youtubebeat/vendor/github.com/elastic/beats/libbeat/outputs/hosts.go

52 lines
1.6 KiB
Go

// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 outputs
import "github.com/elastic/beats/libbeat/common"
// ReadHostList reads a list of hosts to connect to from an configuration
// object. If the `workers` settings is > 1, each host is duplicated in the final
// host list by the number of `workers`.
func ReadHostList(cfg *common.Config) ([]string, error) {
config := struct {
Hosts []string `config:"hosts" validate:"required"`
Worker int `config:"worker" validate:"min=1"`
}{
Worker: 1,
}
err := cfg.Unpack(&config)
if err != nil {
return nil, err
}
lst := config.Hosts
if len(lst) == 0 || config.Worker <= 1 {
return lst, nil
}
// duplicate entries config.Workers times
hosts := make([]string, 0, len(lst)*config.Worker)
for _, entry := range lst {
for i := 0; i < config.Worker; i++ {
hosts = append(hosts, entry)
}
}
return hosts, nil
}