Module operation

Expand description

Handle execution of database operations and transactions.

Modules§

hooks: Commit hooks for executing custom logic before and after transaction commits.

BisectOutcomes: The result of a completed search: one outcome per input item, plus what it cost.
BisectSearch: Drives a bisect over n items: which range to probe next, and what each verdict means for the ranges still outstanding.
DbOp: Default return type of the derived EsRepo::begin_op().
DbOpWithTime: Equivileant of DbOp just that the time is guaranteed to be cached.
HookSlot: Where a released SavepointOp’s staged commit hooks fold into.
OpWithTime: Wrapper that guarantees time is available, borrowing the underlying operation.
SavepointOp: An AtomicOperation scoped to a database SAVEPOINT inside a parent DbOp or another SavepointOp.
TransientLimitExceeded: The transient allowance ran out: the same range kept failing on contention.
TransientPolicy: Which probe failures are transient, and how many re-probes they may buy.

BisectBudget: How many probes a bisect may spend before giving up on the ranges it has not yet resolved.
ItemOutcome: One input item’s resolution. Positionally aligned with the input slice.
ProbeVerdict: What a probe over one range turned out to be.

DEFAULT_MAX_TRANSIENT_RETRIES: How many times a transiently-failed range may be re-probed before the search is abandoned.

AtomicOperation: Trait to signify we can make multiple consistent database roundtrips.
AtomicOperationWithTime
BatchIsolation: Batch isolation for every AtomicOperation.
SavepointOperation: Savepoints for every AtomicOperation, derived rather than hand-written.

is_retryable_conflict: retryable_conflict_code as a predicate.
retryable_conflict_code: The Postgres sqlstate of a failure that says nothing about the statement that hit it, or None.