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//
// imag - the personal information management suite for the commandline
// Copyright (C) 2015-2020 Matthias Beyer <mail@beyermatthias.de> and contributors
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; version
// 2.1 of the License.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
use std::sync::Mutex;
use std::sync::Arc;
use std::path::Path;
use failure::Fallible as Result;
use failure::Error;
use notmuch_rs::Database;
use notmuch_rs::DatabaseMode;
use libimagerror::errors::ErrorMsg;
#[derive(Debug)]
pub struct NotmuchConnection {
db: Arc<Mutex<Database>>,
}
impl NotmuchConnection {
pub fn open<P>(p: P) -> Result<Self>
where P: AsRef<Path>
{
Database::open(&p, DatabaseMode::ReadOnly)
.map(Mutex::new)
.map(Arc::new)
.map(|db| {
NotmuchConnection {
db
}
})
.map_err(Error::from)
}
pub(crate) fn execute<F>(&self, f: F) -> Result<()>
where F: FnOnce(&Database) -> Result<()>
{
self.db
.lock()
.map_err(|_| ErrorMsg::LockError)
.map_err(Error::from)
.and_then(|lock| f(&lock))
}
pub(crate) fn execute_atomic<F>(&self, f: F) -> Result<()>
where F: FnOnce(&Database) -> Result<()>
{
self.db
.lock()
.map_err(|_| ErrorMsg::LockError)
.map_err(Error::from)
.and_then(|lock| {
lock.begin_atomic()?;
let r = f(&lock);
lock.end_atomic()?;
r
})
}
}
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