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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: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 metricsgenerationprocessor // import "github.com/open-telemetry/opentelemetry-collector-contrib/processor/metricsgenerationprocessor"
import (
"context"
"fmt"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/config"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/processor/processorhelper"
)
const (
// The value of "type" key in configuration.
typeStr = "experimental_metricsgeneration"
)
var processorCapabilities = consumer.Capabilities{MutatesData: true}
// NewFactory returns a new factory for the Metrics Generation processor.
func NewFactory() component.ProcessorFactory {
return component.NewProcessorFactory(
typeStr,
createDefaultConfig,
component.WithMetricsProcessor(createMetricsProcessor))
}
func createDefaultConfig() config.Processor {
return &Config{
ProcessorSettings: config.NewProcessorSettings(config.NewComponentID(typeStr)),
}
}
func createMetricsProcessor(
ctx context.Context,
params component.ProcessorCreateSettings,
cfg config.Processor,
nextConsumer consumer.Metrics,
) (component.MetricsProcessor, error) {
processorConfig, ok := cfg.(*Config)
if !ok {
return nil, fmt.Errorf("configuration parsing error")
}
processorConfig.Validate()
metricsProcessor := newMetricsGenerationProcessor(buildInternalConfig(processorConfig), params.Logger)
return processorhelper.NewMetricsProcessor(
cfg,
nextConsumer,
metricsProcessor.processMetrics,
processorhelper.WithCapabilities(processorCapabilities))
}
// buildInternalConfig constructs the internal metric generation rules
func buildInternalConfig(config *Config) []internalRule {
internalRules := make([]internalRule, len(config.Rules))
for i, rule := range config.Rules {
customRule := internalRule{
name: rule.Name,
unit: rule.Unit,
ruleType: string(rule.Type),
metric1: rule.Metric1,
metric2: rule.Metric2,
operation: string(rule.Operation),
scaleBy: rule.ScaleBy,
}
internalRules[i] = customRule
}
return internalRules
}