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uptime calculation fully sum in sql

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LouisLam 2021-09-09 15:46:28 +08:00
parent 0b1d0d22ff
commit 4f07c2ea9a
1 changed files with 35 additions and 44 deletions
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75
server/model/monitor.js
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@ -409,60 +409,51 @@ class Monitor extends BeanModel {
static async sendUptime(duration, io, monitorID, userID) {
const timeLogger = new TimeLogger();
let sec = duration * 3600;
const startTime = R.isoDateTime(dayjs.utc().subtract(duration, "hour"));
let heartbeatList = await R.getAll(`
SELECT duration, time, status
// Handle if heartbeat duration longer than the target duration
// e.g. If the last beat's duration is bigger that the 24hrs window, it will use the duration between the (beat time - window margin) (THEN case in SQL)
let result = await R.getRow(`
SELECT
-- SUM all duration, also trim off the beat out of time window
SUM(
CASE
WHEN (JULIANDAY(\`time\`) - JULIANDAY(?)) * 86400 < duration
THEN (JULIANDAY(\`time\`) - JULIANDAY(?)) * 86400
ELSE duration
END
) AS total_duration,
-- SUM all uptime duration, also trim off the beat out of time window
SUM(
CASE
WHEN (status = 1)
THEN
CASE
WHEN (JULIANDAY(\`time\`) - JULIANDAY(?)) * 86400 < duration
THEN (JULIANDAY(\`time\`) - JULIANDAY(?)) * 86400
ELSE duration
END
END
) AS uptime_duration
FROM heartbeat
WHERE time > DATETIME('now', ? || ' hours')
AND monitor_id = ? `, [
-duration,
WHERE time > ?
AND monitor_id = ?
`, [
startTime, startTime, startTime, startTime, startTime,
monitorID,
]);
timeLogger.print(`[Monitor: ${monitorID}][${duration}] sendUptime`);
let downtime = 0;
let total = 0;
let uptime;
let totalDuration = result.total_duration;
let uptimeDuration = result.uptime_duration;
// Special handle for the first heartbeat only
if (heartbeatList.length === 1) {
if (heartbeatList[0].status === 1) {
uptime = 1;
} else {
uptime = 0;
}
} else {
for (let row of heartbeatList) {
let value = parseInt(row.duration)
let time = row.time
// Handle if heartbeat duration longer than the target duration
// e.g. Heartbeat duration = 28hrs, but target duration = 24hrs
if (value > sec) {
let trim = dayjs.utc().diff(dayjs(time), "second");
value = sec - trim;
if (value < 0) {
value = 0;
}
}
total += value;
if (row.status === 0 || row.status === 2) {
downtime += value;
}
}
uptime = (total - downtime) / total;
let uptime = uptimeDuration / totalDuration;
if (uptime < 0) {
uptime = 0;
}
}
io.to(userID).emit("uptime", monitorID, duration, uptime);
}