/
factory.go
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/
factory.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://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 opencensusreceiver
import (
"context"
"go.uber.org/zap"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/config/configgrpc"
"go.opentelemetry.io/collector/config/configmodels"
"go.opentelemetry.io/collector/config/confignet"
"go.opentelemetry.io/collector/consumer"
)
const (
// The value of "type" key in configuration.
typeStr = "opencensus"
)
// Factory is the Factory for receiver.
type Factory struct {
}
// Type gets the type of the ocReceiver config created by this Factory.
func (f *Factory) Type() configmodels.Type {
return typeStr
}
// CreateDefaultConfig creates the default configuration for receiver.
func (f *Factory) CreateDefaultConfig() configmodels.Receiver {
return &Config{
ReceiverSettings: configmodels.ReceiverSettings{
TypeVal: typeStr,
NameVal: typeStr,
},
GRPCServerSettings: configgrpc.GRPCServerSettings{
NetAddr: confignet.NetAddr{
Endpoint: "0.0.0.0:55678",
Transport: "tcp",
},
// We almost write 0 bytes, so no need to tune WriteBufferSize.
ReadBufferSize: 512 * 1024,
},
}
}
// CreateTraceReceiver creates a trace receiver based on provided config.
func (f *Factory) CreateTraceReceiver(
_ context.Context,
_ *zap.Logger,
cfg configmodels.Receiver,
nextConsumer consumer.TraceConsumerOld,
) (component.TraceReceiver, error) {
r, err := f.createReceiver(cfg)
if err != nil {
return nil, err
}
r.traceConsumer = nextConsumer
return r, nil
}
// CreateMetricsReceiver creates a metrics receiver based on provided config.
func (f *Factory) CreateMetricsReceiver(_ context.Context, _ *zap.Logger, cfg configmodels.Receiver, nextConsumer consumer.MetricsConsumerOld) (component.MetricsReceiver, error) {
r, err := f.createReceiver(cfg)
if err != nil {
return nil, err
}
r.metricsConsumer = nextConsumer
return r, nil
}
func (f *Factory) createReceiver(cfg configmodels.Receiver) (*ocReceiver, error) {
rCfg := cfg.(*Config)
// There must be one receiver for both metrics and traces. We maintain a map of
// receivers per config.
// Check to see if there is already a receiver for this config.
receiver, ok := receivers[rCfg]
if !ok {
// Build the configuration options.
opts, err := rCfg.buildOptions()
if err != nil {
return nil, err
}
// We don't have a receiver, so create one.
receiver, err = newOpenCensusReceiver(
rCfg.Name(), rCfg.NetAddr.Transport, rCfg.NetAddr.Endpoint, nil, nil, opts...)
if err != nil {
return nil, err
}
// Remember the receiver in the map
receivers[rCfg] = receiver
}
return receiver, nil
}
// This is the map of already created OpenCensus receivers for particular configurations.
// We maintain this map because the Factory is asked trace and metric receivers separately
// when it gets CreateTraceReceiver() and CreateMetricsReceiver() but they must not
// create separate objects, they must use one ocReceiver object per configuration.
var receivers = map[*Config]*ocReceiver{}