Enum StateInitError 

#[non_exhaustive]
pub enum StateInitError {
    ReadOnlyCacheDirUnreadable {
        path: PathBuf,
        source: Error,
    },
    ReadOnlyDatabaseNotFound {
        path: PathBuf,
    },
    ReadOnlyEphemeralConflict,
}

An error describing why opening the finalized state database failed.

These errors are recoverable open-time failures that the caller can report, as opposed to invariant violations that indicate a bug.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

ReadOnlyCacheDirUnreadable

A read-only state was requested, but the configured cache directory is missing or unreadable.

A read-only secondary instance must never create the primary’s cache directory, so a missing or unreadable directory is a fatal configuration error rather than something to be created.

Fields

path: PathBuf

The configured cache directory that could not be read.

source: Error

The underlying I/O error returned while reading the directory.

ReadOnlyDatabaseNotFound

A read-only state was requested, but no database exists at the expected path.

A read-only secondary instance cannot create a database, so the absence of an existing database is a fatal configuration error.

Fields

path: PathBuf

The database path at which no database was found.

ReadOnlyEphemeralConflict

A read-only state was requested together with an ephemeral database.

A read-only secondary follows another process’s primary database and must never delete it, whereas an ephemeral database deletes its files on drop. The two are mutually exclusive, so requesting both is a fatal configuration error.

Trait Implementations

impl Debug for StateInitError

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

Formats the value using the given formatter.

impl Display for StateInitError

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

Formats the value using the given formatter.

impl Error for StateInitError

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.