.

* Copyied from fiori/app/admin
* Added Supplier + Value Help + Texts
* Fixed bug in replication handler that caused to return wrong data

README.md

@@ -84,3 +84,35 @@ In case you've a question, find a bug, or otherwise need support, use our [commu
 ## License
 
 Copyright (c) 2021 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, version 2.0 except as noted otherwise in the [LICENSE](LICENSE.txt) file.
+
+# Suppliers - in progress for Messaging & Service Consumption -
+
+## TODOs
+
+1. Fix issues when running in same process
+2. Automated tests
+
+## Usage
+
+1. Run:
+
+   ```
+   CDS_ENV=local-hybrid cds mock API_BUSINESS_PARTNER -p 5001
+   ```
+
+2. Wait until startup is completed
+3. Run in a 2nd terminal:
+
+   ```
+   CDS_ENV=local-hybrid cds serve all --with-mocks --in-memory
+   ```
+
+4. Now, you can issues the requests listed in `suppliers/requests.http`
+
+## Request Sequence
+
+* TODO
+## URLs
+
+* Get books with their replicated supplier: http://localhost:4004/browse/Books?$expand=supplier
+* Get remote suppliers: http://localhost:4004/admin/Suppliers?$top=11

bookshop/srv/cat-service.cds

@@ -2,8 +2,9 @@ using { sap.capire.bookshop as my } from '../db/schema';
 service CatalogService @(path:'/browse') {
 
   /** For displaying lists of Books */
-  @readonly entity ListOfBooks as projection on Books
+  @readonly entity ListOfBooks as projection on Books {
-  excluding { descr };
+    ID, title, author, genre, price, currency
+  }
 
   /** For display in details pages */
   @readonly entity Books as projection on my.Books { *,

fiori/.env

@@ -1,2 +1,2 @@
-# cds.requires.messaging.kind = file-based-messaging
+cds.requires.messaging.kind = file-based-messaging
 PORT = 4004

fiori/app/bookshop.html

@@ -1,3 +0,0 @@
-<head>
-  <meta http-equiv="refresh" content="0;url=bookshop/index.html">
-</head>

fiori/app/reviews.html

@@ -1,3 +0,0 @@
-<head>
-  <meta http-equiv="refresh" content="0;url=reviews/index.html">
-</head>

fiori/package.json

@@ -3,10 +3,11 @@
   "version": "1.0.0",
   "dependencies": {
     "@capire/bookshop": "*",
-    "@capire/reviews": "*",
-    "@capire/orders": "*",
     "@capire/common": "*",
-    "@sap/cds": "^5",
+    "@capire/orders": "*",
+    "@capire/reviews": "*",
+    "@capire/suppliers": "*",
+    "@sap/cds": ">=5",
     "express": "^4.17.1",
     "passport": "^0.4.1"
   },
@@ -19,15 +20,19 @@
       "deploy-format": "hdbtable"
     },
     "requires": {
+      "API_BUSINESS_PARTNER": {
+        "kind": "odata-v2",
+        "model": "@capire/suppliers"
+      },
       "auth": {
         "strategy": "dummy"
       },
       "ReviewsService": {
-        "kind": "odata",
+        "kind": "odata-v4",
         "model": "@capire/reviews"
       },
       "OrdersService": {
-        "kind": "odata",
+        "kind": "odata-v4",
         "model": "@capire/orders"
       },
       "db": {

fiori/server.js

@@ -2,22 +2,15 @@ const cds = require ('@sap/cds')
 module.exports = cds.server
 
 cds.once('bootstrap',(app)=>{
-  app.use ('/orders/webapp', _from('@capire/orders/app/orders/webapp/manifest.json'))
+  app.serve ('/orders/webapp').from('@capire/orders','app/orders/webapp')
-  app.use ('/bookshop', _from('@capire/bookshop/app/vue/index.html'))
+  app.serve ('/bookshop').from('@capire/bookshop','app/vue')
-  app.use ('/reviews', _from('@capire/reviews/app/vue/index.html'))
+  app.serve ('/reviews').from('@capire/reviews','app/vue')
 })
 
 cds.once('served', require('./srv/mashup'))
+cds.once('served', require('@capire/suppliers/srv/mashup'))
 
 // Swagger UI - see https://cap.cloud.sap/docs/advanced/openapi
 if (process.env.NODE_ENV !== 'production') {
-  const cds_swagger = require ('cds-swagger-ui-express')
+  cds.once ('bootstrap', app => app.use (require ('cds-swagger-ui-express')()) )
-  cds.once ('bootstrap', app => app.use (cds_swagger()) )
 }
-
-
-// -----------------------------------------------------------------------
-// Helper for serving static content from npm-installed packages
-const {static} = require('express')
-const {dirname} = require('path')
-const _from = target => static (dirname (require.resolve(target)))

fiori/srv/mashup.cds

@@ -3,17 +3,17 @@
 //    Mashing up imported models...
 //
 
-using { sap.capire.bookshop.Books } from '@capire/bookshop';
-
 //
 //  Extend Books with access to Reviews and average ratings
 //
 
+using { CatalogService.ListOfBooks, sap.capire.bookshop.Books } from '@capire/bookshop';
 using { ReviewsService.Reviews } from '@capire/reviews';
 extend Books with {
   reviews : Composition of many Reviews on reviews.subject = $self.ID;
-  rating  : Decimal;
+  rating  : Reviews:rating;
 }
+extend projection ListOfBooks with { rating }
 
 //
 //  Extend Orders with Books as Products
@@ -23,3 +23,9 @@ using { sap.capire.orders.Orders_Items } from '@capire/orders';
 extend Orders_Items with {
   book : Association to Books on product.ID = book.ID
 }
+
+
+using { OrdersService.Orders } from '@capire/orders';
+// extend service CatalogService with {
+//   entity OrdereredBooks as projection on Orders;
+// }

orders/api/external.cds

@@ -0,0 +1,9 @@
+context external {
+
+  /** This is a stand-in for arbitrary ordered Products */
+  entity Products @(cds.persistence.skip:'always') {
+    key ID : String;
+    data : String;
+  }
+
+}

orders/api/orders-service-comp.cds

@@ -0,0 +1,21 @@
+using { cuid, managed, User, Currency } from '@sap/cds/common';
+using { sap.capire.orders as my } from '../db/schema';
+using { external.Products } from './external';
+
+
+service OrdersService {
+
+  entity Orders : cuid, managed {
+    OrderNo  : String @title:'Order Number'; //> readable key
+    Items    : Composition of many {
+      key ID    : UUID;
+      product   : Association to Products;
+      amount    : Integer;
+      title     : String; //> intentionally replicated as snapshot from product.title
+      price     : Double;
+    };
+    buyer    : User;
+    currency : Currency;
+  }
+
+}

orders/api/orders-service.cds

@@ -0,0 +1,40 @@
+using { cuid, managed, User, Currency } from '@sap/cds/common';
+using { sap.capire.orders as my } from '../db/schema';
+using { external.Products } from './external';
+
+
+// GET Orders
+// GET Orders()/Items
+// GET Orders?$Items
+
+service OwnService {
+  entity Orders as projection on OrdersService.Orders;
+  entity Products as projection on OrdersService.Products;
+}
+
+service OrdersService {
+
+  entity Orders : cuid, managed {
+    OrderNo  : String @title:'Order Number'; //> readable key
+    Items    : Composition of many Orders_Items; // on Items.up_ = $self;
+    // MoreItems    : Composition of many Orders_Items; // on Items.up_ = $self;
+     // Items_ID
+    buyer    : User;
+    currency : Currency;
+  }
+
+  entity Orders_Items {
+    key ID    : UUID;
+    // up_       : Association to Orders;
+    product   : Association to Products; //> {ID}
+    // product_ID
+    amount    : Integer;
+    title     : String; //> intentionally replicated as snapshot from product.title
+    price     : Double;
+  }
+
+  // entity Products {
+  //   key ID : UUID;
+  // }
+
+}

package.json

@@ -12,6 +12,7 @@
     "@capire/media": "./media",
     "@capire/orders": "./orders",
     "@capire/reviews": "./reviews",
+    "@capire/suppliers": "./suppliers",
     "@sap/cds": "^5",
     "express": "^4"
   },

reviews/srv/reviews-service.cds

@@ -8,9 +8,9 @@ service ReviewsService {
   action unlike (review: type of Reviews:ID);
 
   // Async API
-   event reviewed : {
+   event reviewed : projection on Reviews {
-     subject: type of Reviews:subject;
+     subject, //> recieved new reviews
-     rating: Decimal(2,1)
+     rating  //> new avg rating
    }
 
   // Input validation

reviews/test/bookshop/.env

@@ -0,0 +1,2 @@
+cds.requires.messaging.kind = file-based-messaging
+PORT = 4004

reviews/test/bookshop/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "@capire/fiori",
+  "version": "1.0.0",
+  "dependencies": {
+    "@capire/bookshop": "*",
+    "@capire/reviews": "*",
+    "@sap/cds": "^5",
+    "express": "^4.17.1"
+  },
+  "cds": {
+    "requires": {
+      "auth": { "strategy": "dummy" },
+      "ReviewsService": {
+        "kind": "odata",
+        "model": "@capire/reviews"
+      }
+    }
+  }
+}

reviews/test/bookshop/server.js

@@ -0,0 +1,20 @@
+const cds = require ('@sap/cds')
+
+cds.once('bootstrap',(app)=>{
+  // Delegate to imported apps (reviews only when mocked)
+  app.serve ('/bookshop').from ('@capire/bookshop','app/vue')
+  app.serve ('/reviews',).from ('@capire/reviews','app/vue')
+})
+
+cds.once('served', async ()=>{
+  // Update Books' average ratings when ReviewsService signals updated reviews
+  const ReviewsService = await cds.connect.to ('ReviewsService')
+  ReviewsService.on ('reviewed', (msg) => {
+    console.debug ('> received:', msg.event, msg.data)
+    const { subject, rating } = msg.data
+    return UPDATE('Books',subject).with({rating})
+  })
+
+})
+
+module.exports = cds.server

reviews/test/bookshop/services.cds

@@ -0,0 +1,11 @@
+namespace sap.capire.bookshop; //> allows UPDATE('Books')...
+//
+//  Extend Books with access to Reviews and average ratings
+//
+using { CatalogService.ListOfBooks, sap.capire.bookshop.Books } from '@capire/bookshop';
+using { ReviewsService.Reviews } from '@capire/reviews';
+extend Books with {
+  reviews : Composition of many Reviews on reviews.subject = $self.ID;
+  rating  : Reviews:rating;
+}
+extend projection ListOfBooks with { rating }

samples.md

@@ -50,14 +50,22 @@ Each sub directory essentially is an individual npm package arranged in an [all-
 - Late-cut Micro Services
 - As well as managed data, input validations, and authorization
 
+## [@capire/suppliers](suppliers)
+
+- Shows how to integrate remote services, in this case the BusinessPartner service from SAP S/4HANA.
+- Extending [@capire/bookshop](bookshop) with suppliers from SAP S/4HANA
+- Providing that as a pre-built integration & extension package
+- Used in [@capire/fiori](fiori)
+
 
 ## [@capire/fiori](fiori)
 
 - A [composite app, reusing and combining](https://cap.cloud.sap/docs/guides/verticalize) these packages:
   - [@capire/bookshop](bookshop)
-  - [@capire/reviews](reviews)
-  - [@capire/orders](orders)
   - [@capire/common](common)
+  - [@capire/orders](orders)
+  - [@capire/reviews](reviews)
+  - [@capire/suppliers](suppliers)
 - [Adds an SAP Fiori elements application](https://cap.cloud.sap/docs/guides/fiori/) to bookshop, thereby introducing to:
   - [OData Annotations](https://cap.cloud.sap/docs/guides/fiori#adding-odata-annotations) in `.cds` files
   - Support for [Fiori Draft](https://cap.cloud.sap/docs/guides/fiori#draft)

suppliers/.env

@@ -0,0 +1 @@
+PORT = 4006

suppliers/app/_i18n/i18n.properties

@@ -0,0 +1,31 @@
+Books = Books
+Book = Book
+ID = ID
+Title = Title
+Author = Author
+AuthorID = Author ID
+Stock = Stock
+Name = Name
+AuthorName = Author's Name
+DateOfBirth = Date of Birth
+DateOfDeath = Date of Death
+PlaceOfBirth = Place of Birth
+PlaceOfDeath = Place of Death
+Age = Age
+Authors = Authors
+Order = Order
+Orders = Orders
+Price = Price
+
+Genre = Genre
+Genres = Genres
+SubGenres = Sub Genres
+
+NumCode = Numeric Code
+MinorUnit = Minor Unit
+Exponent = Exponent
+
+Supplier = Supplier
+SupplierName = Supplier Name
+Id = Id
+Name = Name

suppliers/app/_i18n/i18n_de.properties

@@ -0,0 +1,18 @@
+Books = Bücher
+Book = Buch
+ID = ID
+Title = Titel
+Authors = Autoren
+Author = Autor
+AuthorID = ID des Autors
+AuthorName = Name des Autors
+Age = Alter
+Name = Name
+Stock = Bestand
+Order = Bestellung
+Orders = Bestellungen
+Price = Preis
+Supplier = Lieferant
+SupplierName = Lieferantenname
+Id = Id
+Name = Name

suppliers/app/admin-fiori.html

@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<html>
+<head>
+
+	<meta http-equiv="X-UA-Compatible" content="IE=edge" />
+	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
+	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
+	<title>Bookshop</title>
+
+	<script>
+		window["sap-ushell-config"] = {
+			defaultRenderer: "fiori2",
+			applications: {
+				"browse-books": {
+					title: "Browse Books",
+					description: "w/ SAP Fiori Elements",
+					additionalInformation: "SAPUI5.Component=bookshop",
+					applicationType : "URL",
+					url: "/browse/webapp",
+					navigationMode: "embedded"
+				},
+				"manage-books": {
+					title: "Manage Books",
+					description: "w/ SAP Fiori Elements",
+					additionalInformation: "SAPUI5.Component=admin",
+					applicationType : "URL",
+					url: "/admin/webapp",
+					navigationMode: "embedded"
+				},
+				"manage-orders": {
+					title: "Manage Orders",
+					description: "w/ SAP Fiori Elements",
+					additionalInformation: "SAPUI5.Component=orders",
+					applicationType : "URL",
+					url: "/orders/webapp",
+					navigationMode: "embedded"
+				}
+			}
+		};
+	</script>
+
+	<script id="sap-ushell-bootstrap" src="https://sapui5.hana.ondemand.com/test-resources/sap/ushell/bootstrap/sandbox.js"></script>
+	<script id="sap-ui-bootstrap" src="https://sapui5.hana.ondemand.com/resources/sap-ui-core.js"
+    	data-sap-ui-libs="sap.m, sap.ushell, sap.collaboration, sap.ui.layout"
+    	data-sap-ui-compatVersion="edge"
+    	data-sap-ui-theme="sap_fiori_3"
+    	data-sap-ui-frameOptions="allow"
+	></script>
+	<script>
+		sap.ui.getCore().attachInit(()=> sap.ushell.Container.createRenderer().placeAt("content"))
+	</script>
+
+</head>
+<body class="sapUiBody" id="content"></body>
+</html>

suppliers/app/admin/fiori-service.cds

@@ -0,0 +1,105 @@
+//using { AdminService } from '../../db/schema';
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Books Object Page
+//
+
+annotate AdminService.Books with @(
+	UI: {
+		Facets: [
+			{$Type: 'UI.ReferenceFacet', Label: '{i18n>General}', Target: '@UI.FieldGroup#General'},
+			{$Type: 'UI.ReferenceFacet', Label: '{i18n>Translations}', Target:  'texts/@UI.LineItem'},
+			{$Type: 'UI.ReferenceFacet', Label: '{i18n>Details}', Target: '@UI.FieldGroup#Details'},
+			{$Type: 'UI.ReferenceFacet', Label: '{i18n>Supplier}', Target: '@UI.FieldGroup#Supplier'},
+			{$Type: 'UI.ReferenceFacet', Label: '{i18n>Admin}', Target: '@UI.FieldGroup#Admin'},
+		],
+		FieldGroup#General: {
+			Data: [
+				{Value: title},
+				{Value: author_ID},
+				{Value: genre_ID},
+				{Value: descr},
+			]
+		},
+		FieldGroup#Details: {
+			Data: [
+				{Value: stock},
+				{Value: price},
+				{Value: currency_code, Label: '{i18n>Currency}'},
+			]
+		},
+		FieldGroup#Supplier: {
+			Data: [
+				{Value: supplier_ID, Label: '{i18n>Id}'},
+				{Value: supplier.name, Label: '{i18n>Name}'}
+			]
+		},
+		FieldGroup#Admin: {
+			Data: [
+				{Value: createdBy},
+				{Value: createdAt},
+				{Value: modifiedBy},
+				{Value: modifiedAt}
+			]
+		}
+	}
+);
+
+annotate AdminService.Authors with @(
+	UI: {
+		HeaderInfo: {
+			Description: {Value: lifetime}
+		},
+		Facets: [
+			{$Type: 'UI.ReferenceFacet', Label: '{i18n>Details}', Target: '@UI.FieldGroup#Details'},
+			{$Type: 'UI.ReferenceFacet', Label: '{i18n>Books}', Target: 'books/@UI.LineItem'},
+		],
+		FieldGroup#Details: {
+			Data: [
+				{Value: placeOfBirth},
+				{Value: placeOfDeath},
+				{Value: dateOfBirth},
+				{Value: dateOfDeath},
+				{Value: age, Label: '{i18n>Age}'},
+			]
+		},
+	}
+);
+
+
+
+////////////////////////////////////////////////////////////
+//
+//  Draft for Localized Data
+//
+
+annotate sap.capire.bookshop.Books with @fiori.draft.enabled;
+annotate AdminService.Books with @odata.draft.enabled;
+
+annotate AdminService.Books.texts with @(
+	UI: {
+		Identification: [{Value:title}],
+		SelectionFields: [ locale, title ],
+		LineItem: [
+			{Value: locale, Label: 'Locale'},
+			{Value: title, Label: 'Title'},
+			{Value: descr, Label: 'Description'}
+		]
+	}
+);
+
+// Add Value Help for Locales
+annotate AdminService.Books.texts {
+	locale @ValueList:{entity:'Languages',type:#fixed}
+}
+// In addition we need to expose Languages through AdminService
+using { sap } from '@sap/cds/common';
+extend service AdminService {
+	entity Languages as projection on sap.common.Languages;
+}
+
+annotate AdminService.Suppliers with
+	@(Capabilities.SearchRestrictions : {
+    	Searchable : false
+});

suppliers/app/admin/webapp/Component.js

@@ -0,0 +1,8 @@
+sap.ui.define(["sap/fe/core/AppComponent"], function(AppComponent) {
+	"use strict";
+	return AppComponent.extend("admin.Component", {
+		metadata: { manifest: "json" }
+	});
+});
+
+/* eslint no-undef:0 */

suppliers/app/admin/webapp/i18n/i18n.properties

@@ -0,0 +1,11 @@
+# This is the resource bundle of itelo
+# __ldi.translation.uuid=c3431418-9caf-11e8-98d0-529269fb1459
+
+# JCI app descriptor contains lower case TITLE
+appTitle=Bookshop Sample
+
+# JCI app descriptor contains lower case DESCRIPTION
+appSubTitle=CAP Sample Application
+
+# JCI app descriptor contains lower case DESCRIPTION
+appDescription=CDS Sample Service

suppliers/app/admin/webapp/manifest.json

@@ -0,0 +1,128 @@
+{
+    "_version": "1.8.0",
+    "sap.app": {
+        "id": "admin",
+        "type": "application",
+        "title": "Manage Books",
+        "description": "Sample Application",
+        "i18n": "i18n/i18n.properties",
+        "dataSources": {
+            "AdminService": {
+                "uri": "/admin/",
+                "type": "OData",
+                "settings": {
+                    "odataVersion": "4.0"
+                }
+            }
+        },
+        "-sourceTemplate": {
+            "id": "ui5template.basicSAPUI5ApplicationProject",
+            "-id": "ui5template.smartTemplate",
+            "-version": "1.40.12"
+        }
+    },
+    "sap.ui5": {
+        "dependencies": {
+            "libs": {
+                "sap.fe.templates": {}
+            }
+        },
+        "models": {
+            "i18n": {
+                "type": "sap.ui.model.resource.ResourceModel",
+                "uri": "i18n/i18n.properties"
+            },
+            "": {
+                "dataSource": "AdminService",
+                "settings": {
+                    "synchronizationMode": "None",
+                    "operationMode": "Server",
+                    "autoExpandSelect" : true,
+                    "earlyRequests": true,
+                    "groupProperties": {
+                        "default": {
+                            "submit": "Auto"
+                        }
+                    }
+                }
+            }
+        },
+        "routing": {
+            "routes": [
+                {
+                    "pattern": ":?query:",
+                    "name": "BooksList",
+                    "target": "BooksList"
+                },
+                {
+                    "pattern": "Books({key}):?query:",
+                    "name": "BooksDetails",
+                    "target": "BooksDetails"
+                },
+                {
+                    "pattern": "Books({key}/author({key2}):?query:",
+                    "name": "AuthorsDetails",
+                    "target": "AuthorsDetails"
+                }
+            ],
+            "targets": {
+                "BooksList": {
+                    "type": "Component",
+                    "id": "BooksList",
+                    "name": "sap.fe.templates.ListReport",
+                    "options": {
+                        "settings" : {
+                            "entitySet" : "Books",
+                            "navigation" : {
+                                "Books" : {
+                                    "detail" : {
+                                        "route" : "BooksDetails"
+                                    }
+                                }
+                            }
+                        }
+                    }
+                },
+                "BooksDetails": {
+                    "type": "Component",
+                    "id": "BooksDetailsList",
+                    "name": "sap.fe.templates.ObjectPage",
+                    "options": {
+                        "settings" : {
+                            "entitySet" : "Books",
+                            "navigation" : {
+                                "Authors" : {
+                                    "detail" : {
+                                        "route" : "AuthorsDetails"
+                                    }
+                                }
+                            }
+                        }
+                    }
+                },
+                "AuthorsDetails": {
+                    "type": "Component",
+                    "id": "AuthorsDetailsList",
+                    "name": "sap.fe.templates.ObjectPage",
+                    "options": {
+                        "settings" : {
+                            "entitySet" : "Authors"
+                        }
+                    }
+                }
+            }
+        },
+        "contentDensities": {
+            "compact": true,
+            "cozy": true
+        }
+    },
+    "sap.ui": {
+        "technology": "UI5",
+        "fullWidth": false
+    },
+    "sap.fiori": {
+        "registrationIds": [],
+        "archeType": "transactional"
+    }
+}

suppliers/app/common.cds

@@ -0,0 +1,265 @@
+/*
+	Common Annotations shared by all apps
+*/
+
+using { sap.capire.bookshop as my } from '@capire/bookshop';
+using { sap.common } from '@capire/common';
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Books Lists
+//
+annotate my.Books with @(
+	Common.SemanticKey: [title],
+	UI: {
+		Identification: [{Value:title}],
+		SelectionFields: [ ID, author_ID, price, currency_code, supplier.ID, supplier.name ],
+		LineItem: [
+			{Value: ID},
+			{Value: title},
+			{Value: author.name, Label:'{i18n>Author}'},
+			{Value: genre.name},
+			{Value: stock},
+			{Value: price},
+			{Value: currency.symbol, Label:' '},
+			{Value: supplier.ID},
+			{Value: supplier.name}
+		]
+	}
+) {
+	author @ValueList.entity:'Authors';
+};
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Books Details
+//
+annotate my.Books with @(
+	UI: {
+		HeaderInfo: {
+			TypeName: '{i18n>Book}',
+			TypeNamePlural: '{i18n>Books}',
+			Title: {Value: title},
+			Description: {Value: author.name}
+		},
+	}
+);
+
+
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Books Elements
+//
+annotate my.Books with {
+	ID @title:'{i18n>ID}' @UI.HiddenFilter;
+	title @title:'{i18n>Title}';
+	genre  @title:'{i18n>Genre}'  @Common: { Text: genre.name,  TextArrangement: #TextOnly };
+	author @title:'{i18n>Author}' @Common: { Text: author.name, TextArrangement: #TextOnly };
+	price @title:'{i18n>Price}' @Measures.ISOCurrency: currency_code;
+	stock @title:'{i18n>Stock}';
+	descr @UI.MultiLineText;
+	supplier_ID @title:'{i18n>Supplier}';
+}
+
+annotate my.Suppliers with {
+	name @title:'{i18n>SupplierName}';
+	ID @title:'{i18n>Supplier}';
+}
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Genres List
+//
+annotate my.Genres with @(
+	Common.SemanticKey: [name],
+	UI: {
+		SelectionFields: [ name ],
+		LineItem:[
+			{Value: name},
+			{Value: parent.name, Label: 'Main Genre'},
+		],
+	}
+);
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Genre Details
+//
+annotate my.Genres with @(
+	UI: {
+		Identification: [{Value:name}],
+		HeaderInfo: {
+			TypeName: '{i18n>Genre}',
+			TypeNamePlural: '{i18n>Genres}',
+			Title: {Value: name},
+			Description: {Value: ID}
+		},
+		Facets: [
+			{$Type: 'UI.ReferenceFacet', Label: '{i18n>SubGenres}', Target: 'children/@UI.LineItem'},
+		],
+	}
+);
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Genres Elements
+//
+annotate my.Genres with {
+	ID  @title: '{i18n>ID}';
+	name  @title: '{i18n>Genre}';
+}
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Authors List
+//
+annotate my.Authors with @(
+	Common.SemanticKey: [name],
+	UI: {
+		Identification: [{Value:name}],
+		SelectionFields: [ name ],
+		LineItem:[
+			{Value: ID},
+			{Value: name},
+			{Value: dateOfBirth},
+			{Value: dateOfDeath},
+			{Value: placeOfBirth},
+			{Value: placeOfDeath},
+		],
+	}
+);
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Author Details
+//
+annotate my.Authors with @(
+	UI: {
+		HeaderInfo: {
+			TypeName: '{i18n>Author}',
+			TypeNamePlural: '{i18n>Authors}',
+			Title: {Value: name},
+			Description: {Value: dateOfBirth}
+		},
+		Facets: [
+			{$Type: 'UI.ReferenceFacet', Target: 'books/@UI.LineItem'},
+		],
+	}
+);
+
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Authors Elements
+//
+annotate my.Authors with {
+	ID @title:'{i18n>ID}' @UI.HiddenFilter;
+	name @title:'{i18n>Name}';
+	dateOfBirth @title:'{i18n>DateOfBirth}';
+	dateOfDeath @title:'{i18n>DateOfDeath}';
+	placeOfBirth @title:'{i18n>PlaceOfBirth}';
+	placeOfDeath @title:'{i18n>PlaceOfDeath}';
+}
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Languages List
+//
+annotate common.Languages with @(
+	Common.SemanticKey: [code],
+	Identification: [{Value:code}],
+	UI: {
+		SelectionFields: [ name, descr ],
+		LineItem:[
+			{Value: code},
+			{Value: name},
+		],
+	}
+);
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Language Details
+//
+annotate common.Languages with @(
+	UI: {
+		HeaderInfo: {
+			TypeName: '{i18n>Language}',
+			TypeNamePlural: '{i18n>Languages}',
+			Title: {Value: name},
+			Description: {Value: descr}
+		},
+		Facets: [
+			{$Type: 'UI.ReferenceFacet', Label: '{i18n>Details}', Target: '@UI.FieldGroup#Details'},
+		],
+		FieldGroup#Details: {
+			Data: [
+				{Value: code},
+				{Value: name},
+				{Value: descr}
+			]
+		},
+	}
+);
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Currencies List
+//
+annotate common.Currencies with @(
+	Common.SemanticKey: [code],
+	Identification: [{Value:code}],
+	UI: {
+		SelectionFields: [ name, descr ],
+		LineItem:[
+			{Value: descr},
+			{Value: symbol},
+			{Value: code},
+		],
+	}
+);
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Currency Details
+//
+annotate common.Currencies with @(
+	UI: {
+		HeaderInfo: {
+			TypeName: '{i18n>Currency}',
+			TypeNamePlural: '{i18n>Currencies}',
+			Title: {Value: descr},
+			Description: {Value: code}
+		},
+		Facets: [
+			{$Type: 'UI.ReferenceFacet', Label: '{i18n>Details}', Target: '@UI.FieldGroup#Details'},
+			{$Type: 'UI.ReferenceFacet', Label: '{i18n>Extended}', Target: '@UI.FieldGroup#Extended'},
+		],
+		FieldGroup#Details: {
+			Data: [
+				{Value: name},
+				{Value: symbol},
+				{Value: code},
+				{Value: descr}
+			]
+		},
+		FieldGroup#Extended: {
+			Data: [
+				{Value: numcode},
+				{Value: minor},
+				{Value: exponent}
+			]
+		},
+	}
+);
+
+////////////////////////////////////////////////////////////////////////////
+//
+//	Currencies Elements
+//
+annotate common.Currencies with {
+	numcode @title:'{i18n>NumCode}';
+	minor @title:'{i18n>MinorUnit}';
+	exponent @title:'{i18n>Exponent}';
+}

suppliers/app/services.cds

@@ -0,0 +1,12 @@
+/*
+  This model controls what gets served to Fiori frontends...
+*/
+
+using from './admin/fiori-service';
+//using from './browse/fiori-service';
+using from './common';
+
+using from '@capire/common';
+
+// only works in case of embedded orders service
+using from '@capire/orders/app/orders/fiori-service';

suppliers/model.drawio

@@ -0,0 +1 @@
+<mxfile host="Electron" modified="2021-06-16T08:41:31.745Z" agent="5.0 (Macintosh; Intel Mac OS X 11_4_0) AppleWebKit/537.36 (KHTML, like Gecko) draw.io/14.6.13 Chrome/89.0.4389.128 Electron/12.0.7 Safari/537.36" etag="keOnkQccb51SB06o_xsB" version="14.6.13" type="device"><diagram id="kIZwyAu_b989F7xyfxsf" name="Page-1">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</diagram></mxfile>

suppliers/package.json

@@ -0,0 +1,32 @@
+{
+  "name": "@capire/suppliers",
+  "version": "1.0.0",
+  "description": "Shows integration with SAP S/4HANA, in turn provided as a reusable extension package to bookshop.",
+  "private": true,
+  "dependencies": {
+    "@capire/common": "*",
+    "@sap/cds": ">=4",
+    "express": "^4"
+  },
+  "scripts": {
+    "start": "cds run --in-memory?",
+    "watch": "cds watch",
+    "mocked-s4": "cds mock API_BUSINESS_PARTNER"
+  },
+  "cds": {
+    "requires": {
+      "API_BUSINESS_PARTNER": {
+        "kind": "odata",
+        "model": "srv/external/API_BUSINESS_PARTNER",
+        "[hybrid]": {
+          "credentials": {
+            "destination": "cap-api098",
+            "path": "/sap/opu/odata/sap/API_BUSINESS_PARTNER"
+          }
+        }
+      },
+      "[local-hybrid]": { "messaging": { "kind": "file-based-messaging" }},
+      "[hybrid]": { "messaging": { "kind": "enterprise-messaging-shared" }}
+    }
+  }
+}

suppliers/requests.http

@@ -0,0 +1,51 @@
+
+@server = http://localhost:4006
+@bpServer = http://localhost:5001
+@authAlice = Authorization: Basic alice:
+
+###
+### Replication on changed Business Partner
+###
+
+### 1. Check supplier name before update ("A Company Making Everything")
+
+GET {{server}}/admin/Books(299)?$expand=supplier
+{{authAlice}}
+
+### 2. Change Business Partner -> Triggers event that updates supplier replication
+
+PATCH {{bpServer}}/api-business-partner/A_BusinessPartner('ACME')
+Content-Type: application/json
+
+{
+    "BusinessPartnerFullName": "A Company Making Everything *better*"
+}
+
+### 3. Check supplier name after update ("A Company Making Everything *better*")
+
+GET {{server}}/admin/Books(299)?$expand=supplier
+{{authAlice}}
+
+###
+### Replication on new assigned supplier
+###
+
+### 1. No supplier is assigned to "Wuthering Heights"
+
+GET {{server}}/admin/Books(201)?$expand=supplier
+{{authAlice}}
+
+### 2. Assign supplier ID "PNG"
+
+PATCH {{server}}/admin/Books(201)
+{{authAlice}}
+Content-Type: application/json
+
+{
+    "supplier_ID": "PNG"
+}
+
+### 3. Supplier information is replicated
+
+GET {{server}}/admin/Books(201)?$expand=supplier
+{{authAlice}}

suppliers/server.js

@@ -0,0 +1,3 @@
+const cds = require ('@sap/cds')
+cds.once('served', require('./srv/mashup'))
+module.exports = cds.server

suppliers/srv/mashup.cds

@@ -0,0 +1,72 @@
+using { API_BUSINESS_PARTNER as S4 } from './external/API_BUSINESS_PARTNER.csn';
+using { CatalogService, sap.capire.bookshop.Books } from '@capire/bookshop';
+namespace sap.capire.bookshop;
+
+
+/**
+  Add projections to external entities to capture the subset of fields we're
+  actually interested in. This fosters both: (a) minimized network traffic as
+  well as (b) options to dynamically add extension fields by SaaS tenants.
+ */
+entity Suppliers as projection on S4.A_BusinessPartner {
+    key BusinessPartner as ID,
+    BusinessPartnerFullName as name,
+    // to_BusinessPartnerAddress[1: ValidityStartDate <= $now and $now < ValidityEndDate].CityName,
+    // to_BusinessPartnerAddress[1: ValidityStartDate <= $now and $now < ValidityEndDate].Country,
+}
+
+
+/**
+  We can mashup entities from external services, or projections thereof, with
+  our project's own entities, e.g. by adding relationships as below.
+ */
+extend Books with {
+  supplier : Association to Suppliers;
+}
+
+
+/*
+  Optionally expose external entities through own services, e.g. for Value Helps,
+  or to display details fetched on demand.
+  For this to work, we need to delegate the respective calls addressed to our
+  services into calls to the external service.
+ */
+extend service AdminService with {
+  @cds.odata.valuelist
+  entity Suppliers as projection on bookshop.Suppliers;
+}
+
+
+/*
+  Optionally add local persistency to replicate data for fast access,
+  e.g. to display lists containing remote data.
+ */
+annotate Suppliers with @cds.persistence: {table,skip:false};
+
+
+/**
+  Having locally cached replicas also allows to display supplier data in lists
+  of books, which otherwise would generate unwanted traffic on S4 backends.
+ */
+extend projection CatalogService.ListOfBooks with {
+  supplier.name as supplier
+}
+
+
+/**
+  Optionally declare events emitted from the source, but not included in
+  imported APIs (e.g. as in case of EDMXes from API Hub).
+
+  This allows CAP's advanced support for events and messaging to kick in,
+  e.g. to automatically emit to and subscribe to events from message brokers
+  behind the scenes.
+
+  Note: as sync and async APIs from S/4 sources are not correlated, we have
+  to specify the event type names, e.g. as be found at:
+  https://api.sap.com/event/SAPS4HANACloudBusinessEvents_BusinessPartner/resource
+ */
+extend service S4 {
+  event BusinessPartner.Changed @(type: 'sap.s4.beh.businesspartner.v1.BusinessPartner.Changed.v1') {
+    BusinessPartner: S4.A_BusinessPartner:BusinessPartner;
+  }
+}

suppliers/srv/mashup.js

@@ -0,0 +1,50 @@
+////////////////////////////////////////////////////////////////////////////
+//
+//    Mashing up provided and required services...
+//
+module.exports = async()=>{ // called by server.js
+
+  if (!cds.services.AdminService) return //> mocking S4 service only
+
+  // Connect to services we want to mashup below...
+  const S4bupa = await cds.connect.to('API_BUSINESS_PARTNER')   //> external S4 service
+  const admin = await cds.connect.to('AdminService')            //> local domain service
+  const db = await cds.connect.to('db')                         //> our primary database
+
+  // Reflect CDS definition of the Suppliers entity
+  const { Suppliers }  = db.entities
+
+  admin.prepend (()=>{ //> to ensure our .on handlers below go before the default ones
+
+    // Delegate Value Help reads for Suppliers to S4 backend
+    admin.on ('READ', 'Suppliers', req => {
+      console.log ('>> delegating to S4 service...')
+      return S4bupa.run(req.query)
+    })
+
+    // Replicate Supplier data when edited Books have suppliers
+    admin.after (['CREATE','UPDATE'], 'Books', async data => {
+      const { supplier_ID: ID } = data
+      if (ID) {
+        let replicated = await db.exists (Suppliers,ID)
+        if (!replicated) { // initially replicate Supplier info
+            let supplier = await S4bupa.read (Suppliers,ID)
+            await INSERT(supplier) .into (Suppliers)
+        }
+      }
+    })
+
+  })
+
+  // Subscribe to changes in the S4 origin of Suppliers data
+  S4bupa.on ('BusinessPartner.Changed', async msg => { //> would be great if we had batch events from S/4
+    console.log(">>", msg.event, msg.data)
+    const ID = msg.data.BusinessPartner;
+    let replicated = await db.exists (Suppliers,ID)
+    if (replicated) { // update replicated Supplier info
+      let supplier = await S4bupa.read (Suppliers,ID)
+      await UPDATE(Suppliers,ID) .with (supplier)
+    }
+  })
+
+}

suppliers/test/data/API_BUSINESS_PARTNER-A_BusinessPartner.csv

@@ -0,0 +1,7 @@
+BusinessPartner;BusinessPartnerFullName
+ACME;A Company Making Everything
+B4U;Books for You
+S&C;Shakespeare & Co.
+WSL;Waterstones
+TLD;Thalia
+PNG;Penguin Books