Feat(retry): support configure retry policy from nacos

.gitignore

@@ -27,4 +27,4 @@ output/*
 
 # Vscode files
 .vscode
-
+vendor

README.md

@@ -1 +1,71 @@
-# .github
+# config-nacos (*This is a community driven project*)
+
+[中文](https://github.com/kitex-contrib/config-nacos/blob/main/README_CN.md)
+
+Nacos as config centre.
+
+## How to use?
+
+### Basic
+
+#### Server
+
+TODO
+
+#### Client
+
+```go
+import (
+    // ...
+	"github.com/cloudwego/kitex-examples/kitex_gen/api/echo"
+	"github.com/cloudwego/kitex/client"
+	retry "github.com/kitex-contrib/config-nacos/client"
+	"github.com/kitex-contrib/config-nacos/nacos"
+    // ...
+)
+
+func main() {
+    // ... 
+	nacosClient, err := nacos.DefaultClient()
+	if err != nil {
+		panic(err)
+	}
+	fn := func(cp *vo.ConfigParam) {
+		cp.Type = vo.TEXT
+	}
+	opts := []client.Option{
+		client.WithHostPorts("0.0.0.0:8888"),
+		client.WithMiddleware(mymiddleware.CommonMiddleware),
+		client.WithMiddleware(mymiddleware.ClientMiddleware),
+		//client.WithResolver(r),
+	}
+
+	opts = append(opts, retry.NewSuite("echo", nacosClient, fn).Options()...)
+
+	client, err := echo.NewClient(
+		"echo",
+		opts...,
+	)
+    // ...
+}
+```
+
+### Environment Variable
+
+| Environment Variable Name | Environment Variable Default Value | Environment Variable Introduction |
+| ------------------------- | ---------------------------------- | --------------------------------- |
+| serverAddr                | 127.0.0.1                          | nacos server address              |
+| serverPort                | 8848                               | nacos server port                 |
+| namespace                 |                                    | the namespaceId of nacos          |
+| configDataId              | {{.ClientServiceName}}.{{.ServerServiceName}}.{{.Category}}  | the  format of config data id          |
+| configGroup               | DEFAULT_GROUP                      | the group of config data          |
+
+### More Info
+
+Refer to [example](example) for more usage.
+
+## Compatibility
+This Package use Nacos1.x client. The Nacos2.0 and Nacos1.0 Server are fully compatible with it. [see](https://nacos.io/en-us/docs/v2/upgrading/2.0.0-compatibility.html)
+
+maintained by: [whalecold](https://github.com/whalecold)
+

README_CN.md

@@ -0,0 +1,64 @@
+# config-nacos 
+
+[English](https://github.com/kitex-contrib/config-nacos/blob/main/README.md)
+
+使用 **nacos** 作为 **Kitex** 的配置中心
+
+##  这个项目应当如何使用?
+
+### 基本使用
+
+#### 客户端
+
+```go
+import (
+    // ...
+	"github.com/cloudwego/kitex-examples/kitex_gen/api/echo"
+	"github.com/cloudwego/kitex/client"
+	retry "github.com/kitex-contrib/config-nacos/client"
+	"github.com/kitex-contrib/config-nacos/nacos"
+    // ...
+)
+
+func main() {
+    // ... 
+	nacosClient, err := nacos.DefaultClient()
+	if err != nil {
+		panic(err)
+	}
+	fn := func(cp *vo.ConfigParam) {
+		cp.Type = vo.TEXT
+	}
+	opts := []client.Option{
+		client.WithHostPorts("0.0.0.0:8888"),
+		client.WithMiddleware(mymiddleware.CommonMiddleware),
+		client.WithMiddleware(mymiddleware.ClientMiddleware),
+		//client.WithResolver(r),
+	}
+
+	opts = append(opts, retry.NewSuite("echo", nacosClient, fn).Options()...)
+
+	client, err := echo.NewClient(
+		"echo",
+		opts...,
+	)
+    // ...
+}
+```
+
+### 环境变量
+
+| 变量名 | 变量默认值 | 作用 |
+| ------------------------- | ---------------------------------- | --------------------------------- |
+| serverAddr               | 127.0.0.1                          | nacos 服务器地址 |
+| serverPort               | 8848                               | nacos 服务器端口            |
+| namespace                 |                                    | nacos 中的 namespace Id |
+| configDataId              | {{.ClientServiceName}}.{{.ServerServiceName}}.{{.Category}}  | the  format of config data id          |
+| configGroup               | DEFAULT_GROUP                      | the group of config data          |
+
+### 更多信息
+
+更多示例请参考 [example](example)
+
+## 兼容性
+该包使用 Nacos1.x 客户端，Nacos2.0 和 Nacos1.0 服务端完全兼容该版本. [详情](https://nacos.io/zh-cn/docs/v2/upgrading/2.0.0-compatibility.html)

client/client_suite.go

@@ -0,0 +1,46 @@
+// Copyright 2023 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 client
+
+import (
+	"github.com/cloudwego/kitex/client"
+
+	"github.com/kitex-contrib/config-nacos/nacos"
+)
+
+// NacosClientSuite nacos client config suite, configure retry timeout limit and circuitbreak dynamically from nacos.
+type NacosClientSuite struct {
+	nacosClient nacos.Client
+	service     string
+	fns         []nacos.CustomFunction
+}
+
+// NewSuite ...
+func NewSuite(service string, cli nacos.Client,
+	cfs ...nacos.CustomFunction,
+) *NacosClientSuite {
+	return &NacosClientSuite{
+		service:     service,
+		nacosClient: cli,
+		fns:         cfs,
+	}
+}
+
+// Options return a list client.Option
+func (s *NacosClientSuite) Options() []client.Option {
+	opts := make([]client.Option, 0, 8)
+	opts = append(opts, WithRetryPolicy(s.service, s.nacosClient, s.fns...)...)
+	return opts
+}

client/retry.go

@@ -0,0 +1,86 @@
+// Copyright 2023 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 client
+
+import (
+	"github.com/kitex-contrib/config-nacos/nacos"
+	"github.com/nacos-group/nacos-sdk-go/vo"
+
+	"github.com/cloudwego/kitex/client"
+	"github.com/cloudwego/kitex/pkg/klog"
+	"github.com/cloudwego/kitex/pkg/retry"
+)
+
+const (
+	retryConfigName = "retry_config"
+)
+
+// WithRetryPolicy sets the retry policy from nacos config center.
+func WithRetryPolicy(dest string, nacosClient nacos.Client,
+	cfs ...nacos.CustomFunction,
+) []client.Option {
+	param := nacos.NaocsConfigParam(&nacos.ConfigParamConfig{
+		Category:          retryConfigName,
+		ClientServiceName: dest,
+	}, cfs...)
+
+	return []client.Option{
+		client.WithRetryContainer(initRetryContainer(param, dest, nacosClient)),
+		client.WithCloseCallbacks(func() error {
+			// cancel the config listener when client is closed.
+			return nacosClient.DeregisterConfig(param)
+		}),
+	}
+}
+
+// the key is method name, wildcard "*" can match anything.
+type retryConfigs map[string]*retry.Policy
+
+func initRetryContainer(param vo.ConfigParam, dest string,
+	nacosClient nacos.Client,
+) *retry.Container {
+	retryContainer := retry.NewRetryContainer()
+
+	onChangeCallback := func(data string, parser nacos.ConfigParser) {
+		rcs := retryConfigs{}
+		err := parser.Decode(param.Type, data, rcs)
+		if err != nil {
+			klog.Warnf("[nacos] %s client nacos retry: unmarshal data %s failed: %s, skip...", dest, data, err)
+			return
+		}
+
+		for method, policy := range rcs {
+			if policy.BackupPolicy != nil && policy.FailurePolicy != nil {
+				klog.Warnf("[nacos] %s client policy for method %s BackupPolicy and FailurePolicy must not be set at same time",
+					dest, method)
+				continue
+			}
+			if policy.BackupPolicy == nil && policy.FailurePolicy == nil {
+				klog.Warnf("[nacos] %s client policy for method %s BackupPolicy and FailurePolicy must not be empty at same time",
+					dest, method)
+				continue
+			}
+			retryContainer.NotifyPolicyChange(method, *policy)
+		}
+	}
+
+	nacosClient.RegisterConfigCallback(dest,
+		retryConfigName,
+		param,
+		onChangeCallback,
+	)
+
+	return retryContainer
+}

go.mod

@@ -0,0 +1,57 @@
+module github.com/kitex-contrib/config-nacos
+
+go 1.19
+
+require (
+	github.com/cloudwego/kitex v0.6.1
+	github.com/nacos-group/nacos-sdk-go v1.1.4
+	github.com/stretchr/testify v1.8.2
+	sigs.k8s.io/yaml v1.3.0
+)
+
+require (
+	github.com/aliyun/alibaba-cloud-sdk-go v1.61.18 // indirect
+	github.com/apache/thrift v0.13.0 // indirect
+	github.com/buger/jsonparser v1.1.1 // indirect
+	github.com/bytedance/gopkg v0.0.0-20230531144706-a12972768317 // indirect
+	github.com/bytedance/sonic v1.8.8 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
+	github.com/chenzhuoyu/iasm v0.0.0-20230222070914-0b1b64b0e762 // indirect
+	github.com/choleraehyq/pid v0.0.16 // indirect
+	github.com/cloudwego/configmanager v0.2.0 // indirect
+	github.com/cloudwego/fastpb v0.0.4 // indirect
+	github.com/cloudwego/frugal v0.1.6 // indirect
+	github.com/cloudwego/netpoll v0.4.0 // indirect
+	github.com/cloudwego/thriftgo v0.2.11 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
+	github.com/go-errors/errors v1.0.1 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/pprof v0.0.0-20220608213341-c488b8fa1db3 // indirect
+	github.com/jhump/protoreflect v1.8.2 // indirect
+	github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.4 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/oleiade/lane v1.0.1 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/tidwall/gjson v1.9.3 // indirect
+	github.com/tidwall/match v1.1.1 // indirect
+	github.com/tidwall/pretty v1.2.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	go.uber.org/atomic v1.6.0 // indirect
+	go.uber.org/multierr v1.5.0 // indirect
+	go.uber.org/zap v1.15.0 // indirect
+	golang.org/x/arch v0.2.0 // indirect
+	golang.org/x/net v0.0.0-20221014081412-f15817d10f9b // indirect
+	golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4 // indirect
+	golang.org/x/sys v0.0.0-20220817070843-5a390386f1f2 // indirect
+	golang.org/x/text v0.6.0 // indirect
+	google.golang.org/genproto v0.0.0-20210513213006-bf773b8c8384 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
+	gopkg.in/ini.v1 v1.42.0 // indirect
+	gopkg.in/natefinch/lumberjack.v2 v2.0.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)