/
factory.go
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/
factory.go
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// Copyright 2019, 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 processor
import (
"fmt"
"go.uber.org/zap"
"github.com/open-telemetry/opentelemetry-service/config/configmodels"
"github.com/open-telemetry/opentelemetry-service/consumer"
)
// Factory is factory interface for processors.
type Factory interface {
// Type gets the type of the Processor created by this factory.
Type() string
// CreateDefaultConfig creates the default configuration for the Processor.
CreateDefaultConfig() configmodels.Processor
// CreateTraceProcessor creates a trace processor based on this config.
// If the processor type does not support tracing or if the config is not valid
// error will be returned instead.
CreateTraceProcessor(logger *zap.Logger, nextConsumer consumer.TraceConsumer,
cfg configmodels.Processor) (TraceProcessor, error)
// CreateMetricsProcessor creates a metrics processor based on this config.
// If the processor type does not support metrics or if the config is not valid
// error will be returned instead.
CreateMetricsProcessor(logger *zap.Logger, nextConsumer consumer.MetricsConsumer,
cfg configmodels.Processor) (MetricsProcessor, error)
}
// Build takes a list of processor factories and returns a map of type map[string]Factory
// with factory type as keys. It returns a non-nil error when more than one factories
// have the same type.
func Build(factories ...Factory) (map[string]Factory, error) {
fMap := map[string]Factory{}
for _, f := range factories {
if _, ok := fMap[f.Type()]; ok {
return fMap, fmt.Errorf("duplicate processor factory %q", f.Type())
}
fMap[f.Type()] = f
}
return fMap, nil
}