Struct rocket::Error

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pub struct Error { /* private fields */ }
Expand description

An error that occurred during launch or ignition.

An Error is returned by Rocket::launch() or Rocket::ignite() on failure to launch or ignite, respectively. An Error may occur when the configuration is invalid, when a route or catcher collision is detected, or when a fairing fails to launch. An Error may also occur when the Rocket instance fails to liftoff or when the Rocket instance fails to shutdown. Finally, an Error may occur when a sentinel requests an abort.

To determine the kind of error that occurred, use Error::kind().

§Example

use rocket::trace::Trace;
use rocket::error::ErrorKind;

if let Err(e) = rocket::build().ignite().await {
    match e.kind() {
        ErrorKind::Bind(_, e) => info!("binding failed: {}", e),
        ErrorKind::Io(e) => info!("I/O error: {}", e),
        _ => e.trace_error(),
    }

    return Err(e);
}

Implementations§

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impl Error

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pub fn kind(&self) -> &ErrorKind

Returns the kind of error that occurred.

§Example
use rocket::trace::Trace;
use rocket::error::ErrorKind;

if let Err(e) = rocket::build().ignite().await {
    match e.kind() {
        ErrorKind::Bind(_, e) => info!("binding failed: {}", e),
        ErrorKind::Io(e) => info!("I/O error: {}", e),
        _ => e.trace_error(),
   }
}
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pub fn report<P: Phase>(result: Result<Rocket<P>, Error>) -> ExitCode

Given the return value of Rocket::launch() or Rocket::ignite(), which return a Result<Rocket<P>, Error>, logs the error, if any, and returns the appropriate exit code.

For Ok(_), returns ExitCode::SUCCESS. For Err(e), logs the error and returns ExitCode::FAILURE.

§Example
use std::process::ExitCode;
use rocket::error::Error;

async fn run() -> ExitCode {
    Error::report(rocket::build().launch().await)
}

Trait Implementations§

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impl Debug for Error

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

Formats the value using the given formatter. Read more
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impl Display for Error

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

Formats the value using the given formatter. Read more
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impl Error for Error

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

The lower-level source of this error, if any. Read more
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fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()
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fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
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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. Read more
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impl From<Error> for Error

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fn from(e: Error) -> Self

Converts to this type from the input type.
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impl From<Error> for Error

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fn from(e: Error) -> Self

Converts to this type from the input type.
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impl From<ErrorKind> for Error

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fn from(kind: ErrorKind) -> Self

Converts to this type from the input type.
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impl Trace for Error

Auto Trait Implementations§

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impl Freeze for Error

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impl !RefUnwindSafe for Error

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impl Send for Error

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impl !Sync for Error

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impl Unpin for Error

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impl !UnwindSafe for Error

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