Trait Service

pub trait Service:
    WithServiceAbi
    + ServiceAbi
    + Sized {
    type Parameters: Serialize + DeserializeOwned + Send + Sync + Clone + Debug + 'static;

    // Required methods
    async fn new(runtime: ServiceRuntime<Self>) -> Self;
    async fn handle_query(&self, query: Self::Query) -> Self::QueryResponse;
}

The service interface of a Linera application.

As opposed to the Contract interface of an application, service entry points are triggered by JSON queries (typically GraphQL). Their execution cannot modify storage and is not gas-metered.

Required Associated Types

type Parameters: Serialize + DeserializeOwned + Send + Sync + Clone + Debug + 'static

Immutable parameters specific to this application.

Required Methods

async fn new(runtime: ServiceRuntime<Self>) -> Self

Creates an in-memory instance of the service handler.

async fn handle_query(&self, query: Self::Query) -> Self::QueryResponse

Executes a read-only query on the state of this application.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors