cache last heartbeat list in memory

server/client.js

@@ -33,13 +33,14 @@ async function sendNotificationList(socket) {
 async function sendHeartbeatList(socket, monitorID, toUser = false, overwrite = false) {
     const timeLogger = new TimeLogger();
 
-    let list = await R.find("heartbeat", `
-        monitor_id = ?
-        ORDER BY time DESC
-        LIMIT 100
-    `, [
-        monitorID,
-    ])
+    let monitor = userMonitorList.getMonitor(socket.userID, monitorID);
+
+    if (! monitor) {
+        console.error("No this monitor??");
+        return;
+    }
+
+    let list = monitor.getCachedHeartbeatList().array;
 
     let result = [];
 

server/limit-array.js

@@ -0,0 +1,13 @@
+class LimitArray {
+    limit = 100;
+    array = [];
+
+    add(item) {
+        this.array.push(item);
+        if (this.array.length > this.limit) {
+            this.array.shift();
+        }
+    }
+}
+
+module.exports = LimitArray;

server/model/monitor.js

@@ -6,14 +6,20 @@ dayjs.extend(utc)
 dayjs.extend(timezone)
 const axios = require("axios");
 const { Prometheus } = require("../prometheus");
-const { debug, UP, DOWN, PENDING, flipStatus, TimeLogger } = require("../../src/util");
+const { debug, UP, DOWN, PENDING, flipStatus, TimeLogger, getRandomInt } = require("../../src/util");
 const { tcping, ping, dnsResolve, checkCertificate, checkStatusCode, getTotalClientInRoom } = require("../util-server");
 const { R } = require("redbean-node");
 const { BeanModel } = require("redbean-node/dist/bean-model");
 const { Notification } = require("../notification")
 const { userMonitorList } = require("../user-monitor-list");
+const LimitArray = require("../limit-array");
 const version = require("../../package.json").version;
 
+/**
+ * Master List
+ */
+const cachedHeartbeatList = {};
+
 /**
  * status:
  *      0 = DOWN
@@ -21,6 +27,29 @@ const version = require("../../package.json").version;
  *      2 = PENDING
  */
 class Monitor extends BeanModel {
+
+    /**
+     * Cache Last 100 Heartbeat list
+     * @returns {LimitArray}
+     */
+    getCachedHeartbeatList() {
+        return cachedHeartbeatList[this.id];
+    }
+
+    async onOpen() {
+        this.beanMeta.extraData = {};
+
+        cachedHeartbeatList[this.id] = new LimitArray();
+
+        cachedHeartbeatList[this.id].array = await R.find("heartbeat", `
+            monitor_id = ?
+            ORDER BY time DESC
+            LIMIT 100
+        `, [
+            this.id,
+        ]);
+    }
+
     async toJSON() {
 
         let notificationIDList = {};
@@ -83,7 +112,6 @@ class Monitor extends BeanModel {
         let prometheus = new Prometheus(this);
 
         const beat = async () => {
-
             // Expose here for prometheus update
             // undefined if not https
             let tlsInfo = undefined;
@@ -302,22 +330,37 @@ class Monitor extends BeanModel {
                 console.warn(`Monitor #${this.id} '${this.name}': Failing: ${bean.msg} | Type: ${this.type}`)
             }
 
+            if (! this.beanMeta.extraData.uniqueNumber) {
+                this.beanMeta.extraData.uniqueNumber = getRandomInt(0, 9999999999);
+            }
+
+            debug(this.beanMeta.extraData.uniqueNumber);
+
             io.to(this.user_id).emit("heartbeat", bean.toJSON());
             Monitor.sendStats(io, this.id, this.user_id)
 
             await R.store(bean);
+
+            // Also add to cache
+            this.getCachedHeartbeatList().add(bean);
+
             prometheus.update(bean, tlsInfo);
 
             previousBeat = bean;
 
-            this.heartbeatInterval = setTimeout(beat, this.interval * 1000);
+            if (this.beanMeta.extraData.stop !== true) {
+                this.heartbeatInterval = setTimeout(beat, this.interval * 1000);
+            }
         }
 
         beat();
     }
 
     stop() {
+        console.log(`[Monitor: ${this.id}] Stop`);
+        debug("Stop " + this.beanMeta.extraData.uniqueNumber)
         clearTimeout(this.heartbeatInterval);
+        this.beanMeta.extraData.stop = true;
     }
 
     /**

server/server.js

@@ -283,8 +283,7 @@ let indexHTML = fs.readFileSync("./dist/index.html").toString();
 
                 bean.import(monitor)
                 bean.user_id = socket.userID
-                await R.store(bean)
-
+                await R.store(bean);
                 await updateMonitorNotification(bean.id, notificationIDList)
 
                 await startMonitor(socket.userID, bean.id);
@@ -427,7 +426,6 @@ let indexHTML = fs.readFileSync("./dist/index.html").toString();
                 let monitor = userMonitorList.getMonitor(socket.userID, monitorID);
 
                 if (monitor) {
-                    monitor.stop();
                     userMonitorList.delete(socket.userID, monitorID);
                 }
 
@@ -678,7 +676,7 @@ let indexHTML = fs.readFileSync("./dist/index.html").toString();
     });
 
     console.log("Starting All Monitors");
-    await startMonitors();
+    await initMonitors();
 
     console.log("Init the server");
 
@@ -818,24 +816,18 @@ async function startMonitor(userID, monitorID) {
 
     let monitor = await R.findOne("monitor", " id = ? ", [
         monitorID,
-    ])
-
-    let oldMonitor = userMonitorList.getMonitor(userID, monitorID);
-
-    if (oldMonitor) {
-        oldMonitor.stop();
-    }
+    ]);
 
     userMonitorList.add(userID, monitor);
     monitor.start(io)
 }
 
 async function restartMonitor(userID, monitorID) {
-    return await startMonitor(userID, monitorID)
+    return await startMonitor(userID, monitorID);
 }
 
 async function pauseMonitor(userID, monitorID) {
-    await checkOwner(userID, monitorID)
+    await checkOwner(userID, monitorID);
 
     console.log(`Pause Monitor: ${monitorID} User ID: ${userID}`)
 
@@ -847,6 +839,7 @@ async function pauseMonitor(userID, monitorID) {
     let monitor = userMonitorList.getMonitor(userID, monitorID);
 
     if (monitor) {
+        monitor.active = 0;
         monitor.stop();
     }
 }
@@ -854,14 +847,21 @@ async function pauseMonitor(userID, monitorID) {
 /**
  * Resume active monitors
  */
-async function startMonitors() {
-    let list = await R.find("monitor", " active = 1 ");
+async function initMonitors() {
+    // Init all monitors
+    let list = await R.find("monitor");
+    let activeList = [];
 
     for (let monitor of list) {
         userMonitorList.add(monitor.user_id, monitor);
+
+        if (monitor.active) {
+            activeList.push(monitor);
+        }
     }
 
-    delayStartMonitors(list);
+    // Start active monitors only
+    delayStartMonitors(activeList);
 }
 
 /**

server/user-monitor-list.js

@@ -4,14 +4,36 @@
 class UserMonitorList {
     list = {};
 
+    /**
+     * Add or update
+     * @param userID
+     * @param monitor
+     */
     add(userID, monitor) {
         if (! this.list[userID]) {
             this.list[userID] = {};
         }
+
+        // Stopped the old monitor if same id
+        this.stop(userID, monitor.id);
+
         this.list[userID][monitor.id] = monitor;
     }
 
+    stop(userID, monitorID) {
+        if (this.list[userID][monitorID]) {
+            let oldMonitor = this.list[userID][monitorID];
+
+            if (oldMonitor) {
+                oldMonitor.stop();
+            } else {
+                console.log("No old monitor: " + monitorID);
+            }
+        }
+    }
+
     delete(userID, monitorID) {
+        this.stop(userID, monitorID);
         let monitorList = this.getMonitorList(userID);
         delete monitorList[monitorID];
     }