Enum HealthError 

pub enum HealthError {
    UnknownEndpoint(String),
    HttpClientCreationFailed(String),
    InvalidEndpointUrl {
        endpoint: String,
        base_url: String,
        details: String,
    },
}

Errors that can occur during health checking operations

Variants

UnknownEndpoint(String)

Endpoint name not found in configuration

Indicates a programming error (endpoint name mismatch) or race condition (config reloaded during request). Should never occur under normal operation.

HttpClientCreationFailed(String)

Failed to create HTTP client for health checks

This indicates a systemic issue (TLS configuration error, resource exhaustion, library bug) rather than an individual endpoint failure. When this error occurs, ALL subsequent health checks will fail.

InvalidEndpointUrl

Invalid endpoint URL configuration

The base_url is malformed or contains invalid components (query parameters, fragments) that would cause health check failures. This is a configuration error.

Fields

endpoint: String

base_url: String

details: String

Implementations

impl HealthError

pub fn error_type(&self) -> &'static str

Get the error type as a string label for metrics

Returns a consistent snake_case string matching the error variant:

• UnknownEndpoint → “unknown_endpoint”
• HttpClientCreationFailed → “http_client_failed”
• InvalidEndpointUrl → “invalid_url”

Used for Prometheus metric labels to categorize health tracking failures.

Trait Implementations

impl Debug for HealthError

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

Formats the value using the given formatter.

impl Display for HealthError

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

Formats the value using the given formatter.

impl Error for HealthError

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<HealthError> for AppError

fn from(source: HealthError) -> Self

Converts to this type from the input type.