spi/me.ahoo.wow.spi.log/Transport

Transport

class Transport @InternalWowApi constructor(val wait: WaitContext? = null, val reservations: List<ReservationKey> = emptyList(), val trace: Map<String, String> = emptyMap(), val releases: List<ReservationKey> = emptyList())

What an append carries for delivery, not as fact (§4): domain code and queries never see it, and a migration or a replay drops it. The runtime appends it encoded (TransportCodec), and a backend stores those bytes apart from the stream (its own column or field), never reading them.

wait is the wait context of a command whose caller waits beyond COMMITTED: the subscription named by its next hop signals the waiting node once it has handled the entry.
reservations are the keys this attempt reserved, held already or not: the reservation subscription confirms them from the log, so a key is confirmed even when the after-append fast path never ran.
trace is tracing context such as the W3C traceparent.
releases are the keys this attempt released: the kernel releases them once the append commits, and the reservation subscription releases them again from the log, after the keys of reservations are confirmed, so a release is not lost to a crash after the append.

Fields may be added: construct one with of; the constructor is internal to Wow.

Constructors

Transport

@InternalWowApi

constructor(wait: WaitContext? = null, reservations: List<ReservationKey> = emptyList(), trace: Map<String, String> = emptyMap(), releases: List<ReservationKey> = emptyList())