libsql 0.9.18

The libSQL database library
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
68
69
70
71
72
73
74

use crate::{
    local::{self},
    params::Params,
    statement::Stmt,
    sync::SyncContext, Column, Result, Rows, Statement,
};
use std::sync::{atomic::{AtomicBool, Ordering}, Arc};
use tokio::sync::Mutex;

pub struct SyncedStatement {
    pub conn: local::Connection,
    pub inner: Statement,
    pub context: Arc<Mutex<SyncContext>>,
    pub needs_pull: Arc<AtomicBool>,
}

#[async_trait::async_trait]
impl Stmt for SyncedStatement {
    fn finalize(&mut self) {
        self.inner.finalize()
    }

    async fn execute(&mut self, params: &Params) -> Result<usize> {
        if self.needs_pull.load(Ordering::Relaxed) {
            let mut context = self.context.lock().await;
            crate::sync::try_pull(&mut context, &self.conn).await?;
            self.needs_pull.store(false, Ordering::Relaxed);
        }
        self.inner.execute(params).await
    }

    async fn query(&mut self, params: &Params) -> Result<Rows> {
        if self.needs_pull.load(Ordering::Relaxed) {
            let mut context = self.context.lock().await;
            crate::sync::try_pull(&mut context, &self.conn).await?;
            self.needs_pull.store(false, Ordering::Relaxed);
        }
        self.inner.query(params).await
    }

    async fn run(&mut self, params: &Params) -> Result<()> {
        if self.needs_pull.load(Ordering::Relaxed) {
            let mut context = self.context.lock().await;
            crate::sync::try_pull(&mut context, &self.conn).await?;
            self.needs_pull.store(false, Ordering::Relaxed);
        }
        self.inner.run(params).await
    }

    fn interrupt(&mut self) -> Result<()> {
        self.inner.interrupt()
    }

    fn reset(&mut self) {
        self.inner.reset()
    }

    fn parameter_count(&self) -> usize {
        self.inner.parameter_count()
    }

    fn parameter_name(&self, idx: i32) -> Option<&str> {
        self.inner.parameter_name(idx)
    }

    fn column_count(&self) -> usize {
        self.inner.column_count()
    }

    fn columns(&self) -> Vec<Column> {
        self.inner.columns()
    }
}