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factory.go
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factory.go
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// Copyright 2020, 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 receivercreator
import (
"context"
"fmt"
"github.com/open-telemetry/opentelemetry-collector/component"
"github.com/open-telemetry/opentelemetry-collector/config/configerror"
"github.com/open-telemetry/opentelemetry-collector/config/configmodels"
"github.com/open-telemetry/opentelemetry-collector/consumer"
"github.com/spf13/viper"
"go.uber.org/zap"
)
// This file implements factory for receiver_creator. A receiver_creator can create other receivers at runtime.
const (
typeStr = "receiver_creator"
)
// Factory is the factory for receiver_creator.
type Factory struct {
}
var _ component.ReceiverFactoryOld = (*Factory)(nil)
// Type gets the type of the Receiver config created by this factory.
func (f *Factory) Type() configmodels.Type {
return configmodels.Type(typeStr)
}
// CustomUnmarshaler returns custom unmarshaler for receiver_creator config.
func (f *Factory) CustomUnmarshaler() component.CustomUnmarshaler {
return func(sourceViperSection *viper.Viper, intoCfg interface{}) error {
if sourceViperSection == nil {
// Nothing to do if there is no config given.
return nil
}
c := intoCfg.(*Config)
if err := sourceViperSection.Unmarshal(&c); err != nil {
return err
}
receiversCfg := viperSub(sourceViperSection, receiversConfigKey)
for subreceiverKey := range receiversCfg.AllSettings() {
cfgSection := viperSub(receiversCfg, subreceiverKey).GetStringMap(configKey)
subreceiver, err := newReceiverTemplate(subreceiverKey, cfgSection)
if err != nil {
return err
}
// Unmarshals receiver_creator configuration like rule.
if err = receiversCfg.UnmarshalKey(subreceiverKey, &subreceiver); err != nil {
return fmt.Errorf("failed to deserialize sub-receiver %q: %s", subreceiverKey, err)
}
subreceiver.rule, err = newRule(subreceiver.Rule)
if err != nil {
return fmt.Errorf("subreceiver %q rule is invalid: %v", subreceiverKey, err)
}
c.receiverTemplates[subreceiverKey] = subreceiver
}
return nil
}
}
// CreateDefaultConfig creates the default configuration for receiver_creator.
func (f *Factory) CreateDefaultConfig() configmodels.Receiver {
return &Config{
ReceiverSettings: configmodels.ReceiverSettings{
TypeVal: configmodels.Type(typeStr),
NameVal: typeStr,
},
receiverTemplates: map[string]receiverTemplate{},
}
}
// CreateTraceReceiver creates a trace receiver based on provided config.
func (f *Factory) CreateTraceReceiver(context.Context, *zap.Logger, configmodels.Receiver,
consumer.TraceConsumerOld) (component.TraceReceiver, error) {
return nil, configerror.ErrDataTypeIsNotSupported
}
// CreateMetricsReceiver creates a metrics receiver based on provided config.
func (f *Factory) CreateMetricsReceiver(
logger *zap.Logger,
cfg configmodels.Receiver,
consumer consumer.MetricsConsumerOld,
) (component.MetricsReceiver, error) {
return newReceiverCreator(logger, consumer, cfg.(*Config))
}