Trait Message 

pub trait Message: Serialize + DeserializeOwned {
    const TYPE: &'static str;
    const VERSION: u16;
}

A type that can be built into an Envelope and persisted or published.

TYPE/VERSION are stable application contracts: they identify a message across serialization, storage and the wire, and are never derived from std::any::type_name::<T>() or a module path — renaming or moving the Rust type must not orphan a pending row or a message already in flight (ADR 0010).

use reliar_core::Message;

#[derive(serde::Serialize, serde::Deserialize)]
struct OrderCancelled {
    order_id: u64,
}

impl Message for OrderCancelled {
    const TYPE: &'static str = "orders.cancelled";
    const VERSION: u16 = 1;
}

assert_eq!(OrderCancelled::TYPE, "orders.cancelled");
assert_eq!(OrderCancelled::VERSION, 1);

Required Associated Constants

const TYPE: &'static str

The message’s name, e.g. "orders.created". Stable once anything has published it.

const VERSION: u16

The message’s version. Bump when the wire shape changes incompatibly.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors