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
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105

use std::ops::Deref;
use std::ops::DerefMut;

pub use sea_streamer::Message;
pub use sea_streamer::MessageHeader;
pub use sea_streamer::SeaMessage;
pub use sea_streamer::SeqNo;
pub use sea_streamer::ShardId;
pub use sea_streamer::SharedMessage;
pub use sea_streamer::StreamKey;
pub use sea_streamer::Timestamp;
use spring_boot::app::App;

pub trait FromMsg {
    fn from_msg(msg: &SeaMessage, app: &App) -> Self;
}

impl FromMsg for StreamKey {
    fn from_msg(msg: &SeaMessage, _app: &App) -> Self {
        msg.stream_key()
    }
}

impl FromMsg for SeqNo {
    fn from_msg(msg: &SeaMessage, _app: &App) -> Self {
        msg.sequence()
    }
}

impl FromMsg for ShardId {
    fn from_msg(msg: &SeaMessage, _app: &App) -> Self {
        msg.shard_id()
    }
}

impl FromMsg for Timestamp {
    fn from_msg(msg: &SeaMessage, _app: &App) -> Self {
        msg.timestamp()
    }
}

impl FromMsg for MessageHeader {
    fn from_msg(msg: &SeaMessage, _app: &App) -> Self {
        MessageHeader::new(
            msg.stream_key(),
            msg.shard_id(),
            msg.sequence(),
            msg.timestamp(),
        )
    }
}

impl FromMsg for SharedMessage {
    fn from_msg(msg: &SeaMessage, _app: &App) -> Self {
        msg.to_owned()
    }
}

pub struct Component<T>(pub T);

impl<T> FromMsg for Component<T>
where
    T: Clone + Send + Sync + 'static,
{
    fn from_msg(_msg: &SeaMessage, app: &App) -> Self {
        match app.get_component::<T>() {
            Some(component) => Component(T::clone(&component)),
            None => panic!(
                "There is no component of `{}` type",
                std::any::type_name::<T>()
            ),
        }
    }
}

impl<T> Deref for Component<T> {
    type Target = T;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl<T> DerefMut for Component<T> {
    fn deref_mut(&mut self) -> &mut Self::Target {
        &mut self.0
    }
}

#[cfg(feature = "json")]
pub struct Json<T>(pub T);

#[cfg(feature = "json")]
impl<T> FromMsg for Json<T>
where
    T: serde::de::DeserializeOwned,
{
    fn from_msg(msg: &SeaMessage, _app: &App) -> Self {
        let value = msg
            .message()
            .deserialize_json()
            .expect("stream message parse as json failed");
        Json(value)
    }
}