fix: handle upgrade properly in signal router

Signed-off-by: Heikki Hellgren <heikki.hellgren@op.fi>

plugins/devtools-backend/api-report.md

@@ -25,6 +25,8 @@ export class DevToolsBackendApi {
   listExternalDependencyDetails(): Promise<ExternalDependency[]>;
   // (undocumented)
   listInfo(): Promise<DevToolsInfo>;
+  // (undocumented)
+  listResourceUtilization(): Promise<string>;
 }
 
 // @public

plugins/devtools-backend/src/api/DevToolsBackendApi.ts

@@ -203,17 +203,21 @@ export class DevToolsBackendApi {
     return configInfo;
   }
 
-  public async listInfo(): Promise<DevToolsInfo> {
-    const operatingSystem = `${os.hostname()}: ${os.type} ${os.release} - ${
-      os.platform
-    }/${os.arch}`;
+  public async listResourceUtilization(): Promise<string> {
     const usedMem = Math.floor((os.totalmem() - os.freemem()) / (1024 * 1024));
-    const resources = `Memory: ${usedMem}/${Math.floor(
+    return `Memory: ${usedMem}/${Math.floor(
       os.totalmem() / (1024 * 1024),
     )}MB - Load: ${os
       .loadavg()
       .map(v => v.toFixed(2))
       .join('/')}`;
+  }
+
+  public async listInfo(): Promise<DevToolsInfo> {
+    const operatingSystem = `${os.hostname()}: ${os.type} ${os.release} - ${
+      os.platform
+    }/${os.arch}`;
+
     const nodeJsVersion = process.version;
 
     /* eslint-disable-next-line no-restricted-syntax */
@@ -247,7 +251,7 @@ export class DevToolsBackendApi {
 
     const info: DevToolsInfo = {
       operatingSystem: operatingSystem ?? 'N/A',
-      resourceUtilization: resources ?? 'N/A',
+      resourceUtilization: (await this.listResourceUtilization()) ?? 'N/A',
       nodeJsVersion: nodeJsVersion ?? 'N/A',
       backstageVersion:
         backstageJson && backstageJson.version ? backstageJson.version : 'N/A',

plugins/devtools-backend/src/service/router.ts

@@ -56,9 +56,11 @@ export async function createRouter(
   if (signalService) {
     // Publish info periodically using the signal service
     setInterval(async () => {
-      if (signalService.hasSubscribers('devtools:info')) {
-        const info = await devToolsBackendApi.listInfo();
-        await signalService.publish('*', 'devtools:info', info);
+      if (signalService.hasSubscribers('devtools:resources')) {
+        const info = await devToolsBackendApi.listResourceUtilization();
+        await signalService.publish('*', 'devtools:resources', {
+          resources: info,
+        });
       }
     }, 5000);
   }