package client import ( "context" "time" "github.com/micro/go-micro/broker" "github.com/micro/go-micro/client/selector" "github.com/micro/go-micro/codec" "github.com/micro/go-micro/registry" "github.com/micro/go-micro/transport" ) type Options struct { // Used to select codec ContentType string // Plugged interfaces Broker broker.Broker Codecs map[string]codec.NewCodec Registry registry.Registry Selector selector.Selector Transport transport.Transport // Router sets the router Router Router // Connection Pool PoolSize int PoolTTL time.Duration // Middleware for client Wrappers []Wrapper // Default Call Options CallOptions CallOptions // Other options for implementations of the interface // can be stored in a context Context context.Context } type CallOptions struct { SelectOptions []selector.SelectOption // Address of remote host Address string // Backoff func Backoff BackoffFunc // Check if retriable func Retry RetryFunc // Transport Dial Timeout DialTimeout time.Duration // Number of Call attempts Retries int // Request/Response timeout RequestTimeout time.Duration // Middleware for low level call func CallWrappers []CallWrapper // Other options for implementations of the interface // can be stored in a context Context context.Context } type PublishOptions struct { // Exchange is the routing exchange for the message Exchange string // Other options for implementations of the interface // can be stored in a context Context context.Context } type MessageOptions struct { ContentType string } type RequestOptions struct { ContentType string Stream bool // Other options for implementations of the interface // can be stored in a context Context context.Context } func newOptions(options ...Option) Options { opts := Options{ Codecs: make(map[string]codec.NewCodec), CallOptions: CallOptions{ Backoff: DefaultBackoff, Retry: DefaultRetry, Retries: DefaultRetries, RequestTimeout: DefaultRequestTimeout, DialTimeout: transport.DefaultDialTimeout, }, PoolSize: DefaultPoolSize, PoolTTL: DefaultPoolTTL, } for _, o := range options { o(&opts) } if len(opts.ContentType) == 0 { opts.ContentType = DefaultContentType } if opts.Broker == nil { opts.Broker = broker.DefaultBroker } if opts.Registry == nil { opts.Registry = registry.DefaultRegistry } if opts.Selector == nil { opts.Selector = selector.NewSelector( selector.Registry(opts.Registry), ) } if opts.Transport == nil { opts.Transport = transport.DefaultTransport } return opts } // Broker to be used for pub/sub func Broker(b broker.Broker) Option { return func(o *Options) { o.Broker = b } } // Codec to be used 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 } } // Default content type of the client func ContentType(ct string) Option { return func(o *Options) { o.ContentType = ct } } // PoolSize sets the connection pool size func PoolSize(d int) Option { return func(o *Options) { o.PoolSize = d } } // PoolSize sets the connection pool size func PoolTTL(d time.Duration) Option { return func(o *Options) { o.PoolTTL = d } } // Registry to find nodes for a given service func Registry(r registry.Registry) Option { return func(o *Options) { o.Registry = r } } // Transport to use for communication e.g http, rabbitmq, etc func Transport(t transport.Transport) Option { return func(o *Options) { o.Transport = t } } // Select is used to select a node to route a request to func Selector(s selector.Selector) Option { return func(o *Options) { o.Selector = s } } // Adds a Wrapper to a list of options passed into the client func Wrap(w Wrapper) Option { return func(o *Options) { o.Wrappers = append(o.Wrappers, w) } } // Adds a Wrapper to the list of CallFunc wrappers func WrapCall(cw ...CallWrapper) Option { return func(o *Options) { o.CallOptions.CallWrappers = append(o.CallOptions.CallWrappers, cw...) } } // Backoff is used to set the backoff function used // when retrying Calls func Backoff(fn BackoffFunc) Option { return func(o *Options) { o.CallOptions.Backoff = fn } } // Number of retries when making the request. // Should this be a Call Option? func Retries(i int) Option { return func(o *Options) { o.CallOptions.Retries = i } } // Retry sets the retry function to be used when re-trying. func Retry(fn RetryFunc) Option { return func(o *Options) { o.CallOptions.Retry = fn } } // The request timeout. // Should this be a Call Option? func RequestTimeout(d time.Duration) Option { return func(o *Options) { o.CallOptions.RequestTimeout = d } } // Transport dial timeout func DialTimeout(d time.Duration) Option { return func(o *Options) { o.CallOptions.DialTimeout = d } } // Call Options // WithExchange sets the exchange to route a message through func WithExchange(e string) PublishOption { return func(o *PublishOptions) { o.Exchange = e } } // WithAddress sets the remote address to use rather than using service discovery func WithAddress(a string) CallOption { return func(o *CallOptions) { o.Address = a } } func WithSelectOption(so ...selector.SelectOption) CallOption { return func(o *CallOptions) { o.SelectOptions = append(o.SelectOptions, so...) } } // WithCallWrapper is a CallOption which adds to the existing CallFunc wrappers func WithCallWrapper(cw ...CallWrapper) CallOption { return func(o *CallOptions) { o.CallWrappers = append(o.CallWrappers, cw...) } } // WithBackoff is a CallOption which overrides that which // set in Options.CallOptions func WithBackoff(fn BackoffFunc) CallOption { return func(o *CallOptions) { o.Backoff = fn } } // WithRetry is a CallOption which overrides that which // set in Options.CallOptions func WithRetry(fn RetryFunc) CallOption { return func(o *CallOptions) { o.Retry = fn } } // WithRetries is a CallOption which overrides that which // set in Options.CallOptions func WithRetries(i int) CallOption { return func(o *CallOptions) { o.Retries = i } } // WithRequestTimeout is a CallOption which overrides that which // set in Options.CallOptions func WithRequestTimeout(d time.Duration) CallOption { return func(o *CallOptions) { o.RequestTimeout = d } } // WithDialTimeout is a CallOption which overrides that which // set in Options.CallOptions func WithDialTimeout(d time.Duration) CallOption { return func(o *CallOptions) { o.DialTimeout = d } } // Request Options func WithContentType(ct string) RequestOption { return func(o *RequestOptions) { o.ContentType = ct } } func StreamingRequest() RequestOption { return func(o *RequestOptions) { o.Stream = true } } // WithRouter sets the client router func WithRouter(r Router) Option { return func(o *Options) { o.Router = r } }