) error {
r.consumer.Start()
return nil
}
// Shutdown shutdowns the receiver.
func (r kafkaReceiver) Shutdown(_ context.Context) error {
return r.consumer.Close()
}
type writer struct {
nextConsumer consumer.TraceConsumer
ctx context.Context
}
var _ spanstore.Writer = (*writer)(nil)
// WriteSpan writes a span to the next consumer.
func (w writer) WriteSpan(span *model.Span) error {
batch := model.Batch{
Spans: []*model.Span{span},
Process: span.Process,
}
traces := jaegertranslator.ProtoBatchToInternalTraces(batch)
return w.nextConsumer.ConsumeTraces(w.ctx, traces)
}