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
75
76
77
78
79
80
81
82
83
84
use crate::item::{Item, Name, NamedItem};
/// A list of request handler results.
#[derive(Debug, PartialEq, Eq)]
#[non_exhaustive]
pub enum Event {
Success,
/// The named buffer is now empty.
Empty(Name),
/// The named buffer is used.
Used(Name),
/// The named buffer wrote(can be dirty; implementation may return before fdatasync).
ItemWrote(Name),
/// Named item got.
ItemGot(NamedItem),
/// Nothing to get or nothing to remove.
NoEntry(Name),
/// Unable to push an item(storage or buffer full).
TooManyItemsAlready,
/// Unexpected error(unable to check item existence, ...).
NoPerm(String),
/// Specified name already exists(retry with next name).
Again,
/// Invalid request
BadRequest,
/// Item names got.
NamesGot(Vec<Name>),
/// Item got, but its contents broken(power failure?).
Broken(Name),
/// Broken items removed.
BrokenItemsRemoved(u64),
/// Item got, but unreadable(bit rot?).
InvalidItem(String),
UnexpectedError(String),
}
impl TryFrom<Event> for Vec<Name> {
type Error = Event;
fn try_from(v: Event) -> Result<Self, Self::Error> {
match v {
Event::NamesGot(names) => Ok(names),
_ => Err(Event::BadRequest),
}
}
}
impl TryFrom<Event> for Item {
type Error = Event;
fn try_from(v: Event) -> Result<Self, Self::Error> {
match v {
Event::ItemGot(named) => Ok(named.into_item()),
_ => Err(Event::BadRequest),
}
}
}
impl TryFrom<Event> for Name {
type Error = Event;
fn try_from(v: Event) -> Result<Self, Self::Error> {
match v {
Event::Empty(name) => Ok(name),
Event::Used(name) => Ok(name),
Event::ItemWrote(name) => Ok(name),
Event::NoEntry(name) => Ok(name),
Event::Broken(name) => Ok(name),
Event::ItemGot(named) => Ok(Name::from(named)),
_ => Err(Event::BadRequest),
}
}
}