ipc-bridge

communicate between multiple processes via publisher subscriber mechanism.

Prerequisites

you need to have node version 6 and above

Dependecies

lockfile v1.0.3

How it Works?

out of multiple clients, one of the clients will create the the server and rest of the clients will join the server. Any client process can communicate with any other process via events. In case of server process gets terminated then one of the other client process will try to create the server which depends on which client has aquired the lock first. Once the "old" server process comes back online it will join it as a client process and not the server process.

proc1 (client 1);

const Bridge = require("ipc-bridge");
let socketPath = "/tmp/mysocket.sock";
const bridge = new Bridge(socketPath) //in v1.0.0 Bridge.connect(socketPath)
bridge.subscribe("comic-con-day", (data)=>{
    //prints `Welcome the day`
    console.log(data)
    bridge.publish("superhero", "Batman");
})

proc2 (client 2)

const Bridge = require("ipc-bridge");
let socketPath = "/tmp/mysocket.sock";
const bridge = new Bridge(socketPath) //in v1.0.0 Bridge.connect(socketPath);

bridge.subscribe("superhero", (data)=>{
    //prints `I am Batman`
    //prints `I am Superman`
    console.log(`I am ${data}`);
    bridge.publish("comic-con-day", "Welcome the day");
});

proc3 (client 3)

const Bridge = require("ipc-bridge");
let socketPath = "/tmp/mysocket.sock";
const bridge = new Bridge(socketPath) //in v1.0.0 Bridge.connect(socketPath);

bridge.subscribe("comic-con-day", (data)=>{
    //prints `Welcome the day`
    console.log(data)
    bridge.publish("superhero", "superman");
});

In the above example lets say client 1 was the first one to boot up then client 2 and client 3 will join the bridge as clients and client 1 will become server. After sometime if client 1 leaves the bridge then one of the clent 2/client3 will become the server. Lets say client 3 has acquired the lock first then client 3 will become the server and client 2 will join it as a client. After sometime client 1 joins back then it will join the bridge as client.