dfx 1.0.0-beta

A FIX protocol implementation
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
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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171

use dfx_base::field_map::FieldMapError;
use dfx_base::message::Message;
use dfx_base::session_id::SessionId;

#[derive(Debug, Clone)]
pub enum ApplicationError {
    // DoNotAccept,
    // LogonReject,
    DoNotSend,
    FieldMapError(FieldMapError),
}

#[derive(Debug, Clone)]
pub enum FromAppError {
    UnknownMessageType { message: Message, msg_type: String },
    FieldMapError(FieldMapError),
}

#[derive(Debug, Clone)]
pub struct LogonReject {
    pub reason: Option<String>
}
#[derive(Debug, Clone)]
pub struct DoNotAccept;

impl From<FieldMapError> for ApplicationError {
    fn from(e: FieldMapError) -> Self {
        ApplicationError::FieldMapError(e)
    }
}

impl From<FieldMapError> for FromAppError {
    fn from(e: FieldMapError) -> Self {
        FromAppError::FieldMapError(e)
    }
}

pub trait Application: Send {
    fn on_create(&mut self, session_id: &SessionId) -> Result<(), DoNotAccept>;
    fn on_logon(&mut self, session_id: &SessionId) -> Result<(), LogonReject>;
    fn on_logout(&mut self, session_id: &SessionId) -> Result<(), ApplicationError>;
    fn to_admin(
        &mut self,
        message: Message,
        session_id: &SessionId,
    ) -> Result<Message, FieldMapError>;
    fn from_admin(
        &mut self,
        message: &Message,
        session_id: &SessionId,
    ) -> Result<(), FieldMapError>;
    fn to_app(
        &mut self,
        message: &mut Message,
        session_id: &SessionId,
    ) -> Result<(), ApplicationError>;
    fn from_app(
        &mut self,
        message: &Message,
        session_id: &SessionId,
    ) -> Result<(), FromAppError>;
}

pub trait ApplicationExt: Application {
    fn early_intercept(
        &mut self,
        message: Message,
        session_id: &SessionId,
    ) -> Result<Message, ApplicationError>;
}

#[cfg(test)]
pub mod tests {
    use dfx_base::session_id::SessionId;

    use super::{Application, ApplicationExt, DoNotAccept, LogonReject};
    use dfx_base::message::Message;
    use crate::session;

    pub struct TestApplication;

    impl Application for TestApplication {
        fn on_create(
            &mut self,
            _session_id: &SessionId,
        ) -> Result<(), DoNotAccept> {
            Ok(())
        }

        fn on_logon(
            &mut self,
            _session_id: &SessionId,
        ) -> Result<(), LogonReject> {
            Ok(())
        }

        fn on_logout(
            &mut self,
            _session_id: &SessionId,
        ) -> Result<(), super::ApplicationError> {
            Ok(())
        }

        fn to_admin(
            &mut self,
            message: Message,
            _session_id: &SessionId,
        ) -> Result<Message, dfx_base::field_map::FieldMapError> {
            Ok(message)
        }

        fn from_admin(
            &mut self,
            _message: &Message,
            _session_id: &SessionId,
        ) -> Result<(), dfx_base::field_map::FieldMapError> {
            Ok(())
        }

        fn to_app(
            &mut self,
            _message: &mut Message,
            _session_id: &SessionId,
        ) -> Result<(), super::ApplicationError> {
            Ok(())
        }

        fn from_app(
            &mut self,
            _message: &Message,
            _session_id: &SessionId,
        ) -> Result<(), super::FromAppError> {
            Ok(())
        }
    }

    #[test]
    fn test_inject() {
        let session_id = SessionId::new("", "", "", "", "", "", "");
        let mut app = TestApplication {};
        let msg = Message::default();
        let res = app.to_admin(msg, &session_id);
        assert!(res.is_ok());
        let _res = res.unwrap();
        let msg = Message::default();
        //msg.c = true;
        let res = app.to_admin(msg, &session_id);
        assert!(res.is_ok());
        let _res = res.unwrap();
        //assert!(res.a == 1234);
    }

    impl ApplicationExt for TestApplication {
        fn early_intercept(
            &mut self,
            message: Message,
            _session_id: &SessionId,
        ) -> Result<Message, super::ApplicationError> {
            Ok(message)
        }
    }
    #[test]
    fn test_ext() {
        // let app = TestApplication {};
        // let boxed: Box<dyn Application> = Box::new(app);
        // let early = super::get_early_intercept(boxed.as_ref());
        // let session_id = SessionId::default();
        // let msg = Message::default();
        // early.unwrap()(boxed.as_mut(), msg, &session_id);
    }
}