core: 优化钩子逻辑

packages/hydrooj/src/service/monitor.ts

@@ -1,5 +1,6 @@
 import cluster from 'cluster';
 import * as db from './db';
+import * as bus from './bus';
 import * as sysinfo from '../lib/sysinfo';
 
 const coll = db.collection('status');
@@ -24,17 +25,15 @@ export function updateJudger(args) {
 }
 
 if (cluster.isMaster) {
-    global.Hydro.postInit.push(
-        async () => {
-            const info = await sysinfo.get();
-            await coll.updateOne(
-                { mid: info.mid, type: 'server' },
-                { $set: { ...info, updateAt: new Date(), type: 'server' } },
-                { upsert: true },
-            );
-            setInterval(update, 60 * 1000);
-        },
-    );
+    bus.on('app/started', async () => {
+        const info = await sysinfo.get();
+        await coll.updateOne(
+            { mid: info.mid, type: 'server' },
+            { $set: { ...info, updateAt: new Date(), type: 'server' } },
+            { upsert: true },
+        );
+        setInterval(update, 60 * 1000);
+    });
 }
 
 global.Hydro.service.monitor = { update, updateJudger };