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broker_options.go
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broker_options.go
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package nats_broker
import (
"fmt"
"git.golaxy.org/core"
"git.golaxy.org/core/util/option"
"github.com/nats-io/nats.go"
"net"
"strings"
)
// Option is a struct used for setting options.
type Option struct{}
// BrokerOptions is a struct that holds various configuration options for the NATS broker.
type BrokerOptions struct {
NatsClient *nats.Conn
TopicPrefix string
QueuePrefix string
FastAddresses []string
FastUsername string
FastPassword string
}
// Default sets default values for BrokerOptions.
func (Option) Default() option.Setting[BrokerOptions] {
return func(options *BrokerOptions) {
Option{}.NatsClient(nil)(options)
Option{}.TopicPrefix("")(options)
Option{}.QueuePrefix("")(options)
Option{}.FastAuth("", "")(options)
Option{}.FastAddresses("127.0.0.1:4222")(options)
}
}
// NatsClient sets the NATS client in BrokerOptions.
func (Option) NatsClient(cli *nats.Conn) option.Setting[BrokerOptions] {
return func(o *BrokerOptions) {
o.NatsClient = cli
}
}
// TopicPrefix sets the topic prefix in BrokerOptions.
func (Option) TopicPrefix(prefix string) option.Setting[BrokerOptions] {
return func(o *BrokerOptions) {
if prefix != "" && !strings.HasSuffix(prefix, ".") {
prefix += "."
}
o.TopicPrefix = prefix
}
}
// QueuePrefix sets the queue prefix in BrokerOptions.
func (Option) QueuePrefix(prefix string) option.Setting[BrokerOptions] {
return func(o *BrokerOptions) {
if prefix != "" && !strings.HasSuffix(prefix, ".") {
prefix += "."
}
o.QueuePrefix = prefix
}
}
// FastAuth sets the authentication credentials in BrokerOptions. If NatsClient is nil, these credentials are used for authentication.
func (Option) FastAuth(username, password string) option.Setting[BrokerOptions] {
return func(options *BrokerOptions) {
options.FastUsername = username
options.FastPassword = password
}
}
// FastAddresses sets the addresses in BrokerOptions. If NatsClient is nil, these addresses are used as the connection addresses.
func (Option) FastAddresses(addrs ...string) option.Setting[BrokerOptions] {
return func(options *BrokerOptions) {
for _, addr := range addrs {
if _, _, err := net.SplitHostPort(addr); err != nil {
panic(fmt.Errorf("%w: %w", core.ErrArgs, err))
}
}
options.FastAddresses = addrs
}
}