/
factory.go
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/
factory.go
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// Copyright observIQ, Inc.
//
// 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 pluginreceiver
import (
"context"
"errors"
"fmt"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/exporter"
"go.opentelemetry.io/collector/receiver"
)
// componentType is the value of the "type" key in configuration.
var componentType = component.MustNewType("plugin")
const (
stability = component.StabilityLevelBeta
)
// Config is the configuration of a plugin receiver
type Config struct {
Path string `mapstructure:"path"`
Parameters map[string]any `mapstructure:"parameters"`
}
// createDefaultConfig creates a default config for a plugin receiver
func createDefaultConfig() component.Config {
return &Config{
Parameters: make(map[string]any),
}
}
// NewFactory creates a factory for a plugin receiver
func NewFactory() receiver.Factory {
return receiver.NewFactory(componentType,
createDefaultConfig,
receiver.WithLogs(createLogsReceiver, stability),
receiver.WithMetrics(createMetricsReceiver, stability),
receiver.WithTraces(createTracesReceiver, stability),
)
}
// createLogsReceiver creates a plugin receiver with a logs consumer
func createLogsReceiver(_ context.Context, set receiver.CreateSettings, cfg component.Config, consumer consumer.Logs) (receiver.Logs, error) {
emitterFactory := createLogEmitterFactory(consumer)
return createReceiver(cfg, set, emitterFactory)
}
// createMetricsReceiver creates a plugin receiver with a metrics consumer
func createMetricsReceiver(_ context.Context, set receiver.CreateSettings, cfg component.Config, consumer consumer.Metrics) (receiver.Metrics, error) {
emitterFactory := createMetricEmitterFactory(consumer)
return createReceiver(cfg, set, emitterFactory)
}
// createTracesReceiver creates a plugin receiver with a traces consumer
func createTracesReceiver(_ context.Context, set receiver.CreateSettings, cfg component.Config, consumer consumer.Traces) (receiver.Traces, error) {
emitterFactory := createTraceEmitterFactory(consumer)
return createReceiver(cfg, set, emitterFactory)
}
// createReceiver creates a plugin receiver with the supplied emitter
func createReceiver(cfg component.Config, set receiver.CreateSettings, emitterFactory exporter.Factory) (*Receiver, error) {
receiverConfig, ok := cfg.(*Config)
if !ok {
return nil, errors.New("config is not a plugin receiver config")
}
plugin, err := LoadPlugin(receiverConfig.Path)
if err != nil {
return nil, fmt.Errorf("failed to load plugin: %w", err)
}
if err := plugin.CheckParameters(receiverConfig.Parameters); err != nil {
return nil, fmt.Errorf("invalid plugin parameter: %w", err)
}
renderedCfg, err := plugin.Render(receiverConfig.Parameters, set.ID)
if err != nil {
return nil, fmt.Errorf("failed to render plugin: %w", err)
}
return NewReceiver(plugin, renderedCfg, emitterFactory, set.Logger), nil
}