Map caching, clickhouse test service

monitor/index.ts

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+import { serve } from 'bun';
+import { Database } from 'bun:sqlite';
+
+const db = new Database('./data/servers.db');
+
+// Initialize the database table if it doesn't exist
+db.run(`
+    CREATE TABLE IF NOT EXISTS servers (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        name TEXT NOT NULL,
+        ip TEXT NOT NULL,
+        ping_rate INTEGER NOT NULL
+    )
+`);
+
+// Function to check server availability
+async function checkServer(server: { name: string; ip: string; ping_rate: number; }) {
+    try {
+        const response = await Bun.spawn(['ping', '-c', '1', server.ip]);
+        if (response.exitCode === 0) {
+            console.log(`[${new Date().toISOString()}] ${server.name} (${server.ip}) is up.`);
+        } else {
+            console.error(`[${new Date().toISOString()}] ${server.name} (${server.ip}) is down!`);
+        }
+    } catch (error) {
+        console.error(`[${new Date().toISOString()}] Error pinging ${server.name} (${server.ip}):`, error);
+    }
+}
+
+// Function to monitor servers based on their individual ping rates
+async function monitorServer(server: any) {
+    while (true) {
+        await checkServer(server);
+        await new Promise(resolve => setTimeout(resolve, server.ping_rate));
+    }
+}
+
+// Start monitoring all servers
+async function startMonitoring() {
+    const servers = db.query(`SELECT * FROM servers`).all();
+    servers.forEach(server => monitorServer(server));
+}
+
+// Start monitoring in the background
+startMonitoring();
+
+// API Server to manage servers
+const server = serve({
+    port: process.env.MONITOR_PORT || 1234,
+    fetch: async (req) => {
+        const url = new URL(req.url);
+        const pathname = url.pathname;
+        const method = req.method;
+
+        if (pathname === '/servers' && method === 'GET') {
+            const servers = db.query(`SELECT * FROM servers`).all();
+            return new Response(JSON.stringify(servers), {
+                headers: { 'Content-Type': 'application/json' },
+            });
+        }
+
+        if (pathname === '/server' && method === 'POST') {
+            const data = await req.json();
+            const { name, ip, ping_rate } = data;
+
+            if (!name || !ip || !ping_rate) {
+                return new Response('Missing fields', { status: 400 });
+            }
+
+            db.run(
+                `INSERT INTO servers (name, ip, ping_rate) VALUES (?, ?, ?)`,
+                name, ip, ping_rate
+            );
+            return new Response('Server added', { status: 201 });
+        }
+
+        if (pathname.startsWith('/server/') && method === 'PUT') {
+            const id = pathname.split('/').pop();
+            const data = await req.json();
+            const { name, ip, ping_rate } = data;
+
+            if (!id || !name || !ip || !ping_rate) {
+                return new Response('Missing fields', { status: 400 });
+            }
+
+            db.run(
+                `UPDATE servers SET name = ?, ip = ?, ping_rate = ? WHERE id = ?`,
+                name, ip, ping_rate, id
+            );
+            return new Response('Server updated', { status: 200 });
+        }
+
+        return new Response('Not Found', { status: 404 });
+    },
+});
+
+console.log(`API server and monitoring running on http://localhost:${server.port}`);