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
172
173
174
175

use std::collections::HashMap;
use std::hash::{Hash, Hasher};
use std::str::FromStr;
use std::net::SocketAddr;
use std::marker::PhantomData;

use config::Config;
use log::{error, trace, warn};

use crate::protocol::{Message, ActorMsg, IOMsg};
use crate::actors::{Actor, ActorRef, Context, Tell, BoxActor, BoxActorProd, Props, ActorRefFactory};

pub struct Io<Msg: Message> {
    managers: HashMap<IoType, ActorRef<Msg>>,
}

impl<Msg> Actor for Io<Msg>
    where Msg: Message
{
    type Msg = Msg;

    fn other_receive(&mut self, ctx: &Context<Msg>, msg: ActorMsg<Msg>, sender: Option<ActorRef<Msg>>) {
        if let ActorMsg::IO(msg) = msg {
            match msg {
                IOMsg::Manage(io_type, props) => self.register_io_manager(ctx, io_type, props),
                _ => self.foward(msg, sender)
            }
        }
    }

    fn receive(&mut self, _: &Context<Msg>, _: Msg, _: Option<ActorRef<Msg>>) {}
}

impl<Msg> Io<Msg>
    where Msg: Message
{
    pub fn props() -> BoxActorProd<Msg> {
        Props::new(Box::new(Io::actor))
    }

    pub fn actor() -> BoxActor<Msg> {
        let actor = Io {
            managers: HashMap::new()
        };

        Box::new(actor)
    }

    fn register_io_manager(&mut self, ctx: &Context<Msg>, io_type: IoType, props: BoxActorProd<Msg>) {
        let name = String::from(io_type.clone());

        match ctx.actor_of(props, name.as_ref()) {
            Ok(actor) => {
                trace!("Registering IO manager {:?}", io_type);
                self.managers.insert(io_type, actor);
            }
            Err(_) => {
                error!("Failed to register IO manager for {:?}", io_type);
            }
        }
    }

    fn foward(&mut self, msg: IOMsg<Msg>, sender: Option<ActorRef<Msg>>) {
        match msg {
            IOMsg::Connect(io_type, addr) => {
                match self.managers.get(&io_type) {
                    Some(manager) => {
                        manager.tell(IOMsg::Connect(io_type, addr), sender);
                    }
                    None => warn!("No IO manager for type {:?}", io_type)
                }
            }
            IOMsg::Bind(io_type, addr, handler) => {
                match self.managers.get(&io_type) {
                    Some(manager) => 
                    {
                        manager.tell(IOMsg::Bind(io_type, addr, handler), sender);
                    }
                    None => warn!("No IO manager for type {:?}", io_type) // todo handle better
                };
            }
            _ => {}
        }
    }
}

#[derive(Clone, Debug, PartialEq)]
pub struct IoType(String);

impl<'a> From<&'a str> for IoType {
    fn from(t: &str) -> Self {
        IoType(t.to_string())
    }
}

impl Eq for IoType {}

impl Hash for IoType {
    fn hash<H: Hasher>(&self, state: &mut H) {
        self.0.hash(state);
    }
}

impl From<IoType> for String {
    fn from(t: IoType) -> String {
        t.0
    }
}

impl<'a> From<&'a IoType> for &'a str {
    fn from(t: &'a IoType) -> &'a str {
        t.0.as_ref()
    }
}

// standard types
pub struct Tcp;

impl From<Tcp> for IoType {
    fn from(_: Tcp) -> Self {
        IoType::from("tcp")
    }
}

pub struct Udp; 

impl From<Udp> for IoType {
    fn from(_: Udp) -> Self {
        IoType::from("udp")
    }
}

pub trait IoManagerProps {
    type Msg: Message;

    fn props(config: &Config) -> Option<BoxActorProd<Self::Msg>>;
}


#[derive(Clone, Debug, PartialEq)]
pub struct IoAddress(pub String);

impl FromStr for IoAddress {
    type Err = String;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        let addr = IoAddress(s.to_string());
        Ok(addr)
    }
}

impl From<SocketAddr> for IoAddress {
    fn from(addr: SocketAddr) -> IoAddress {
        IoAddress(format!("{}", addr))
    }
}

pub struct NoIo<Msg: Message> {
    x: PhantomData<Msg>,
}

impl<Msg> IoManagerProps for NoIo<Msg>
    where Msg: Message
{
    type Msg = Msg;

    fn props(_: &Config) -> Option<BoxActorProd<Msg>> {
        None
    }
}