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feat(circuitbreak): support config circuitbreak policy with xds (#29)
* feat(circuitbreak): support config circuitbreak policy with xds
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| /* | ||
| * Copyright 2024 CloudWeGo 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 xdssuite | ||
|
|
||
| import ( | ||
| "sync/atomic" | ||
|
|
||
| "github.com/cloudwego/kitex/client" | ||
| "github.com/cloudwego/kitex/pkg/circuitbreak" | ||
| "github.com/cloudwego/kitex/pkg/rpcinfo" | ||
| ) | ||
|
|
||
| type circuitBreaker struct { | ||
| lastPolicies atomic.Value | ||
| cb *circuitbreak.CBSuite | ||
| } | ||
|
|
||
| func (cb *circuitBreaker) updateAllCircuitConfigs(configs map[string]circuitbreak.CBConfig) { | ||
| if cb.cb == nil { | ||
| return | ||
| } | ||
| newPolicies := make(map[string]struct{}) | ||
| for k, v := range configs { | ||
| cb.cb.UpdateServiceCBConfig(k, v) | ||
| newPolicies[k] = struct{}{} | ||
| } | ||
|
|
||
| defer cb.lastPolicies.Store(newPolicies) | ||
|
|
||
| val := cb.lastPolicies.Load() | ||
| if val == nil { | ||
| return | ||
| } | ||
| lastPolicies, ok := val.(map[string]struct{}) | ||
| if !ok { | ||
| return | ||
| } | ||
| // disable the old policies that are not in the new configs. | ||
| for k := range lastPolicies { | ||
| if _, ok := newPolicies[k]; !ok { | ||
| cb.cb.UpdateServiceCBConfig(k, circuitbreak.CBConfig{ | ||
| Enable: false, | ||
| }) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // NewCircuitBreaker integrate xds config and kitex circuitbreaker | ||
| func NewCircuitBreaker() client.Option { | ||
| m := xdsResourceManager.getManager() | ||
| if m == nil { | ||
| panic("xds resource manager has not been initialized") | ||
| } | ||
|
|
||
| cb := &circuitBreaker{ | ||
| cb: circuitbreak.NewCBSuite(genServiceCBKey), | ||
| } | ||
| m.RegisterCircuitBreaker(cb.updateAllCircuitConfigs) | ||
| return client.WithCircuitBreaker(cb.cb) | ||
| } | ||
|
|
||
| // keep consistent when initialising the circuit breaker suit and updating | ||
| // the circuit breaker policy. | ||
| func genServiceCBKey(ri rpcinfo.RPCInfo) string { | ||
| if ri == nil { | ||
| return "" | ||
| } | ||
| // the value of RouterClusterKey is stored in route process. | ||
| key, _ := ri.To().Tag(RouterClusterKey) | ||
| return key | ||
| } |
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