Struct Opens 

pub struct Opens<Level>(/* private fields */);

What the table’s transactions open at, a level marker: set by InboxSpec::opens.

Examples

use chrono::{DateTime, Utc};
use ruststream_sqlx::dialect::{Column, level};
use ruststream_sqlx::spec::{Lease, Opens, Payload};
use ruststream_sqlx::{InboxSpec, InboxTable};

#[derive(sqlx::FromRow)]
pub struct PrintJob {
    id: i64,
    payload: Vec<u8>,
}

impl InboxTable for PrintJob {
    type Id = i64;
    // A transaction takes the database's write lock as it begins, not at its first write.
    type Table = InboxSpec<(Lease<DateTime<Utc>>, Opens<level::Immediate>, Payload)>;
    const TABLE: Self::Table = InboxSpec::new("print_jobs", Column::new("id").generated())
        .lease(Column::new("locked_until"))
        .opens::<level::Immediate>()
        .payload(Column::new("payload"));

    fn id(&self) -> &i64 {
        &self.id
    }
}

Trait Implementations

impl<Level: Debug> Debug for Opens<Level>

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

Formats the value using the given formatter.

impl<Level> Declaration for Opens<Level>

type Form = Unset

The form: Lease or Advisory; unset for the row lock form.

type Message = Unset

The message mode: Payload; unset for row mode.

type Key = Unset

The partition key: Key.

type Attempt = Unset

The attempt count: Attempt.

type Headers = Unset

The delivery’s headers: Headers or HeaderFields.

type RetryAfter = Unset

The time a retried row is due: RetryAfter.

type ProcessedAt = Unset

The time a row was processed: ProcessedAt.

type Clock = Unset

The clock: Clock; unset for SystemClock.

type Opening = Set<Opens<Level>>

What the table’s transactions open at: Opens; unset for the database’s default.

type Fifo = Unset

Groups kept in order: Fifo.

type OwnClaim = Unset

The service’s own claim: own::Claim.

type OwnFetch = Unset

The service’s own fetch: own::Fetch.

type OwnAck = Unset

The service’s own ack: own::Ack.

type OwnRetry = Unset

The service’s own retry: own::Retry.

type OwnRetryAfter = Unset

The service’s own delayed retry: own::RetryAfter.

type OwnDiscard = Unset

The service’s own discard: own::Discard.

type OwnDeadLetter = Unset

The service’s own dead letter: own::DeadLetter.

type OwnExtend = Unset

The service’s own lease extension: own::Extend.

type OwnLock = Unset

The service’s own lock: own::Lock.

type OwnUnlock = Unset

The service’s own unlock: own::Unlock.