aion_server/
error.rs

1//! `ServerError` taxonomy for server library modules.
2
3use std::borrow::Cow;
4use std::net::SocketAddr;
5
6use aion::EngineError;
7use aion_proto::WireError;
8use aion_store::StoreError;
9use thiserror::Error;
10
11/// Server-library error taxonomy.
12#[derive(Debug, Error)]
13pub enum ServerError {
14    /// Operator configuration could not be loaded or validated.
15    #[error("configuration error: {message}")]
16    Config {
17        /// Redacted, operator-facing failure message.
18        message: String,
19    },
20
21    /// A transport listener could not bind or start.
22    #[error("{transport} transport failed at {address}: {message}")]
23    TransportBind {
24        /// Transport name.
25        transport: &'static str,
26        /// Configured listener address.
27        address: SocketAddr,
28        /// Redacted, operator-facing failure message.
29        message: String,
30    },
31
32    /// A running transport task aborted: it panicked or was cancelled.
33    #[error("{transport} transport task failed: {message}")]
34    Transport {
35        /// Transport name.
36        transport: &'static str,
37        /// Redacted, operator-facing failure message.
38        message: String,
39    },
40
41    /// A termination-signal listener could not be installed or failed.
42    #[error("{listener} listener failed: {message}")]
43    SignalListener {
44        /// Listener name (`SIGTERM`, `SIGINT`, or the portable fallback).
45        listener: &'static str,
46        /// Redacted, operator-facing failure message.
47        message: String,
48    },
49
50    /// Namespace validation or authorization failed.
51    #[error("namespace error: {message}")]
52    Namespace {
53        /// Redacted namespace failure message.
54        message: String,
55    },
56
57    /// Engine call failed.
58    #[error("engine call failed: {source}")]
59    EngineCall {
60        /// Typed engine error returned by the embedded engine.
61        #[from]
62        source: EngineError,
63    },
64
65    /// Store backend call failed before an engine handle was available.
66    #[error("store backend failed: {source}")]
67    StoreBackend {
68        /// Typed store error returned by the configured backend.
69        #[from]
70        source: StoreError,
71    },
72
73    /// Streaming failure.
74    #[error("stream failure: {failure}")]
75    Stream {
76        /// Stream failure class.
77        failure: StreamFailure,
78    },
79
80    /// A scheduled activity could not be pushed to a worker.
81    #[error(
82        "worker dispatch failed for namespace {namespace}, activity type {activity_type}: {reason}"
83    )]
84    WorkerDispatch {
85        /// Namespace scoped before dispatch.
86        namespace: String,
87        /// Activity type requested by the engine.
88        activity_type: String,
89        /// Redacted dispatch failure reason.
90        reason: String,
91    },
92
93    /// The worker connection chosen for a dispatch was lost mid-flight: the
94    /// connection was already gone at push time, or it closed before the worker
95    /// sent its correlated push reply.
96    ///
97    /// This is DISTINCT from [`Self::WorkerDispatch`]: a `WorkerDispatch` covers a
98    /// genuine reply timeout (the worker is alive but slow), a no-worker-available
99    /// selection failure, or any other dispatch fault, all of which keep the
100    /// outbox's normal exponential backoff. A `WorkerConnectionLost` instead means
101    /// the chosen worker is gone (and has already been deregistered by liminal's
102    /// `on_worker_unregistered`), so the row can be re-armed for IMMEDIATE re-claim
103    /// to fail over to a live worker without waiting out the backoff. The outbox
104    /// dispatcher keys its fast-failover decision on this variant.
105    #[error("worker connection lost during dispatch on {channel}: {detail}")]
106    WorkerConnectionLost {
107        /// Row-derived dispatch channel for operator diagnostics.
108        channel: String,
109        /// Redacted, operator-facing description of how the connection was lost.
110        detail: String,
111    },
112
113    /// A lock was poisoned and the protected state cannot be trusted.
114    #[error("{resource} lock was poisoned")]
115    LockPoisoned {
116        /// Protected resource name.
117        resource: &'static str,
118    },
119
120    /// A failure already translated into the public wire taxonomy.
121    #[error("wire error: {wire}")]
122    Wire {
123        /// Stable wire error.
124        wire: WireError,
125    },
126}
127
128/// Bounded-stream and connection failure classes.
129#[derive(Clone, Copy, Debug, Eq, Error, PartialEq)]
130pub enum StreamFailure {
131    /// Bounded per-connection buffer overflowed because the consumer lagged.
132    #[error("consumer lagged behind bounded buffer")]
133    Lagged,
134    /// Subscriber closed the connection.
135    #[error("subscriber connection closed")]
136    Closed,
137    /// Upstream engine event stream ended unexpectedly.
138    #[error("engine event stream closed")]
139    UpstreamClosed,
140}
141
142impl From<WireError> for ServerError {
143    fn from(wire: WireError) -> Self {
144        Self::Wire { wire }
145    }
146}
147
148impl ServerError {
149    /// Convert a server error that crosses a transport boundary into the stable
150    /// public wire taxonomy.
151    #[must_use]
152    pub fn to_wire_error(&self) -> WireError {
153        match self {
154            Self::Config { .. }
155            | Self::TransportBind { .. }
156            | Self::Transport { .. }
157            | Self::SignalListener { .. }
158            | Self::LockPoisoned { .. } => WireError::backend("server backend failure"),
159            Self::WorkerDispatch { .. } => WireError::backend("worker dispatch failed"),
160            Self::WorkerConnectionLost { .. } => {
161                WireError::backend("worker connection lost during dispatch")
162            }
163            Self::Namespace { message } => WireError::namespace_denied(message.clone()),
164            Self::EngineCall { source } => wire_from_engine(source),
165            Self::StoreBackend { source } => wire_from_store(source),
166            Self::Stream { failure } => match failure {
167                StreamFailure::Lagged => WireError::lagged("subscriber lagged behind"),
168                StreamFailure::Closed | StreamFailure::UpstreamClosed => {
169                    WireError::backend("event stream closed")
170                }
171            },
172            Self::Wire { wire } => wire.clone(),
173        }
174    }
175
176    /// Return true when this is an operator configuration failure.
177    #[must_use]
178    pub const fn is_config(&self) -> bool {
179        matches!(self, Self::Config { .. })
180    }
181
182    /// Construct a namespace-denied error without embedding authorization logic.
183    #[must_use]
184    pub fn namespace_denied(message: impl Into<String>) -> Self {
185        Self::Namespace {
186            message: message.into(),
187        }
188    }
189
190    /// Construct a deploy-authorization denial carried on the dedicated
191    /// `deploy_denied` wire code (deploy is not a namespace operation).
192    #[must_use]
193    pub fn deploy_denied(message: impl Into<String>) -> Self {
194        Self::Wire {
195            wire: WireError::deploy_denied(message),
196        }
197    }
198
199    /// Construct a lagged-stream error.
200    #[must_use]
201    pub const fn lagged_stream() -> Self {
202        Self::Stream {
203            failure: StreamFailure::Lagged,
204        }
205    }
206
207    /// Construct a worker-dispatch error.
208    #[must_use]
209    pub fn worker_dispatch(
210        namespace: impl Into<String>,
211        activity_type: impl Into<String>,
212        reason: impl Into<String>,
213    ) -> Self {
214        Self::WorkerDispatch {
215            namespace: namespace.into(),
216            activity_type: activity_type.into(),
217            reason: reason.into(),
218        }
219    }
220
221    /// Construct a worker-connection-lost error for a dispatch whose chosen
222    /// worker connection was gone at push time or closed before replying.
223    #[must_use]
224    pub fn worker_connection_lost(channel: impl Into<String>, detail: impl Into<String>) -> Self {
225        Self::WorkerConnectionLost {
226            channel: channel.into(),
227            detail: detail.into(),
228        }
229    }
230
231    /// Return true when this is a lost-worker-connection dispatch failure.
232    ///
233    /// The outbox dispatcher keys its fast cross-node failover on this: a lost
234    /// connection means the worker is gone (already deregistered), so the row is
235    /// re-armed for immediate re-claim instead of waiting out the retry backoff.
236    #[must_use]
237    pub const fn is_worker_connection_lost(&self) -> bool {
238        matches!(self, Self::WorkerConnectionLost { .. })
239    }
240
241    /// Construct a lock-poison error at the lock boundary.
242    #[must_use]
243    pub const fn lock_poisoned(resource: &'static str) -> Self {
244        Self::LockPoisoned { resource }
245    }
246}
247
248/// Stable structured error metadata for tracing events.
249#[derive(Clone)]
250pub struct ErrorTraceFields<'a> {
251    /// Outer error type recorded in the `error_type` tracing field.
252    pub error_type: Cow<'a, str>,
253    /// Optional inner store error type for `StoreError` records.
254    pub store_error_type: Option<&'static str>,
255    /// Human-readable reason safe for operator logs.
256    pub reason: &'a dyn std::fmt::Display,
257}
258
259impl ServerError {
260    /// Return stable typed fields for structured error logging.
261    #[must_use]
262    pub fn trace_fields(&self) -> ErrorTraceFields<'_> {
263        match self {
264            Self::Config { message } => ErrorTraceFields {
265                error_type: Cow::Borrowed("Config"),
266                store_error_type: None,
267                reason: message,
268            },
269            Self::TransportBind { message, .. } => ErrorTraceFields {
270                error_type: Cow::Borrowed("TransportBind"),
271                store_error_type: None,
272                reason: message,
273            },
274            Self::Transport { message, .. } => ErrorTraceFields {
275                error_type: Cow::Borrowed("Transport"),
276                store_error_type: None,
277                reason: message,
278            },
279            Self::SignalListener { message, .. } => ErrorTraceFields {
280                error_type: Cow::Borrowed("SignalListener"),
281                store_error_type: None,
282                reason: message,
283            },
284            Self::Namespace { message } => ErrorTraceFields {
285                error_type: Cow::Borrowed("Namespace"),
286                store_error_type: None,
287                reason: message,
288            },
289            Self::EngineCall { source } => engine_trace_fields(source),
290            Self::StoreBackend { source } => store_trace_fields(source),
291            Self::Stream { failure } => ErrorTraceFields {
292                error_type: Cow::Borrowed("Stream"),
293                store_error_type: None,
294                reason: failure,
295            },
296            Self::WorkerDispatch { reason, .. } => ErrorTraceFields {
297                error_type: Cow::Borrowed("WorkerDispatch"),
298                store_error_type: None,
299                reason,
300            },
301            Self::WorkerConnectionLost { detail, .. } => ErrorTraceFields {
302                error_type: Cow::Borrowed("WorkerConnectionLost"),
303                store_error_type: None,
304                reason: detail,
305            },
306            Self::LockPoisoned { resource } => ErrorTraceFields {
307                error_type: Cow::Borrowed("LockPoisoned"),
308                store_error_type: None,
309                reason: resource,
310            },
311            Self::Wire { wire } => ErrorTraceFields {
312                error_type: wire
313                    .error_type
314                    .as_deref()
315                    .map_or_else(|| Cow::Borrowed(wire.code.as_str()), Cow::Borrowed),
316                store_error_type: None,
317                reason: wire,
318            },
319        }
320    }
321}
322
323fn engine_trace_fields(source: &EngineError) -> ErrorTraceFields<'_> {
324    match source {
325        EngineError::WorkflowNotFound { .. } => simple_engine_fields("WorkflowNotFound", source),
326        EngineError::ScheduleNotFound { .. } => simple_engine_fields("ScheduleNotFound", source),
327        EngineError::ShuttingDown => simple_engine_fields("ShuttingDown", source),
328        EngineError::Store(store) => store_trace_fields(store),
329        EngineError::Durability(durability) => match durability {
330            aion::durability::DurabilityError::Store(store) => store_trace_fields(store),
331            aion::durability::DurabilityError::NonDeterminism(_)
332            | aion::durability::DurabilityError::HistoryShape { .. }
333            | aion::durability::DurabilityError::SearchAttribute(_) => {
334                simple_engine_fields("Durability", source)
335            }
336        },
337        EngineError::MissingStore => simple_engine_fields("MissingStore", source),
338        EngineError::MissingVisibilityStore => {
339            simple_engine_fields("MissingVisibilityStore", source)
340        }
341        EngineError::ConflictingEventPublisher => {
342            simple_engine_fields("ConflictingEventPublisher", source)
343        }
344        EngineError::EventStreaming(_) => simple_engine_fields("EventStreaming", source),
345        EngineError::Load { .. } => simple_engine_fields("Load", source),
346        EngineError::UnknownVersion { .. } => simple_engine_fields("UnknownVersion", source),
347        EngineError::VersionPinned { .. } => simple_engine_fields("VersionPinned", source),
348        EngineError::RouteActive { .. } => simple_engine_fields("RouteActive", source),
349        EngineError::ManifestMismatch { .. } => simple_engine_fields("ManifestMismatch", source),
350        EngineError::Package(_) => simple_engine_fields("Package", source),
351        EngineError::Schedule { .. } => simple_engine_fields("Schedule", source),
352        EngineError::Runtime { .. } => simple_engine_fields("Runtime", source),
353        EngineError::RegistryPoisoned => simple_engine_fields("RegistryPoisoned", source),
354        EngineError::CatalogPoisoned => simple_engine_fields("CatalogPoisoned", source),
355        EngineError::NifRegistration { .. } => simple_engine_fields("NifRegistration", source),
356        EngineError::SignalRouter(_) => simple_engine_fields("SignalRouter", source),
357        EngineError::Query(query) => simple_engine_fields(query_error_type(query), source),
358    }
359}
360
361/// Trace discriminator for live-query dispatch failures.
362fn query_error_type(source: &aion::QueryError) -> &'static str {
363    match source {
364        aion::QueryError::UnknownQuery(_) => "UnknownQuery",
365        aion::QueryError::Timeout => "QueryTimeout",
366        aion::QueryError::NotRunning(_) => "QueryNotRunning",
367        aion::QueryError::Unknown(_) => "QueryUnknownWorkflow",
368        aion::QueryError::ReplyDropped => "QueryReplyDropped",
369        aion::QueryError::HandlerFailed { .. } => "QueryFailed",
370        aion::QueryError::Engine(_) => "QueryEngine",
371    }
372}
373
374fn simple_engine_fields<'a>(
375    error_type: &'static str,
376    source: &'a EngineError,
377) -> ErrorTraceFields<'a> {
378    ErrorTraceFields {
379        error_type: Cow::Borrowed(error_type),
380        store_error_type: None,
381        reason: source,
382    }
383}
384
385fn store_trace_fields(source: &StoreError) -> ErrorTraceFields<'_> {
386    ErrorTraceFields {
387        error_type: Cow::Borrowed("StoreError"),
388        store_error_type: Some(store_error_type(source)),
389        reason: source,
390    }
391}
392
393fn store_error_type(source: &StoreError) -> &'static str {
394    match source {
395        StoreError::SequenceConflict { .. } => "SequenceConflict",
396        StoreError::NotFound { .. } => "NotFound",
397        StoreError::NotOwner { .. } => "NotOwner",
398        StoreError::Backend(_) => "Backend",
399        StoreError::Serialization(_) => "Serialization",
400    }
401}
402
403fn wire_from_engine(source: &EngineError) -> WireError {
404    match source {
405        EngineError::WorkflowNotFound { .. } => {
406            WireError::not_found_with_type("WorkflowNotFound", source.to_string())
407        }
408        EngineError::ScheduleNotFound { .. } => {
409            WireError::not_found_with_type("ScheduleNotFound", source.to_string())
410        }
411        EngineError::ShuttingDown => {
412            WireError::not_running_with_type("ShuttingDown", source.to_string())
413        }
414        EngineError::Store(store) => wire_from_store(store),
415        EngineError::Durability(durability) => match durability {
416            aion::durability::DurabilityError::Store(store) => wire_from_store(store),
417            aion::durability::DurabilityError::NonDeterminism(_)
418            | aion::durability::DurabilityError::HistoryShape { .. }
419            | aion::durability::DurabilityError::SearchAttribute(_) => {
420                WireError::backend_with_type("Durability", source.to_string())
421            }
422        },
423        EngineError::MissingStore => {
424            WireError::backend_with_type("MissingStore", source.to_string())
425        }
426        EngineError::MissingVisibilityStore => {
427            WireError::backend_with_type("MissingVisibilityStore", source.to_string())
428        }
429        EngineError::ConflictingEventPublisher => {
430            WireError::backend_with_type("ConflictingEventPublisher", source.to_string())
431        }
432        EngineError::EventStreaming(_) => {
433            WireError::backend_with_type("EventStreaming", source.to_string())
434        }
435        EngineError::Load { .. } => WireError::backend_with_type("Load", source.to_string()),
436        // Deploy-surface refusals (the §2.4 mapping table): unknown
437        // `(type, version)` is not-found; route-active and pinned versions
438        // are state conflicts carried by the dedicated `version_pinned`
439        // code; a same-hash-different-manifest archive is invalid input.
440        EngineError::UnknownVersion { .. } => {
441            WireError::not_found_with_type("UnknownVersion", source.to_string())
442        }
443        EngineError::VersionPinned { .. } => {
444            WireError::version_pinned(source.to_string()).with_error_type("VersionPinned")
445        }
446        EngineError::RouteActive { .. } => {
447            WireError::version_pinned(source.to_string()).with_error_type("RouteActive")
448        }
449        EngineError::ManifestMismatch { .. } => {
450            WireError::invalid_input(source.to_string()).with_error_type("ManifestMismatch")
451        }
452        EngineError::Package(_) => WireError::backend_with_type("Package", source.to_string()),
453        EngineError::Schedule { .. } => {
454            WireError::backend_with_type("Schedule", source.to_string())
455        }
456        EngineError::Runtime { .. } => WireError::backend_with_type("Runtime", source.to_string()),
457        EngineError::CatalogPoisoned => {
458            WireError::backend_with_type("CatalogPoisoned", source.to_string())
459        }
460        EngineError::RegistryPoisoned => {
461            WireError::backend_with_type("RegistryPoisoned", source.to_string())
462        }
463        EngineError::NifRegistration { .. } => {
464            WireError::backend_with_type("NifRegistration", source.to_string())
465        }
466        EngineError::SignalRouter(_) => {
467            WireError::backend_with_type("SignalRouter", source.to_string())
468        }
469        EngineError::Query(query) => wire_from_query(query, source),
470    }
471}
472
473/// Wire mapping for live-query dispatch failures (per the #45 brief).
474///
475/// `ReplyDropped` maps to `not_running` per decision Q3: the workflow ended
476/// before answering. `HandlerFailed` maps to the dedicated `query_failed`
477/// code per decision Q1(b).
478fn wire_from_query(query: &aion::QueryError, source: &EngineError) -> WireError {
479    match query {
480        aion::QueryError::UnknownQuery(_) => WireError::unknown_query(source.to_string()),
481        aion::QueryError::Timeout => WireError::query_timeout(source.to_string()),
482        aion::QueryError::NotRunning(_) | aion::QueryError::ReplyDropped => {
483            WireError::not_running_with_type(query_error_type(query), source.to_string())
484        }
485        aion::QueryError::Unknown(_) => {
486            WireError::not_found_with_type(query_error_type(query), source.to_string())
487        }
488        aion::QueryError::HandlerFailed { .. } => {
489            WireError::query_failed(source.to_string()).with_error_type(query_error_type(query))
490        }
491        aion::QueryError::Engine(_) => {
492            WireError::backend_with_type(query_error_type(query), source.to_string())
493        }
494    }
495}
496
497fn wire_from_store(source: &StoreError) -> WireError {
498    match source {
499        StoreError::SequenceConflict { .. } => WireError::new_with_type(
500            aion_proto::WireErrorCode::SequenceConflict,
501            "SequenceConflict",
502            source.to_string(),
503        ),
504        StoreError::NotFound { .. } => {
505            WireError::not_found_with_type("NotFound", source.to_string())
506        }
507        StoreError::NotOwner { .. } => {
508            WireError::not_owner(source.to_string()).with_error_type("NotOwner")
509        }
510        StoreError::Backend(_) => WireError::backend_with_type("Backend", source.to_string()),
511        StoreError::Serialization(_) => {
512            WireError::backend_with_type("Serialization", source.to_string())
513        }
514    }
515}
516
517#[cfg(test)]
518mod tests {
519    use super::{ServerError, StreamFailure};
520    use aion::{EngineError, QueryError, engine_seam::EngineSeamError};
521    use aion_core::WorkflowId;
522    use aion_proto::WireErrorCode;
523
524    fn assert_send_sync<T: Send + Sync>() {}
525
526    #[test]
527    fn server_error_is_send_sync() {
528        assert_send_sync::<ServerError>();
529    }
530
531    #[test]
532    fn lagged_stream_maps_to_wire_lagged() {
533        let error = ServerError::Stream {
534            failure: StreamFailure::Lagged,
535        };
536
537        assert_eq!(error.to_wire_error().code, WireErrorCode::Lagged);
538    }
539
540    /// R-0: a fenced quorum write (`StoreError::NotOwner`) must surface as the
541    /// typed, retryable `NotOwner` wire code with a `NotOwner` `error_type`, NOT
542    /// the opaque `Backend` it used to collapse into.
543    #[test]
544    fn not_owner_store_error_maps_to_wire_not_owner() {
545        let error = ServerError::StoreBackend {
546            source: aion_store::StoreError::NotOwner { shard: 3 },
547        };
548        let wire = error.to_wire_error();
549        assert_eq!(wire.code, WireErrorCode::NotOwner);
550        assert_eq!(wire.error_type.as_deref(), Some("NotOwner"));
551    }
552
553    fn workflow_id() -> WorkflowId {
554        WorkflowId::new(uuid::Uuid::from_u128(7))
555    }
556
557    fn query_wire(query: QueryError) -> aion_proto::WireError {
558        ServerError::EngineCall {
559            source: EngineError::Query(query),
560        }
561        .to_wire_error()
562    }
563
564    /// Pins the wire mapping for every `QueryError` arm (#45 decisions
565    /// Q1(b)/Q3): adding a variant breaks the exhaustive list below until its
566    /// mapping is decided and pinned here.
567    #[test]
568    fn every_query_error_arm_maps_to_its_pinned_wire_code() {
569        let arms: Vec<(QueryError, WireErrorCode, Option<&str>)> = vec![
570            (
571                QueryError::UnknownQuery(String::from("state")),
572                WireErrorCode::UnknownQuery,
573                None,
574            ),
575            (QueryError::Timeout, WireErrorCode::QueryTimeout, None),
576            (
577                QueryError::NotRunning(workflow_id()),
578                WireErrorCode::NotRunning,
579                Some("QueryNotRunning"),
580            ),
581            (
582                QueryError::Unknown(workflow_id()),
583                WireErrorCode::NotFound,
584                Some("QueryUnknownWorkflow"),
585            ),
586            // Q3: the workflow ended before answering — not_running, not backend.
587            (
588                QueryError::ReplyDropped,
589                WireErrorCode::NotRunning,
590                Some("QueryReplyDropped"),
591            ),
592            // Q1(b): the dedicated query_failed wire code.
593            (
594                QueryError::HandlerFailed {
595                    message: String::from("handler raised"),
596                },
597                WireErrorCode::QueryFailed,
598                Some("QueryFailed"),
599            ),
600            (
601                QueryError::Engine(EngineSeamError::Delivery {
602                    reason: String::from("mailbox closed"),
603                }),
604                WireErrorCode::Backend,
605                Some("QueryEngine"),
606            ),
607        ];
608
609        // Count-lock: the pin list must grow with the enum. The exhaustive
610        // match below numbers every variant; a new variant breaks the match
611        // first, and updating the match without pinning the new mapping
612        // breaks this assertion.
613        let variant_count = arms
614            .iter()
615            .map(|(query, _, _)| match query {
616                QueryError::UnknownQuery(_) => 0,
617                QueryError::Timeout => 1,
618                QueryError::NotRunning(_) => 2,
619                QueryError::Unknown(_) => 3,
620                QueryError::ReplyDropped => 4,
621                QueryError::HandlerFailed { .. } => 5,
622                QueryError::Engine(_) => 6,
623            })
624            .collect::<std::collections::BTreeSet<usize>>()
625            .len();
626        assert_eq!(
627            arms.len(),
628            variant_count,
629            "every QueryError variant must appear exactly once in the pin list",
630        );
631        assert_eq!(variant_count, 7, "pin list must cover all 7 variants");
632
633        for (query, expected_code, expected_type) in arms {
634            let wire = query_wire(query.clone());
635            assert_eq!(
636                wire.code, expected_code,
637                "{query:?} must map to {expected_code:?}",
638            );
639            assert_eq!(
640                wire.error_type.as_deref(),
641                expected_type,
642                "{query:?} must carry error_type {expected_type:?}",
643            );
644        }
645    }
646
647    /// The trace discriminator for `HandlerFailed` matches the wire
648    /// `error_type` so operators can correlate logs with client branches.
649    #[test]
650    fn handler_failed_trace_fields_use_query_failed_type() {
651        let error = ServerError::EngineCall {
652            source: EngineError::Query(QueryError::HandlerFailed {
653                message: String::from("handler raised"),
654            }),
655        };
656
657        assert_eq!(error.trace_fields().error_type, "QueryFailed");
658    }
659}
aion_server/error.rs

aion_server/
error.rs
