golang通过redis调用rust

Posted 2022-09-08 吴冬冬

golang的redis端

要注意的是要先订阅回复，然后再发送请求。

package main

import (
	"github.com/go-redis/redis"
)

var wait = make(chan interface)

func main() 
	client := redis.NewClient(&redis.Options
		Addr:     "xxxxxxxxx:6379",
		Password: "", // no password set
		DB:       0,  // use default DB
	)

	pubsub := client.Subscribe("sayhello_rsp")
	defer pubsub.Close()

	pubsub.Receive();
	go func() 
		ch := pubsub.Channel();
		select 
		case channel := <-ch:
			println(channel.Payload)
			wait <- 1
		
	()
	println("hello rust")
	client.Publish("sayhello_req", "hello rust")

	<-wait

rust端

rust作为被调用端订阅请求，rust将订阅到消息通知和处理分开，并且做成多线程处理。

use std::sync::mpsc;
use std::thread;
use std::sync::Arc;
use std::sync::Mutex;
use std::error::Error;

fn main() -> Result<(), Box<dyn Error>> 
    let client = redis::Client::open("redis://xxxxxxxx/")?;
    let mut con = client.get_connection()?;

    let mut pubsub = con.as_pubsub();
    pubsub.subscribe("sayhello_req")?;

    let (tx, rx) = mpsc::channel();
    let receiver = Arc::new(Mutex::new(rx));

    for _ in 1..10 
        let con2 = client.get_connection()?;
        let rx_arc = Arc::clone(&receiver);

        thread::spawn(move || 
            loop 
                let message = rx_arc.lock().unwrap().recv().unwrap();
                println!("payload : ", message);
                redis::cmd("PUBLISH").arg("sayhello_rsp").arg("hello go").execute(&con2);
            
        );
    

    loop 
        let msg = pubsub.get_message()?;
        let payload: String = msg.get_payload()?;
        tx.send(payload)?;
    

当然反过来也一样，但是基本go做前端api业务，然后rust做具体的底层实现。