feat: config.
This commit is contained in:
Bobo
286
remoteconfig/apollo/apollo.go
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286
remoteconfig/apollo/apollo.go
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@@ -0,0 +1,286 @@
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package apollo
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import (
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"github.com/apolloconfig/agollo/v4"
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"strings"
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"github.com/apolloconfig/agollo/v4/constant"
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apolloconfig "github.com/apolloconfig/agollo/v4/env/config"
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"github.com/apolloconfig/agollo/v4/extension"
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"github.com/go-kratos/kratos/v2/config"
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"github.com/go-kratos/kratos/v2/encoding"
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"github.com/go-kratos/kratos/v2/log"
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)
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type apollo struct {
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client agollo.Client
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opt *options
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}
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const (
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yaml = "yaml"
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yml = "yml"
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json = "json"
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properties = "properties"
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)
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var formats map[string]struct{}
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// Option is apollo option
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type Option func(*options)
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type options struct {
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appid string
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secret string
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cluster string
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endpoint string
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namespace string
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isBackupConfig bool
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backupPath string
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originConfig bool
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}
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// WithAppID with apollo config app id
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func WithAppID(appID string) Option {
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return func(o *options) {
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o.appid = appID
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}
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}
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// WithCluster with apollo config cluster
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func WithCluster(cluster string) Option {
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return func(o *options) {
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o.cluster = cluster
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}
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}
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// WithEndpoint with apollo config conf server ip
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func WithEndpoint(endpoint string) Option {
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return func(o *options) {
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o.endpoint = endpoint
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}
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}
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// WithEnableBackup with apollo config enable backup config
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func WithEnableBackup() Option {
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return func(o *options) {
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o.isBackupConfig = true
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}
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}
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// WithDisableBackup with apollo config enable backup config
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func WithDisableBackup() Option {
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return func(o *options) {
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o.isBackupConfig = false
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}
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}
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// WithSecret with apollo config app secret
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func WithSecret(secret string) Option {
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return func(o *options) {
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o.secret = secret
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}
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}
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// WithNamespace with apollo config namespace name
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func WithNamespace(name string) Option {
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return func(o *options) {
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o.namespace = name
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}
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}
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// WithBackupPath with apollo config backupPath
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func WithBackupPath(backupPath string) Option {
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return func(o *options) {
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o.backupPath = backupPath
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}
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}
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// WithOriginalConfig use the original configuration file without parse processing
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func WithOriginalConfig() Option {
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return func(o *options) {
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extension.AddFormatParser(constant.JSON, &jsonExtParser{})
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extension.AddFormatParser(constant.YAML, &yamlExtParser{})
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extension.AddFormatParser(constant.YML, &yamlExtParser{})
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o.originConfig = true
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}
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}
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func NewSource(opts ...Option) config.Source {
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op := options{}
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for _, o := range opts {
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o(&op)
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}
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client, err := agollo.StartWithConfig(func() (*apolloconfig.AppConfig, error) {
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return &apolloconfig.AppConfig{
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AppID: op.appid,
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Cluster: op.cluster,
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NamespaceName: op.namespace,
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IP: op.endpoint,
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IsBackupConfig: op.isBackupConfig,
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Secret: op.secret,
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BackupConfigPath: op.backupPath,
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}, nil
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})
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if err != nil {
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panic(err)
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}
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return &apollo{client: client, opt: &op}
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}
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func format(ns string) string {
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arr := strings.Split(ns, ".")
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suffix := arr[len(arr)-1]
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if len(arr) <= 1 || suffix == properties {
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return json
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}
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if _, ok := formats[suffix]; !ok {
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// fallback
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return json
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}
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return suffix
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}
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func (e *apollo) load() []*config.KeyValue {
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kvs := make([]*config.KeyValue, 0)
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namespaces := strings.Split(e.opt.namespace, ",")
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for _, ns := range namespaces {
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if !e.opt.originConfig {
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kv, err := e.getConfig(ns)
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if err != nil {
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log.Errorf("apollo get config failed，err:%v", err)
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continue
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}
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kvs = append(kvs, kv)
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continue
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}
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if strings.Contains(ns, ".") && !strings.HasSuffix(ns, "."+properties) &&
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(format(ns) == yaml || format(ns) == yml || format(ns) == json) {
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kv, err := e.getOriginConfig(ns)
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if err != nil {
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log.Errorf("apollo get config failed，err:%v", err)
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continue
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}
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kvs = append(kvs, kv)
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continue
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}
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kv, err := e.getConfig(ns)
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if err != nil {
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log.Errorf("apollo get config failed，err:%v", err)
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continue
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}
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kvs = append(kvs, kv)
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}
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return kvs
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}
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func (e *apollo) getConfig(ns string) (*config.KeyValue, error) {
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next := map[string]any{}
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e.client.GetConfigCache(ns).Range(func(key, value any) bool {
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// all values are out properties format
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resolve(genKey(ns, key.(string)), value, next)
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return true
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})
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f := format(ns)
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codec := encoding.GetCodec(f)
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val, err := codec.Marshal(next)
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if err != nil {
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return nil, err
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}
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return &config.KeyValue{
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Key: ns,
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Value: val,
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Format: f,
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}, nil
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}
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func (e apollo) getOriginConfig(ns string) (*config.KeyValue, error) {
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value, err := e.client.GetConfigCache(ns).Get("content")
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if err != nil {
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return nil, err
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}
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// serialize the namespace content KeyValue into bytes.
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return &config.KeyValue{
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Key: ns,
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Value: []byte(value.(string)),
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Format: format(ns),
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}, nil
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}
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func (e *apollo) Load() (kv []*config.KeyValue, err error) {
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return e.load(), nil
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}
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func (e *apollo) Watch() (config.Watcher, error) {
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w, err := newWatcher(e)
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if err != nil {
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return nil, err
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}
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return w, nil
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}
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// resolve convert kv pair into one map[string]interface{} by split key into different
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// map level. such as: app.name = "application" => map[app][name] = "application"
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func resolve(key string, value any, target map[string]any) {
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// expand key "aaa.bbb" into map[aaa]map[bbb]interface{}
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keys := strings.Split(key, ".")
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last := len(keys) - 1
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cursor := target
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for i, k := range keys {
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if i == last {
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cursor[k] = value
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break
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}
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// not the last key, be deeper
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v, ok := cursor[k]
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if !ok {
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// create a new map
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deeper := make(map[string]any)
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cursor[k] = deeper
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cursor = deeper
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continue
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}
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// current exists, then check existing value type, if it's not map
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// that means duplicate keys, and at least one is not map instance.
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if cursor, ok = v.(map[string]any); !ok {
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log.Warnf("duplicate key: %v\n", strings.Join(keys[:i+1], "."))
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break
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}
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}
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}
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// genKey got the key of config.KeyValue pair.
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// eg: namespace.ext with subKey got namespace.subKey
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func genKey(ns, sub string) string {
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arr := strings.Split(ns, ".")
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if len(arr) == 1 {
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if ns == "" {
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return sub
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}
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return ns + "." + sub
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}
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suffix := arr[len(arr)-1]
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_, ok := formats[suffix]
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if ok {
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return strings.Join(arr[:len(arr)-1], ".") + "." + sub
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}
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return ns + "." + sub
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}
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func init() {
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formats = make(map[string]struct{})
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formats[yaml] = struct{}{}
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formats[yml] = struct{}{}
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formats[json] = struct{}{}
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formats[properties] = struct{}{}
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}
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