api/resolver/grpc/grpc.go

@@ -9,10 +9,12 @@ import (
 	"github.com/unistack-org/micro/v3/api/resolver"
 )
 
+// Resolver struct
 type Resolver struct {
 	opts resolver.Options
 }
 
+// Resolve func to resolve enndpoint
 func (r *Resolver) Resolve(req *http.Request, opts ...resolver.ResolveOption) (*resolver.Endpoint, error) {
 	// parse options
 	options := resolver.NewResolveOptions(opts...)
@@ -39,6 +41,7 @@ func (r *Resolver) String() string {
 	return "grpc"
 }
 
+// NewResolver is used to create new Resolver
 func NewResolver(opts ...resolver.Option) resolver.Resolver {
 	return &Resolver{opts: resolver.NewOptions(opts...)}
 }

api/resolver/options.go

@@ -4,11 +4,13 @@ import (
 	"github.com/unistack-org/micro/v3/registry"
 )
 
+// Options struct
 type Options struct {
 	Handler       string
 	ServicePrefix string
 }
 
+// Option func
 type Option func(o *Options)
 
 // WithHandler sets the handler being used
@@ -27,7 +29,7 @@ func WithServicePrefix(p string) Option {
 
 // NewOptions returns new initialised options
 func NewOptions(opts ...Option) Options {
-	var options Options
+	options := Options{}
 	for _, o := range opts {
 		o(&options)
 	}
@@ -51,13 +53,10 @@ func Domain(n string) ResolveOption {
 
 // NewResolveOptions returns new initialised resolve options
 func NewResolveOptions(opts ...ResolveOption) ResolveOptions {
-	var options ResolveOptions
+	options := ResolveOptions{Domain: registry.DefaultDomain}
 	for _, o := range opts {
 		o(&options)
 	}
-	if len(options.Domain) == 0 {
-		options.Domain = registry.DefaultDomain
-	}
 
 	return options
 }

api/resolver/resolver.go

@@ -7,7 +7,9 @@ import (
 )
 
 var (
-	ErrNotFound    = errors.New("not found")
+	// ErrNotFound returned when endpoint is not found
+	ErrNotFound = errors.New("not found")
+	// ErrInvalidPath returned on invalid path
 	ErrInvalidPath = errors.New("invalid path")
 )
 
@@ -19,7 +21,7 @@ type Resolver interface {
 
 // Endpoint is the endpoint for a http request
 type Endpoint struct {
-	// e.g greeter
+	// Endpoint name e.g greeter
 	Name string
 	// HTTP Host e.g example.com
 	Host string

api/server/options.go

@@ -23,6 +23,7 @@ type Options struct {
 	Wrappers     []Wrapper
 }
 
+// NewOptions returns new Options
 func NewOptions(opts ...Option) Options {
 	options := Options{}
 	for _, o := range opts {

broker/broker.go

@@ -4,7 +4,7 @@ package broker
 import "context"
 
 var (
-	DefaultBroker Broker = &NoopBroker{opts: NewOptions()}
+	DefaultBroker Broker = NewBroker()
 )
 
 // Broker is an interface used for asynchronous messaging.

broker/noop.go

@@ -2,7 +2,7 @@ package broker
 
 import "context"
 
-type NoopBroker struct {
+type noopBroker struct {
 	opts Options
 }
 
@@ -11,7 +11,13 @@ type noopSubscriber struct {
 	opts  SubscribeOptions
 }
 
-func (n *NoopBroker) Init(opts ...Option) error {
+// NewBroker returns new noop broker
+func NewBroker(opts ...Option) Broker {
+	return &noopBroker{opts: NewOptions(opts...)}
+}
+
+// Init initialize broker
+func (n *noopBroker) Init(opts ...Option) error {
 	for _, o := range opts {
 		o(&n.opts)
 	}
@@ -19,48 +25,53 @@ func (n *NoopBroker) Init(opts ...Option) error {
 	return nil
 }
 
-func (n *NoopBroker) Options() Options {
+// Options returns broker Options
+func (n *noopBroker) Options() Options {
 	return n.opts
 }
 
-func (n *NoopBroker) Address() string {
+// Address returns broker address
+func (n *noopBroker) Address() string {
 	return ""
 }
 
-func (n *NoopBroker) Connect(ctx context.Context) error {
+// Connect connects to broker
+func (n *noopBroker) Connect(ctx context.Context) error {
 	return nil
 }
 
-func (n *NoopBroker) Disconnect(ctx context.Context) error {
+// Disconnect disconnects from broker
+func (n *noopBroker) Disconnect(ctx context.Context) error {
 	return nil
 }
 
-func (n *NoopBroker) Publish(ctx context.Context, topic string, m *Message, opts ...PublishOption) error {
+// Publish publishes message to broker
+func (n *noopBroker) Publish(ctx context.Context, topic string, m *Message, opts ...PublishOption) error {
 	return nil
 }
 
-func (n *NoopBroker) Subscribe(ctx context.Context, topic string, h Handler, opts ...SubscribeOption) (Subscriber, error) {
-	options := NewSubscribeOptions()
-
-	for _, o := range opts {
-		o(&options)
-	}
-
+// Subscribe subscribes to broker topic
+func (n *noopBroker) Subscribe(ctx context.Context, topic string, h Handler, opts ...SubscribeOption) (Subscriber, error) {
+	options := NewSubscribeOptions(opts...)
 	return &noopSubscriber{topic: topic, opts: options}, nil
 }
 
-func (n *NoopBroker) String() string {
+// String return broker string representation
+func (n *noopBroker) String() string {
 	return "noop"
 }
 
+// Options returns subscriber options
 func (n *noopSubscriber) Options() SubscribeOptions {
 	return n.opts
 }
 
+// TOpic returns subscriber topic
 func (n *noopSubscriber) Topic() string {
 	return n.topic
 }
 
+// Unsubscribe unsbscribes from broker topic
 func (n *noopSubscriber) Unsubscribe(ctx context.Context) error {
 	return nil
 }

broker/options.go

@@ -9,6 +9,7 @@ import (
 	"github.com/unistack-org/micro/v3/registry"
 )
 
+// Options struct
 type Options struct {
 	Addrs  []string
 	Secure bool
@@ -27,6 +28,7 @@ type Options struct {
 	Context context.Context
 }
 
+// NewOptions create new Options
 func NewOptions(opts ...Option) Options {
 	options := Options{
 		Registry: registry.DefaultRegistry,
@@ -39,30 +41,34 @@ func NewOptions(opts ...Option) Options {
 	return options
 }
 
+// Context sets the context option
 func Context(ctx context.Context) Option {
 	return func(o *Options) {
 		o.Context = ctx
 	}
 }
 
+// PublishOptions struct
 type PublishOptions struct {
 	// Other options for implementations of the interface
 	// can be stored in a context
 	Context context.Context
 }
 
+// NewPublishOptions creates PublishOptions struct
 func NewPublishOptions(opts ...PublishOption) PublishOptions {
-	opt := PublishOptions{
+	options := PublishOptions{
 		Context: context.Background(),
 	}
 
 	for _, o := range opts {
-		o(&opt)
+		o(&options)
 	}
 
-	return opt
+	return options
 }
 
+// SubscribeOptions struct
 type SubscribeOptions struct {
 	// AutoAck ack messages if handler returns nil err
 	AutoAck bool
@@ -80,30 +86,34 @@ type SubscribeOptions struct {
 	Context context.Context
 }
 
+// Option func
 type Option func(*Options)
 
+// PublishOption func
 type PublishOption func(*PublishOptions)
 
-// PublishContext set context
+// PublishContext sets the context
 func PublishContext(ctx context.Context) PublishOption {
 	return func(o *PublishOptions) {
 		o.Context = ctx
 	}
 }
 
+// SubscribeOption func
 type SubscribeOption func(*SubscribeOptions)
 
+// NewSubscribeOptions creates new SubscribeOptions
 func NewSubscribeOptions(opts ...SubscribeOption) SubscribeOptions {
-	opt := SubscribeOptions{
+	options := SubscribeOptions{
 		AutoAck: true,
 		Context: context.Background(),
 	}
 
 	for _, o := range opts {
-		o(&opt)
+		o(&options)
 	}
 
-	return opt
+	return options
 }
 
 // Addrs sets the host addresses to be used by the broker
@@ -121,6 +131,7 @@ func Codec(c codec.Marshaler) Option {
 	}
 }
 
+// DisableAutoAck disables auto ack
 func DisableAutoAck() SubscribeOption {
 	return func(o *SubscribeOptions) {
 		o.AutoAck = false
@@ -151,6 +162,7 @@ func SubscribeErrorHandler(h Handler) SubscribeOption {
 	}
 }
 
+// Queue sets the subscribers sueue
 func Queue(name string) SubscribeOption {
 	return func(o *SubscribeOptions) {
 		o.Group = name
@@ -164,6 +176,7 @@ func SubscribeGroup(name string) SubscribeOption {
 	}
 }
 
+// Registry sets registry option
 func Registry(r registry.Registry) Option {
 	return func(o *Options) {
 		o.Registry = r

build/options.go

@@ -1,13 +1,15 @@
 package build
 
+// Options struct
 type Options struct {
 	// local path to download source
 	Path string
 }
 
+// Option func
 type Option func(o *Options)
 
-// Local path for repository
+// Path is the Local path for repository
 func Path(p string) Option {
 	return func(o *Options) {
 		o.Path = p

client/backoff.go

@@ -7,6 +7,7 @@ import (
 	"github.com/unistack-org/micro/v3/util/backoff"
 )
 
+// BackoffFunc is the backoff call func
 type BackoffFunc func(ctx context.Context, req Request, attempts int) (time.Duration, error)
 
 func exponentialBackoff(ctx context.Context, req Request, attempts int) (time.Duration, error) {

client/client.go

@@ -9,7 +9,7 @@ import (
 )
 
 var (
-	DefaultClient Client = &NoopClient{opts: NewOptions()}
+	DefaultClient Client = NewClient()
 )
 
 // Client is the interface used to make requests to services.

client/noop.go

@@ -11,7 +11,7 @@ import (
 	"github.com/unistack-org/micro/v3/metadata"
 )
 
-type NoopClient struct {
+type noopClient struct {
 	opts Options
 }
 
@@ -31,6 +31,11 @@ type noopRequest struct {
 	stream      bool
 }
 
+// NewClient returns new noop client
+func NewClient(opts ...Option) Client {
+	return &noopClient{opts: NewOptions(opts...)}
+}
+
 func (n *noopRequest) Service() string {
 	return n.service
 }
@@ -118,49 +123,41 @@ func (n *noopMessage) ContentType() string {
 	return n.opts.ContentType
 }
 
-func (n *NoopClient) Init(opts ...Option) error {
+func (n *noopClient) Init(opts ...Option) error {
 	for _, o := range opts {
 		o(&n.opts)
 	}
 	return nil
 }
 
-func (n *NoopClient) Options() Options {
+func (n *noopClient) Options() Options {
 	return n.opts
 }
 
-func (n *NoopClient) String() string {
+func (n *noopClient) String() string {
 	return "noop"
 }
 
-func (n *NoopClient) Call(ctx context.Context, req Request, rsp interface{}, opts ...CallOption) error {
+func (n *noopClient) Call(ctx context.Context, req Request, rsp interface{}, opts ...CallOption) error {
 	return nil
 }
 
-func (n *NoopClient) NewRequest(service, endpoint string, req interface{}, opts ...RequestOption) Request {
+func (n *noopClient) NewRequest(service, endpoint string, req interface{}, opts ...RequestOption) Request {
 	return &noopRequest{}
 }
 
-func (n *NoopClient) NewMessage(topic string, msg interface{}, opts ...MessageOption) Message {
-	options := MessageOptions{}
-	for _, o := range opts {
-		o(&options)
-	}
-
+func (n *noopClient) NewMessage(topic string, msg interface{}, opts ...MessageOption) Message {
+	options := NewMessageOptions(opts...)
 	return &noopMessage{topic: topic, payload: msg, opts: options}
 }
 
-func (n *NoopClient) Stream(ctx context.Context, req Request, opts ...CallOption) (Stream, error) {
+func (n *noopClient) Stream(ctx context.Context, req Request, opts ...CallOption) (Stream, error) {
 	return &noopStream{}, nil
 }
 
-func (n *NoopClient) Publish(ctx context.Context, p Message, opts ...PublishOption) error {
+func (n *noopClient) Publish(ctx context.Context, p Message, opts ...PublishOption) error {
 	var body []byte
 
-	if err := n.opts.Broker.Connect(ctx); err != nil {
-		return errors.InternalServerError("go.micro.client", err.Error())
-	}
-
 	options := NewPublishOptions(opts...)
 
 	md, ok := metadata.FromContext(ctx)
@@ -208,11 +205,3 @@ func (n *NoopClient) Publish(ctx context.Context, p Message, opts ...PublishOpti
 
 	return nil
 }
-
-func newClient(opts ...Option) Client {
-	options := NewOptions()
-	for _, o := range opts {
-		o(&options)
-	}
-	return &NoopClient{opts: options}
-}

function_test.go

@@ -8,14 +8,13 @@ import (
 	"testing"
 
 	rmemory "github.com/unistack-org/micro-registry-memory"
-	"github.com/unistack-org/micro/v3/util/test"
 )
 
 func TestFunction(t *testing.T) {
 	var wg sync.WaitGroup
 	wg.Add(1)
 
-	r := rmemory.NewRegistry(rmemory.Services(test.Data))
+	r := rmemory.NewRegistry()
 
 	// create service
 	fn := NewFunction(

metadata/metadata.go

@@ -14,9 +14,11 @@ type metadataKey struct{}
 type Metadata map[string]string
 
 var (
+	// DefaultMetadataSize used when need to init new Metadata
 	DefaultMetadataSize = 6
 )
 
+// Get returns value from metadata by key
 func (md Metadata) Get(key string) (string, bool) {
 	// fast path
 	val, ok := md[key]
@@ -27,10 +29,12 @@ func (md Metadata) Get(key string) (string, bool) {
 	return val, ok
 }
 
+// Set is used to store value in metadata
 func (md Metadata) Set(key, val string) {
 	md[textproto.CanonicalMIMEHeaderKey(key)] = val
 }
 
+// Del is used to remove value from metadata
 func (md Metadata) Del(key string) {
 	// fast path
 	if _, ok := md[key]; ok {

network/options.go

@@ -8,6 +8,7 @@ import (
 	"github.com/unistack-org/micro/v3/router"
 )
 
+// Option func
 type Option func(*Options)
 
 // Options configure network

network/transport/noop.go

@@ -1,31 +1,35 @@
 package transport
 
-type NoopTransport struct {
+type noopTransport struct {
 	opts Options
 }
 
-func (t *NoopTransport) Init(opts ...Option) error {
+func NewTransport(opts ...Option) Transport {
+	return &noopTransport{opts: NewOptions(opts...)}
+}
+
+func (t *noopTransport) Init(opts ...Option) error {
 	for _, o := range opts {
 		o(&t.opts)
 	}
 	return nil
 }
 
-func (t *NoopTransport) Options() Options {
+func (t *noopTransport) Options() Options {
 	return t.opts
 }
 
-func (t *NoopTransport) Dial(addr string, opts ...DialOption) (Client, error) {
+func (t *noopTransport) Dial(addr string, opts ...DialOption) (Client, error) {
 	options := NewDialOptions(opts...)
 	return &noopClient{opts: options}, nil
 }
 
-func (t *NoopTransport) Listen(addr string, opts ...ListenOption) (Listener, error) {
+func (t *noopTransport) Listen(addr string, opts ...ListenOption) (Listener, error) {
 	options := NewListenOptions(opts...)
 	return &noopListener{opts: options}, nil
 }
 
-func (t *NoopTransport) String() string {
+func (t *noopTransport) String() string {
 	return "noop"
 }
 

network/transport/transport.go

@@ -6,7 +6,8 @@ import (
 )
 
 var (
-	DefaultTransport Transport = &NoopTransport{opts: NewOptions()}
+	// DefaultTransport is the global default transport
+	DefaultTransport Transport = NewTransport()
 )
 
 // Transport is an interface which is used for communication between

network/tunnel/options.go

@@ -15,6 +15,7 @@ var (
 	DefaultToken = "go.micro.tunnel"
 )
 
+// Option func
 type Option func(*Options)
 
 // Options provides network configuration options
@@ -33,8 +34,10 @@ type Options struct {
 	Logger logger.Logger
 }
 
+// DialOption func
 type DialOption func(*DialOptions)
 
+// DialOptions provides dial options
 type DialOptions struct {
 	// Link specifies the link to use
 	Link string
@@ -46,8 +49,10 @@ type DialOptions struct {
 	Timeout time.Duration
 }
 
+// ListenOption func
 type ListenOption func(*ListenOptions)
 
+// ListenOptions provides listen options
 type ListenOptions struct {
 	// specify mode of the session
 	Mode Mode
@@ -55,7 +60,7 @@ type ListenOptions struct {
 	Timeout time.Duration
 }
 
-// The tunnel id
+// Id sets the tunnel id
 func Id(id string) Option {
 	return func(o *Options) {
 		o.Id = id
@@ -69,7 +74,7 @@ func Logger(l logger.Logger) Option {
 	}
 }
 
-// The tunnel address
+// Address sets the tunnel address
 func Address(a string) Option {
 	return func(o *Options) {
 		o.Address = a
@@ -97,23 +102,21 @@ func Transport(t transport.Transport) Option {
 	}
 }
 
-// Listen options
+// ListenMode option
 func ListenMode(m Mode) ListenOption {
 	return func(o *ListenOptions) {
 		o.Mode = m
 	}
 }
 
-// Timeout for reads and writes on the listener session
+// ListenTimeout for reads and writes on the listener session
 func ListenTimeout(t time.Duration) ListenOption {
 	return func(o *ListenOptions) {
 		o.Timeout = t
 	}
 }
 
-// Dial options
-
-// Dial multicast sets the multicast option to send only to those mapped
+// DialMode multicast sets the multicast option to send only to those mapped
 func DialMode(m Mode) DialOption {
 	return func(o *DialOptions) {
 		o.Mode = m
@@ -144,10 +147,14 @@ func DialWait(b bool) DialOption {
 }
 
 // DefaultOptions returns router default options
-func DefaultOptions() Options {
-	return Options{
+func NewOptions(opts ...Option) Options {
+	options := Options{
 		Id:      uuid.New().String(),
 		Address: DefaultAddress,
 		Token:   DefaultToken,
 	}
+	for _, o := range opts {
+		o(&options)
+	}
+	return options
 }

network/tunnel/transport/transport.go

@@ -93,7 +93,7 @@ func NewTransport(opts ...transport.Option) transport.Transport {
 	return t
 }
 
-// WithTransport sets the internal tunnel
+// WithTunnel sets the internal tunnel
 func WithTunnel(t tunnel.Tunnel) transport.Option {
 	return func(o *transport.Options) {
 		if o.Context == nil {

options.go

@@ -49,6 +49,7 @@ type Options struct {
 	Context context.Context
 }
 
+// NewOptions returns new Options filled with defaults and overrided by provided opts
 func NewOptions(opts ...Option) Options {
 	options := Options{
 		Context:   context.Background(),
@@ -73,6 +74,7 @@ func NewOptions(opts ...Option) Options {
 	return options
 }
 
+// Option func
 type Option func(*Options)
 
 // Broker to be used for service

registry/extractor.go

@@ -6,6 +6,7 @@ import (
 	"strings"
 )
 
+// Extract *Value from reflect.Type
 func ExtractValue(v reflect.Type, d int) *Value {
 	if d == 3 {
 		return nil
@@ -59,6 +60,7 @@ func ExtractValue(v reflect.Type, d int) *Value {
 	return arg
 }
 
+// ExtractEndpoint extract *Endpoint from reflect.Method
 func ExtractEndpoint(method reflect.Method) *Endpoint {
 	if method.PkgPath != "" {
 		return nil
@@ -104,6 +106,7 @@ func ExtractEndpoint(method reflect.Method) *Endpoint {
 	return ep
 }
 
+// ExtractSubValue exctact *Value from reflect.Type
 func ExtractSubValue(typ reflect.Type) *Value {
 	var reqType reflect.Type
 	switch typ.NumIn() {

registry/noop.go

@@ -5,55 +5,64 @@ import (
 	"fmt"
 )
 
-type NoopRegistry struct {
+type noopRegistry struct {
 	opts Options
 }
 
-func (n *NoopRegistry) Init(opts ...Option) error {
+// Init initialize registry
+func (n *noopRegistry) Init(opts ...Option) error {
 	for _, o := range opts {
 		o(&n.opts)
 	}
 	return nil
 }
 
-func (n *NoopRegistry) Options() Options {
+// Options returns options struct
+func (n *noopRegistry) Options() Options {
 	return n.opts
 }
 
-func (n *NoopRegistry) Connect(ctx context.Context) error {
+// Connect opens connection to registry
+func (n *noopRegistry) Connect(ctx context.Context) error {
 	return nil
 }
 
-func (n *NoopRegistry) Disconnect(ctx context.Context) error {
+// Disconnect close connection to registry
+func (n *noopRegistry) Disconnect(ctx context.Context) error {
 	return nil
 }
 
-func (n *NoopRegistry) Register(*Service, ...RegisterOption) error {
+// Register registers service
+func (n *noopRegistry) Register(*Service, ...RegisterOption) error {
 	return nil
 }
 
-func (n *NoopRegistry) Deregister(*Service, ...DeregisterOption) error {
+// Deregister deregisters service
+func (n *noopRegistry) Deregister(*Service, ...DeregisterOption) error {
 	return nil
 }
 
-func (n *NoopRegistry) GetService(string, ...GetOption) ([]*Service, error) {
+// GetService returns servive info
+func (n *noopRegistry) GetService(string, ...GetOption) ([]*Service, error) {
 	return []*Service{}, nil
 }
 
-func (n *NoopRegistry) ListServices(...ListOption) ([]*Service, error) {
+// ListServices listing services
+func (n *noopRegistry) ListServices(...ListOption) ([]*Service, error) {
 	return []*Service{}, nil
 }
 
-func (n *NoopRegistry) Watch(...WatchOption) (Watcher, error) {
+// Watch is used to watch for service changes
+func (n *noopRegistry) Watch(...WatchOption) (Watcher, error) {
 	return nil, fmt.Errorf("not implemented")
 }
 
-func (n *NoopRegistry) String() string {
+// String returns registry string representation
+func (n *noopRegistry) String() string {
 	return "noop"
 }
 
 // NewRegistry returns a new noop registry
 func NewRegistry(opts ...Option) Registry {
-	options := NewOptions(opts...)
-	return &NoopRegistry{opts: options}
+	return &noopRegistry{opts: NewOptions(opts...)}
 }

registry/registry.go

@@ -14,6 +14,7 @@ const (
 )
 
 var (
+	// DefaultRegistry is the global default registry
 	DefaultRegistry Registry = NewRegistry()
 	// ErrNotFound returned when GetService is called and no services found
 	ErrNotFound = errors.New("service not found")

router/router.go

@@ -6,6 +6,7 @@ import (
 )
 
 var (
+	// DefaultRouter is the global default router
 	DefaultRouter Router
 	// DefaultNetwork is default micro network
 	DefaultNetwork = "micro"

runtime/runtime.go

@@ -7,6 +7,7 @@ import (
 )
 
 var (
+	// ErrAlreadyExists error
 	ErrAlreadyExists = errors.New("already exists")
 )
 

server/context.go

@@ -6,11 +6,13 @@ import (
 
 type serverKey struct{}
 
+// FromContext returns Server from context
 func FromContext(ctx context.Context) (Server, bool) {
 	c, ok := ctx.Value(serverKey{}).(Server)
 	return c, ok
 }
 
+// NewContext stores Server to context
 func NewContext(ctx context.Context, s Server) context.Context {
 	return context.WithValue(ctx, serverKey{}, s)
 }

server/noop.go

@@ -32,7 +32,7 @@ const (
 	defaultContentType = "application/json"
 )
 
-type NoopServer struct {
+type noopServer struct {
 	h           Handler
 	opts        Options
 	rsvc        *registry.Service
@@ -45,7 +45,12 @@ type NoopServer struct {
 	sync.RWMutex
 }
 
-func (n *NoopServer) newCodec(contentType string) (codec.NewCodec, error) {
+// NewServer returns new noop server
+func NewServer(opts ...Option) Server {
+	return &noopServer{opts: NewOptions(opts...)}
+}
+
+func (n *noopServer) newCodec(contentType string) (codec.NewCodec, error) {
 	if cf, ok := n.opts.Codecs[contentType]; ok {
 		return cf, nil
 	}
@@ -55,12 +60,12 @@ func (n *NoopServer) newCodec(contentType string) (codec.NewCodec, error) {
 	return nil, fmt.Errorf("Unsupported Content-Type: %s", contentType)
 }
 
-func (n *NoopServer) Handle(handler Handler) error {
+func (n *noopServer) Handle(handler Handler) error {
 	n.h = handler
 	return nil
 }
 
-func (n *NoopServer) Subscribe(sb Subscriber) error {
+func (n *noopServer) Subscribe(sb Subscriber) error {
 	sub, ok := sb.(*subscriber)
 	if !ok {
 		return fmt.Errorf("invalid subscriber: expected *subscriber")
@@ -84,15 +89,15 @@ func (n *NoopServer) Subscribe(sb Subscriber) error {
 	return nil
 }
 
-func (n *NoopServer) NewHandler(h interface{}, opts ...HandlerOption) Handler {
+func (n *noopServer) NewHandler(h interface{}, opts ...HandlerOption) Handler {
 	return newRpcHandler(h, opts...)
 }
 
-func (n *NoopServer) NewSubscriber(topic string, sb interface{}, opts ...SubscriberOption) Subscriber {
+func (n *noopServer) NewSubscriber(topic string, sb interface{}, opts ...SubscriberOption) Subscriber {
 	return newSubscriber(topic, sb, opts...)
 }
 
-func (n *NoopServer) Init(opts ...Option) error {
+func (n *noopServer) Init(opts ...Option) error {
 	for _, o := range opts {
 		o(&n.opts)
 	}
@@ -110,15 +115,15 @@ func (n *NoopServer) Init(opts ...Option) error {
 	return nil
 }
 
-func (n *NoopServer) Options() Options {
+func (n *noopServer) Options() Options {
 	return n.opts
 }
 
-func (n *NoopServer) String() string {
+func (n *noopServer) String() string {
 	return "noop"
 }
 
-func (n *NoopServer) Register() error {
+func (n *noopServer) Register() error {
 	n.RLock()
 	rsvc := n.rsvc
 	config := n.opts
@@ -233,7 +238,7 @@ func (n *NoopServer) Register() error {
 	return nil
 }
 
-func (n *NoopServer) Deregister() error {
+func (n *noopServer) Deregister() error {
 	var err error
 
 	n.RLock()
@@ -293,7 +298,7 @@ func (n *NoopServer) Deregister() error {
 	return nil
 }
 
-func (n *NoopServer) Start() error {
+func (n *noopServer) Start() error {
 	n.RLock()
 	if n.started {
 		n.RUnlock()
@@ -433,7 +438,7 @@ func (n *NoopServer) Start() error {
 	return nil
 }
 
-func (n *NoopServer) Stop() error {
+func (n *noopServer) Stop() error {
 	n.RLock()
 	if !n.started {
 		n.RUnlock()

server/options.go

@@ -85,7 +85,7 @@ func NewOptions(opts ...Option) Options {
 	return options
 }
 
-// Server name
+// Name sets the server name option
 func Name(n string) Option {
 	return func(o *Options) {
 		o.Name = n
@@ -99,7 +99,7 @@ func Namespace(n string) Option {
 	}
 }
 
-// Logger
+// Logger sets the logger option
 func Logger(l logger.Logger) Option {
 	return func(o *Options) {
 		o.Logger = l
@@ -127,7 +127,7 @@ func Address(a string) Option {
 	}
 }
 
-// The address to advertise for discovery - host:port
+// Advertise the address to advertise for discovery - host:port
 func Advertise(a string) Option {
 	return func(o *Options) {
 		o.Advertise = a
@@ -199,14 +199,14 @@ func RegisterCheck(fn func(context.Context) error) Option {
 	}
 }
 
-// Register the service with a TTL
+// RegisterTTL registers service with a TTL
 func RegisterTTL(t time.Duration) Option {
 	return func(o *Options) {
 		o.RegisterTTL = t
 	}
 }
 
-// Register the service with at interval
+// RegisterInterval registers service with at interval
 func RegisterInterval(t time.Duration) Option {
 	return func(o *Options) {
 		o.RegisterInterval = t
@@ -250,28 +250,31 @@ func Wait(wg *sync.WaitGroup) Option {
 	}
 }
 
-// Adds a handler Wrapper to a list of options passed into the server
+// WrapHandler adds a handler Wrapper to a list of options passed into the server
 func WrapHandler(w HandlerWrapper) Option {
 	return func(o *Options) {
 		o.HdlrWrappers = append(o.HdlrWrappers, w)
 	}
 }
 
-// Adds a subscriber Wrapper to a list of options passed into the server
+// WrapSubscriber adds a subscriber Wrapper to a list of options passed into the server
 func WrapSubscriber(w SubscriberWrapper) Option {
 	return func(o *Options) {
 		o.SubWrappers = append(o.SubWrappers, w)
 	}
 }
 
+// HandlerOption func
 type HandlerOption func(*HandlerOptions)
 
+// HandlerOptions struct
 type HandlerOptions struct {
 	Internal bool
 	Metadata map[string]map[string]string
 	Context  context.Context
 }
 
+// NewHandlerOptions creates new HandlerOptions
 func NewHandlerOptions(opts ...HandlerOption) HandlerOptions {
 	options := HandlerOptions{
 		Context: context.Background(),
@@ -284,8 +287,10 @@ func NewHandlerOptions(opts ...HandlerOption) HandlerOptions {
 	return options
 }
 
+// SubscriberOption func
 type SubscriberOption func(*SubscriberOptions)
 
+// SubscriberOptions struct
 type SubscriberOptions struct {
 	// AutoAck defaults to true. When a handler returns
 	// with a nil error the message is acked.
@@ -295,6 +300,7 @@ type SubscriberOptions struct {
 	Context  context.Context
 }
 
+// NewSubscriberOptions create new SubscriberOptions
 func NewSubscriberOptions(opts ...SubscriberOption) SubscriberOptions {
 	options := SubscriberOptions{
 		AutoAck: true,
@@ -316,7 +322,7 @@ func EndpointMetadata(name string, md map[string]string) HandlerOption {
 	}
 }
 
-// Internal Handler options specifies that a handler is not advertised
+// InternalHandler options specifies that a handler is not advertised
 // to the discovery system. In the future this may also limit request
 // to the internal network or authorised user.
 func InternalHandler(b bool) HandlerOption {
@@ -325,7 +331,7 @@ func InternalHandler(b bool) HandlerOption {
 	}
 }
 
-// Internal Subscriber options specifies that a subscriber is not advertised
+// InternalSubscriber options specifies that a subscriber is not advertised
 // to the discovery system.
 func InternalSubscriber(b bool) SubscriberOption {
 	return func(o *SubscriberOptions) {
@@ -341,7 +347,7 @@ func DisableAutoAck() SubscriberOption {
 	}
 }
 
-// Shared queue name distributed messages across subscribers
+// SubscriberQueue sets the shared queue name distributed messages across subscribers
 func SubscriberQueue(n string) SubscriberOption {
 	return func(o *SubscriberOptions) {
 		o.Queue = n

server/registry.go

@@ -52,6 +52,7 @@ var (
 	}
 )
 
+// NewRegistryService returns *registry.Service from Server
 func NewRegistryService(s Server) (*registry.Service, error) {
 	opts := s.Options()
 

server/server.go

@@ -11,7 +11,7 @@ import (
 )
 
 var (
-	DefaultServer Server = &NoopServer{opts: NewOptions()}
+	DefaultServer Server = NewServer()
 )
 
 // Server is a simple micro server abstraction

server/subscriber.go

@@ -59,6 +59,7 @@ func isExportedOrBuiltinType(t reflect.Type) bool {
 	return isExported(t.Name()) || t.PkgPath() == ""
 }
 
+// ValidateSubscriber func
 func ValidateSubscriber(sub Subscriber) error {
 	typ := reflect.TypeOf(sub.Subscriber())
 	var argType reflect.Type
@@ -184,7 +185,7 @@ func newSubscriber(topic string, sub interface{}, opts ...SubscriberOption) Subs
 	}
 }
 
-func (n *NoopServer) createSubHandler(sb *subscriber, opts Options) broker.Handler {
+func (n *noopServer) createSubHandler(sb *subscriber, opts Options) broker.Handler {
 	return func(p broker.Event) (err error) {
 		defer func() {
 			if r := recover(); r != nil {

store/noop.go

@@ -2,45 +2,58 @@ package store
 
 import "context"
 
-type NoopStore struct {
+type noopStore struct {
 	opts Options
 }
 
-func (n *NoopStore) Init(opts ...Option) error {
+func NewStore(opts ...Option) Store {
+	return &noopStore{opts: NewOptions(opts...)}
+}
+
+// Init initialize store
+func (n *noopStore) Init(opts ...Option) error {
 	for _, o := range opts {
 		o(&n.opts)
 	}
 	return nil
 }
 
-func (n *NoopStore) Options() Options {
+// Options returns Options struct
+func (n *noopStore) Options() Options {
 	return n.opts
 }
 
-func (n *NoopStore) String() string {
+// String returns string representation
+func (n *noopStore) String() string {
 	return "noop"
 }
 
-func (n *NoopStore) Read(ctx context.Context, key string, opts ...ReadOption) ([]*Record, error) {
+// Read reads store value by key
+func (n *noopStore) Read(ctx context.Context, key string, opts ...ReadOption) ([]*Record, error) {
 	return []*Record{}, nil
 }
 
-func (n *NoopStore) Write(ctx context.Context, r *Record, opts ...WriteOption) error {
+// Write writes store record
+func (n *noopStore) Write(ctx context.Context, r *Record, opts ...WriteOption) error {
 	return nil
 }
 
-func (n *NoopStore) Delete(ctx context.Context, key string, opts ...DeleteOption) error {
+// Delete removes store value by key
+func (n *noopStore) Delete(ctx context.Context, key string, opts ...DeleteOption) error {
 	return nil
 }
 
-func (n *NoopStore) List(ctx context.Context, opts ...ListOption) ([]string, error) {
+// List lists store
+func (n *noopStore) List(ctx context.Context, opts ...ListOption) ([]string, error) {
 	return []string{}, nil
 }
 
-func (n *NoopStore) Connect(ctx context.Context) error {
+// Connect connects to store
+func (n *noopStore) Connect(ctx context.Context) error {
 	return nil
 }
 
-func (n *NoopStore) Disconnect(ctx context.Context) error {
+// Disconnect disconnects from store
+func (n *noopStore) Disconnect(ctx context.Context) error {
 	return nil
 }

store/store.go

@@ -10,14 +10,16 @@ import (
 
 var (
 	// ErrNotFound is returned when a key doesn't exist
-	ErrNotFound        = errors.New("not found")
-	DefaultStore Store = &NoopStore{opts: NewOptions()}
+	ErrNotFound = errors.New("not found")
+	// DefaultStore is the global default store
+	DefaultStore Store = NewStore()
 )
 
 // Store is a data storage interface
 type Store interface {
 	// Init initialises the store. It must perform any required setup on the backing storage implementation and check that it is ready for use, returning any errors.
 	Init(opts ...Option) error
+	// Connect is used when store needs to be connected
 	Connect(ctx context.Context) error
 	// Options allows you to view the current options.
 	Options() Options

tracer/options.go

@@ -1,10 +1,12 @@
 package tracer
 
+// Options struct
 type Options struct {
 	// Size is the size of ring buffer
 	Size int
 }
 
+// Option func
 type Option func(o *Options)
 
 type ReadOptions struct {
@@ -12,9 +14,10 @@ type ReadOptions struct {
 	Trace string
 }
 
+// ReadOption func
 type ReadOption func(o *ReadOptions)
 
-// Read the given trace
+// ReadTracer read the given trace
 func ReadTrace(t string) ReadOption {
 	return func(o *ReadOptions) {
 		o.Trace = t

util/http/options.go

@@ -2,12 +2,15 @@ package http
 
 import "github.com/unistack-org/micro/v3/router"
 
+// Options struct
 type Options struct {
 	Router router.Router
 }
 
+// Option func
 type Option func(*Options)
 
+// WithRouter sets the router.Router option
 func WithRouter(r router.Router) Option {
 	return func(o *Options) {
 		o.Router = r

util/signal/signal.go

@@ -1,13 +0,0 @@
-package signal
-
-import (
-	"os"
-	"syscall"
-)
-
-// ShutDownSignals returns all the signals that are being watched for to shut down services.
-func Shutdown() []os.Signal {
-	return []os.Signal{
-		syscall.SIGTERM, syscall.SIGINT, syscall.SIGQUIT, syscall.SIGKILL,
-	}
-}

util/test/test.go

@@ -1,47 +0,0 @@
-package test
-
-import (
-	"github.com/unistack-org/micro/v3/registry"
-)
-
-var (
-	// mock registry data
-	Data = map[string][]*registry.Service{
-		"foo": {
-			{
-				Name:    "foo",
-				Version: "1.0.0",
-				Nodes: []*registry.Node{
-					{
-						Id:      "foo-1.0.0-123",
-						Address: "localhost:9999",
-					},
-					{
-						Id:      "foo-1.0.0-321",
-						Address: "localhost:9999",
-					},
-				},
-			},
-			{
-				Name:    "foo",
-				Version: "1.0.1",
-				Nodes: []*registry.Node{
-					{
-						Id:      "foo-1.0.1-321",
-						Address: "localhost:6666",
-					},
-				},
-			},
-			{
-				Name:    "foo",
-				Version: "1.0.3",
-				Nodes: []*registry.Node{
-					{
-						Id:      "foo-1.0.3-345",
-						Address: "localhost:8888",
-					},
-				},
-			},
-		},
-	}
-)