stupid-simple-kv 0.3.3

A dead-simple, pluggable, binary-sorted key-value store for Rust with FoundationDB-style keys. In-memory and SQLite backends. Zero-boilerplate and easy iteration.
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
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67

use std::{
    error::Error,
    sync::{RwLockReadGuard, RwLockWriteGuard, TryLockError},
};

use crate::KvBackend;

#[derive(Debug)]
pub enum KvError {
    KeyDecodeError(String),
    InvalidSelector,
    ValEncodeError(bincode::error::EncodeError),
    ValDecodeError(bincode::error::DecodeError),
    ValDowncastError(String),
    Other(String),
    #[cfg(feature = "sqlite")]
    SqliteError(rusqlite::Error),
}

pub type KvResult<T> = Result<T, KvError>;

impl std::fmt::Display for KvError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            KvError::KeyDecodeError(str) => write!(f, "Error decoding key: {str}"),
            KvError::InvalidSelector => write!(
                f,
                "Invalid selector provided - Provide any one or two of start, end, prefix, not all"
            ),
            KvError::ValEncodeError(encode_error) => {
                write!(f, "Error encoding value with bincode: {encode_error}")
            }
            KvError::ValDecodeError(decode_error) => {
                write!(f, "Error decoding value with bincode: {decode_error}")
            }
            KvError::Other(str) => write!(f, "Error during kv op: {str}"),
            KvError::SqliteError(error) => write!(f, "rusqlite error: {error}"),
            KvError::ValDowncastError(s) => write!(f, "Error converting to KvValue: {s}"),
        }
    }
}

impl From<std::cell::BorrowError> for KvError {
    fn from(value: std::cell::BorrowError) -> Self {
        Self::Other(value.to_string())
    }
}

impl From<std::sync::PoisonError<&mut Box<dyn KvBackend>>> for KvError {
    fn from(value: std::sync::PoisonError<&mut Box<dyn KvBackend>>) -> Self {
        Self::Other(value.to_string())
    }
}

impl From<TryLockError<RwLockWriteGuard<'_, Box<dyn KvBackend>>>> for KvError {
    fn from(value: TryLockError<RwLockWriteGuard<Box<dyn KvBackend>>>) -> Self {
        Self::Other(value.to_string())
    }
}

impl From<TryLockError<RwLockReadGuard<'_, Box<dyn KvBackend>>>> for KvError {
    fn from(value: TryLockError<RwLockReadGuard<Box<dyn KvBackend>>>) -> Self {
        Self::Other(value.to_string())
    }
}

impl Error for KvError {}