Trait tencent_scf::convert::FromReader

pub trait FromReader: Sized {
    type Error;
    fn from_reader<Reader: Read + Send>(
        reader: Reader
    ) -> Result<Self, Self::Error>;
}

Trait for conversion from raw incoming invocation to event type

Custom event should implement this trait so that the runtime can deserialize the incoming invocation into the desired event.

Implement the Trait

One needs to provide a method that can consume a raw byte reader into the desired type.

use tencent_scf::convert::FromReader;

// Our custom event type
struct Event(String);

// Simply read everything from the reader.
impl FromReader for Event {
    type Error = std::io::Error;

    fn from_reader<Reader: std::io::Read + Send>(
        mut reader: Reader,
    ) -> Result<Self, Self::Error> {
        let mut buf = String::new();
        reader.read_to_string(&mut buf)?;
        Ok(Event(buf))
    }
}

Associated Types

type Error

Possible error during the conversion. std::fmt::Display is all the runtime needs.

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Required methods

fn from_reader<Reader: Read + Send>(reader: Reader) -> Result<Self, Self::Error>

Consume the reader and produce the deserialized output

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Implementations on Foreign Types

impl FromReader for Vec<u8>

Auto deserialization into a byte array.

type Error = Error

fn from_reader<Reader: Read + Send>(
    mut reader: Reader
) -> Result<Self, Self::Error>

impl FromReader for String

Auto deserialization into a string.

type Error = Error

fn from_reader<Reader: Read + Send>(
    mut reader: Reader
) -> Result<Self, Self::Error>

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Implementors

impl<T> FromReader for T where
    T: DeserializeOwned + AsJson, 

Auto deserilization for types that are serde::Deserialize and marked as AsJson.

type Error = Error

fn from_reader<Reader: Read + Send>(reader: Reader) -> Result<Self, Self::Error>

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