running node.js with forever to avoid crashing server
tillfly
Jul 31 2019 | 10:51 am
Hey,
i´m running a node.script which connects to a tcp server automatically after starting the max patch.
somehow the connection crashes after one to two hours. ( i can not be personally thats why i dont know exactly )
the patch runs as a standalone. the computer on which it runs was licensed in development but doesnt have a license right now, which should make no difference I think.
now I would like to run this code with forever to restart the node script immediatelly after crashing or figure out some other logic to restart after crashing...
how could I do this?
this is the node script:
// connection to max
const path = require('path');
const maxApi = require('max-api');
const net = require('net');
var socketClient;
var connected = false;
var chunk = "";
var delimiter = ';';
reconnect();
function reconnect()
{
reconnectTimer = setInterval(function()
{
/* Instance socket on create window */
console.log('Try to connect');
// maxApi.outlet('Try to connect');
socketClient = net.connect({
host: 'x.x.x.x',
port: 8080
}, () => {
// 'connect' listener
console.log('connected to server!');
clearInterval(reconnectTimer);
//maxApi.outlet('connected to server');
//socketClient.write('world!\r\n');
socketClient.write("bla1,1:bla2,1;");
});
socketClient.on('error', function (ex)
{
console.log("sensor server error");
console.log(ex);
});
// how to send data to max, test wich SocketTest 3.0v
socketClient.on('data', (data) => {
chunk += data.toString(); // Add string on the end of the variable 'chunk'
//console.log(data.toString());
d_index = chunk.indexOf(delimiter); // Find the delimiter
// While loop to keep going until no delimiter can be found
while (d_index > -1) {
try {
string = chunk.substring(0,d_index); // Create string up until the delimiter
console.log(string);
//case AIN-0,value;
//console.log(string);
process(string); // Function that does something with the current chunk of valid json.
}
catch(e)
{
console.log(e);
}
chunk = chunk.substring(d_index+1); // Cuts off the processed chunk
d_index = chunk.indexOf(delimiter); // Find the new delimiter
}
//console.log('Hello ' + person.prenom + "!");
});
});
}
function process(string) {
//console.log(obj.sensor_data.value);
// value: 0 muss weiter an max
// console.log(data.sensor_data.value);
// to max msp
string = string.substring(string.indexOf(',')+1);
var data = parseInt(string, 10);
maxApi.outlet(data);
// body...
}
socketClient.on('end', () => {
console.log('disconnected from server');
// CRASH FLAG HERE TO RESTART via "script start" to node.script object in Max?
});