...

_packages/bookstore/srv/_workarounds.cds

@@ -0,0 +1,12 @@
+//----------------------
+// workarounds -> should be done by @cds-compiler
+
+annotate cds.UUID with @odata.Type: 'Edm.String';
+
+using from '@sap/capire-products';
+annotate sap.capire.products.Products with { texts @odata.contained }
+annotate sap.capire.products.Categories with { texts @odata.contained }
+
+annotate sap.capire.reviews.ReviewsService with @imported;
+annotate sap.capire.reviews.Reviews with @cds.persistence.skip;
+annotate sap.capire.reviews.Likes with @cds.persistence.skip;

_packages/bookstore/srv/services.cds

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+namespace sap.capire.bookstore;
+
+// Service for all users to browse books
+using { sap.capire.products } from '../db/schema';
+
+service CatalogService @(path:'browse'){
+
+  @readonly entity Books as select from products.Products { *,
+    author.firstname ||' '|| author.lastname as author : String,
+    category.name as genre,
+  } excluding { createdBy, modifiedBy };
+
+  @readonly entity Genres as projection on products.Categories;
+
+}
+
+// Reuse AdminService from @sap/capire-products...
+using { sap.capire.products.AdminService } from '@sap/capire-products';
+using { sap.capire.bookstore as my } from '../db/schema';
+
+extend service AdminService with @(impl:'srv/services.js') {
+  entity Authors as projection on my.Authors;
+}
+
+// Adding reviews via @sap/capire-reviews service
+using { sap.capire.reviews.ReviewsService as external } from '@sap/capire-reviews';
+extend service CatalogService with {
+  @readonly entity Reviews as projection on external.Reviews;
+}
+
+
+// Adding images via @sap/capire-media service
+using from '@sap/capire-media';
+// using from '@sap/capire-orders';
+// using from '@sap/capire-users';

_packages/bookstore/srv/services.js

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+const cds = require('@sap/cds')
+module.exports['sap.capire.bookstore.CatalogService'] = cds.service.impl (async (srv) => {
+
+    const ReviewsService = await cds.connect.to ('sap.capire.reviews.ReviewsService')
+    const { Reviews } = ReviewsService.entities
+    const { Books } = srv.entities
+
+    // delegate requests to reviews service
+    srv.on('READ', 'Reviews', async (req) => {
+        const { SELECT } = cds.ql(req)
+        const results = await SELECT.from (Reviews)
+
+        // TODO: Should actually be using .where of fluent query API
+        if (req.query.SELECT.where) {
+            return results.filter (row => row.subject === req.query.SELECT.where[2].val)
+        }
+
+        return results
+    })
+
+    // react on event messages from reviews service
+    ReviewsService.on ('reviewed', (msg) => {
+        console.debug ('> received message:', msg.event, msg.data)
+        const {subject,rating} = msg.data
+        const tx = cds.transaction(msg)
+        return tx.run (UPDATE(Books).set({rating}) .where ({ID:subject})) //.then (console.log)
+    })
+
+})
+
+
+// FIXME: pls remove this...
+process.env.destinations = JSON.stringify([{
+    name: 'reviewsDest',
+    url: 'http://localhost:4005/reviews',
+    username: 'dummy',
+    password: 'dummy'
+}])