micro/server/options.go
2020-04-03 12:33:19 +01:00

272 lines
5.6 KiB
Go

package server
import (
"context"
"crypto/tls"
"sync"
"time"
"github.com/micro/go-micro/v2/auth"
"github.com/micro/go-micro/v2/broker"
"github.com/micro/go-micro/v2/codec"
"github.com/micro/go-micro/v2/debug/trace"
"github.com/micro/go-micro/v2/registry"
"github.com/micro/go-micro/v2/transport"
)
type Options struct {
Codecs map[string]codec.NewCodec
Broker broker.Broker
Registry registry.Registry
Tracer trace.Tracer
Auth auth.Auth
Transport transport.Transport
Metadata map[string]string
Name string
Address string
Advertise string
Id string
Version string
HdlrWrappers []HandlerWrapper
SubWrappers []SubscriberWrapper
// RegisterCheck runs a check function before registering the service
RegisterCheck func(context.Context) error
// The register expiry time
RegisterTTL time.Duration
// The interval on which to register
RegisterInterval time.Duration
// The router for requests
Router Router
// TLSConfig specifies tls.Config for secure serving
TLSConfig *tls.Config
// Other options for implementations of the interface
// can be stored in a context
Context context.Context
}
func newOptions(opt ...Option) Options {
opts := Options{
Codecs: make(map[string]codec.NewCodec),
Metadata: map[string]string{},
RegisterInterval: DefaultRegisterInterval,
RegisterTTL: DefaultRegisterTTL,
}
for _, o := range opt {
o(&opts)
}
if opts.Auth == nil {
opts.Auth = auth.DefaultAuth
}
if opts.Broker == nil {
opts.Broker = broker.DefaultBroker
}
if opts.Registry == nil {
opts.Registry = registry.DefaultRegistry
}
if opts.Transport == nil {
opts.Transport = transport.DefaultTransport
}
if opts.RegisterCheck == nil {
opts.RegisterCheck = DefaultRegisterCheck
}
if len(opts.Address) == 0 {
opts.Address = DefaultAddress
}
if len(opts.Name) == 0 {
opts.Name = DefaultName
}
if len(opts.Id) == 0 {
opts.Id = DefaultId
}
if len(opts.Version) == 0 {
opts.Version = DefaultVersion
}
return opts
}
// Server name
func Name(n string) Option {
return func(o *Options) {
o.Name = n
}
}
// Unique server id
func Id(id string) Option {
return func(o *Options) {
o.Id = id
}
}
// Version of the service
func Version(v string) Option {
return func(o *Options) {
o.Version = v
}
}
// Address to bind to - host:port
func Address(a string) Option {
return func(o *Options) {
o.Address = a
}
}
// The address to advertise for discovery - host:port
func Advertise(a string) Option {
return func(o *Options) {
o.Advertise = a
}
}
// Broker to use for pub/sub
func Broker(b broker.Broker) Option {
return func(o *Options) {
o.Broker = b
}
}
// Codec to use to encode/decode requests for a given content type
func Codec(contentType string, c codec.NewCodec) Option {
return func(o *Options) {
o.Codecs[contentType] = c
}
}
// Context specifies a context for the service.
// Can be used to signal shutdown of the service
// Can be used for extra option values.
func Context(ctx context.Context) Option {
return func(o *Options) {
o.Context = ctx
}
}
// Registry used for discovery
func Registry(r registry.Registry) Option {
return func(o *Options) {
o.Registry = r
}
}
// Tracer mechanism for distributed tracking
func Tracer(t trace.Tracer) Option {
return func(o *Options) {
o.Tracer = t
}
}
// Auth mechanism for role based access control
func Auth(a auth.Auth) Option {
return func(o *Options) {
o.Auth = a
}
}
// Transport mechanism for communication e.g http, rabbitmq, etc
func Transport(t transport.Transport) Option {
return func(o *Options) {
o.Transport = t
}
}
// Metadata associated with the server
func Metadata(md map[string]string) Option {
return func(o *Options) {
o.Metadata = md
}
}
// RegisterCheck run func before registry service
func RegisterCheck(fn func(context.Context) error) Option {
return func(o *Options) {
o.RegisterCheck = fn
}
}
// Register the service with a TTL
func RegisterTTL(t time.Duration) Option {
return func(o *Options) {
o.RegisterTTL = t
}
}
// Register the service with at interval
func RegisterInterval(t time.Duration) Option {
return func(o *Options) {
o.RegisterInterval = t
}
}
// TLSConfig specifies a *tls.Config
func TLSConfig(t *tls.Config) Option {
return func(o *Options) {
// set the internal tls
o.TLSConfig = t
// set the default transport if one is not
// already set. Required for Init call below.
if o.Transport == nil {
o.Transport = transport.DefaultTransport
}
// set the transport tls
o.Transport.Init(
transport.Secure(true),
transport.TLSConfig(t),
)
}
}
// WithRouter sets the request router
func WithRouter(r Router) Option {
return func(o *Options) {
o.Router = r
}
}
// Wait tells the server to wait for requests to finish before exiting
// If `wg` is nil, server only wait for completion of rpc handler.
// For user need finer grained control, pass a concrete `wg` here, server will
// wait against it on stop.
func Wait(wg *sync.WaitGroup) Option {
return func(o *Options) {
if o.Context == nil {
o.Context = context.Background()
}
if wg == nil {
wg = new(sync.WaitGroup)
}
o.Context = context.WithValue(o.Context, "wait", wg)
}
}
// Adds a handler Wrapper to a list of options passed into the server
func WrapHandler(w HandlerWrapper) Option {
return func(o *Options) {
o.HdlrWrappers = append(o.HdlrWrappers, w)
}
}
// Adds a subscriber Wrapper to a list of options passed into the server
func WrapSubscriber(w SubscriberWrapper) Option {
return func(o *Options) {
o.SubWrappers = append(o.SubWrappers, w)
}
}