Trait juniper_graphql_ws::Init

pub trait Init<S: ScalarValue, CtxT>: Unpin + 'static {
    type Error: Error;
    type Future: Future<Output = Result<ConnectionConfig<CtxT>, Self::Error>> + Send + 'static;
    fn init(self, params: Variables<S>) -> Self::Future;
}

Init defines the requirements for types that can provide connection configurations when ConnectionInit messages are received. Implementations are provided for ConnectionConfig and closures that meet the requirements.

Associated Types

type Error: Error

The error that is returned on failure. The formatted error will be used as the contents of the “message” field sent back to the client.

type Future: Future<Output = Result<ConnectionConfig<CtxT>, Self::Error>> + Send + 'static

The future configuration type.

Required methods

fn init(self, params: Variables<S>) -> Self::Future

Returns a future for the configuration to use.

Implementors

impl<F, S, CtxT, Fut, E> Init<S, CtxT> for F where
    S: ScalarValue,
    F: FnOnce(Variables<S>) -> Fut + Unpin + 'static,
    Fut: Future<Output = Result<ConnectionConfig<CtxT>, E>> + Send + 'static,
    E: Error, 

impl<S: ScalarValue, CtxT: Unpin + Send + 'static> Init<S, CtxT> for ConnectionConfig<CtxT>