move to micro v4

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

.gitea/workflows/job_lint.yml

@@ -0,0 +1,29 @@
+name: lint
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+    branches:
+    - master
+    - v3
+    - v4
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+    - name: checkout code
+      uses: actions/checkout@v4
+      with:
+        filter: 'blob:none'
+    - name: setup go
+      uses: actions/setup-go@v5
+      with:
+        cache-dependency-path: "**/*.sum"
+        go-version: 'stable' 
+    - name: setup deps
+      run: go get -v ./...
+    - name: run lint
+      uses: https://github.com/golangci/golangci-lint-action@v6
+      with:
+        version: 'latest'

.gitea/workflows/job_test.yml

@@ -0,0 +1,34 @@
+name: test
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+    branches:
+    - master
+    - v3
+    - v4
+  push:
+    branches:
+    - master
+    - v3
+    - v4
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - name: checkout code
+      uses: actions/checkout@v4
+      with:
+        filter: 'blob:none'
+    - name: setup go
+      uses: actions/setup-go@v5
+      with:
+        cache-dependency-path: "**/*.sum"
+        go-version: 'stable'
+    - name: setup deps
+      run: go get -v ./...
+    - name: run test
+      env:
+        INTEGRATION_TESTS: yes
+      run: go test -mod readonly -v ./...

.gitea/workflows/job_tests.yml

@@ -0,0 +1,53 @@
+name: test
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+    branches:
+    - master
+    - v3
+    - v4
+  push:
+    branches:
+    - master
+    - v3
+    - v4
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - name: checkout code
+      uses: actions/checkout@v4
+      with:
+        filter: 'blob:none'
+    - name: checkout tests
+      uses: actions/checkout@v4
+      with:
+        ref: master
+        filter: 'blob:none'
+        repository: unistack-org/micro-tests
+        path: micro-tests
+    - name: setup go
+      uses: actions/setup-go@v5
+      with:
+        cache-dependency-path: "**/*.sum"
+        go-version: 'stable'
+    - name: setup go work
+      env:
+        GOWORK: /workspace/${{ github.repository_owner }}/go.work
+      run: |
+        go work init
+        go work use .
+        go work use micro-tests        
+    - name: setup deps
+      env:
+        GOWORK: /workspace/${{ github.repository_owner }}/go.work
+      run: go get -v ./...
+    - name: run tests
+      env:
+        INTEGRATION_TESTS: yes
+        GOWORK: /workspace/${{ github.repository_owner }}/go.work
+      run: |
+        cd micro-tests
+        go test -mod readonly -v ./... || true        

.github/stale.sh

@@ -1,13 +0,0 @@
-#!/bin/bash -ex
-
-export PATH=$PATH:$(pwd)/bin
-export GO111MODULE=on
-export GOBIN=$(pwd)/bin
-
-#go get github.com/rvflash/goup@v0.4.1
-
-#goup -v ./...
-#go get github.com/psampaz/go-mod-outdated@v0.6.0
-go list -u -m -mod=mod -json all | go-mod-outdated -update -direct -ci || true
-
-#go list -u -m -json all | go-mod-outdated -update

.github/workflows/build.yml

@@ -1,46 +0,0 @@
-name: build
-on:
- push:
-    branches:
-    - master
-jobs:
-  test:
-    name: test
-    runs-on: ubuntu-latest
-    steps:
-    - name: setup
-      uses: actions/setup-go@v1
-      with:
-        go-version: 1.15
-    - name: checkout
-      uses: actions/checkout@v2
-    - name: cache
-      uses: actions/cache@v2
-      with:
-        path: ~/go/pkg/mod
-        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
-        restore-keys: ${{ runner.os }}-go-
-    - name: deps
-      run: go get -v -t -d ./...
-    - name: test
-      env:
-        INTEGRATION_TESTS: yes
-      run: go test -mod readonly -v ./...
-  lint:
-    name: lint
-    runs-on: ubuntu-latest
-    steps:
-      - name: checkout
-        uses: actions/checkout@v2
-      - name: lint
-        uses: golangci/golangci-lint-action@v1
-        continue-on-error: true
-        with:
-          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
-          version: v1.30
-          # Optional: working directory, useful for monorepos
-          # working-directory: somedir
-          # Optional: golangci-lint command line arguments.
-          # args: --issues-exit-code=0
-          # Optional: show only new issues if it's a pull request. The default value is `false`.
-          # only-new-issues: true

.github/workflows/pr.yml

@@ -1,46 +0,0 @@
-name: prbuild
-on:
-  pull_request:
-    branches:
-    - master
-jobs:
-  test:
-    name: test
-    runs-on: ubuntu-latest
-    steps:
-    - name: setup
-      uses: actions/setup-go@v1
-      with:
-        go-version: 1.15
-    - name: checkout
-      uses: actions/checkout@v2
-    - name: cache
-      uses: actions/cache@v2
-      with:
-        path: ~/go/pkg/mod
-        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
-        restore-keys: ${{ runner.os }}-go-
-    - name: deps
-      run: go get -v -t -d ./...
-    - name: test
-      env:
-        INTEGRATION_TESTS: yes
-      run: go test -mod readonly -v ./...
-  lint:
-    name: lint
-    runs-on: ubuntu-latest
-    steps:
-      - name: checkout
-        uses: actions/checkout@v2
-      - name: lint
-        uses: golangci/golangci-lint-action@v1
-        continue-on-error: true
-        with:
-          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
-          version: v1.30
-          # Optional: working directory, useful for monorepos
-          # working-directory: somedir
-          # Optional: golangci-lint command line arguments.
-          # args: --issues-exit-code=0
-          # Optional: show only new issues if it's a pull request. The default value is `false`.
-          # only-new-issues: true

.golangci.yml

@@ -0,0 +1,5 @@
+run:
+  concurrency: 8
+  deadline: 5m
+  issues-exit-code: 1
+  tests: true

generate.go

@@ -1,3 +1,3 @@
 package service
 
-//go:generate protoc -I./proto -I. --go-grpc_out=paths=source_relative:./proto --go_out=paths=source_relative:./proto --micro_out=debug=true,paths=source_relative:./proto proto/service.proto
+//go:generate protoc -I./proto -I. --go-grpc_out=paths=source_relative:./proto --go_out=paths=source_relative:./proto --go-micro_out=components=micro|grpc,standalone=true,debug=true,paths=source_relative:./micro proto/service.proto

go.mod

@@ -1,12 +1,24 @@
-module github.com/unistack-org/micro-config-service/v3
+module go.unistack.org/micro-config-service/v4
+
+go 1.22.0
 
-go 1.14
 
 require (
-	github.com/golang/protobuf v1.4.3
-	github.com/imdario/mergo v0.3.11
-	github.com/unistack-org/micro/v3 v3.2.4
-	google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d // indirect
-	google.golang.org/grpc v1.27.0
-	google.golang.org/protobuf v1.25.0
+	dario.cat/mergo v1.0.1
+	go.unistack.org/micro/v4 v4.1.3
+	google.golang.org/grpc v1.71.0
+	google.golang.org/protobuf v1.36.5
+)
+
+require (
+	github.com/ash3in/uuidv8 v1.2.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/matoous/go-nanoid v1.5.1 // indirect
+	github.com/spf13/cast v1.7.1 // indirect
+	go.unistack.org/micro-proto/v4 v4.1.0 // indirect
+	golang.org/x/net v0.37.0 // indirect
+	golang.org/x/sys v0.31.0 // indirect
+	golang.org/x/text v0.23.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250303144028-a0af3efb3deb // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,128 +1,59 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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micro/service_micro.pb.go

@@ -0,0 +1,27 @@
+// Code generated by protoc-gen-go-micro. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-micro v4.1.0
+// - protoc              v5.29.3
+// source: service.proto
+
+package servicepb
+
+import (
+	context "context"
+	proto "go.unistack.org/micro-config-service/v4/proto"
+	client "go.unistack.org/micro/v4/client"
+)
+
+var (
+	ConfigName = "Config"
+)
+
+type ConfigClient interface {
+	Load(ctx context.Context, req *proto.LoadRequest, opts ...client.CallOption) (*proto.LoadResponse, error)
+	Save(ctx context.Context, req *proto.SaveRequest, opts ...client.CallOption) (*proto.SaveResponse, error)
+}
+
+type ConfigServer interface {
+	Load(ctx context.Context, req *proto.LoadRequest, rsp *proto.LoadResponse) error
+	Save(ctx context.Context, req *proto.SaveRequest, rsp *proto.SaveResponse) error
+}

micro/service_micro_grpc.pb.go

@@ -0,0 +1,63 @@
+// Code generated by protoc-gen-go-micro. DO NOT EDIT.
+// protoc-gen-go-micro version: v4.1.0
+// source: service.proto
+
+package servicepb
+
+import (
+	context "context"
+	proto "go.unistack.org/micro-config-service/v4/proto"
+	client "go.unistack.org/micro/v4/client"
+	server "go.unistack.org/micro/v4/server"
+)
+
+type configClient struct {
+	c    client.Client
+	name string
+}
+
+func NewConfigClient(name string, c client.Client) ConfigClient {
+	return &configClient{c: c, name: name}
+}
+
+func (c *configClient) Load(ctx context.Context, req *proto.LoadRequest, opts ...client.CallOption) (*proto.LoadResponse, error) {
+	rsp := &proto.LoadResponse{}
+	err := c.c.Call(ctx, c.c.NewRequest(c.name, "Config.Load", req), rsp, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return rsp, nil
+}
+
+func (c *configClient) Save(ctx context.Context, req *proto.SaveRequest, opts ...client.CallOption) (*proto.SaveResponse, error) {
+	rsp := &proto.SaveResponse{}
+	err := c.c.Call(ctx, c.c.NewRequest(c.name, "Config.Save", req), rsp, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return rsp, nil
+}
+
+type configServer struct {
+	ConfigServer
+}
+
+func (h *configServer) Load(ctx context.Context, req *proto.LoadRequest, rsp *proto.LoadResponse) error {
+	return h.ConfigServer.Load(ctx, req, rsp)
+}
+
+func (h *configServer) Save(ctx context.Context, req *proto.SaveRequest, rsp *proto.SaveResponse) error {
+	return h.ConfigServer.Save(ctx, req, rsp)
+}
+
+func RegisterConfigServer(s server.Server, sh ConfigServer, opts ...server.HandlerOption) error {
+	type config interface {
+		Load(ctx context.Context, req *proto.LoadRequest, rsp *proto.LoadResponse) error
+		Save(ctx context.Context, req *proto.SaveRequest, rsp *proto.SaveResponse) error
+	}
+	type Config struct {
+		config
+	}
+	h := &configServer{sh}
+	return s.Handle(s.NewHandler(&Config{h}, opts...))
+}

options.go

@@ -1,8 +1,8 @@
 package service
 
 import (
-	"github.com/unistack-org/micro/v3/client"
-	"github.com/unistack-org/micro/v3/config"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/config"
 )
 
 type clientKey struct{}

proto/service.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0-devel
-// 	protoc        v3.6.1
+// 	protoc-gen-go v1.26.0
+// 	protoc        v5.29.3
 // source: service.proto
 
-package service
+package servicepb
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
-// This is a compile-time assertion that a sufficiently up-to-date version
-// of the legacy proto package is being used.
-const _ = proto.ProtoPackageIsVersion4
-
 type LoadRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -234,11 +229,11 @@ var file_service_proto_rawDesc = []byte{
 	0x61, 0x76, 0x65, 0x12, 0x14, 0x2e, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x2e, 0x53, 0x61,
 	0x76, 0x65, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x15, 0x2e, 0x73, 0x65, 0x72, 0x76,
 	0x69, 0x63, 0x65, 0x2e, 0x53, 0x61, 0x76, 0x65, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65,
-	0x22, 0x00, 0x42, 0x36, 0x5a, 0x34, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d,
-	0x2f, 0x75, 0x6e, 0x69, 0x73, 0x74, 0x61, 0x63, 0x6b, 0x2d, 0x6f, 0x72, 0x67, 0x2f, 0x6d, 0x69,
-	0x63, 0x72, 0x6f, 0x2d, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x2d, 0x73, 0x65, 0x72, 0x76, 0x69,
-	0x63, 0x65, 0x3b, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
-	0x6f, 0x33,
+	0x22, 0x00, 0x42, 0x39, 0x5a, 0x37, 0x67, 0x6f, 0x2e, 0x75, 0x6e, 0x69, 0x73, 0x74, 0x61, 0x63,
+	0x6b, 0x2e, 0x6f, 0x72, 0x67, 0x2f, 0x6d, 0x69, 0x63, 0x72, 0x6f, 0x2d, 0x63, 0x6f, 0x6e, 0x66,
+	0x69, 0x67, 0x2d, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x2f, 0x76, 0x34, 0x2f, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x3b, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x70, 0x62, 0x62, 0x06, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

proto/service.proto

@@ -1,7 +1,7 @@
 syntax = "proto3";
 
 package service;
-option go_package="github.com/unistack-org/micro-config-service;service";
+option go_package="go.unistack.org/micro-config-service/v4/proto;servicepb";
 
 service Config {
 	rpc Load(LoadRequest) returns (LoadResponse) {};

proto/service_grpc.pb.go

@@ -1,6 +1,10 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.5.1
+// - protoc             v5.29.3
+// source: service.proto
 
-package service
+package servicepb
 
 import (
 	context "context"
@@ -11,7 +15,13 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+// Requires gRPC-Go v1.64.0 or later.
+const _ = grpc.SupportPackageIsVersion9
+
+const (
+	Config_Load_FullMethodName = "/service.Config/Load"
+	Config_Save_FullMethodName = "/service.Config/Save"
+)
 
 // ConfigClient is the client API for Config service.
 //
@@ -30,8 +40,9 @@ func NewConfigClient(cc grpc.ClientConnInterface) ConfigClient {
 }
 
 func (c *configClient) Load(ctx context.Context, in *LoadRequest, opts ...grpc.CallOption) (*LoadResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
 	out := new(LoadResponse)
-	err := c.cc.Invoke(ctx, "/service.Config/Load", in, out, opts...)
+	err := c.cc.Invoke(ctx, Config_Load_FullMethodName, in, out, cOpts...)
 	if err != nil {
 		return nil, err
 	}
@@ -39,8 +50,9 @@ func (c *configClient) Load(ctx context.Context, in *LoadRequest, opts ...grpc.C
 }
 
 func (c *configClient) Save(ctx context.Context, in *SaveRequest, opts ...grpc.CallOption) (*SaveResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
 	out := new(SaveResponse)
-	err := c.cc.Invoke(ctx, "/service.Config/Save", in, out, opts...)
+	err := c.cc.Invoke(ctx, Config_Save_FullMethodName, in, out, cOpts...)
 	if err != nil {
 		return nil, err
 	}
@@ -49,27 +61,45 @@ func (c *configClient) Save(ctx context.Context, in *SaveRequest, opts ...grpc.C
 
 // ConfigServer is the server API for Config service.
 // All implementations must embed UnimplementedConfigServer
-// for forward compatibility
+// for forward compatibility.
 type ConfigServer interface {
 	Load(context.Context, *LoadRequest) (*LoadResponse, error)
 	Save(context.Context, *SaveRequest) (*SaveResponse, error)
 	mustEmbedUnimplementedConfigServer()
 }
 
-// UnimplementedConfigServer must be embedded to have forward compatible implementations.
-type UnimplementedConfigServer struct {
-}
+// UnimplementedConfigServer must be embedded to have
+// forward compatible implementations.
+//
+// NOTE: this should be embedded by value instead of pointer to avoid a nil
+// pointer dereference when methods are called.
+type UnimplementedConfigServer struct{}
 
-func (*UnimplementedConfigServer) Load(context.Context, *LoadRequest) (*LoadResponse, error) {
+func (UnimplementedConfigServer) Load(context.Context, *LoadRequest) (*LoadResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method Load not implemented")
 }
-func (*UnimplementedConfigServer) Save(context.Context, *SaveRequest) (*SaveResponse, error) {
+func (UnimplementedConfigServer) Save(context.Context, *SaveRequest) (*SaveResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method Save not implemented")
 }
-func (*UnimplementedConfigServer) mustEmbedUnimplementedConfigServer() {}
+func (UnimplementedConfigServer) mustEmbedUnimplementedConfigServer() {}
+func (UnimplementedConfigServer) testEmbeddedByValue()                {}
 
-func RegisterConfigServer(s *grpc.Server, srv ConfigServer) {
-	s.RegisterService(&_Config_serviceDesc, srv)
+// UnsafeConfigServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to ConfigServer will
+// result in compilation errors.
+type UnsafeConfigServer interface {
+	mustEmbedUnimplementedConfigServer()
+}
+
+func RegisterConfigServer(s grpc.ServiceRegistrar, srv ConfigServer) {
+	// If the following call pancis, it indicates UnimplementedConfigServer was
+	// embedded by pointer and is nil.  This will cause panics if an
+	// unimplemented method is ever invoked, so we test this at initialization
+	// time to prevent it from happening at runtime later due to I/O.
+	if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
+		t.testEmbeddedByValue()
+	}
+	s.RegisterService(&Config_ServiceDesc, srv)
 }
 
 func _Config_Load_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
@@ -82,7 +112,7 @@ func _Config_Load_Handler(srv interface{}, ctx context.Context, dec func(interfa
 	}
 	info := &grpc.UnaryServerInfo{
 		Server:     srv,
-		FullMethod: "/service.Config/Load",
+		FullMethod: Config_Load_FullMethodName,
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
 		return srv.(ConfigServer).Load(ctx, req.(*LoadRequest))
@@ -100,7 +130,7 @@ func _Config_Save_Handler(srv interface{}, ctx context.Context, dec func(interfa
 	}
 	info := &grpc.UnaryServerInfo{
 		Server:     srv,
-		FullMethod: "/service.Config/Save",
+		FullMethod: Config_Save_FullMethodName,
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
 		return srv.(ConfigServer).Save(ctx, req.(*SaveRequest))
@@ -108,7 +138,10 @@ func _Config_Save_Handler(srv interface{}, ctx context.Context, dec func(interfa
 	return interceptor(ctx, in, info, handler)
 }
 
-var _Config_serviceDesc = grpc.ServiceDesc{
+// Config_ServiceDesc is the grpc.ServiceDesc for Config service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var Config_ServiceDesc = grpc.ServiceDesc{
 	ServiceName: "service.Config",
 	HandlerType: (*ConfigServer)(nil),
 	Methods: []grpc.MethodDesc{

proto/service_micro.pb.go

@@ -1,47 +0,0 @@
-// Code generated by protoc-gen-micro
-// source: service.proto
-package service
-
-import (
-	"context"
-
-	micro_api "github.com/unistack-org/micro/v3/api"
-	micro_client "github.com/unistack-org/micro/v3/client"
-	micro_server "github.com/unistack-org/micro/v3/server"
-)
-
-// NewConfigEndpoints provides api endpoints metdata for Config service
-func NewConfigEndpoints() []*micro_api.Endpoint {
-	var endpoints []*micro_api.Endpoint
-	return endpoints
-}
-
-// ConfigService interface
-type ConfigService interface {
-	Load(context.Context, *LoadRequest, ...micro_client.CallOption) (*LoadResponse, error)
-	Save(context.Context, *SaveRequest, ...micro_client.CallOption) (*SaveResponse, error)
-}
-
-// Micro server stuff
-
-// ConfigHandler server handler
-type ConfigHandler interface {
-	Load(context.Context, *LoadRequest, *LoadResponse) error
-	Save(context.Context, *SaveRequest, *SaveResponse) error
-}
-
-// RegisterConfigHandler registers server handler
-func RegisterConfigHandler(s micro_server.Server, sh ConfigHandler, opts ...micro_server.HandlerOption) error {
-	type config interface {
-		Load(context.Context, *LoadRequest, *LoadResponse) error
-		Save(context.Context, *SaveRequest, *SaveResponse) error
-	}
-	type Config struct {
-		config
-	}
-	h := &configHandler{sh}
-	for _, endpoint := range NewConfigEndpoints() {
-		opts = append(opts, micro_api.WithEndpoint(endpoint))
-	}
-	return s.Handle(s.NewHandler(&Config{h}, opts...))
-}

proto/service_micro_grpc.pb.go

@@ -1,58 +0,0 @@
-// Code generated by protoc-gen-micro
-// source: service.proto
-package service
-
-import (
-	"context"
-
-	micro_client "github.com/unistack-org/micro/v3/client"
-	micro_server "github.com/unistack-org/micro/v3/server"
-)
-
-var (
-	_ micro_server.Option
-	_ micro_client.Option
-)
-
-type configService struct {
-	c    micro_client.Client
-	name string
-}
-
-// Micro client stuff
-
-// NewConfigService create new service client
-func NewConfigService(name string, c micro_client.Client) ConfigService {
-	return &configService{c: c, name: name}
-}
-
-func (c *configService) Load(ctx context.Context, req *LoadRequest, opts ...micro_client.CallOption) (*LoadResponse, error) {
-	rsp := &LoadResponse{}
-	err := c.c.Call(ctx, c.c.NewRequest(c.name, "Config.Load", req), rsp, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return rsp, nil
-}
-func (c *configService) Save(ctx context.Context, req *SaveRequest, opts ...micro_client.CallOption) (*SaveResponse, error) {
-	rsp := &SaveResponse{}
-	err := c.c.Call(ctx, c.c.NewRequest(c.name, "Config.Save", req), rsp, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return rsp, nil
-}
-
-// Micro server stuff
-
-type configHandler struct {
-	ConfigHandler
-}
-
-func (h *configHandler) Load(ctx context.Context, req *LoadRequest, rsp *LoadResponse) error {
-	return h.ConfigHandler.Load(ctx, req, rsp)
-}
-
-func (h *configHandler) Save(ctx context.Context, req *SaveRequest, rsp *SaveResponse) error {
-	return h.ConfigHandler.Save(ctx, req, rsp)
-}

service.go

@@ -4,21 +4,22 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/imdario/mergo"
-	pb "github.com/unistack-org/micro-config-service/v3/proto"
-	"github.com/unistack-org/micro/v3/client"
-	"github.com/unistack-org/micro/v3/config"
-	rutil "github.com/unistack-org/micro/v3/util/reflect"
+	"dario.cat/mergo"
+	pbmicro "go.unistack.org/micro-config-service/v4/micro"
+	pb "go.unistack.org/micro-config-service/v4/proto"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/config"
+	rutil "go.unistack.org/micro/v4/util/reflect"
 )
 
-var (
-	DefaultStructTag = "service"
-)
+var _ config.Config = &serviceConfig{}
+
+var DefaultStructTag = "service"
 
 type serviceConfig struct {
 	opts    config.Options
 	service string
-	client  pb.ConfigService
+	client  pbmicro.ConfigClient
 }
 
 func (c *serviceConfig) Options() config.Options {
@@ -26,6 +27,10 @@ func (c *serviceConfig) Options() config.Options {
 }
 
 func (c *serviceConfig) Init(opts ...config.Option) error {
+	if err := config.DefaultBeforeInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
+		return err
+	}
+
 	for _, o := range opts {
 		o(&c.opts)
 	}
@@ -41,61 +46,113 @@ func (c *serviceConfig) Init(opts ...config.Option) error {
 	}
 
 	if cli == nil {
-		return fmt.Errorf("missing Client option")
+		err := fmt.Errorf("missing client option")
+		if !c.opts.AllowFail {
+			return err
+		}
+
+		if err := config.DefaultAfterInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
+			return err
+		}
+
+		return nil
 	}
 
 	if c.service == "" {
-		return fmt.Errorf("missing Service option")
+		err := fmt.Errorf("missing Service option")
+		if !c.opts.AllowFail {
+			return err
 		}
 
-	c.client = pb.NewConfigService(c.service, cli)
+		if err := config.DefaultAfterInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
+			return err
+		}
 
 		return nil
 	}
 
-func (c *serviceConfig) Load(ctx context.Context) error {
-	for _, fn := range c.opts.BeforeLoad {
-		if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
+	c.client = pbmicro.NewConfigClient(c.service, cli)
+
+	if err := config.DefaultAfterInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
 		return err
 	}
+
+	return nil
+}
+
+func (c *serviceConfig) Load(ctx context.Context, opts ...config.LoadOption) error {
+	if err := config.DefaultBeforeLoad(ctx, c); err != nil && !c.opts.AllowFail {
+		return err
 	}
 
 	rsp, err := c.client.Load(ctx, &pb.LoadRequest{Service: c.service})
-	if err != nil && !c.opts.AllowFail {
-		return fmt.Errorf("failed to load error config: %w", err)
+	if err != nil {
+		if !c.opts.AllowFail {
+			return fmt.Errorf("failed to load config: %w", err)
 		}
 
-	src, err := rutil.Zero(c.opts.Struct)
-	if err == nil {
-		err = c.opts.Codec.Unmarshal(rsp.Config, src)
-		if err == nil {
-			err = mergo.Merge(c.opts.Struct, src, mergo.WithOverride, mergo.WithTypeCheck, mergo.WithAppendSlice)
-		}
-	}
-	if err != nil && !c.opts.AllowFail {
+		if err = config.DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
 			return err
 		}
 
-	for _, fn := range c.opts.AfterLoad {
-		if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
-			return err
-		}
-	}
-
 		return nil
 	}
 
-func (c *serviceConfig) Save(ctx context.Context) error {
-	for _, fn := range c.opts.BeforeSave {
-		if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
-			return err
+	options := config.NewLoadOptions(opts...)
+	mopts := []func(*mergo.Config){mergo.WithTypeCheck}
+	if options.Override {
+		mopts = append(mopts, mergo.WithOverride)
+	}
+	if options.Append {
+		mopts = append(mopts, mergo.WithAppendSlice)
+	}
+
+	dst := c.opts.Struct
+	if options.Struct != nil {
+		dst = options.Struct
+	}
+
+	src, err := rutil.Zero(dst)
+	if err == nil {
+		err = c.opts.Codec.Unmarshal(rsp.Config, src)
+		if err == nil {
+			err = mergo.Merge(dst, src, mopts...)
 		}
 	}
 
-	for _, fn := range c.opts.AfterSave {
-		if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
+	if err != nil && !c.opts.AllowFail {
+		return fmt.Errorf("failed to load config: %w", err)
+	}
+
+	if err := config.DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
 		return err
 	}
+
+	return nil
+}
+
+func (c *serviceConfig) Save(ctx context.Context, opts ...config.SaveOption) error {
+	if err := config.DefaultBeforeSave(ctx, c); err != nil && !c.opts.AllowFail {
+		return err
+	}
+
+	options := config.NewSaveOptions(opts...)
+
+	dst := c.opts.Struct
+	if options.Struct != nil {
+		dst = options.Struct
+	}
+
+	buf, err := c.opts.Codec.Marshal(dst)
+	if err == nil {
+		_, err = c.client.Save(ctx, &pb.SaveRequest{Service: c.service, Config: buf})
+	}
+	if err != nil && !c.opts.AllowFail {
+		return fmt.Errorf("failed to save config: %w", err)
+	}
+
+	if err := config.DefaultAfterSave(ctx, c); err != nil && !c.opts.AllowFail {
+		return err
 	}
 
 	return nil
@@ -109,7 +166,11 @@ func (c *serviceConfig) Name() string {
 	return c.opts.Name
 }
 
-func NewConfig(opts ...config.Option) config.Config {
+func (c *serviceConfig) Watch(ctx context.Context, opts ...config.WatchOption) (config.Watcher, error) {
+	return nil, fmt.Errorf("not implemented")
+}
+
+func NewConfig(opts ...config.Option) *serviceConfig {
 	options := config.NewOptions(opts...)
 	if len(options.StructTag) == 0 {
 		options.StructTag = DefaultStructTag