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Package micro is a pluggable framework for microservices



This section is empty.


var (
	HeaderPrefix = "Micro-"


func NewContext

func NewContext(ctx context.Context, s Service) context.Context

NewContext returns a new Context with the Service embedded within it.

func RegisterHandler

func RegisterHandler(s server.Server, h interface{}, opts ...server.HandlerOption) error

RegisterHandler is syntactic sugar for registering a handler

func RegisterSubscriber

func RegisterSubscriber(topic string, s server.Server, h interface{}, opts ...server.SubscriberOption) error

RegisterSubscriber is syntactic sugar for registering a subscriber


type Event

type Event interface {
	// Publish publishes a message to the event topic
	Publish(ctx context.Context, msg interface{}, opts ...client.PublishOption) error

Event is used to publish messages to a topic

func NewEvent

func NewEvent(topic string, c client.Client) Event

NewEvent creates a new event publisher

type Option

type Option func(*Options)

func Address

func Address(addr string) Option

Address sets the address of the server

func AfterStart

func AfterStart(fn func() error) Option

AfterStart run funcs after service starts

func AfterStop

func AfterStop(fn func() error) Option

AfterStop run funcs after service stops

func BeforeStart

func BeforeStart(fn func() error) Option

BeforeStart run funcs before service starts

func BeforeStop

func BeforeStop(fn func() error) Option

BeforeStop run funcs before service stops

func Broker

func Broker(b broker.Broker) Option

Broker to be used for service

func Context

func Context(ctx context.Context) Option

Context specifies a context for the service. Can be used to signal shutdown of the service and for extra option values.

func HandleSignal

func HandleSignal(b bool) Option

HandleSignal toggles automatic installation of the signal handler that traps TERM, INT, and QUIT. Users of this feature to disable the signal handler, should control liveness of the service through the context.

func Metadata

func Metadata(md map[string]string) Option

Metadata associated with the service

func Name

func Name(n string) Option

Name of the service

func Profile

func Profile(p profile.Profile) Option

Profile to be used for debug profile

func RegisterInterval

func RegisterInterval(t time.Duration) Option

RegisterInterval specifies the interval on which to re-register

func RegisterTTL

func RegisterTTL(t time.Duration) Option

RegisterTTL specifies the TTL to use when registering the service

func Registry

func Registry(r registry.Registry) Option

Registry sets the registry for the service and the underlying components

func Selector

func Selector(s selector.Selector) Option

Selector sets the selector for the service client

func Tracer

func Tracer(t trace.Tracer) Option

Tracer sets the tracer for the service

func Transport

func Transport(t transport.Transport) Option

Transport sets the transport for the service and the underlying components

func Version

func Version(v string) Option

Version of the service

func WrapCall

func WrapCall(w ...client.CallWrapper) Option

WrapCall is a convenience method for wrapping a Client CallFunc

func WrapClient

func WrapClient(w ...client.Wrapper) Option

WrapClient is a convenience method for wrapping a Client with some middleware component. A list of wrappers can be provided. Wrappers are applied in reverse order so the last is executed first.

func WrapHandler

func WrapHandler(w ...server.HandlerWrapper) Option

WrapHandler adds a handler Wrapper to a list of options passed into the server

func WrapSubscriber

func WrapSubscriber(w ...server.SubscriberWrapper) Option

WrapSubscriber adds a subscriber Wrapper to a list of options passed into the server

type Options

type Options struct {
	Broker    broker.Broker
	Client    client.Client
	Server    server.Server
	Registry  registry.Registry
	Transport transport.Transport
	Profile   profile.Profile

	// Before and After funcs
	BeforeStart []func() error
	BeforeStop  []func() error
	AfterStart  []func() error
	AfterStop   []func() error

	// Other options for implementations of the interface
	// can be stored in a context
	Context context.Context

	Signal bool

Options for micro service

type Service

type Service interface {
	// The service name
	Name() string
	// Init initialises options
	// Options returns the current options
	Options() Options
	// Client is used to call services
	Client() client.Client
	// Server is for handling requests and events
	Server() server.Server
	// Run the service
	Run() error
	// The service implementation
	String() string

Service is an interface that wraps the lower level libraries within go-micro. Its a convenience method for building and initialising services.

func FromContext

func FromContext(ctx context.Context) (Service, bool)

FromContext retrieves a Service from the Context.

func NewService

func NewService(opts ...Option) Service

NewService creates and returns a new Service based on the packages within.


Path Synopsis
api/handler Package handler provides http handlers
api/handler/api Package api provides an http-rpc handler which provides the entire http request over rpc
api/handler/event Package event provides a handler which publishes an event
api/handler/http Package http is a http reverse proxy handler
api/handler/rpc Package rpc is a go-micro rpc handler.
api/handler/web Package web contains the web handler including websocket support
api/resolver Package resolver resolves a http request to an endpoint
api/resolver/grpc Package grpc resolves a grpc service like /greeter.Say/Hello to greeter service
api/resolver/host Package host resolves using http host
api/resolver/path Package path resolves using http path
api/resolver/vpath Package vpath resolves using http path and recognised versioned urls
api/router Package router provides api service routing
api/router/registry Package registry provides a dynamic api service router
api/server Package server provides an API gateway server which handles inbound requests
api/server/http Package http provides a http server with features; acme, cors, etc
broker Package broker is an interface used for asynchronous messaging
broker/http Package http provides a http based message broker
broker/memory Package memory provides a memory broker
broker/nats Package nats provides a NATS broker
broker/service Package service provides the broker service client
client Package client is an interface for an RPC client
client/selector Package selector is a way to pick a list of service nodes
client/selector/dns Package dns provides a dns SRV selector
client/selector/registry Package registry uses the go-micro registry for selection
client/selector/router Package router is a network/router selector
client/selector/static Package static provides a static resolver which returns the name/ip passed in without any change
codec Package codec is an interface for encoding messages
codec/bytes Package bytes provides a bytes codec which does not encode or decode anything
codec/grpc Package grpc provides a grpc codec
codec/json Package json provides a json codec
codec/jsonrpc Package jsonrpc provides a json-rpc 1.0 codec
codec/proto Package proto provides a proto codec
codec/protorpc Protorpc provides a net/rpc proto-rpc codec.
codec/text Package text reads any text/* content-type
config Package config is an interface for dynamic configuration.
config/encoder Package encoder handles source encoding formats
config/loader package loader manages loading from multiple sources
config/reader Package reader parses change sets and provides config values
config/secrets Package secrets is an interface for encrypting and decrypting secrets
config/secrets/box Package box is an asymmetric implementation of config/secrets using nacl/box
config/secrets/secretbox Package secretbox is a config/secrets implementation that uses nacl/secretbox to do symmetric encryption / verification
config/source Package source is the interface for sources
config/source/file Package file is a file source.
config/source/memory Package memory is a memory source
debug Package debug provides micro debug packages
debug/log Package log provides debug logging
debug/log/kubernetes Package kubernetes is a logger implementing (
debug/log/memory Package memory provides an in memory log buffer
debug/profile Package profile is for profilers
debug/profile/http Package http enables the http profiler
debug/profile/pprof Package pprof provides a pprof profiler
debug/service Package service provides the service log
debug/service/handler Package handler implements service debug handler embedded in go-micro services
debug/stats Package stats provides runtime stats
debug/trace Package trace provides an interface for distributed tracing
errors Package errors provides a way to return detailed information for an RPC request error.
logger Package log provides a log interface
metadata Package metadata is a way of defining message headers
registry Package registry is an interface for service discovery
registry/cache Package cache provides a registry cache
registry/etcd Package etcd provides an etcd service registry
registry/mdns Package mdns provides a multicast dns registry
registry/memory Package memory provides an in-memory registry
registry/service Package service uses the registry service
router Package router provides a network routing control plane
server Package server is an interface for a micro server
transport Package transport is an interface for synchronous connection based communication
transport/grpc Package grpc provides a grpc transport
transport/memory Package memory is an in-memory transport
transport/quic Package quic provides a QUIC based transport
util/backoff Package backoff provides backoff functionality
util/io Package io is for io management
util/jitter Package jitter provides a random jitter
util/kubernetes/client Package client provides an implementation of a restricted subset of kubernetes API client
util/log Package log is a global internal logger DEPRECATED: this is frozen package, use
util/pool Package pool is a connection pool
util/proto Package proto contains utility functions for working with protobufs
util/ring Package ring provides a simple ring buffer for storing local data
util/socket Package socket provides a pseudo socket
util/stream Package stream encapsulates streams within streams
web Package web provides web based micro services