Enum XdsError 

pub enum XdsError {
    InvalidTypeUrl {
        type_url: String,
        reason: String,
    },
    ResourceNotFound {
        type_url: String,
        name: String,
    },
    VersionMismatch {
        type_url: String,
        name: String,
        expected: String,
        actual: String,
    },
    InvalidResource {
        type_url: String,
        name: String,
        reason: String,
    },
    CacheError {
        message: String,
        source: Option<Box<dyn Error + Send + Sync>>,
    },
    WatchError {
        message: String,
    },
    SnapshotIncomplete {
        missing_types: Vec<String>,
    },
    EncodingError {
        type_url: String,
        message: String,
    },
    DecodingError {
        type_url: String,
        message: String,
    },
    TransportError {
        message: String,
        source: Option<Box<dyn Error + Send + Sync>>,
    },
    StreamClosed {
        reason: String,
    },
    NackReceived {
        node_id: String,
        type_url: String,
        nonce: String,
        error_message: String,
    },
    Timeout {
        operation: String,
    },
    Shutdown,
    RateLimited {
        message: String,
    },
    Internal {
        message: String,
        source: Option<Box<dyn Error + Send + Sync>>,
    },
    WatchClosed {
        watch_id: u64,
    },
    Configuration(String),
}

Comprehensive error type for xDS operations.

This error type is designed to:

• Cover all failure modes without using panics
• Properly convert to tonic::Status for gRPC responses
• Provide detailed error messages for debugging
• Support error chaining via the source field

Example

use xds_core::XdsError;

fn validate_resource(name: &str) -> Result<(), XdsError> {
    if name.is_empty() {
        return Err(XdsError::InvalidResource {
            type_url: "type.googleapis.com/envoy.config.cluster.v3.Cluster".to_string(),
            name: name.to_string(),
            reason: "resource name cannot be empty".to_string(),
        });
    }
    Ok(())
}

Variants

InvalidTypeUrl

Malformed or unknown type URL.

Fields

type_url: String

The invalid type URL.

reason: String

Reason why the type URL is invalid.

ResourceNotFound

Requested resource doesn’t exist in the cache.

Fields

type_url: String

The type URL of the resource.

name: String

The name of the resource.

VersionMismatch

Version conflict during update.

Fields

type_url: String

The type URL of the resource.

name: String

The name of the resource.

expected: String

Expected version.

actual: String

Actual version received.

InvalidResource

Resource validation failed.

Fields

type_url: String

The type URL of the resource.

name: String

The name of the resource.

reason: String

Reason for validation failure.

CacheError

Cache operation failed.

Fields

message: String

Description of the cache error.

source: Option<Box<dyn Error + Send + Sync>>

Optional underlying error.

WatchError

Watch creation or notification failed.

Fields

message: String

Description of the watch error.

SnapshotIncomplete

Snapshot is incomplete - missing required resource types.

Fields

missing_types: Vec<String>

List of missing type URLs.

EncodingError

Protobuf encoding failed.

Fields

type_url: String

The type URL being encoded.

message: String

Error message.

DecodingError

Protobuf decoding failed.

Fields

type_url: String

The type URL being decoded.

message: String

Error message.

TransportError

gRPC transport error.

Fields

message: String

Error message.

source: Option<Box<dyn Error + Send + Sync>>

Optional underlying error.

StreamClosed

Client stream closed unexpectedly.

Fields

reason: String

Reason for stream closure.

NackReceived

Client rejected configuration (NACK).

Fields

node_id: String

The node ID that sent the NACK.

type_url: String

The type URL that was rejected.

nonce: String

The nonce of the rejected response.

error_message: String

Error message from the client.

Timeout

Operation timed out.

Fields

operation: String

Description of the operation that timed out.

Shutdown

Server is shutting down.

RateLimited

Too many requests (rate limited).

Fields

message: String

Rate limit message.

Internal

Unexpected internal error.

Fields

message: String

Error message.

source: Option<Box<dyn Error + Send + Sync>>

Optional underlying error.

WatchClosed

Watch subscription was closed.

Fields

watch_id: u64

ID of the closed watch.

Configuration(String)

Configuration error.

Implementations

impl XdsError

pub fn internal<E>(message: impl Into<String>, source: E) -> Self

where E: Error + Send + Sync + 'static,

Create an internal error from any error type.

pub fn cache<E>(message: impl Into<String>, source: E) -> Self

where E: Error + Send + Sync + 'static,

Create a cache error from any error type.

pub fn transport<E>(message: impl Into<String>, source: E) -> Self

where E: Error + Send + Sync + 'static,

Create a transport error from any error type.

Trait Implementations

impl Debug for XdsError

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

Formats the value using the given formatter.

impl Display for XdsError

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

Formats the value using the given formatter.

impl Error for XdsError

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.

impl From<XdsError> for Status

Convert to tonic::Status for gRPC responses.

This implementation maps each error variant to an appropriate gRPC status code.

fn from(err: XdsError) -> Self

Converts to this type from the input type.