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option.go
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option.go
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// Copyright (C) 2019-2022 vdaas.org vald team <vald@vdaas.org>
//
// 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
//
// 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 observability
import (
"github.com/vdaas/vald/internal/errgroup"
"github.com/vdaas/vald/internal/errors"
"github.com/vdaas/vald/internal/observability/exporter"
"github.com/vdaas/vald/internal/observability/metrics"
"github.com/vdaas/vald/internal/observability/trace"
)
type Option func(*observability) error
var defaultOpts = []Option{
WithErrGroup(errgroup.Get()),
}
// WithErrGroup returns an option that sets the errgroup.
func WithErrGroup(eg errgroup.Group) Option {
return func(o *observability) error {
if eg == nil {
return errors.NewErrInvalidOption("errgroup", eg)
}
o.eg = eg
return nil
}
}
// WithMetrics returns an option that sets the metrics.
func WithMetrics(ms ...metrics.Metric) Option {
return func(o *observability) error {
if len(ms) != 0 {
if o.metrics == nil {
o.metrics = ms
} else {
o.metrics = append(o.metrics, ms...)
}
}
return nil
}
}
// WithExporters returns an option that sets the exporters.
func WithExporters(exps ...exporter.Exporter) Option {
return func(o *observability) error {
if len(exps) != 0 {
if o.exporters == nil {
o.exporters = exps
} else {
o.exporters = append(o.exporters, exps...)
}
}
return nil
}
}
// WithTracer returns an option that sets the tracer.
func WithTracer(tr trace.Tracer) Option {
return func(o *observability) error {
if tr == nil {
return errors.NewErrInvalidOption("tracer", tr)
}
o.tracer = tr
return nil
}
}