Du skal oprette en pool og bruge getConnection på den pool. Derefter, når du er færdig med forbindelsen, skal du slippe den. Derudover behøver du ikke at stoppe pollingLoop eller starte den for hver forbindelse, en loop er nok.
Jeg forstod ikke if-sætningen med betingelser, så jeg udelod den. Det skal sandsynligvis gå et andet sted hen.
var socketArr = [];
function handler(req, res) {
res.statusCode = 200;
res.connection.setTimeout(0);
res.end();
}
app.listen(port, ip);
var pool = mysql.createPool({
host : 'example.org',
user : 'bob',
password : 'secret'
});
function pollingLoop () {
if (socketArr.length === 0) {
// no connections, wait and try again
setTimeout(pollingLoop, 1000);
return; // continue without sending mysql query
}
pool.getConnection(function (err, connection) {
if (err) {
console.log({
"code": 100,
"status": "Error in connection database"
});
return;
}
console.log('connected as id ' + connection.threadId);
var selection = "SELECT * FROM auctions";
var streamArray = [],
lg = '';
var query = connection.query(selection, function (err, results, fields, rows) {
lg += ('id: ' + results[0].id + ' (' + results[0].duration + ') ');
/*if (conditions) {
var query_update = connection.query('UPDATE `auctions` SET `price` = ? WHERE `id` = ?', [price, auction.id]);
console.log(time() + 'UPDATED id ' + auction.id + ': price (' + price + '€)');
}*/
streamArray.push(results);
updateSockets({
streamArray: streamArray
});
console.log("auctions pushed: " + streamArray);
connection.release();
setTimeout(pollingLoop, 1000);
});
console.log(time() + lg + ' C: ' + socketArr.length);
});
}
// start loop
pollingLoop();
io.sockets.on('connection', function (socket) {
socket.on('disconnect', function () {
var socketIndex = socketArr.indexOf(socket);
console.log(time() + 'SOCKET-ID = %s DISCONNECTED', socketIndex);
if (~socketIndex) {
socketArr.splice(socketIndex, 1);
}
});
console.log(time() + 'NEW SOCKET CONNECTED!');
socketArr.push(socket);
});
var updateSockets = function (data) {
socketArr.forEach(function (tmpSocket) {
tmpSocket.volatile.emit('stream', data);
});
};