Trait oe_rpc_servers::Middleware

pub trait Middleware<M>: 'static + Send + Sync where
    M: Metadata, {
    type Future: 'static + Future + Send;
    type CallFuture: 'static + Future + Send;
    fn on_request<F, X>(
        &self, 
        request: Request, 
        meta: M, 
        next: F
    ) -> Either<Self::Future, X>
    where
        F: Fn(Request, M) -> X + Send + Sync,
        X: 'static + Future<Item = Option<Response>, Error = ()> + Send,
    { ... }
    fn on_call<F, X>(
        &self, 
        call: Call, 
        meta: M, 
        next: F
    ) -> Either<Self::CallFuture, X>
    where
        F: Fn(Call, M) -> X + Send + Sync,
        X: 'static + Future<Item = Option<Output>, Error = ()> + Send,
    { ... }
}

RPC middleware

Associated Types

type Future: 'static + Future + Send

A returned request future.

type CallFuture: 'static + Future + Send

A returned call future.

Provided methods

fn on_request<F, X>(
    &self,
    request: Request,
    meta: M,
    next: F
) -> Either<Self::Future, X> where
    F: Fn(Request, M) -> X + Send + Sync,
    X: 'static + Future<Item = Option<Response>, Error = ()> + Send, 

Method invoked on each request. Allows you to either respond directly (without executing RPC call) or do any additional work before and/or after processing the request.

fn on_call<F, X>(
    &self,
    call: Call,
    meta: M,
    next: F
) -> Either<Self::CallFuture, X> where
    F: Fn(Call, M) -> X + Send + Sync,
    X: 'static + Future<Item = Option<Output>, Error = ()> + Send, 

Method invoked on each call inside a request.

Allows you to either handle the call directly (without executing RPC call).

Implementations on Foreign Types

impl<M> Middleware<M> for Noop where
    M: Metadata, 

type Future = Box<dyn Future<Error = (), Item = Option<Response>> + Send + 'static, Global>

type CallFuture = Box<dyn Future<Error = (), Item = Option<Output>> + Send + 'static, Global>

impl<M, A, B, C> Middleware<M> for (A, B, C) where
    M: Metadata,
    A: Middleware<M>,
    B: Middleware<M>,
    C: Middleware<M>, 

type Future = Either<<A as Middleware<M>>::Future, Either<<B as Middleware<M>>::Future, <C as Middleware<M>>::Future>>

type CallFuture = Either<<A as Middleware<M>>::CallFuture, Either<<B as Middleware<M>>::CallFuture, <C as Middleware<M>>::CallFuture>>

pub fn on_request<F, X>(
    &self,
    request: Request,
    meta: M,
    process: F
) -> Either<<(A, B, C) as Middleware<M>>::Future, X> where
    F: Fn(Request, M) -> X + Send + Sync,
    X: 'static + Future<Item = Option<Response>, Error = ()> + Send, 

pub fn on_call<F, X>(
    &self,
    call: Call,
    meta: M,
    process: F
) -> Either<<(A, B, C) as Middleware<M>>::CallFuture, X> where
    F: Fn(Call, M) -> X + Send + Sync,
    X: 'static + Future<Item = Option<Output>, Error = ()> + Send, 

impl<M, A, B, C, D> Middleware<M> for (A, B, C, D) where
    M: Metadata,
    A: Middleware<M>,
    B: Middleware<M>,
    C: Middleware<M>,
    D: Middleware<M>, 

type Future = Either<<A as Middleware<M>>::Future, Either<<B as Middleware<M>>::Future, Either<<C as Middleware<M>>::Future, <D as Middleware<M>>::Future>>>

type CallFuture = Either<<A as Middleware<M>>::CallFuture, Either<<B as Middleware<M>>::CallFuture, Either<<C as Middleware<M>>::CallFuture, <D as Middleware<M>>::CallFuture>>>

pub fn on_request<F, X>(
    &self,
    request: Request,
    meta: M,
    process: F
) -> Either<<(A, B, C, D) as Middleware<M>>::Future, X> where
    F: Fn(Request, M) -> X + Send + Sync,
    X: 'static + Future<Item = Option<Response>, Error = ()> + Send, 

pub fn on_call<F, X>(
    &self,
    call: Call,
    meta: M,
    process: F
) -> Either<<(A, B, C, D) as Middleware<M>>::CallFuture, X> where
    F: Fn(Call, M) -> X + Send + Sync,
    X: 'static + Future<Item = Option<Output>, Error = ()> + Send, 

impl<M, A, B> Middleware<M> for (A, B) where
    M: Metadata,
    A: Middleware<M>,
    B: Middleware<M>, 

type Future = Either<<A as Middleware<M>>::Future, <B as Middleware<M>>::Future>

type CallFuture = Either<<A as Middleware<M>>::CallFuture, <B as Middleware<M>>::CallFuture>

pub fn on_request<F, X>(
    &self,
    request: Request,
    meta: M,
    process: F
) -> Either<<(A, B) as Middleware<M>>::Future, X> where
    F: Fn(Request, M) -> X + Send + Sync,
    X: 'static + Future<Item = Option<Response>, Error = ()> + Send, 

pub fn on_call<F, X>(
    &self,
    call: Call,
    meta: M,
    process: F
) -> Either<<(A, B) as Middleware<M>>::CallFuture, X> where
    F: Fn(Call, M) -> X + Send + Sync,
    X: 'static + Future<Item = Option<Output>, Error = ()> + Send, 

Implementors