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add redis pub/sub mechanism for replica sync (#3924)
* add redis pub/sub mechanism for replica sync Signed-off-by: Min Min <[email protected]> * fix panic Signed-off-by: Min Min <[email protected]> * add debug logs Signed-off-by: Min Min <[email protected]> * improve logs Signed-off-by: Min Min <[email protected]> --------- Signed-off-by: Min Min <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| /* | ||
| Copyright 2025 The KodeRover 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 redis | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "sync" | ||
|
|
||
| "github.com/koderover/zadig/v2/pkg/config" | ||
| "github.com/koderover/zadig/v2/pkg/tool/log" | ||
| "github.com/koderover/zadig/v2/pkg/util" | ||
| "github.com/redis/go-redis/v9" | ||
| ) | ||
|
|
||
| type RedisEventBus struct { | ||
| redisClient *redis.Client | ||
| mu sync.RWMutex | ||
| handleFuncs map[string][]func(message string) | ||
| } | ||
|
|
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| var redisClient *redis.Client | ||
| var handleFuncMap map[string][]func(message string) | ||
|
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| func New(db int) *RedisEventBus { | ||
| if redisClient == nil { | ||
| redisConfig := &redis.Options{ | ||
| Addr: fmt.Sprintf("%s:%d", config.RedisHost(), config.RedisPort()), | ||
| DB: db, | ||
| } | ||
|
|
||
| if config.RedisUserName() != "" { | ||
| redisConfig.Username = config.RedisUserName() | ||
| } | ||
| if config.RedisPassword() != "" { | ||
| redisConfig.Password = config.RedisPassword() | ||
| } | ||
| redisClient = redis.NewClient(redisConfig) | ||
| } | ||
|
|
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| if handleFuncMap == nil { | ||
| handleFuncMap = make(map[string][]func(message string)) | ||
| } | ||
|
|
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| return &RedisEventBus{redisClient: redisClient, handleFuncs: handleFuncMap} | ||
| } | ||
|
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| func (eb *RedisEventBus) RegisterHandleFunc(channel string, handleFunc func(message string)) { | ||
| eb.mu.Lock() | ||
| defer eb.mu.Unlock() | ||
|
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| if _, exists := eb.handleFuncs[channel]; !exists { | ||
| eb.handleFuncs[channel] = make([]func(string), 0) // Initialize if not already present | ||
| } | ||
| eb.handleFuncs[channel] = append(eb.handleFuncs[channel], handleFunc) | ||
| } | ||
|
|
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| func (eb *RedisEventBus) Subscribe(ctx context.Context, channel string) { | ||
| pubsub := eb.redisClient.Subscribe(ctx, channel) | ||
|
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| log.Infof("Subscribing to channel %s", channel) | ||
|
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| util.Go(func() { | ||
| defer pubsub.Close() | ||
|
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| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return | ||
| case msg := <-pubsub.Channel(): | ||
| log.Debugf("Redis Eventbus: [%s] MESSAGE IN: %s", channel, msg.Payload) | ||
|
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| eb.mu.RLock() | ||
| handlers := eb.handleFuncs[channel] | ||
| eb.mu.RUnlock() | ||
|
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| for _, f := range handlers { | ||
| go f(msg.Payload) | ||
| } | ||
| } | ||
| } | ||
| }) | ||
| } | ||
|
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||
| func (eb *RedisEventBus) Publish(channel, message string) error { | ||
| return eb.redisClient.Publish(context.Background(), channel, message).Err() | ||
| } |