brec 0.3.0

A flexible binary format for storing and streaming structured data as packets with CRC protection and recoverability from corruption. Built for extensibility and robustness.
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

mod subscription;

use crate::*;
use std::{
    marker::PhantomData,
    path::{Path, PathBuf},
};

pub use subscription::*;

/// Builder options for creating [`FileObserverDef`](crate::storage::FileObserverDef).
pub struct FileObserverOptions<
    B: BlockDef + Send + 'static,
    BR: BlockReferredDef<B> + 'static,
    P: PayloadDef<Inner> + Send + 'static,
    Inner: PayloadInnerDef + Send + 'static,
    S: SubscriptionDef<B, BR, P, Inner, O> + 'static,
    O: Send + Sync + 'static,
> {
    /// Path to the observed storage file.
    pub path: PathBuf,
    /// Subscriber that receives observer callbacks.
    pub subscription: Option<S>,
    _phantom: PhantomData<(B, BR, P, Inner, O)>,
}

impl<
    B: BlockDef + Send + 'static,
    BR: BlockReferredDef<B> + 'static,
    P: PayloadDef<Inner> + Send + 'static,
    Inner: PayloadInnerDef + Send + 'static,
    S: SubscriptionDef<B, BR, P, Inner, O> + 'static,
    O: Send + Sync + 'static,
> FileObserverOptions<B, BR, P, Inner, S, O>
{
    /// Creates observer options for a target file path.
    pub fn new(path: impl AsRef<Path>) -> Self {
        Self {
            path: path.as_ref().to_path_buf(),
            subscription: None,
            _phantom: PhantomData,
        }
    }

    /// Attaches a subscription implementation used by the observer loop.
    pub fn subscribe(mut self, subscription: S) -> Self {
        self.subscription = Some(subscription);
        self
    }
}

impl<
    O: Send + Sync + 'static,
    B: BlockDef + Send + 'static,
    BR: BlockReferredDef<B> + 'static,
    P: PayloadDef<Inner> + Send + 'static,
    Inner: PayloadInnerDef + Send + 'static,
    S: SubscriptionDef<B, BR, P, Inner, O> + 'static,
> std::fmt::Debug for FileObserverOptions<B, BR, P, Inner, S, O>
{
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "FileObserverOptions: {}", self.path.display())
    }
}