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/dependabot.yml

@@ -1,19 +0,0 @@
-# To get started with Dependabot version updates, you'll need to specify which
-# package ecosystems to update and where the package manifests are located.
-# Please see the documentation for all configuration options:
-# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
-
-version: 2
-updates:
-
-  # Maintain dependencies for GitHub Actions
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "daily"
-
-  # Maintain dependencies for Golang
-  - package-ecosystem: "gomod"
-    directory: "/"
-    schedule:
-      interval: "daily"

.github/workflows/autoapprove.yml

@@ -1,20 +0,0 @@
-name: "autoapprove"
-
-on:
-  pull_request_target:
-    types: [assigned, opened, synchronize, reopened]
-
-permissions:
-  pull-requests: write
-  contents: write
-
-jobs:
-  autoapprove:
-    runs-on: ubuntu-latest
-    steps:
-      - name: approve
-        uses: hmarr/auto-approve-action@v3
-        if: github.actor == 'vtolstov' || github.actor == 'dependabot[bot]'
-        id: approve
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/automerge.yml

@@ -1,21 +0,0 @@
-name: "automerge"
-
-on:
-  pull_request_target:
-    types: [assigned, opened, synchronize, reopened]
-
-permissions:
-  pull-requests: write
-  contents: write
-
-jobs:
-  automerge:
-    runs-on: ubuntu-latest
-    if: github.actor == 'vtolstov'
-    steps:
-      - name: merge
-        id: merge
-        run: gh pr merge --auto --merge "$PR_URL"
-        env:
-          PR_URL: ${{github.event.pull_request.html_url}}
-          GITHUB_TOKEN: ${{secrets.TOKEN}}

.github/workflows/build.yml

@@ -1,47 +0,0 @@
-name: build
-on:
- push:
-    branches:
-    - master
-    - v3
-jobs:
-  test:
-    name: test
-    runs-on: ubuntu-latest
-    steps:
-    - name: setup
-      uses: actions/setup-go@v3
-      with:
-        go-version: 1.17
-    - name: checkout
-      uses: actions/checkout@v3
-    - name: cache
-      uses: actions/cache@v3
-      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@v3
-      - name: lint
-        uses: golangci/golangci-lint-action@v3.4.0
-        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/codeql-analysis.yml

@@ -1,78 +0,0 @@
-# For most projects, this workflow file will not need changing; you simply need
-# to commit it to your repository.
-#
-# You may wish to alter this file to override the set of languages analyzed,
-# or to provide custom queries or build logic.
-#
-# ******** NOTE ********
-# We have attempted to detect the languages in your repository. Please check
-# the `language` matrix defined below to confirm you have the correct set of
-# supported CodeQL languages.
-#
-name: "codeql"
-
-on:
-  workflow_run:
-    workflows: ["prbuild"]
-    types:
-      - completed
-  push:
-    branches: [ master, v3 ]
-  pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [ master, v3 ]
-  schedule:
-    - cron: '34 1 * * 0'
-
-jobs:
-  analyze:
-    name: analyze
-    runs-on: ubuntu-latest
-    permissions:
-      actions: read
-      contents: read
-      security-events: write
-
-    strategy:
-      fail-fast: false
-      matrix:
-        language: [ 'go' ]
-        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
-        # Learn more:
-        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
-
-    steps:
-    - name: checkout
-      uses: actions/checkout@v3
-    - name: setup
-      uses: actions/setup-go@v3
-      with:
-        go-version: 1.17
-    # Initializes the CodeQL tools for scanning.
-    - name: init
-      uses: github/codeql-action/init@v2
-      with:
-        languages: ${{ matrix.language }}
-        # If you wish to specify custom queries, you can do so here or in a config file.
-        # By default, queries listed here will override any specified in a config file.
-        # Prefix the list here with "+" to use these queries and those in the config file.
-        # queries: ./path/to/local/query, your-org/your-repo/queries@main
-
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
-    # If this step fails, then you should remove it and run the build manually (see below)
-    - name: autobuild
-      uses: github/codeql-action/autobuild@v2
-
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 https://git.io/JvXDl
-
-    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
-    #    and modify them (or add more) to build your code if your project
-    #    uses a compiled language
-
-    #- run: |
-    #   make bootstrap
-    #   make release
-
-    - name: analyze
-      uses: github/codeql-action/analyze@v2

.github/workflows/dependabot-automerge.yml

@@ -1,27 +0,0 @@
-name: "dependabot-automerge"
-
-on:
-  pull_request_target:
-    types: [assigned, opened, synchronize, reopened]
-
-permissions:
-  pull-requests: write
-  contents: write
-
-jobs:
-  automerge:
-    runs-on: ubuntu-latest
-    if: github.actor == 'dependabot[bot]'
-    steps:
-      - name: metadata
-        id: metadata
-        uses: dependabot/fetch-metadata@v1.3.6
-        with:
-          github-token: "${{ secrets.TOKEN }}"
-      - name: merge
-        id: merge
-        if: ${{contains(steps.metadata.outputs.dependency-names, 'go.unistack.org')}}
-        run: gh pr merge --auto --merge "$PR_URL"
-        env:
-          PR_URL: ${{github.event.pull_request.html_url}}
-          GITHUB_TOKEN: ${{secrets.TOKEN}}

.github/workflows/pr.yml

@@ -1,47 +0,0 @@
-name: prbuild
-on:
-  pull_request:
-    branches:
-    - master
-    - v3
-jobs:
-  test:
-    name: test
-    runs-on: ubuntu-latest
-    steps:
-    - name: setup
-      uses: actions/setup-go@v3
-      with:
-        go-version: 1.17
-    - name: checkout
-      uses: actions/checkout@v3
-    - name: cache
-      uses: actions/cache@v3
-      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@v3
-      - name: lint
-        uses: golangci/golangci-lint-action@v3.4.0
-        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 --go-micro_out=components=micro|rpc,standalone=true,debug=true,paths=source_relative:./micro 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

@@ -1,10 +1,24 @@
-module go.unistack.org/micro-config-service/v3
+module go.unistack.org/micro-config-service/v4
+
+go 1.22.0
 
-go 1.16
 
 require (
-	github.com/imdario/mergo v0.3.13
-	go.unistack.org/micro/v3 v3.10.11
-	google.golang.org/grpc v1.53.0
-	google.golang.org/protobuf v1.28.1
+	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
 )

micro/service_micro.pb.go

@@ -1,26 +1,21 @@
 // Code generated by protoc-gen-go-micro. DO NOT EDIT.
-// protoc-gen-go-micro version: v3.5.3
+// 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/v3/proto"
-	api "go.unistack.org/micro/v3/api"
-	client "go.unistack.org/micro/v3/client"
+	proto "go.unistack.org/micro-config-service/v4/proto"
+	client "go.unistack.org/micro/v4/client"
 )
 
 var (
 	ConfigName = "Config"
-
-	ConfigEndpoints = []api.Endpoint{}
 )
 
-func NewConfigEndpoints() []api.Endpoint {
-	return ConfigEndpoints
-}
-
 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)

micro/service_micro_grpc.pb.go

@@ -1,15 +1,14 @@
 // Code generated by protoc-gen-go-micro. DO NOT EDIT.
-// protoc-gen-go-micro version: v3.5.3
+// protoc-gen-go-micro version: v4.1.0
 // source: service.proto
 
 package servicepb
 
 import (
 	context "context"
-	proto "go.unistack.org/micro-config-service/v3/proto"
-	api "go.unistack.org/micro/v3/api"
-	client "go.unistack.org/micro/v3/client"
-	server "go.unistack.org/micro/v3/server"
+	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 {
@@ -60,9 +59,5 @@ func RegisterConfigServer(s server.Server, sh ConfigServer, opts ...server.Handl
 		config
 	}
 	h := &configServer{sh}
-	var nopts []server.HandlerOption
-	for _, endpoint := range ConfigEndpoints {
-		nopts = append(nopts, api.WithEndpoint(&endpoint))
-	}
-	return s.Handle(s.NewHandler(&Config{h}, append(nopts, opts...)...))
+	return s.Handle(s.NewHandler(&Config{h}, opts...))
 }

options.go

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

proto/service.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.26.0
-// 	protoc        v3.17.3
+// 	protoc        v5.29.3
 // source: service.proto
 
 package servicepb
@@ -231,7 +231,7 @@ var file_service_proto_rawDesc = []byte{
 	0x69, 0x63, 0x65, 0x2e, 0x53, 0x61, 0x76, 0x65, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65,
 	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, 0x33, 0x2f, 0x70, 0x72,
+	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,
 }

proto/service.proto

@@ -1,7 +1,7 @@
 syntax = "proto3";
 
 package service;
-option go_package="go.unistack.org/micro-config-service/v3/proto;servicepb";
+option go_package="go.unistack.org/micro-config-service/v4/proto;servicepb";
 
 service Config {
 	rpc Load(LoadRequest) returns (LoadResponse) {};

proto/service_grpc.pb.go

@@ -1,4 +1,8 @@
 // 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 servicepb
 
@@ -11,8 +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.
-// Requires gRPC-Go v1.32.0 or later.
-const _ = grpc.SupportPackageIsVersion7
+// 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.
 //
@@ -31,8 +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
 	}
@@ -40,8 +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
 	}
@@ -50,16 +61,19 @@ 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) {
 	return nil, status.Errorf(codes.Unimplemented, "method Load not implemented")
@@ -68,6 +82,7 @@ func (UnimplementedConfigServer) Save(context.Context, *SaveRequest) (*SaveRespo
 	return nil, status.Errorf(codes.Unimplemented, "method Save not implemented")
 }
 func (UnimplementedConfigServer) mustEmbedUnimplementedConfigServer() {}
+func (UnimplementedConfigServer) testEmbeddedByValue()                {}
 
 // 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
@@ -77,6 +92,13 @@ type UnsafeConfigServer interface {
 }
 
 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)
 }
 
@@ -90,7 +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))
@@ -108,7 +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))

service.go

@@ -1,15 +1,15 @@
-package service // import "go.unistack.org/micro-config-service/v3"
+package service
 
 import (
 	"context"
 	"fmt"
 
-	"github.com/imdario/mergo"
-	pbmicro "go.unistack.org/micro-config-service/v3/micro"
-	pb "go.unistack.org/micro-config-service/v3/proto"
-	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v3/config"
-	rutil "go.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 _ config.Config = &serviceConfig{}
@@ -27,6 +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)
 	}
@@ -43,39 +47,55 @@ func (c *serviceConfig) Init(opts ...config.Option) error {
 
 	if cli == nil {
 		err := fmt.Errorf("missing client option")
-		c.opts.Logger.Error(c.opts.Context, err)
 		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 == "" {
 		err := fmt.Errorf("missing Service option")
-		c.opts.Logger.Error(c.opts.Context, err)
 		if !c.opts.AllowFail {
 			return err
 		}
+
+		if err := config.DefaultAfterInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
+			return err
+		}
+
 		return nil
 	}
 
 	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 {
+	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.Logger.Errorf(ctx, "service load error: %v", err)
 		if !c.opts.AllowFail {
 			return fmt.Errorf("failed to load config: %w", err)
 		}
-		return config.DefaultAfterLoad(ctx, c)
+
+		if err = config.DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
+			return err
+		}
+
+		return nil
 	}
 
 	options := config.NewLoadOptions(opts...)
@@ -87,22 +107,24 @@ func (c *serviceConfig) Load(ctx context.Context, opts ...config.LoadOption) err
 		mopts = append(mopts, mergo.WithAppendSlice)
 	}
 
-	src, err := rutil.Zero(c.opts.Struct)
+	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(c.opts.Struct, src, mopts...)
+			err = mergo.Merge(dst, src, mopts...)
 		}
 	}
 
-	if err != nil {
-		c.opts.Logger.Errorf(ctx, "service load error: %v", err)
-		if !c.opts.AllowFail {
-			return fmt.Errorf("failed to load config: %w", err)
-		}
+	if err != nil && !c.opts.AllowFail {
+		return fmt.Errorf("failed to load config: %w", err)
 	}
 
-	if err := config.DefaultAfterLoad(ctx, c); err != nil {
+	if err := config.DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
 		return err
 	}
 
@@ -110,22 +132,26 @@ func (c *serviceConfig) Load(ctx context.Context, opts ...config.LoadOption) err
 }
 
 func (c *serviceConfig) Save(ctx context.Context, opts ...config.SaveOption) error {
-	if err := config.DefaultBeforeSave(ctx, c); err != nil {
+	if err := config.DefaultBeforeSave(ctx, c); err != nil && !c.opts.AllowFail {
 		return err
 	}
 
-	buf, err := c.opts.Codec.Marshal(c.opts.Struct)
+	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.Logger.Errorf(ctx, "service save error: %v", err)
-		if !c.opts.AllowFail {
-			return fmt.Errorf("failed to save config: %w", err)
-		}
+	if err != nil && !c.opts.AllowFail {
+		return fmt.Errorf("failed to save config: %w", err)
 	}
 
-	if err := config.DefaultAfterSave(ctx, c); err != nil {
+	if err := config.DefaultAfterSave(ctx, c); err != nil && !c.opts.AllowFail {
 		return err
 	}