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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,181 @@ | ||
| // Copyright 2021 Layotto Authors | ||
| // Licensed 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 in_memory | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "sync" | ||
|
|
||
| "mosn.io/layotto/components/configstores" | ||
| "mosn.io/layotto/components/pkg/actuators" | ||
| "mosn.io/layotto/components/trace" | ||
| ) | ||
|
|
||
| var ( | ||
| once sync.Once | ||
| readinessIndicator *actuators.HealthIndicator | ||
| livenessIndicator *actuators.HealthIndicator | ||
| ) | ||
|
|
||
| const ( | ||
| componentName = "configstore-memory" | ||
| defaultGroup = "default" | ||
| defaultLabel = "default" | ||
| ) | ||
|
|
||
| func init() { | ||
| readinessIndicator = actuators.NewHealthIndicator() | ||
| livenessIndicator = actuators.NewHealthIndicator() | ||
| } | ||
|
|
||
| type InMemoryConfigStore struct { | ||
| data *sync.Map | ||
| listener *sync.Map | ||
| storeName string | ||
| appId string | ||
| } | ||
|
|
||
| func NewStore() configstores.Store { | ||
| once.Do(func() { | ||
| indicators := &actuators.ComponentsIndicator{ReadinessIndicator: readinessIndicator, LivenessIndicator: livenessIndicator} | ||
| actuators.SetComponentsIndicator(componentName, indicators) | ||
| }) | ||
| return &InMemoryConfigStore{ | ||
| data: &sync.Map{}, | ||
| listener: &sync.Map{}, | ||
| } | ||
| } | ||
|
|
||
| func (m *InMemoryConfigStore) Init(config *configstores.StoreConfig) error { | ||
| m.appId = config.AppId | ||
| m.storeName = config.StoreName | ||
| readinessIndicator.SetStarted() | ||
| livenessIndicator.SetStarted() | ||
| return nil | ||
| } | ||
|
|
||
| // Get gets configuration from configuration store. | ||
| func (m *InMemoryConfigStore) Get(ctx context.Context, req *configstores.GetRequest) ([]*configstores.ConfigurationItem, error) { | ||
|
|
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| res := make([]*configstores.ConfigurationItem, 0, len(req.Keys)) | ||
|
|
||
| for _, key := range req.Keys { | ||
| value, ok := m.data.Load(key) | ||
| if ok { | ||
| config := &configstores.ConfigurationItem{ | ||
| Content: value.(string), | ||
| Key: key, | ||
| Group: req.Group, | ||
| } | ||
| res = append(res, config) | ||
| } | ||
| } | ||
| trace.SetExtraComponentInfo(ctx, fmt.Sprintf("method: %+v, store: %+v", "Get", "memory")) | ||
| return res, nil | ||
| } | ||
|
|
||
| // Set saves configuration into configuration store. | ||
| func (m *InMemoryConfigStore) Set(ctx context.Context, req *configstores.SetRequest) error { | ||
| if len(req.Items) == 0 { | ||
| return fmt.Errorf("params illegal:item is empty") | ||
| } | ||
| for _, item := range req.Items { | ||
| m.data.Store(item.Key, item.Content) | ||
| m.notifyChanged(item) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // Delete deletes configuration from configuration store. | ||
| func (m *InMemoryConfigStore) Delete(ctx context.Context, req *configstores.DeleteRequest) error { | ||
| for _, key := range req.Keys { | ||
| m.data.Delete(key) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // Subscribe gets configuration from configuration store and subscribe the updates. | ||
| func (m *InMemoryConfigStore) Subscribe(request *configstores.SubscribeReq, ch chan *configstores.SubscribeResp) error { | ||
| if request.Group == "" && len(request.Keys) > 0 { | ||
| request.Group = defaultGroup | ||
| } | ||
|
|
||
| ctx := context.Background() | ||
| req := &configstores.GetRequest{ | ||
| AppId: request.AppId, | ||
| Group: request.Group, | ||
| Label: request.Label, | ||
| Keys: request.Keys, | ||
| Metadata: request.Metadata, | ||
| } | ||
|
|
||
| for _, key := range req.Keys { | ||
| m.listener.Store(key, m.subscribeOnChange(ch)) | ||
| } | ||
|
|
||
| items, err := m.Get(ctx, req) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
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| for _, item := range items { | ||
| m.notifyChanged(item) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
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| func (m *InMemoryConfigStore) notifyChanged(item *configstores.ConfigurationItem) { | ||
| f, ok := m.listener.Load(item.Key) | ||
| if ok { | ||
| f.(OnChangeFunc)(item.Group, item.Key, item.Content) | ||
| } | ||
| } | ||
|
|
||
| type OnChangeFunc func(group, dataId, data string) | ||
|
|
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| func (m *InMemoryConfigStore) subscribeOnChange(ch chan *configstores.SubscribeResp) OnChangeFunc { | ||
| return func(group, dataId, data string) { | ||
| resp := &configstores.SubscribeResp{ | ||
| StoreName: m.storeName, | ||
| AppId: m.appId, | ||
| Items: []*configstores.ConfigurationItem{ | ||
| { | ||
| Key: dataId, | ||
| Content: data, | ||
| Group: group, | ||
| }, | ||
| }, | ||
| } | ||
|
|
||
| ch <- resp | ||
| } | ||
| } | ||
|
|
||
| func (m *InMemoryConfigStore) StopSubscribe() { | ||
| // stop listening all subscribed configs | ||
| m.listener.Range(func(key, value any) bool { | ||
| m.listener.Delete(key) | ||
| return true | ||
| }) | ||
| } | ||
|
|
||
| func (m *InMemoryConfigStore) GetDefaultGroup() string { | ||
| return defaultGroup | ||
| } | ||
|
|
||
| func (m *InMemoryConfigStore) GetDefaultLabel() string { | ||
| return defaultLabel | ||
| } |
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