prometheus/retrieval/discovery/marathon/client.go

48 lines
1.3 KiB
Go

// Copyright 2015 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 marathon
import (
"encoding/json"
"io/ioutil"
"net/http"
)
// AppListClient defines a function that can be used to get an application list from marathon.
type AppListClient func(url string) (*AppList, error)
// FetchMarathonApps requests a list of applications from a marathon server.
func FetchMarathonApps(url string) (*AppList, error) {
resp, err := http.Get(url)
if err != nil {
return nil, err
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
return parseAppJSON(body)
}
func parseAppJSON(body []byte) (*AppList, error) {
apps := &AppList{}
err := json.Unmarshal(body, apps)
if err != nil {
return nil, err
}
return apps, nil
}