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112 lines
2.8 KiB
Go
112 lines
2.8 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. 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, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package config
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import "time"
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const (
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HighPriority = 1
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NormalPriority = HighPriority + 10
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LowPriority = NormalPriority + 10
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)
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type Source interface {
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GetConfigurations() (map[string]string, error)
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GetConfigurationByKey(string) (string, error)
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GetPriority() int
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GetSourceName() string
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SetEventHandler(eh EventHandler)
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UpdateOptions(opt Options)
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Close()
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}
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// EtcdInfo has attribute for config center source initialization
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type EtcdInfo struct {
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UseEmbed bool
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UseSSL bool
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Endpoints []string
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KeyPrefix string
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CertFile string
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KeyFile string
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CaCertFile string
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MinVersion string
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// Pull Configuration interval, unit is second
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RefreshInterval time.Duration
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}
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// FileInfo has attribute for file source
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type FileInfo struct {
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Files []string
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RefreshInterval time.Duration
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}
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// Options hold options
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type Options struct {
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FileInfo *FileInfo
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EtcdInfo *EtcdInfo
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EnvKeyFormatter func(string) string
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}
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// Option is a func
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type Option func(options *Options)
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// WithRequiredFiles tell archaius to manage files, if not exist will return error
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func WithFilesSource(fi *FileInfo) Option {
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return func(options *Options) {
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options.FileInfo = fi
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}
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}
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// WithEtcdSource accept the information for initiating a remote source
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func WithEtcdSource(ri *EtcdInfo) Option {
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return func(options *Options) {
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options.EtcdInfo = ri
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}
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}
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// WithEnvSource enable env source
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// archaius will read ENV as key value
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func WithEnvSource(keyFormatter func(string) string) Option {
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return func(options *Options) {
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options.EnvKeyFormatter = keyFormatter
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}
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}
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// EventHandler handles config change event
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type EventHandler interface {
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OnEvent(event *Event)
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GetIdentifier() string
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}
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type simpleHandler struct {
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identity string
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onEvent func(*Event)
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}
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func (s *simpleHandler) GetIdentifier() string {
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return s.identity
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}
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// OnEvent implements EventHandler
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func (s *simpleHandler) OnEvent(event *Event) {
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s.onEvent(event)
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}
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func NewHandler(ident string, onEvent func(*Event)) EventHandler {
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return &simpleHandler{ident, onEvent}
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}
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