final state of exercise 3

packages/bookstore/srv/services.cds

@@ -14,4 +14,11 @@ service CatalogService {
 using { sap.capire.products.AdminService } from '@sap/capire-products';
 extend service AdminService with {
   entity Authors as projection on my.Authors;
+}
+
+// Adding reviews via capire-reviews service
+using { sap.capire.reviews.ReviewsService as external} from 'reviews-service';
+
+extend service CatalogService {
+  @readonly entity Reviews @(cds.persistence.skip) as projection on external.Reviews;
 }

packages/bookstore/srv/services.js

@@ -15,4 +15,21 @@ module.exports = async (srv) => {
       }
     })))
   })
+
+  const reviews_srv = await cds.connect.to('sap.capire.reviews.ReviewsService')
+
+  // react on event messages from reviews service
+  reviews_srv.on('reviewed', (msg) => {
+      console.debug('> received', msg)
+  })
+
+  // delegate requests to reviews service
+  srv.on('READ', 'Reviews', async (req) => {
+    const { Reviews } = reviews_srv.entities
+
+    const tx = reviews_srv.transaction(req)
+    const results = await tx.read(Reviews)
+
+    return results
+  })
 }