未加星标

Flowable's REST API - Part 2

字体大小 | |
[前端(javascript) 所属分类 前端(javascript) | 发布者 店小二03 | 时间 2019 | 作者 红领巾 ] 0人收藏点击收藏

In previous posts, I wrote about getting started with Flowable and working withFlowable's REST API.

In this post, we'll use Angular, Angular Material and Flowable's REST API to create a bespoke Task List component:


Flowable's REST API - Part 2
Flowable Library

Lets start by using the Angular CLI to generate an Angular Library:

ng generate library flowable --prefix=flow Tasks Service

Now lets use the Angular CLI to generate the Tasks Service:

ng generate service services/tasks/tasks --project=flowable

We can use Angular's HttpClient to interact with Flowable's REST API.

Let's take a look at the Tasks service's getTasks() method:

public getTasks(): Observable<TaskListModel> { const endpoint = '/flowable-task/process-api/runtime/tasks' return this.httpClient.get<any>(endpoint, httpOptions) .pipe( tap(() => { this.logger.info('TasksService: getTasks() completed'); }), catchError(this.handleError('getTasks', [])) ); }

The call to GET runtime/tasks returns a list of tasks. We just need to provide the endpoint's URI ('/flowable-task/process-api/runtime/tasks') and any required Http options:

const httpOptions = { headers: new HttpHeaders({ 'Content-Type': 'application/json', 'Authorization': 'Basic ' + btoa('admin:test') }), params: null }; CORS

During development we can use the proxying support in webpack's dev server to highjack certain URIs and send them to a backend server:

ng serve --proxy-config=proxy.conf.json

proxy.conf.json:

{ "/flowable-task": { "target": "http://localhost:8080", "secure": false, "logLevel": "debug" } } Task List Component

I used the Angular CLI to generate the Task List Component:

ng generate component components/task-list --project=flowable --skip-import

Let's take a look at the Task List component:

export class TaskListComponent implements OnInit, OnDestroy { public items: TaskModel[]; public selectedItem: TaskModel = null; private subscriptions: Subscription[] = []; constructor(private tasksService: TasksService, private logger: LoggerService) {} public ngOnInit() { let modelSubscription: Subscription = new Subscription(); this.subscriptions.push(modelSubscription); modelSubscription = this.tasksService.getTasks().subscribe(model => { this.items = model.data; this.selectedItem = this.items[0]; }); } ... }

We inject the TasksService and then in the component's ngOnInit() we call the Task service's getTasks() method.

Then in the component's view template we use a mat-nav-list to display the list of tasks:

<div class="crm-task-list-container"> <mat-nav-list> <a *ngFor="let item of items" mat-list-item [class.list-item-active]="item === selectedItem" (click)="onSelect(item)"> <mat-icon matListIcon class="crm-task-list-icon"> assignment </mat-icon> <p mat-line> {{item.name}} </p> <p mat-line> {{item.description}} </p> </a> </mat-nav-list> </div>

本文前端(javascript)相关术语:javascript是什么意思 javascript下载 javascript权威指南 javascript基础教程 javascript 正则表达式 javascript设计模式 javascript高级程序设计 精通javascript javascript教程

代码区博客精选文章
分页:12
转载请注明
本文标题:Flowable's REST API - Part 2
本站链接:https://www.codesec.net/view/627732.html


1.凡CodeSecTeam转载的文章,均出自其它媒体或其他官网介绍,目的在于传递更多的信息,并不代表本站赞同其观点和其真实性负责;
2.转载的文章仅代表原创作者观点,与本站无关。其原创性以及文中陈述文字和内容未经本站证实,本站对该文以及其中全部或者部分内容、文字的真实性、完整性、及时性,不作出任何保证或承若;
3.如本站转载稿涉及版权等问题,请作者及时联系本站,我们会及时处理。
登录后可拥有收藏文章、关注作者等权限...
技术大类 技术大类 | 前端(javascript) | 评论(0) | 阅读(242)