/
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 spanprocessor
import (
"context"
"errors"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/config/configerror"
"go.opentelemetry.io/collector/config/configmodels"
"go.opentelemetry.io/collector/consumer"
)
const (
// typeStr is the value of "type" Span processor in the configuration.
typeStr = "span"
)
// errMissingRequiredField is returned when a required field in the config
// is not specified.
// TODO https://go.opentelemetry.io/collector/issues/215
// Move this to the error package that allows for span name and field to be specified.
var errMissingRequiredField = errors.New("error creating \"span\" processor: either \"from_attributes\" or \"to_attributes\" must be specified in \"name:\"")
// Factory is the factory for the Span processor.
type Factory struct {
}
var _ component.ProcessorFactory = (*Factory)(nil)
// Type gets the type of the config created by this factory.
func (f *Factory) Type() configmodels.Type {
return typeStr
}
// CreateDefaultConfig creates the default configuration for processor.
func (f *Factory) CreateDefaultConfig() configmodels.Processor {
return &Config{
ProcessorSettings: configmodels.ProcessorSettings{
TypeVal: typeStr,
NameVal: typeStr,
},
}
}
// CreateTraceProcessor creates a trace processor based on this config.
func (f *Factory) CreateTraceProcessor(
_ context.Context,
_ component.ProcessorCreateParams,
nextConsumer consumer.TraceConsumer,
cfg configmodels.Processor) (component.TraceProcessor, error) {
// 'from_attributes' or 'to_attributes' under 'name' has to be set for the span
// processor to be valid. If not set and not enforced, the processor would do no work.
oCfg := cfg.(*Config)
if len(oCfg.Rename.FromAttributes) == 0 &&
(oCfg.Rename.ToAttributes == nil || len(oCfg.Rename.ToAttributes.Rules) == 0) {
return nil, errMissingRequiredField
}
return newSpanProcessor(nextConsumer, *oCfg)
}
// CreateMetricsProcessor creates a metric processor based on this config.
func (f *Factory) CreateMetricsProcessor(
_ context.Context,
_ component.ProcessorCreateParams,
_ consumer.MetricsConsumer,
_ configmodels.Processor) (component.MetricsProcessor, error) {
// Span Processor does not support Metrics.
return nil, configerror.ErrDataTypeIsNotSupported
}