Struct Host 

#[non_exhaustive]
pub struct Host {
    pub background_tasks: bool,
    pub websockets: bool,
}

What the host running the application can do beyond answering requests.

A server process lives as long as it likes and owns its sockets. A Lambda sandbox is frozen between invocations, so a task listening for NOTIFY is asleep exactly when the notification arrives, and API Gateway does not upgrade a connection to a WebSocket at all.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

background_tasks: bool

Long-lived background work: the NOTIFY schema reloader (db_channel_enabled) and the subscription broker’s listener.

websockets: bool

Upgrading a connection to a WebSocket, which GraphQL subscriptions are served over.

Implementations

impl Host

pub const SERVER: Host

A long-running server process.

pub const LAMBDA: Host

An AWS Lambda function: no background work, no WebSockets.

Trait Implementations

impl Clone for Host

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Host

impl Debug for Host

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.