possum-db 0.1.2

concurrent disk-backed cache supporting efficient direct file I/O, transactions, and snapshots using file cloning and sparse files
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

use thiserror::Error;

use super::*;

#[derive(Error, Debug)]
#[repr(C)]
pub enum Error {
    #[error("no such key")]
    NoSuchKey,
    #[error("sqlite error: {0:?}")]
    Sqlite(#[from] rusqlite::Error),
    #[error("io error: {0:?}")]
    Io(#[from] std::io::Error),
    #[error("anyhow: {0:?}")]
    Anyhow(#[from] anyhow::Error),
    #[error("unsupported filesystem")]
    UnsupportedFilesystem,
}

use Error::*;

impl Error {
    // This isn't great, since such an error could already be wrapped up in anyhow, or come from
    // Sqlite for example.
    pub(crate) fn is_file_already_exists(&self) -> bool {
        match self {
            Io(err) => err.kind() == ErrorKind::AlreadyExists,
            _ => false,
        }
    }
}