Adding source code for article tracked under BAEL-4080. (#9552)

Co-authored-by: CHANDRAKANT Kumar <[email protected]>
2020-07-14 17:55:54 +02:00
parent 8756adc2d5
commit 7c344b57c3
102 changed files with 17479 additions and 0 deletions
@@ -558,6 +558,7 @@
                <module>rxjava-operators</module>

 				<module>atomikos</module>
+				<module>reactive-systems</module>
            </modules>

        </profile>
@@ -1069,6 +1070,7 @@
                <module>rxjava-operators</module>

 				<module>atomikos</module>
+				<module>reactive-systems</module>
            </modules>

        </profile>
@@ -0,0 +1,7 @@
+## Reactive Systems in Java
+
+This module contains services for article about reactive systems in Java. Please note that these secrives comprise parts of a full stack application to demonstrate the capabilities of a reactive system. Unless there is an article which extends on this concept, this is probably not a suitable module to add other code.
+
+### Relevant Articles
+
+- [Reactive Systems in Java](https://www.baeldung.com/)
@@ -0,0 +1,4 @@
+FROM nginx:alpine
+COPY nginx.conf /etc/nginx/nginx.conf
+WORKDIR /usr/share/nginx/html
+COPY dist/frontend .
@@ -0,0 +1,27 @@
+# Frontend
+
+This project was generated with [Angular CLI](https://github.com/angular/angular-cli) version 9.1.6.
+
+## Development server
+
+Run `ng serve` for a dev server. Navigate to `http://localhost:4200/`. The app will automatically reload if you change any of the source files.
+
+## Code scaffolding
+
+Run `ng generate component component-name` to generate a new component. You can also use `ng generate directive|pipe|service|class|guard|interface|enum|module`.
+
+## Build
+
+Run `ng build` to build the project. The build artifacts will be stored in the `dist/` directory. Use the `--prod` flag for a production build.
+
+## Running unit tests
+
+Run `ng test` to execute the unit tests via [Karma](https://karma-runner.github.io).
+
+## Running end-to-end tests
+
+Run `ng e2e` to execute the end-to-end tests via [Protractor](http://www.protractortest.org/).
+
+## Further help
+
+To get more help on the Angular CLI use `ng help` or go check out the [Angular CLI README](https://github.com/angular/angular-cli/blob/master/README.md).
@@ -0,0 +1,125 @@
+{
+  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
+  "version": 1,
+  "newProjectRoot": "projects",
+  "projects": {
+    "frontend": {
+      "projectType": "application",
+      "schematics": {},
+      "root": "",
+      "sourceRoot": "src",
+      "prefix": "app",
+      "architect": {
+        "build": {
+          "builder": "@angular-devkit/build-angular:browser",
+          "options": {
+            "outputPath": "dist/frontend",
+            "index": "src/index.html",
+            "main": "src/main.ts",
+            "polyfills": "src/polyfills.ts",
+            "tsConfig": "tsconfig.app.json",
+            "aot": true,
+            "assets": [
+              "src/favicon.ico",
+              "src/assets"
+            ],
+            "styles": [
+              "node_modules/bootstrap/dist/css/bootstrap.min.css",
+              "src/styles.css"
+            ],
+            "scripts": []
+          },
+          "configurations": {
+            "production": {
+              "fileReplacements": [
+                {
+                  "replace": "src/environments/environment.ts",
+                  "with": "src/environments/environment.prod.ts"
+                }
+              ],
+              "optimization": true,
+              "outputHashing": "all",
+              "sourceMap": false,
+              "extractCss": true,
+              "namedChunks": false,
+              "extractLicenses": true,
+              "vendorChunk": false,
+              "buildOptimizer": true,
+              "budgets": [
+                {
+                  "type": "initial",
+                  "maximumWarning": "2mb",
+                  "maximumError": "5mb"
+                },
+                {
+                  "type": "anyComponentStyle",
+                  "maximumWarning": "6kb",
+                  "maximumError": "10kb"
+                }
+              ]
+            }
+          }
+        },
+        "serve": {
+          "builder": "@angular-devkit/build-angular:dev-server",
+          "options": {
+            "browserTarget": "frontend:build"
+          },
+          "configurations": {
+            "production": {
+              "browserTarget": "frontend:build:production"
+            }
+          }
+        },
+        "extract-i18n": {
+          "builder": "@angular-devkit/build-angular:extract-i18n",
+          "options": {
+            "browserTarget": "frontend:build"
+          }
+        },
+        "test": {
+          "builder": "@angular-devkit/build-angular:karma",
+          "options": {
+            "main": "src/test.ts",
+            "polyfills": "src/polyfills.ts",
+            "tsConfig": "tsconfig.spec.json",
+            "karmaConfig": "karma.conf.js",
+            "assets": [
+              "src/favicon.ico",
+              "src/assets"
+            ],
+            "styles": [
+              "src/styles.css"
+            ],
+            "scripts": []
+          }
+        },
+        "lint": {
+          "builder": "@angular-devkit/build-angular:tslint",
+          "options": {
+            "tsConfig": [
+              "tsconfig.app.json",
+              "tsconfig.spec.json",
+              "e2e/tsconfig.json"
+            ],
+            "exclude": [
+              "**/node_modules/**"
+            ]
+          }
+        },
+        "e2e": {
+          "builder": "@angular-devkit/build-angular:protractor",
+          "options": {
+            "protractorConfig": "e2e/protractor.conf.js",
+            "devServerTarget": "frontend:serve"
+          },
+          "configurations": {
+            "production": {
+              "devServerTarget": "frontend:serve:production"
+            }
+          }
+        }
+      }
+    }},
+  "defaultProject": "frontend"
+}
@@ -0,0 +1,12 @@
+# This file is used by the build system to adjust CSS and JS output to support the specified browsers below.
+# For additional information regarding the format and rule options, please see:
+# https://github.com/browserslist/browserslist#queries
+
+# You can see what browsers were selected by your queries by running:
+#   npx browserslist
+
+> 0.5%
+last 2 versions
+Firefox ESR
+not dead
+not IE 9-11 # For IE 9-11 support, remove 'not'.
@@ -0,0 +1,32 @@
+// @ts-check
+// Protractor configuration file, see link for more information
+// https://github.com/angular/protractor/blob/master/lib/config.ts
+
+const { SpecReporter } = require('jasmine-spec-reporter');
+
+/**
+ * @type { import("protractor").Config }
+ */
+exports.config = {
+  allScriptsTimeout: 11000,
+  specs: [
+    './src/**/*.e2e-spec.ts'
+  ],
+  capabilities: {
+    browserName: 'chrome'
+  },
+  directConnect: true,
+  baseUrl: 'http://localhost:4200/',
+  framework: 'jasmine',
+  jasmineNodeOpts: {
+    showColors: true,
+    defaultTimeoutInterval: 30000,
+    print: function() {}
+  },
+  onPrepare() {
+    require('ts-node').register({
+      project: require('path').join(__dirname, './tsconfig.json')
+    });
+    jasmine.getEnv().addReporter(new SpecReporter({ spec: { displayStacktrace: true } }));
+  }
+};
@@ -0,0 +1,23 @@
+import { AppPage } from './app.po';
+import { browser, logging } from 'protractor';
+
+describe('workspace-project App', () => {
+  let page: AppPage;
+
+  beforeEach(() => {
+    page = new AppPage();
+  });
+
+  it('should display welcome message', () => {
+    page.navigateTo();
+    expect(page.getTitleText()).toEqual('frontend app is running!');
+  });
+
+  afterEach(async () => {
+    // Assert that there are no errors emitted from the browser
+    const logs = await browser.manage().logs().get(logging.Type.BROWSER);
+    expect(logs).not.toContain(jasmine.objectContaining({
+      level: logging.Level.SEVERE,
+    } as logging.Entry));
+  });
+});
@@ -0,0 +1,11 @@
+import { browser, by, element } from 'protractor';
+
+export class AppPage {
+  navigateTo(): Promise<unknown> {
+    return browser.get(browser.baseUrl) as Promise<unknown>;
+  }
+
+  getTitleText(): Promise<string> {
+    return element(by.css('app-root .content span')).getText() as Promise<string>;
+  }
+}
@@ -0,0 +1,13 @@
+{
+  "extends": "../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../out-tsc/e2e",
+    "module": "commonjs",
+    "target": "es5",
+    "types": [
+      "jasmine",
+      "jasminewd2",
+      "node"
+    ]
+  }
+}
@@ -0,0 +1,32 @@
+// Karma configuration file, see link for more information
+// https://karma-runner.github.io/1.0/config/configuration-file.html
+
+module.exports = function (config) {
+  config.set({
+    basePath: '',
+    frameworks: ['jasmine', '@angular-devkit/build-angular'],
+    plugins: [
+      require('karma-jasmine'),
+      require('karma-chrome-launcher'),
+      require('karma-jasmine-html-reporter'),
+      require('karma-coverage-istanbul-reporter'),
+      require('@angular-devkit/build-angular/plugins/karma')
+    ],
+    client: {
+      clearContext: false // leave Jasmine Spec Runner output visible in browser
+    },
+    coverageIstanbulReporter: {
+      dir: require('path').join(__dirname, './coverage/frontend'),
+      reports: ['html', 'lcovonly', 'text-summary'],
+      fixWebpackSourcePaths: true
+    },
+    reporters: ['progress', 'kjhtml'],
+    port: 9876,
+    colors: true,
+    logLevel: config.LOG_INFO,
+    autoWatch: true,
+    browsers: ['Chrome'],
+    singleRun: false,
+    restartOnFileChange: true
+  });
+};
@@ -0,0 +1,25 @@
+worker_processes  1;
+
+events {
+    worker_connections  1024;
+}
+
+http {
+    server {
+        listen 80;
+        server_name  localhost;
+
+        root   /usr/share/nginx/html;
+        index  index.html index.htm;
+        include /etc/nginx/mime.types;
+
+        gzip on;
+        gzip_min_length 1000;
+        gzip_proxied expired no-cache no-store private auth;
+        gzip_types text/plain text/css application/json application/javascript application/x-javascript text/xml application/xml application/xml+rss text/javascript;
+
+        location / {
+            try_files $uri $uri/ /index.html;
+        }
+    }
+}
@@ -0,0 +1,47 @@
+{
+  "name": "frontend",
+  "version": "0.0.0",
+  "scripts": {
+    "ng": "ng",
+    "start": "ng serve",
+    "build": "ng build",
+    "test": "ng test",
+    "lint": "ng lint",
+    "e2e": "ng e2e"
+  },
+  "private": true,
+  "dependencies": {
+    "@angular/animations": "~9.1.7",
+    "@angular/common": "~9.1.7",
+    "@angular/compiler": "~9.1.7",
+    "@angular/core": "~9.1.7",
+    "@angular/forms": "~9.1.7",
+    "@angular/platform-browser": "~9.1.7",
+    "@angular/platform-browser-dynamic": "~9.1.7",
+    "@angular/router": "~9.1.7",
+    "bootstrap": "^4.5.0",
+    "rxjs": "~6.5.4",
+    "tslib": "^1.10.0",
+    "zone.js": "~0.10.2"
+  },
+  "devDependencies": {
+    "@angular-devkit/build-angular": "~0.901.6",
+    "@angular/cli": "~9.1.6",
+    "@angular/compiler-cli": "~9.1.7",
+    "@types/node": "^12.11.1",
+    "@types/jasmine": "~3.5.0",
+    "@types/jasminewd2": "~2.0.3",
+    "codelyzer": "^5.1.2",
+    "jasmine-core": "~3.5.0",
+    "jasmine-spec-reporter": "~4.2.1",
+    "karma": "~5.0.0",
+    "karma-chrome-launcher": "~3.1.0",
+    "karma-coverage-istanbul-reporter": "~2.1.0",
+    "karma-jasmine": "~3.0.1",
+    "karma-jasmine-html-reporter": "^1.4.2",
+    "protractor": "~5.4.3",
+    "ts-node": "~8.3.0",
+    "tslint": "~6.1.0",
+    "typescript": "~3.8.3"
+  }
+}
@@ -0,0 +1 @@
+<app-orders></app-orders>
@@ -0,0 +1,31 @@
+import { TestBed, async } from '@angular/core/testing';
+import { AppComponent } from './app.component';
+
+describe('AppComponent', () => {
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [
+        AppComponent
+      ],
+    }).compileComponents();
+  }));
+
+  it('should create the app', () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    const app = fixture.componentInstance;
+    expect(app).toBeTruthy();
+  });
+
+  it(`should have as title 'frontend'`, () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    const app = fixture.componentInstance;
+    expect(app.title).toEqual('frontend');
+  });
+
+  it('should render title', () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    fixture.detectChanges();
+    const compiled = fixture.nativeElement;
+    expect(compiled.querySelector('.content span').textContent).toContain('frontend app is running!');
+  });
+});
@@ -0,0 +1,10 @@
+import { Component } from '@angular/core';
+
+@Component({
+  selector: 'app-root',
+  templateUrl: './app.component.html',
+  styleUrls: ['./app.component.css']
+})
+export class AppComponent {
+  title = 'frontend';
+}
@@ -0,0 +1,29 @@
+import { BrowserModule } from '@angular/platform-browser';
+import { NgModule } from '@angular/core';
+
+import { AppComponent } from './app.component';
+import { OrdersComponent } from './orders/orders.component';
+
+import { ReactiveFormsModule } from '@angular/forms';
+import { HttpClientModule } from '@angular/common/http';
+
+import { OrdersBlockingService } from './orders/orders-blocking.service';
+import { OrdersReactiveService } from './orders/orders-reactive.service';
+
+@NgModule({
+  declarations: [
+    AppComponent,
+    OrdersComponent
+  ],
+  imports: [
+    BrowserModule,
+    ReactiveFormsModule,
+    HttpClientModule
+  ],
+  providers: [
+    OrdersBlockingService,
+    OrdersReactiveService
+  ],
+  bootstrap: [AppComponent]
+})
+export class AppModule { }
@@ -0,0 +1,16 @@
+import { Injectable } from '@angular/core';
+import { HttpClient } from "@angular/common/http";
+import { Observable } from 'rxjs';
+
+@Injectable()
+export class OrdersBlockingService {
+
+  url: string = 'http://localhost:8080/api/orders'
+
+  constructor(private http: HttpClient) {}
+
+  getOrders() {
+    return this.http.get(this.url)
+  }
+
+}
@@ -0,0 +1,42 @@
+import { Injectable, NgZone } from '@angular/core';
+import { Observable } from 'rxjs';
+const EventSource: any = window['EventSource'];
+
+@Injectable()
+export class OrdersReactiveService {
+
+  url: string = 'http://localhost:8080/api/orders'
+
+  orders: string[] = []
+
+  constructor(private _zone: NgZone) {}
+
+  getOrderStream() {
+    this.orders = []
+    return Observable.create((observer) => {
+      let eventSource = new EventSource(this.url)
+      eventSource.onmessage = (event) => {
+        console.log('Received event: ', event)
+        let json = JSON.parse(event.data)
+        this.orders.push(json);
+        this._zone.run(() => {
+          observer.next(this.orders)
+        })
+      }
+      eventSource.onerror = (error) => {
+        if(eventSource.readyState === 0) {
+          console.log('The stream has been closed by the server.')
+          eventSource.close()
+          this._zone.run(() => {
+            observer.complete()
+          })
+        } else {
+          this._zone.run(() => {
+            observer.error('EventSource error: ' + error)
+          })
+        }
+      }
+    })
+  }
+
+}
@@ -0,0 +1,60 @@
+<div class="container">
+  <h2>Please place a new Order!</h2>
+</div>
+<div class="container" *ngIf="response !== null">
+  <h3>Your order {{response.id}} was successfully placed, please check the status of order.</h3>
+</div>
+<div class="container" *ngIf="error !== null">
+  <h3>Your order could not be placed at the moment: {{error.message}}</h3>
+</div>
+<div class="container">
+  <form [formGroup]="form" *ngIf="this.form" (ngSubmit)="createOrder()">
+    <h3 class="container">Product Quantities:</h3>
+    <div class="container" formArrayName="lineItems"
+         *ngFor="let item of form.get('lineItems')['controls']; let i = index;">
+      <li class="form-group input-group-lg" [formGroupName]="i">
+        {{ form.controls.lineItems['controls'][i].controls.name.value }}: <input formControlName='quantity' placeholder='10'>
+        <p>Only {{ form.controls.lineItems['controls'][i].controls.stock.value }} left in the stock!</p>
+      </li>
+    </div>
+    &nbsp;
+    <div class="container">
+      <h3>Payment Mode:
+      <select class="form-group input-group-lg" formControlName="paymentMode">
+        <option *ngFor="let paymentMode of paymentModes">
+          {{paymentMode}}
+        </option>
+      </select>
+      </h3>
+    </div>
+    &nbsp;
+    <div class="container" formGroupName="shippingAddress">
+      <h3>Address:</h3>
+      <input class="form-control" placeholder="Name" formControlName="name">
+      <input class="form-control" placeholder="House" formControlName="house">
+      <input class="form-control" placeholder="Street" formControlName="street">
+      <input class="form-control" placeholder="City" formControlName="city">
+      <input class="form-control" placeholder="Zip" formControlName="zip">
+    </div>
+    &nbsp;
+    <div class="form-group">
+      <button class="btn btn-danger btn-block btn-lg">Place Order</button>
+    </div>
+  </form>
+</div>
+
+<div class="container">
+  <button class="btn btn-danger btn-block btn-lg" (click)="getOrders()">Get Previous Orders</button>
+</div>
+
+<div class="container">
+  <button class="btn btn-danger btn-block btn-lg" (click)="getOrderStream()">Get Previous Order Stream </button>
+</div>
+<div class="container" *ngIf="previousOrders !== null">
+  <h2>Your orders placed so far:</h2>
+  <ul>
+    <li *ngFor="let order of previousOrders | async">
+      <p>Order ID: {{ order.id }}, Order Status: {{order.orderStatus}}, Order Message: {{order.responseMessage}}</p>
+    </li>
+  </ul>
+</div>
@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { OrdersComponent } from './orders.component';
+
+describe('OrdersComponent', () => {
+  let component: OrdersComponent;
+  let fixture: ComponentFixture<OrdersComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ OrdersComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(OrdersComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});
@@ -0,0 +1,104 @@
+import { Component, OnInit } from '@angular/core';
+import { FormBuilder, FormGroup, FormControl, FormArray } from "@angular/forms";
+import { HttpClient, HttpHeaders } from '@angular/common/http';
+import { Observable } from 'rxjs';
+import { OrdersBlockingService } from './orders-blocking.service';
+import { OrdersReactiveService } from './orders-reactive.service';
+
+@Component({
+  selector: 'app-orders',
+  templateUrl: './orders.component.html',
+  styleUrls: ['./orders.component.css']
+})
+
+export class OrdersComponent implements OnInit {
+  form: FormGroup
+  response: any
+  error: any
+  previousOrders: Observable<Object>
+  itemList: any
+  paymentModes: any
+
+  constructor(public fb: FormBuilder, private http: HttpClient,
+    private ordersBlockingService: OrdersBlockingService,
+    private ordersReactiveService: OrdersReactiveService) {
+      this.paymentModes = this.fetchPaymentModes()
+      this.fetchProducts().then(data => this.form = this.createForm());
+  }
+
+  ngOnInit() {
+      this.response = null
+      this.error = null
+      this.previousOrders = null
+  }
+
+  createForm() {
+      let fb = this.fb
+      let form = fb.group({
+        userId: 'Bob Marley',
+        paymentMode: [this.paymentModes[0]],
+        lineItems: this.fb.array([]),
+        shippingAddress: this.fb.group({
+          name: ['Bob Marley'],
+          house: ['24'],
+          street: ['Ashford Av.'],
+          city: ['New York'],
+          zip: ['11001']
+        })
+      })
+      let items = this.itemList
+      items.forEach(function (value, index) {
+        (<FormArray>form.get('lineItems')).push(fb.group({
+          'productId':items[index].id,
+          'name': items[index].name,
+          'stock': items[index].stock,
+          'quantity': 10}
+        ))
+      });
+      return form
+  }
+
+  async fetchProducts() {
+      let products = [
+        {"id":"p001", "name": "Product A1", "stock": 101},
+        {"id":"p002", "name": "Product A2", "stock": 102}
+      ]
+      let data  = await this.http.get('http://localhost:8081/api/products').toPromise()
+      this.itemList = data
+  }
+
+  fetchPaymentModes() {
+      let paymentModes = ["Cash on Delivery", "Card on Delivery"]
+      return paymentModes
+  }
+
+  createOrder() {
+      let headers = new HttpHeaders({
+        'Content-Type': 'application/json'
+      });
+      let options = {
+        headers: headers
+      }
+      this.http.post('http://localhost:8080/api/orders', this.form.value, options).subscribe(
+        (response) => {
+          console.log(response)
+          this.error = null
+          this.response = response
+        },
+        (error) => {
+          console.log(error)
+          this.response = null
+          this.error = error
+        }
+      )
+  }
+
+  getOrders() {
+      this.previousOrders = this.ordersBlockingService.getOrders()
+  }
+
+  getOrderStream() {
+      this.previousOrders = this.ordersReactiveService.getOrderStream()
+  }
+
+}
@@ -0,0 +1,3 @@
+export const environment = {
+  production: true
+};
@@ -0,0 +1,16 @@
+// This file can be replaced during build by using the `fileReplacements` array.
+// `ng build --prod` replaces `environment.ts` with `environment.prod.ts`.
+// The list of file replacements can be found in `angular.json`.
+
+export const environment = {
+  production: false
+};
+
+/*
+ * For easier debugging in development mode, you can import the following file
+ * to ignore zone related error stack frames such as `zone.run`, `zoneDelegate.invokeTask`.
+ *
+ * This import should be commented out in production mode because it will have a negative impact
+ * on performance if an error is thrown.
+ */
+// import 'zone.js/dist/zone-error';  // Included with Angular CLI.
@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <title>Frontend</title>
+  <base href="/">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="icon" type="image/x-icon" href="favicon.ico">
+</head>
+<body>
+  <app-root></app-root>
+</body>
+</html>
--- a/Show More
+++ b/Show More