youtubebeat/vendor/github.com/elastic/beats/filebeat/input/registry.go

65 lines
2.1 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 input
import (
"fmt"
"github.com/elastic/beats/filebeat/channel"
"github.com/elastic/beats/filebeat/input/file"
"github.com/elastic/beats/libbeat/common"
"github.com/elastic/beats/libbeat/logp"
)
type Context struct {
States []file.State
Done chan struct{}
BeatDone chan struct{}
DynamicFields *common.MapStrPointer
Meta map[string]string
}
// Factory is used to register functions creating new Input instances.
type Factory = func(config *common.Config, connector channel.Connector, context Context) (Input, error)
var registry = make(map[string]Factory)
func Register(name string, factory Factory) error {
logp.Info("Registering input factory")
if name == "" {
return fmt.Errorf("Error registering input: name cannot be empty")
}
if factory == nil {
return fmt.Errorf("Error registering input '%v': factory cannot be empty", name)
}
if _, exists := registry[name]; exists {
return fmt.Errorf("Error registering input '%v': already registered", name)
}
registry[name] = factory
logp.Info("Successfully registered input")
return nil
}
func GetFactory(name string) (Factory, error) {
if _, exists := registry[name]; !exists {
return nil, fmt.Errorf("Error creating input. No such input type exist: '%v'", name)
}
return registry[name], nil
}