hash-engine 0.2.0

An Engula engine that provides simple key-value storage.
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// Copyright 2021 The Engula Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use engula_journal::Error as JournalError;
use engula_kernel::Error as KernelError;
use engula_storage::Error as StorageError;
use thiserror::Error;

#[derive(Error, Debug)]
pub enum Error {
    #[error(transparent)]
    Io(#[from] std::io::Error),
    #[error("corrupted: {0}")]
    Corrupted(String),
    #[error(transparent)]
    Kernel(#[from] KernelError),
    #[error(transparent)]
    Journal(#[from] JournalError),
    #[error(transparent)]
    Storage(#[from] StorageError),
}

impl Error {
    pub fn corrupted<E: ToString>(err: E) -> Self {
        Self::Corrupted(err.to_string())
    }
}

pub type Result<T> = std::result::Result<T, Error>;