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paco_sako_server
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use monotonic time for updates

This commit is contained in:
Jesse D. McDonald 2020-04-28 14:37:36 -05:00
parent 931eb6a134
commit e8a3c764e0
1 changed files with 20 additions and 1 deletions
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21
index.js
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@ -6,6 +6,15 @@ var express = require('express');
const POLLING_TIMEOUT = 60000/*ms*/;
let nextMonotonicTime = 1;
function monotonicTime() {
const now = +new Date();
const mono = (now >= nextMonotonicTime) ? now : nextMonotonicTime;
nextMonotonicTime = mono + 1;
return mono;
}
var appendJournal = (function() {
let lastJournalText = null;
return function appendJournal(text) {
@ -53,6 +62,15 @@ const dbInit = (async function dbInit() {
CREATE INDEX IF NOT EXISTS games_modified ON games(modified)
`);
const maxModified = await db.getAsync(`
SELECT MAX(modified) as result FROM games
`).catch(logDbError('maxModified'));
/* Just in case the system clock moved backward since the last record was written. */
if (maxModified && maxModified.result) {
nextMonotonicTime = maxModified.result + 1;
}
console.log('Connected to the SQLite database.');
return db;
@ -286,7 +304,6 @@ function validateUpdate(body) {
async function postGameHandler(req, res, next) {
res.set('Cache-Control', 'no-store');
const time = +new Date();
const gameId = req.params.gameId;
const body = validateUpdate(req.body);
@ -300,6 +317,8 @@ async function postGameHandler(req, res, next) {
return;
}
const time = monotonicTime();
const params = {
$gameId: gameId,
$lightName: '',