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feat(db): expose connection startup timeline #7286

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20 changes: 18 additions & 2 deletions crates/buzz-db/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -31,8 +31,9 @@ pub mod error;
mod test_support;

pub use runtime::{
insert_mentions, migration, replica_fence, Db, DbConfig, DbPoolStats, DbReadinessOutcome,
ReadSession,
insert_mentions, migration, replica_fence, Db, DbConfig, DbConnectionEdge,
DbConnectionLifecycleEvent, DbConnectionObserver, DbConnectionOutcome, DbConnectionReason,
DbConnectionStep, DbPoolRole, DbPoolStats, DbReadinessOutcome, ReadSession,
};

/// Valid low-cardinality `(pool_role, operation)` pairs for pool-acquisition telemetry.
Expand All @@ -42,6 +43,21 @@ pub const DB_POOL_ACQUIRE_VALID_PAIRS: [(&str, &str); 11] =
/// Raw Prometheus series ceiling per relay pod for the operation-aware contract.
pub const DB_POOL_ACQUIRE_RAW_SERIES_PER_POD: usize =
runtime::observability::POOL_ACQUIRE_RAW_SERIES_PER_POD;

/// Valid database connection role/step pairs with a start counter.
pub const DB_CONNECTION_STARTED_STEPS: [(DbPoolRole, DbConnectionStep); 4] =
runtime::CONNECTION_STARTED_STEPS;

/// Valid database connection role/step pairs with a duration histogram.
pub const DB_CONNECTION_DURATION_STEPS: [(DbPoolRole, DbConnectionStep); 4] =
runtime::CONNECTION_DURATION_STEPS;

/// Valid database connection role/step/outcome terminal combinations.
pub const DB_CONNECTION_TERMINALS: [(DbPoolRole, DbConnectionStep, DbConnectionOutcome); 15] =
runtime::CONNECTION_TERMINALS;

/// Raw Prometheus series ceiling per pod for connection-step telemetry.
pub const DB_CONNECTION_RAW_SERIES_PER_POD: usize = runtime::CONNECTION_RAW_SERIES_PER_POD;
pub(crate) use runtime::{
insert_mentions_in_transaction, observability, route_proof, ReadSessionInner, RouteDecision,
RoutePredicate,
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