// Copyright 2013 The Prometheus 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 retrieval

import (
	"time"

	clientmodel "github.com/prometheus/client_golang/model"
)

type nopAppender struct{}

func (a nopAppender) Append(*clientmodel.Sample) {
}

type slowAppender struct{}

func (a slowAppender) Append(*clientmodel.Sample) {
	time.Sleep(time.Millisecond)
	return
}

type collectResultAppender struct {
	result clientmodel.Samples
}

func (a *collectResultAppender) Append(s *clientmodel.Sample) {
	a.result = append(a.result, s)
}