options.go

// Copyright 2020 Asim Aslam
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Original source: github.com/micro/go-micro/v3/broker/options.go

package broker

import (
	"context"
	"crypto/tls"

	"github.com/2637309949/micro/v3/service/registry"
	"github.com/2637309949/micro/v3/util/codec"
)

type Options struct {
	Addrs  []string
	Secure bool
	Codec  codec.Marshaler

	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
}

type PublishOptions struct {
	// Other options for implementations of the interface
	// can be stored in a context
	Context context.Context
}

type SubscribeOptions struct {
	// Handler executed when errors occur processing messages
	ErrorHandler ErrorHandler

	// 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
}

type Option func(*Options)

type PublishOption func(*PublishOptions)

// PublishContext set context
func PublishContext(ctx context.Context) PublishOption {
	return func(o *PublishOptions) {
		o.Context = ctx
	}
}

type SubscribeOption func(*SubscribeOptions)

func NewSubscribeOptions(opts ...SubscribeOption) SubscribeOptions {
	opt := SubscribeOptions{}

	for _, o := range opts {
		o(&opt)
	}

	return opt
}

// 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
func Codec(c codec.Marshaler) Option {
	return func(o *Options) {
		o.Codec = c
	}
}

// ErrorHandler will catch all broker errors that cant be handled
// in normal way, for example Codec errors
func HandleError(h ErrorHandler) SubscribeOption {
	return func(o *SubscribeOptions) {
		o.ErrorHandler = h
	}
}

// Queue sets the name of the queue to share messages on
func Queue(name string) SubscribeOption {
	return func(o *SubscribeOptions) {
		o.Queue = name
	}
}

func Registry(r registry.Registry) Option {
	return func(o *Options) {
		o.Registry = r
	}
}

// Secure communication with the broker
func Secure(b bool) Option {
	return func(o *Options) {
		o.Secure = b
	}
}

// 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
	}
}