关于micro:go-micro-transport

micro.newService()中newOptions

func newOptions(opts ...Option) Options {
    opt := Options{
        Auth:      auth.DefaultAuth,
        Broker:    broker.DefaultBroker,
        Cmd:       cmd.DefaultCmd,
        Config:    config.DefaultConfig,
        Client:    client.DefaultClient,
        Server:    server.DefaultServer,
        Store:     store.DefaultStore,
        Registry:  registry.DefaultRegistry,
        Router:    router.DefaultRouter,
        Runtime:   runtime.DefaultRuntime,
        Transport: transport.DefaultTransport,
        Context:   context.Background(),
        Signal:    true,
    }
    
    for _, o := range opts {
        o(&opt)
    }
    
    return opt
}

初始化了一堆根底设置，来看看Transport
transport.DefaultTransport,
在transport/transport.go中的
DefaultTransport Transport = newHTTPTransport()

func NewTransport(opts ...Option) Transport {
    return newHTTPTransport(opts...)
}

func newHTTPTransport(opts ...Option) *httpTransport {
    var options Options
    for _, o := range opts {
        o(&options)
    }
    return &httpTransport{opts: options}
}

这里就初始化并设置options,返回了一个httpTransport{}

手动指定其余的Transport，两种形式

1. micro.NewService()中传入micro.Transport(grpc.NewTransport()),， 即可应用grpc Transport
2. plugins.go中import退出"github.com/micro/go-plugins/transport/grpc/v2"