package server import ( "context" "sync" "time" "github.com/micro/go-micro/broker" "github.com/micro/go-micro/codec" "github.com/micro/go-micro/debug/trace" "github.com/micro/go-micro/registry" "github.com/micro/go-micro/transport" ) type Options struct { Codecs map[string]codec.NewCodec Broker broker.Broker Registry registry.Registry Tracer trace.Tracer 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 // 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.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 } } // 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 } } // 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) } }