feat(catalog-backend): Add configuration parameters for deferred stitcher

Allows for settings the stitch timeout and polling interval.

Signed-off-by: Łukasz Jernaś <lukasz.jernas@allegro.com>

.changeset/quiet-islands-learn.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog-backend': patch
+---
+
+Add configuration parameters for deferred stitcher

plugins/catalog-backend/config.d.ts

@@ -156,6 +156,10 @@ export interface Config {
       | {
           /** Defer stitching to be performed asynchronously */
           mode: 'deferred';
+          /** Polling interval for tasks in seconds */
+          pollingInterval?: number;
+          /** How long to wait for a stitch to complete before giving up in seconds */
+          stitchTimeout?: number;
         };
 
     /**

plugins/catalog-backend/src/stitching/types.ts

@@ -66,11 +66,15 @@ export function stitchingStrategyFromConfig(config: Config): StitchingStrategy {
       mode: 'immediate',
     };
   } else if (strategyMode === 'deferred') {
-    // TODO(freben): Make parameters configurable
+    const pollingInterval =
+      config.getOptionalNumber('catalog.stitchingStrategy.pollingInterval') ??
+      1;
+    const stitchTimeout =
+      config.getOptionalNumber('catalog.stitchingStrategy.stitchTimeout') ?? 60;
     return {
       mode: 'deferred',
-      pollingInterval: { seconds: 1 },
-      stitchTimeout: { seconds: 60 },
+      pollingInterval: { seconds: pollingInterval },
+      stitchTimeout: { seconds: stitchTimeout },
     };
   }