Enum Error 

pub enum Error {
    AlreadyRunning,
    Namespace(Error),
    Cache(Error),
}

Comprehensive error types that can occur when using the Apollo client.

This enum covers all possible error conditions that may arise during client operations, from initialization and configuration to runtime cache operations and namespace handling.

Error Categories

• Client State Errors: Issues related to client lifecycle management
• Namespace Errors: Problems with namespace format detection and processing
• Cache Errors: Network, I/O, and caching-related failures

Examples

use apollo_rust_client::{Client, Error};

match client.namespace("application").await {
    Ok(namespace) => {
        // Handle successful namespace retrieval
    }
    Err(Error::Cache(cache_error)) => {
        // Handle cache-related errors (network, parsing, etc.)
        eprintln!("Cache error: {}", cache_error);
    }
    Err(Error::Namespace(namespace_error)) => {
        // Handle namespace-related errors (format detection, etc.)
        eprintln!("Namespace error: {}", namespace_error);
    }
    Err(e) => {
        // Handle other errors
        eprintln!("Error: {}", e);
    }
}

Variants

AlreadyRunning

The client background task is already running.

This error occurs when attempting to start a client that is already running its background refresh task. Each client instance can only have one active background task at a time.

Namespace(Error)

An error occurred during namespace processing.

This includes errors from format detection, parsing, or type conversion operations specific to namespace handling.

Cache(Error)

An error occurred during cache operations.

This encompasses network errors, I/O failures, serialization issues, and other cache-related problems during configuration retrieval or storage.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for JsValue

fn from(error: Error) -> Self

Converts to this type from the input type.