Adding a Pusher container as a middleware/dispatcher between front and back

pusher/src/Services/CpuTracker.ts

@@ -0,0 +1,55 @@
+import {CPU_OVERHEAT_THRESHOLD} from "../Enum/EnvironmentVariable";
+
+function secNSec2ms(secNSec: Array<number>|number) {
+    if (Array.isArray(secNSec)) {
+        return secNSec[0] * 1000 + secNSec[1] / 1000000;
+    }
+    return secNSec / 1000;
+}
+
+class CpuTracker {
+    private cpuPercent: number = 0;
+    private overHeating: boolean = false;
+
+    constructor() {
+        let time  = process.hrtime.bigint()
+        let usage = process.cpuUsage()
+        setInterval(() => {
+            const elapTime = process.hrtime.bigint();
+            const elapUsage = process.cpuUsage(usage)
+            usage = process.cpuUsage()
+
+            const elapTimeMS = elapTime - time;
+            const elapUserMS = secNSec2ms(elapUsage.user)
+            const elapSystMS = secNSec2ms(elapUsage.system)
+            this.cpuPercent = Math.round(100 * (elapUserMS + elapSystMS) / Number(elapTimeMS) * 1000000)
+
+            time = elapTime;
+
+            if (!this.overHeating && this.cpuPercent > CPU_OVERHEAT_THRESHOLD) {
+                this.overHeating = true;
+                console.warn('CPU high threshold alert. Going in "overheat" mode');
+            } else if (this.overHeating && this.cpuPercent <= CPU_OVERHEAT_THRESHOLD) {
+                this.overHeating = false;
+                console.log('CPU is back to normal. Canceling "overheat" mode');
+            }
+
+            /*console.log('elapsed time ms:  ', elapTimeMS)
+            console.log('elapsed user ms:  ', elapUserMS)
+            console.log('elapsed system ms:', elapSystMS)
+            console.log('cpu percent:      ', this.cpuPercent)*/
+        }, 100);
+    }
+
+    public getCpuPercent(): number {
+        return this.cpuPercent;
+    }
+
+    public isOverHeating(): boolean {
+        return this.overHeating;
+    }
+}
+
+const cpuTracker = new CpuTracker();
+
+export { cpuTracker };