vv-agent 0.7.1

VectorVein agent runtime, SDK, CLI, tools, and workspace backends
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

use std::collections::HashSet;

use tokio::sync::mpsc;

use crate::app_server::outgoing::OutgoingEnvelope;
use crate::app_server::processor::MessageProcessor;
use crate::app_server::protocol::{AppServerError, RequestId};
use crate::app_server::transport::{
    AppServerTransport, ConnectionId, TransportConnectionMode, TransportEvent,
};

pub struct AppServer<T: AppServerTransport> {
    transport: T,
    processor: MessageProcessor,
    outgoing: mpsc::Receiver<OutgoingEnvelope>,
}

impl<T: AppServerTransport> AppServer<T> {
    pub fn new(
        transport: T,
        processor: MessageProcessor,
        outgoing: mpsc::Receiver<OutgoingEnvelope>,
    ) -> Self {
        Self {
            transport,
            processor,
            outgoing,
        }
    }

    pub async fn run(&mut self) -> Result<(), AppServerError> {
        let mut open_connections = HashSet::new();
        let mut disconnected_connections = HashSet::new();
        loop {
            tokio::select! {
                biased;
                envelope = self.outgoing.recv() => {
                    let Some(envelope) = envelope else {
                        self.disconnect_all(&mut open_connections).await;
                        return Ok(());
                    };
                    if !self
                        .processor
                        .outgoing()
                        .is_connection_registered(envelope.connection_id)
                        .await
                    {
                        continue;
                    }
                    if let Err(error) = self.transport
                        .send(envelope.connection_id, envelope.message)
                        .await
                    {
                        disconnected_connections.insert(envelope.connection_id);
                        self.disconnect_connection(&mut open_connections, envelope.connection_id)
                            .await;
                        if self.transport.connection_mode() == TransportConnectionMode::Single {
                            self.disconnect_all(&mut open_connections).await;
                            return Err(error);
                        }
                    }
                }
                event = self.transport.next_event() => {
                    match event {
                        Some(Ok(TransportEvent::Opened { connection_id })) => {
                            disconnected_connections.remove(&connection_id);
                            open_connections.insert(connection_id);
                            self.processor
                                .outgoing()
                                .register_connection(connection_id)
                                .await;
                        }
                        Some(Ok(TransportEvent::Message {
                            connection_id,
                            message,
                        })) => {
                            if disconnected_connections.contains(&connection_id) {
                                continue;
                            }
                            open_connections.insert(connection_id);
                            self.processor.process_message(connection_id, message).await;
                        }
                        Some(Ok(TransportEvent::ProtocolError {
                            connection_id,
                            error,
                        })) => {
                            if disconnected_connections.contains(&connection_id) {
                                continue;
                            }
                            open_connections.insert(connection_id);
                            self.processor
                                .outgoing()
                                .register_connection(connection_id)
                                .await;
                            let _ = self
                                .processor
                                .outgoing()
                                .send_error(connection_id, RequestId::Null, error)
                                .await;
                        }
                        Some(Ok(TransportEvent::Closed { connection_id })) => {
                            disconnected_connections.insert(connection_id);
                            self.disconnect_connection(&mut open_connections, connection_id).await;
                        }
                        Some(Err(error)) => {
                            self.disconnect_all(&mut open_connections).await;
                            return Err(error);
                        }
                        None => {
                            self.disconnect_all(&mut open_connections).await;
                            return Ok(());
                        }
                    }
                }
            }
        }
    }

    pub fn processor(&self) -> &MessageProcessor {
        &self.processor
    }

    async fn disconnect_connection(
        &mut self,
        open_connections: &mut HashSet<ConnectionId>,
        connection_id: ConnectionId,
    ) {
        open_connections.remove(&connection_id);
        self.processor.disconnect_connection(connection_id).await;
    }

    async fn disconnect_all(&mut self, open_connections: &mut HashSet<ConnectionId>) {
        let mut connection_ids = std::mem::take(open_connections);
        connection_ids.extend(self.processor.connection_ids());
        for connection_id in connection_ids {
            self.processor.disconnect_connection(connection_id).await;
        }
    }
}