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CacheError

dig_store_cache

Enum CacheError 

Source 
pub enum CacheError {
    Io {
        path: PathBuf,
        source: Error,
    },
    EntryTooLarge {
        id: Box<CapsuleIdentity>,
        size: u64,
        capacity: u64,
    },
    IdentityMismatch {
        claimed: Box<CapsuleIdentity>,
        recovered: Box<CapsuleIdentity>,
    },
    CorruptEntry {
        path: PathBuf,
        reason: String,
    },
    RootNotWritable {
        root: PathBuf,
        source: Error,
    },
}
Expand description

A failure of a cache operation.

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Io

A filesystem operation failed. Carries the path it was acting on so the fault is locatable.

Fields

§path: PathBuf

The path the failing operation touched.

§source: Error

The underlying OS error.

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EntryTooLarge

A single capsule is larger than the whole cache capacity. Admitting it would require evicting everything and STILL not fit, so it is rejected outright — nothing is evicted for a doomed put.

Fields

§id: Box<CapsuleIdentity>

The capsule that could never fit.

§size: u64

Its size in bytes.

§capacity: u64

The cache’s total capacity in bytes.

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IdentityMismatch

PutOptions::check_identity was set and the bytes’ recovered (store_id, root_hash) did not equal the claimed identity. The bytes are NOT admitted.

Fields

§claimed: Box<CapsuleIdentity>

The identity the caller passed to put (boxed — see CacheError::EntryTooLarge).

§recovered: Box<CapsuleIdentity>

The identity recovered from the bytes.

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CorruptEntry

A cached .dig file could not be read back as a capsule (during open orphan recovery, or a check_identity read of unparseable bytes). Disk stays authoritative — the entry is skipped.

Fields

§path: PathBuf

The offending file.

§reason: String

Why it could not be read as a capsule.

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RootNotWritable

The cache root cannot be created or written to (bad path, permissions, read-only volume).

Fields

§root: PathBuf

The root directory the caller passed to Cache::open.

§source: Error

The underlying OS error.

Trait Implementations§

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impl Debug for CacheError

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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 CacheError

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

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

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

Returns the lower-level source of this error, if any. Read more
1.0.0 · Source§

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

Read more
1.0.0 · Source§

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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