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handler.go
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handler.go
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// MIT License
//
// Copyright (c) 2020 Lack
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package server
import (
"context"
openapipb "github.com/lack-io/vine/proto/apis/openapi"
)
type HandlerOption func(*HandlerOptions)
type HandlerOptions struct {
Internal bool
Metadata map[string]map[string]string
OpenAPI *openapipb.OpenAPI
}
type SubscriberOption func(*SubscriberOptions)
type SubscriberOptions struct {
// AutoAck defaults to true. When a handler returns
// with a nil error the message is acked.
AutoAck bool
Queue string
Internal bool
Context context.Context
}
// EndpointMetadata is a Handler option that allows metadata to be added to
// individual endpoints.
func EndpointMetadata(name string, md map[string]string) HandlerOption {
return func(o *HandlerOptions) {
o.Metadata[name] = md
}
}
// OpenAPIHandler is a Handler option that allows swagger openapi to be added to
// individual endpoints.
func OpenAPIHandler(openAPI *openapipb.OpenAPI) HandlerOption {
return func(o *HandlerOptions) {
o.OpenAPI = openAPI
}
}
// 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 {
return func(o *HandlerOptions) {
o.Internal = b
}
}
// InternalSubscriber options specifies that a subscriber is not advertised
// to the discovery system.
func InternalSubscriber(b bool) SubscriberOption {
return func(o *SubscriberOptions) {
o.Internal = b
}
}
func NewSubscriberOptions(opts ...SubscriberOption) SubscriberOptions {
opt := SubscriberOptions{
AutoAck: true,
Context: context.Background(),
}
for _, o := range opts {
o(&opt)
}
return opt
}
// DisableAutoAck will disable auto acking of messages
// after they have been handled.
func DisableAutoAck() SubscriberOption {
return func(o *SubscriberOptions) {
o.AutoAck = false
}
}
// SubscriberQueue Shared queue name distributed messages across subscribers
func SubscriberQueue(n string) SubscriberOption {
return func(o *SubscriberOptions) {
o.Queue = n
}
}
// SubscriberContext set context options to allow broker SubscriberOption passed
func SubscriberContext(ctx context.Context) SubscriberOption {
return func(o *SubscriberOptions) {
o.Context = ctx
}
}