Attribute Macro entity_trait_impl 

#[entity_trait_impl]

Attribute macro for trait capability impl blocks.

Each async fn annotated with #[rpc], #[workflow], or #[activity] becomes an RPC handler that can be called on entities using this trait.

Attributes

• #[entity_trait_impl] — default crate path
• #[entity_trait_impl(krate = "crate")] — for internal use within cruster

Method Annotations

• #[rpc] — Read-only RPC handler (no state mutation)
• #[workflow] — Durable workflow handler (state mutations)
• #[activity] — Durable activity handler (external side effects)

Visibility Annotations

• #[public] — Callable by external clients (default for #[rpc] and #[workflow])
• #[protected] — Callable only by other entities (entity-to-entity)
• #[private] — Internal only (default for #[activity])

Example

#[entity_trait_impl]
#[state(AuditLog)]
impl Auditable {
    fn init(&self) -> Result<AuditLog, ClusterError> {
        Ok(AuditLog::default())
    }

    #[activity]
    #[protected]
    async fn log_action(&self, action: String) -> Result<(), ClusterError> {
        let mut state = self.state_mut().await;
        state.log(action);
        Ok(())
    }

    #[rpc]
    async fn get_log(&self) -> Result<Vec<String>, ClusterError> {
        Ok(self.state().entries.clone())
    }
}