mirror of
https://gitee.com/milvus-io/milvus.git
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138 lines
3.5 KiB
Go
138 lines
3.5 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 (
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"context"
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"fmt"
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"strings"
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"sync"
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"time"
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"github.com/milvus-io/milvus/internal/util/etcd"
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clientv3 "go.etcd.io/etcd/client/v3"
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)
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const (
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ReadConfigTimeout = 3 * time.Second
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)
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type EtcdSource struct {
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sync.RWMutex
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etcdCli *clientv3.Client
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ctx context.Context
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currentConfig map[string]string
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keyPrefix string
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configRefresher *refresher
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eh EventHandler
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}
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func NewEtcdSource(etcdInfo *EtcdInfo) (*EtcdSource, error) {
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etcdCli, err := etcd.GetEtcdClient(
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etcdInfo.UseEmbed,
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etcdInfo.UseSSL,
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etcdInfo.Endpoints,
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etcdInfo.CertFile,
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etcdInfo.KeyFile,
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etcdInfo.CaCertFile,
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etcdInfo.MinVersion)
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if err != nil {
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return nil, err
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}
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es := &EtcdSource{
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etcdCli: etcdCli,
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ctx: context.Background(),
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currentConfig: make(map[string]string),
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keyPrefix: etcdInfo.KeyPrefix,
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}
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es.configRefresher = newRefresher(etcdInfo.RefreshInterval, es.refreshConfigurations)
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return es, nil
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}
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// GetConfigurationByKey implements ConfigSource
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func (es *EtcdSource) GetConfigurationByKey(key string) (string, error) {
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es.RLock()
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v, ok := es.currentConfig[key]
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es.RUnlock()
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if !ok {
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return "", fmt.Errorf("key not found: %s", key)
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}
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return v, nil
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}
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// GetConfigurations implements ConfigSource
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func (es *EtcdSource) GetConfigurations() (map[string]string, error) {
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configMap := make(map[string]string)
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err := es.refreshConfigurations()
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if err != nil {
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return nil, err
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}
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es.configRefresher.start(es.GetSourceName())
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es.RLock()
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for key, value := range es.currentConfig {
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configMap[key] = value
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}
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es.RUnlock()
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return configMap, nil
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}
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// GetPriority implements ConfigSource
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func (es *EtcdSource) GetPriority() int {
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return HighPriority
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}
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// GetSourceName implements ConfigSource
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func (es *EtcdSource) GetSourceName() string {
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return "EtcdSource"
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}
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func (es *EtcdSource) Close() {
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es.etcdCli.Close()
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es.configRefresher.stop()
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}
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func (es *EtcdSource) SetEventHandler(eh EventHandler) {
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es.configRefresher.eh = eh
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}
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func (es *EtcdSource) refreshConfigurations() error {
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prefix := es.keyPrefix + "/config"
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ctx, cancel := context.WithTimeout(es.ctx, ReadConfigTimeout)
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defer cancel()
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response, err := es.etcdCli.Get(ctx, prefix, clientv3.WithPrefix())
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if err != nil {
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return err
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}
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newConfig := make(map[string]string, len(response.Kvs))
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for _, kv := range response.Kvs {
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key := string(kv.Key)
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key = strings.TrimPrefix(key, prefix+"/")
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newConfig[key] = string(kv.Value)
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newConfig[formatKey(key)] = string(kv.Value)
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}
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es.Lock()
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defer es.Unlock()
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err = es.configRefresher.fireEvents(es.GetSourceName(), es.currentConfig, newConfig)
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if err != nil {
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return err
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}
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es.currentConfig = newConfig
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return nil
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}
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