Pyro4 client (Proxy) and server (Daemon) for node.js v2.4.0

Connect to Pyro4 objects using node.js, using the Pyro4 JSON serializer.

Usage

Client-side

// basic-proxy.js

const { Proxy } = require("./../index.js")

var main = async ()=>{
    var p = new Proxy("Pyro:BasicServer@localhost:50001")
    await p.init()
    console.log(await p.square([2]))
    console.log(await p.name.get())
    await p.end()
}

main()

In order to avoid having to call Proxy.init and Proxy.end, use the the Proxy.with function:

// with-proxy.js
const { Proxy } = require("./../index.js")

var main = async ()=>{
    var uri = "Pyro:BasicServer@localhost:50001"
    await Proxy.with(uri, async (proxy)=>{
        console.log(await proxy.square([2]))
        console.log(await proxy.name.get())
        console.log(await proxy.echo(["hey there"]))
    })
}

main()

As of version 2.3.0, you can make batched calls. This is simply a matter of making a list of calls (really just Promises), and then awaiting Promise.all:

// proxy-batched.js
const { Proxy } = require("./../index.js")

var main = async ()=>{
    var uri = "Pyro:TestServer@localhost:50001"
    await Proxy.with(uri, async (proxy)=>{
        var calls = []
        for (let i=1; i<=100; i++){
            calls.push(proxy.square([i]))
        }
        var resp = await Promise.all(calls)
        console.log(resp)
    })
}

main()

Server-side

Launching name server:

me@local:~$ pyro4-node-ns

With nameserver running in background, we can register an object with a Daemon, and then with the NameServer:

// basic-server.js
const { locateNS, expose, Daemon, NameServerDaemon } = require("./../index.js")

class BasicServer{
    constructor(){
        this._name = "BasicServer"
    }

    get name(){
        return this._name
    }

    set name(value){
        this._name = value
    }

    square(x){
        return x**2
    }

    echo(val){
        return val
    }

    ping(){}
}

expose(BasicServer.prototype.echo)
expose(BasicServer.prototype.square)
expose(BasicServer, "name")

var main = async ()=>{
    var server = new BasicServer()
    // We're going to register our server object on port 50002
    var daemon = new Daemon({host: "localhost", port: 50002})
    var uri = daemon.register(server)
    // with name server running, assuming it's running on port 9090
    await locateNS(async (ns)=>{
        var resp = await ns.register(["BasicServer", uri.str])
    })
    console.log(`Server's URI is ${uri.str}`)
    await daemon.init()
}

main()

Acknowledgements

Pyro4 is developed by Irmen de Jong. See here for Pyro4's license.