micro/broker/options.go

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package broker
import (
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"context"
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"crypto/tls"
"github.com/micro/go-micro/v2/codec"
"github.com/micro/go-micro/v2/registry"
)
type Options struct {
Addrs []string
Secure bool
Codec codec.Marshaler
// Handler executed when error happens in broker mesage
// processing
ErrorHandler Handler
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TLSConfig *tls.Config
// Registry used for clustering
Registry registry.Registry
// Other options for implementations of the interface
// can be stored in a context
Context context.Context
}
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type PublishOptions struct {
// Other options for implementations of the interface
// can be stored in a context
Context context.Context
}
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type SubscribeOptions struct {
// AutoAck defaults to true. When a handler returns
// with a nil error the message is acked.
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AutoAck bool
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// Subscribers with the same queue name
// will create a shared subscription where each
// receives a subset of messages.
Queue string
// Other options for implementations of the interface
// can be stored in a context
Context context.Context
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}
type Option func(*Options)
type PublishOption func(*PublishOptions)
// PublishContext set context
func PublishContext(ctx context.Context) PublishOption {
return func(o *PublishOptions) {
o.Context = ctx
}
}
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type SubscribeOption func(*SubscribeOptions)
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func NewSubscribeOptions(opts ...SubscribeOption) SubscribeOptions {
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opt := SubscribeOptions{
AutoAck: true,
}
for _, o := range opts {
o(&opt)
}
return opt
}
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// Addrs sets the host addresses to be used by the broker
func Addrs(addrs ...string) Option {
return func(o *Options) {
o.Addrs = addrs
}
}
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// Codec sets the codec used for encoding/decoding used where
// a broker does not support headers
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func Codec(c codec.Marshaler) Option {
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return func(o *Options) {
o.Codec = c
}
}
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// DisableAutoAck will disable auto acking of messages
// after they have been handled.
func DisableAutoAck() SubscribeOption {
return func(o *SubscribeOptions) {
o.AutoAck = false
}
}
// ErrorHandler will catch all broker errors that cant be handled
// in normal way, for example Codec errors
func ErrorHandler(h Handler) Option {
return func(o *Options) {
o.ErrorHandler = h
}
}
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// Queue sets the name of the queue to share messages on
func Queue(name string) SubscribeOption {
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return func(o *SubscribeOptions) {
o.Queue = name
}
}
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func Registry(r registry.Registry) Option {
return func(o *Options) {
o.Registry = r
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}
}
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// Secure communication with the broker
func Secure(b bool) Option {
return func(o *Options) {
o.Secure = b
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}
}
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// Specify TLS Config
func TLSConfig(t *tls.Config) Option {
return func(o *Options) {
o.TLSConfig = t
}
}
// SubscribeContext set context
func SubscribeContext(ctx context.Context) SubscribeOption {
return func(o *SubscribeOptions) {
o.Context = ctx
}
}