Enum GraphStoreError 

#[non_exhaustive]
pub enum GraphStoreError {
    ScopeUnservable {
        reason: String,
    },
    Unsupported {
        what: &'static str,
    },
    Validation {
        items: Vec<ItemError>,
    },
    Conflict {
        reason: String,
    },
    Serialization,
    StaleGeneration {
        recorded: i64,
        offered: i64,
    },
    IdempotencyMismatch,
    IdempotencyExpired,
    NotFound,
    LimitExceeded {
        what: String,
    },
    SourceNamespaceForbidden {
        namespace: String,
    },
    InvalidQuery {
        what: String,
    },
    Corrupt {
        reason: String,
    },
    Unavailable {
        reason: String,
    },
    Deadline,
    Cancelled,
    Internal(String),
}

Store-side failure vocabulary. The gear normalizes these into canonical errors before they cross the public boundary; no vendor text survives.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

ScopeUnservable

Request-level decline: this implementation cannot serve the compiled scope. Routed by the gateway, never surfaced to the caller directly.

Fields

reason: String

Unsupported

The capability is declared absent for this store.

Fields

what: &'static str

Validation

Per-item validation failures; the batch committed nothing.

Fields

items: Vec<ItemError>

Conflict

Same-key different-type ingest, expected-version mismatch, or an equal-generation replacement with different content.

Fields

reason: String

Serialization

Serialization failure under concurrent ingest; retry unchanged.

StaleGeneration

Older source generation for a scope; drop the stale run.

Fields

recorded: i64

offered: i64

IdempotencyMismatch

Idempotency key reused with a different request.

IdempotencyExpired

Receipt expired (or from a previous source epoch); reconcile first.

NotFound

Unauthorized or unknown resource — indistinguishable by contract.

LimitExceeded

A documented hard bound was exceeded.

Fields

what: String

SourceNamespaceForbidden

A write under a source namespace bound to another producer principal.

Deliberately not NotFound: everywhere else a denial is indistinguishable from absence (anti-enumeration), but here the caller named a namespace whose owner is a fact about the tenant, not about them, and telling them it does not exist would send them to create it. DESIGN § Error Model maps this to permission_denied / SOURCE_NAMESPACE_FORBIDDEN, “never retry; request ownership transfer”.

Fields

namespace: String

InvalidQuery

The query itself is malformed — an unknown filter field, an unparseable cursor, an ordering the store cannot serve. Distinct from LimitExceeded: nothing here is about a bound, and telling a caller “reduce the value” when they named a field that does not exist sends them the wrong way.

Fields

what: String

Corrupt

Durable corruption detected; operator action.

Fields

reason: String

Unavailable

Fields

reason: String

Deadline

Cancelled

Internal(String)

Unexpected failure; details stay in access-controlled logs.

Trait Implementations

impl Debug for GraphStoreError

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

Formats the value using the given formatter.

impl Display for GraphStoreError

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

Formats the value using the given formatter.

impl Error for GraphStoreError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.