package client import ( "context" "crypto/tls" "time" "github.com/unistack-org/micro/v3/broker" "github.com/unistack-org/micro/v3/codec" "github.com/unistack-org/micro/v3/logger" "github.com/unistack-org/micro/v3/meter" "github.com/unistack-org/micro/v3/network/transport" "github.com/unistack-org/micro/v3/register" "github.com/unistack-org/micro/v3/router" "github.com/unistack-org/micro/v3/selector" "github.com/unistack-org/micro/v3/selector/random" "github.com/unistack-org/micro/v3/tracer" ) // Options holds client options type Options struct { // Selector used to select needed address Selector selector.Selector // Logger used to log messages Logger logger.Logger // Tracer used for tracing Tracer tracer.Tracer // Broker used to publish messages Broker broker.Broker // Meter used for metrics Meter meter.Meter // Router used to get route Router router.Router // Transport used for transfer messages Transport transport.Transport // Context is used for external options Context context.Context // Lookup func used to get destination addr Lookup LookupFunc // Codecs map Codecs map[string]codec.Codec // TLSConfig specifies tls.Config for secure connection TLSConfig *tls.Config // Proxy is used for proxy requests Proxy string // ContentType is used to select codec ContentType string // Name is the client name Name string // Wrappers contains wrappers Wrappers []Wrapper // CallOptions contains default CallOptions CallOptions CallOptions // PoolSize connection pool size PoolSize int // PoolTTL connection pool ttl PoolTTL time.Duration } // NewCallOptions creates new call options struct func NewCallOptions(opts ...CallOption) CallOptions { options := CallOptions{} for _, o := range opts { o(&options) } return options } // CallOptions holds client call options type CallOptions struct { // Router used for route Router router.Router // Selector selects addr Selector selector.Selector // Context used for deadline Context context.Context // Retry func used for retries Retry RetryFunc // Backoff func used for backoff when retry Backoff BackoffFunc // Network name Network string // Content-Type ContentType string // CallWrappers call wrappers CallWrappers []CallWrapper // SelectOptions selector options SelectOptions []selector.SelectOption // Address specifies static addr list Address []string // Retries specifies retries num Retries int // StreamTimeout stream timeout StreamTimeout time.Duration // RequestTimeout request timeout RequestTimeout time.Duration // DialTimeout dial timeout DialTimeout time.Duration // AuthToken flag AuthToken bool } // Context pass context to client func Context(ctx context.Context) Option { return func(o *Options) { o.Context = ctx } } // NewPublishOptions create new PublishOptions struct from option func NewPublishOptions(opts ...PublishOption) PublishOptions { options := PublishOptions{} for _, o := range opts { o(&options) } return options } // PublishOptions holds publish options type PublishOptions struct { // Context used for external options Context context.Context // Exchange topic exchange name Exchange string } // NewMessageOptions creates message options struct func NewMessageOptions(opts ...MessageOption) MessageOptions { options := MessageOptions{} for _, o := range opts { o(&options) } return options } // MessageOptions holds client message options type MessageOptions struct { // ContentType specify content-type of message ContentType string } // NewRequestOptions creates new RequestOptions struct func NewRequestOptions(opts ...RequestOption) RequestOptions { options := RequestOptions{} for _, o := range opts { o(&options) } return options } // RequestOptions holds client request options type RequestOptions struct { // Context used for external options Context context.Context // ContentType specify content-type of message ContentType string // Stream flag Stream bool } // NewOptions creates new options struct func NewOptions(opts ...Option) Options { options := Options{ Context: context.Background(), ContentType: DefaultContentType, Codecs: make(map[string]codec.Codec), CallOptions: CallOptions{ Context: context.Background(), Backoff: DefaultBackoff, Retry: DefaultRetry, Retries: DefaultRetries, RequestTimeout: DefaultRequestTimeout, DialTimeout: transport.DefaultDialTimeout, }, Lookup: LookupRoute, PoolSize: DefaultPoolSize, PoolTTL: DefaultPoolTTL, Selector: random.NewSelector(), Logger: logger.DefaultLogger, Broker: broker.DefaultBroker, Meter: meter.DefaultMeter, Tracer: tracer.DefaultTracer, Router: router.DefaultRouter, Transport: transport.DefaultTransport, } for _, o := range opts { o(&options) } return options } // Broker to be used for pub/sub func Broker(b broker.Broker) Option { return func(o *Options) { o.Broker = b } } // Tracer to be used for tracing func Tracer(t tracer.Tracer) Option { return func(o *Options) { o.Tracer = t } } // Logger to be used for log mesages func Logger(l logger.Logger) Option { return func(o *Options) { o.Logger = l } } // Meter to be used for metrics func Meter(m meter.Meter) Option { return func(o *Options) { o.Meter = m } } // Codec to be used to encode/decode requests for a given content type func Codec(contentType string, c codec.Codec) Option { return func(o *Options) { o.Codecs[contentType] = c } } // ContentType used by default if not specified func ContentType(ct string) Option { return func(o *Options) { o.ContentType = ct } } // Proxy sets the proxy address func Proxy(addr string) Option { return func(o *Options) { o.Proxy = addr } } // PoolSize sets the connection pool size func PoolSize(d int) Option { return func(o *Options) { o.PoolSize = d } } // PoolTTL sets the connection pool ttl func PoolTTL(d time.Duration) Option { return func(o *Options) { o.PoolTTL = d } } // Transport to use for communication e.g http, rabbitmq, etc func Transport(t transport.Transport) Option { return func(o *Options) { o.Transport = t } } // Register sets the routers register func Register(r register.Register) Option { return func(o *Options) { if o.Router != nil { o.Router.Init(router.Register(r)) } } } // Router is used to lookup routes for a service func Router(r router.Router) Option { return func(o *Options) { o.Router = r } } // Selector is used to select a route func Selector(s selector.Selector) Option { return func(o *Options) { o.Selector = s } } // Wrap adds a wrapper to the list of options passed into the client func Wrap(w Wrapper) Option { return func(o *Options) { o.Wrappers = append(o.Wrappers, w) } } // WrapCall 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 } } // Name sets the client name func Name(n string) Option { return func(o *Options) { o.Name = n } } // Lookup sets the lookup function to use for resolving service names func Lookup(l LookupFunc) Option { return func(o *Options) { o.Lookup = l } } // 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. // set the transport tls o.Transport.Init( transport.TLSConfig(t), ) } } // Retries sets the retry count when making the request. 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 } } // RequestTimeout is the request timeout. func RequestTimeout(d time.Duration) Option { return func(o *Options) { o.CallOptions.RequestTimeout = d } } // StreamTimeout sets the stream timeout func StreamTimeout(d time.Duration) Option { return func(o *Options) { o.CallOptions.StreamTimeout = d } } // DialTimeout sets the dial timeout func DialTimeout(d time.Duration) Option { return func(o *Options) { o.CallOptions.DialTimeout = d } } // WithExchange sets the exchange to route a message through func WithExchange(e string) PublishOption { return func(o *PublishOptions) { o.Exchange = e } } // PublishContext sets the context in publish options func PublishContext(ctx context.Context) PublishOption { return func(o *PublishOptions) { o.Context = ctx } } // WithContentType specifies call content type func WithContentType(ct string) CallOption { return func(o *CallOptions) { o.ContentType = ct } } // WithAddress sets the remote addresses to use rather than using service discovery func WithAddress(a ...string) CallOption { return func(o *CallOptions) { o.Address = a } } // 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 } } // WithStreamTimeout sets the stream timeout func WithStreamTimeout(d time.Duration) CallOption { return func(o *CallOptions) { o.StreamTimeout = 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 } } // WithAuthToken is a CallOption which overrides the // authorization header with the services own auth token func WithAuthToken() CallOption { return func(o *CallOptions) { o.AuthToken = true } } // WithNetwork is a CallOption which sets the network attribute func WithNetwork(n string) CallOption { return func(o *CallOptions) { o.Network = n } } // WithRouter sets the router to use for this call func WithRouter(r router.Router) CallOption { return func(o *CallOptions) { o.Router = r } } // WithSelector sets the selector to use for this call func WithSelector(s selector.Selector) CallOption { return func(o *CallOptions) { o.Selector = s } } // WithSelectOptions sets the options to pass to the selector for this call func WithSelectOptions(sops ...selector.SelectOption) CallOption { return func(o *CallOptions) { o.SelectOptions = sops } } // WithMessageContentType sets the message content type func WithMessageContentType(ct string) MessageOption { return func(o *MessageOptions) { o.ContentType = ct } } // StreamingRequest specifies that request is streaming func StreamingRequest(b bool) RequestOption { return func(o *RequestOptions) { o.Stream = b } } // RequestContentType specifies request content type func RequestContentType(ct string) RequestOption { return func(o *RequestOptions) { o.ContentType = ct } }