make sure that etags don't expire spuriously

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

.changeset/weak-bottles-cross.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog-backend': patch
+---
+
+Fix a bug where etags were expiring too soon in the URL reader

plugins/catalog-backend/src/processors/UrlReaderProcessor.test.ts

@@ -149,7 +149,7 @@ describe('UrlReaderProcessor', () => {
 
     expect(mockCache.get).toHaveBeenCalledWith('v1');
     expect(mockCache.get).toHaveBeenCalledTimes(1);
-    expect(mockCache.set).toHaveBeenCalledTimes(0);
+    expect(mockCache.set).toHaveBeenCalledTimes(1);
   });
 
   it('should fail load from url with error', async () => {

plugins/catalog-backend/src/processors/UrlReaderProcessor.ts

@@ -111,6 +111,7 @@ export class UrlReaderProcessor implements CatalogProcessor {
           emit(parseResult);
         }
         emit(processingResult.refresh(`${location.type}:${location.target}`));
+        await cache.set(CACHE_KEY, cacheItem);
       } else if (error.name === 'NotFoundError') {
         if (!optional) {
           emit(processingResult.notFoundError(location, message));