move options to dedicated package

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

broker/options.go

@@ -9,29 +9,11 @@ import (
 	"go.unistack.org/micro/v4/logger"
 	"go.unistack.org/micro/v4/metadata"
 	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/options"
 	"go.unistack.org/micro/v4/register"
 	"go.unistack.org/micro/v4/tracer"
 )
 
-var (
-	// PublishMessageDurationSeconds specifies meter metric name
-	PublishMessageDurationSeconds = "publish_message_duration_seconds"
-	// PublishMessageLatencyMicroseconds specifies meter metric name
-	PublishMessageLatencyMicroseconds = "publish_message_latency_microseconds"
-	// PublishMessageTotal specifies meter metric name
-	PublishMessageTotal = "publish_message_total"
-	// PublishMessageInflight specifies meter metric name
-	PublishMessageInflight = "publish_message_inflight"
-	// SubscribeMessageDurationSeconds specifies meter metric name
-	SubscribeMessageDurationSeconds = "subscribe_message_duration_seconds"
-	// SubscribeMessageLatencyMicroseconds specifies meter metric name
-	SubscribeMessageLatencyMicroseconds = "subscribe_message_latency_microseconds"
-	// SubscribeMessageTotal specifies meter metric name
-	SubscribeMessageTotal = "subscribe_message_total"
-	// SubscribeMessageInflight specifies meter metric name
-	SubscribeMessageInflight = "subscribe_message_inflight"
-)
-
 // Options struct
 type Options struct {
 	// Tracer used for tracing
@@ -48,19 +30,16 @@ type Options struct {
 	Context context.Context
 	// TLSConfig holds tls.TLSConfig options
 	TLSConfig *tls.Config
-	// ErrorHandler used when broker can't unmarshal incoming message
-	ErrorHandler func(Message)
+	// ErrorHandler used when broker have error while processing message
+	ErrorHandler interface{}
 	// Name holds the broker name
 	Name string
-	// Addrs holds the broker address
-	Addrs []string
+	// Address holds the broker address
+	Address []string
 }
 
-// Option func
-type Option func(*Options)
-
 // NewOptions create new Options
-func NewOptions(opts ...Option) Options {
+func NewOptions(opts ...options.Option) Options {
 	options := Options{
 		Register: register.DefaultRegister,
 		Logger:   logger.DefaultLogger,
@@ -75,49 +54,22 @@ 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
-	}
-}
-
-// MessageOption func
-type MessageOption func(*MessageOptions)
-
-// MessageOptions struct
-type MessageOptions struct {
-	Metadata    metadata.Metadata
-	ContentType string
-}
-
-// MessageMetadata pass additional message metadata
-func MessageMetadata(md metadata.Metadata) MessageOption {
-	return func(o *MessageOptions) {
-		o.Metadata = md
-	}
-}
-
-// MessageContentType pass ContentType for message data
-func MessageContentType(ct string) MessageOption {
-	return func(o *MessageOptions) {
-		o.ContentType = ct
-	}
-}
-
-// PublishOption func
-type PublishOption func(*PublishOptions)
-
 // PublishOptions struct
 type PublishOptions struct {
 	// Context holds external options
 	Context context.Context
 	// BodyOnly flag says the message contains raw body bytes
 	BodyOnly bool
+	// Message metadata usually passed as message headers
+	Metadata metadata.Metadata
+	// Content-Type of message for marshal
+	ContentType string
+	// Topic destination
+	Topic string
 }
 
 // NewPublishOptions creates PublishOptions struct
-func NewPublishOptions(opts ...PublishOption) PublishOptions {
+func NewPublishOptions(opts ...options.Option) PublishOptions {
 	options := PublishOptions{
 		Context: context.Background(),
 	}
@@ -127,12 +79,19 @@ func NewPublishOptions(opts ...PublishOption) PublishOptions {
 	return options
 }
 
+// PublishTopic pass topic for messages
+func PublishTopic(t string) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, t, ".Topic")
+	}
+}
+
 // SubscribeOptions struct
 type SubscribeOptions struct {
 	// Context holds external options
 	Context context.Context
-	// ErrorHandler used when broker can't unmarshal incoming message
-	ErrorHandler func(Message)
+	// ErrorHandler used when broker have error while processing message
+	ErrorHandler interface{}
 	// QueueGroup holds consumer group
 	QueueGroup string
 	// AutoAck flag specifies auto ack of incoming message when no error happens
@@ -145,99 +104,16 @@ type SubscribeOptions struct {
 	BatchWait time.Duration
 }
 
-// PublishBodyOnly publish only body of the message
-func PublishBodyOnly(b bool) PublishOption {
-	return func(o *PublishOptions) {
-		o.BodyOnly = b
-	}
-}
-
-// PublishContext sets the context
-func PublishContext(ctx context.Context) PublishOption {
-	return func(o *PublishOptions) {
-		o.Context = ctx
-	}
-}
-
-// Addrs sets the host addresses to be used by the broker
-func Addrs(addrs ...string) Option {
-	return func(o *Options) {
-		o.Addrs = addrs
-	}
-}
-
-// Codec sets the codec used for encoding/decoding used where
-// a broker does not support headers
-// Codec to be used to encode/decode requests for a given content type
-func Codec(contentType string, c codec.Codec) Option {
-	return func(o *Options) {
-		o.Codecs[contentType] = c
-	}
-}
-
 // ErrorHandler will catch all broker errors that cant be handled
 // in normal way, for example Codec errors
-func ErrorHandler(h func(Message)) Option {
-	return func(o *Options) {
-		o.ErrorHandler = h
+func ErrorHandler(h interface{}) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, h, ".ErrorHandler")
 	}
 }
 
-// SubscribeErrorHandler will catch all broker errors that cant be handled
-// in normal way, for example Codec errors
-func SubscribeErrorHandler(h func(Message)) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.ErrorHandler = h
-	}
-}
-
-// Register sets register option
-func Register(r register.Register) Option {
-	return func(o *Options) {
-		o.Register = r
-	}
-}
-
-// TLSConfig sets the TLS Config
-func TLSConfig(t *tls.Config) Option {
-	return func(o *Options) {
-		o.TLSConfig = t
-	}
-}
-
-// Logger sets the logger
-func Logger(l logger.Logger) Option {
-	return func(o *Options) {
-		o.Logger = l
-	}
-}
-
-// Tracer to be used for tracing
-func Tracer(t tracer.Tracer) Option {
-	return func(o *Options) {
-		o.Tracer = t
-	}
-}
-
-// Meter sets the meter
-func Meter(m meter.Meter) Option {
-	return func(o *Options) {
-		o.Meter = m
-	}
-}
-
-// Name sets the name
-func Name(n string) Option {
-	return func(o *Options) {
-		o.Name = n
-	}
-}
-
-// SubscribeOption func signature
-type SubscribeOption func(*SubscribeOptions)
-
 // NewSubscribeOptions creates new SubscribeOptions
-func NewSubscribeOptions(opts ...SubscribeOption) SubscribeOptions {
+func NewSubscribeOptions(opts ...options.Option) SubscribeOptions {
 	options := SubscribeOptions{
 		AutoAck: true,
 		Context: context.Background(),
@@ -248,52 +124,38 @@ func NewSubscribeOptions(opts ...SubscribeOption) SubscribeOptions {
 	return options
 }
 
-// SubscribeContext set context
-func SubscribeContext(ctx context.Context) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.Context = ctx
-	}
-}
-
 // SubscribeAutoAck contol auto acking of messages
 // after they have been handled.
-func SubscribeAutoAck(b bool) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.AutoAck = b
+func SubscribeAutoAck(b bool) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, b, ".AutoAck")
 	}
 }
 
-// SubscribeBodyOnly consumes only body of the message
-func SubscribeBodyOnly(b bool) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.BodyOnly = b
+// BodyOnly transfer only body without
+func BodyOnly(b bool) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, b, ".BodyOnly")
 	}
 }
 
 // SubscribeBatchSize specifies max batch size
-func SubscribeBatchSize(n int) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.BatchSize = n
+func SubscribeBatchSize(n int) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, n, ".BatchSize")
 	}
 }
 
 // SubscribeBatchWait specifies max batch wait time
-func SubscribeBatchWait(td time.Duration) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.BatchWait = td
+func SubscribeBatchWait(td time.Duration) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, td, ".BatchWait")
 	}
 }
 
 // SubscribeQueueGroup sets the shared queue name distributed messages across subscribers
-func SubscribeQueueGroup(n string) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.QueueGroup = n
-	}
-}
-
-// SubscribeAutoAck control auto ack processing for handler
-func SubscribeAuthAck(b bool) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.AutoAck = b
+func SubscribeQueueGroup(n string) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, n, ".QueueGroup")
 	}
 }