87 lines
2.7 KiB
Go
87 lines
2.7 KiB
Go
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// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package management
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import (
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"github.com/gofrs/uuid"
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"github.com/elastic/beats/libbeat/common"
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"github.com/elastic/beats/libbeat/common/reload"
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"github.com/elastic/beats/libbeat/feature"
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)
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// Namespace is the feature namespace for queue definition.
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var Namespace = "libbeat.management"
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// DebugK used as key for all things central management
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var DebugK = "centralmgmt"
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// ConfigManager interacts with the beat to update configurations
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// from an external source
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type ConfigManager interface {
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// Enabled returns true if config manager is enabled
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Enabled() bool
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// Start the config manager
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Start()
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// Stop the config manager
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Stop()
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// CheckRawConfig check settings are correct before launching the beat
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CheckRawConfig(cfg *common.Config) error
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}
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// FactoryFunc for creating a config manager
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type FactoryFunc func(*common.Config, *reload.Registry, uuid.UUID) (ConfigManager, error)
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// Register a config manager
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func Register(name string, fn FactoryFunc, stability feature.Stability) {
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f := feature.New(Namespace, name, fn, feature.NewDetails(name, "", stability))
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feature.MustRegister(f)
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}
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// Factory retrieves config manager constructor. If no one is registered
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// it will create a nil manager
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func Factory() FactoryFunc {
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factories, err := feature.GlobalRegistry().LookupAll(Namespace)
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if err != nil {
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return nilFactory
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}
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for _, f := range factories {
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if factory, ok := f.Factory().(FactoryFunc); ok {
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return factory
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}
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}
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return nilFactory
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}
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// nilManager, fallback when no manager is present
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type nilManager struct{}
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func nilFactory(*common.Config, *reload.Registry, uuid.UUID) (ConfigManager, error) {
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return nilManager{}, nil
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}
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func (nilManager) Enabled() bool { return false }
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func (nilManager) Start() {}
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func (nilManager) Stop() {}
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func (nilManager) CheckRawConfig(cfg *common.Config) error { return nil }
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