nats

Documentation

Overview

Package nats provides a NATS registry using broadcast queries

Index

• Variables
• func NewRegistry(opts ...registry.Option) registry.Registry
• func Options(nopts nats.Options) registry.Option
• func QueryTopic(s string) registry.Option
• func Quorum(n int) registry.Option
• func RegisterAction(s string) registry.Option
• func WatchTopic(s string) registry.Option

Variables

var (
	DefaultQuorum = 0
)

Functions

func NewRegistry

func NewRegistry(opts ...registry.Option) registry.Registry

func Options

func Options(nopts nats.Options) registry.Option

Options allow to inject a nats.Options struct for configuring the nats connection.

func QueryTopic

func QueryTopic(s string) registry.Option

QueryTopic allows to set a custom nats topic on which service registries query (survey) other services. All registries listen on this topic and then respond to the query message.

func Quorum

func Quorum(n int) registry.Option

func RegisterAction

func RegisterAction(s string) registry.Option

RegisterAction allows to set the action to use when registering to nats. As of now there are three different options: - "create" (default) only registers if there is noone already registered under the same key. - "update" only updates the registration if it already exists. - "put" creates or updates a registration

func WatchTopic

func WatchTopic(s string) registry.Option

WatchTopic allows to set a custom nats topic on which registries broadcast changes (e.g. when services are added, updated or removed). Since we don't have a central registry service, each service typically broadcasts in a determined frequency on this topic.