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
|
use std::{sync::Arc, time::Duration};
use serde::{Deserialize, Serialize};
use serde_json::Value;
use karyon_jsonrpc::{
message::SubscriptionID, rpc_impl, rpc_pubsub_impl, Channel, RPCError, Server,
};
struct Calc {
version: String,
}
#[derive(Deserialize, Serialize)]
struct Req {
x: u32,
y: u32,
}
#[derive(Deserialize, Serialize)]
struct Pong {}
#[rpc_impl]
impl Calc {
async fn ping(&self, _params: Value) -> Result<Value, RPCError> {
Ok(serde_json::json!(Pong {}))
}
async fn add(&self, params: Value) -> Result<Value, RPCError> {
let params: Req = serde_json::from_value(params)?;
Ok(serde_json::json!(params.x + params.y))
}
async fn sub(&self, params: Value) -> Result<Value, RPCError> {
let params: Req = serde_json::from_value(params)?;
Ok(serde_json::json!(params.x - params.y))
}
async fn version(&self, _params: Value) -> Result<Value, RPCError> {
Ok(serde_json::json!(self.version))
}
}
#[rpc_pubsub_impl]
impl Calc {
async fn log_subscribe(
&self,
chan: Arc<Channel>,
method: String,
_params: Value,
) -> Result<Value, RPCError> {
let sub = chan.new_subscription(&method).await;
let sub_id = sub.id;
tokio::spawn(async move {
loop {
tokio::time::sleep(std::time::Duration::from_secs(1)).await;
if sub.notify(serde_json::json!("Hello")).await.is_err() {
break;
}
}
});
Ok(serde_json::json!(sub_id))
}
async fn log_unsubscribe(
&self,
chan: Arc<Channel>,
_method: String,
params: Value,
) -> Result<Value, RPCError> {
let sub_id: SubscriptionID = serde_json::from_value(params)?;
chan.remove_subscription(&sub_id).await;
Ok(serde_json::json!(true))
}
}
#[tokio::main]
async fn main() {
env_logger::init();
// Register the Calc service
let calc = Arc::new(Calc {
version: String::from("0.1"),
});
// Creates a new server
let server = Server::builder("ws://127.0.0.1:6000")
.expect("Create a new server builder")
.service(calc.clone())
.pubsub_service(calc)
.build()
.await
.expect("start a new server");
// Start the server
server.start();
tokio::time::sleep(Duration::MAX).await;
}
|
