From the Trenches of the Enterprise Software

Yakov Fain

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Top Stories by Yakov Fain

In this blog I’ll show you how to guard routes in Angular 2 Router (currently at 3.0.0-beta.2). Let’s consider some scenarios that require a certain validation to be performed to decide if the user (or a program) is allowed to navigate to or leave the route: Allowed to open the route only if the user is authenticated and authorized to do so. Implement a multi-part form that consists of several components, and the user is allowed to navigate to the next form section only if the data entered in the current one is valid. Allow to navigate to a route only after a certain data structures have been populated. Remind the user about the unsaved changes if he or she tries to navigate from the route. The router has the hooks that give you more control over the navigation to/from a route, and you can use these hooks to implement the any of above scenarios to guard the routes. ... (more)

Secrets Of The Masters: Core Java Job Interview Questions

JDJ's Enterprise Editor, Yakov Fain (pictured) writes: If you are planning to hit the job market,  you may need to refresh some of the Java basic terms and techniques to prepare yourself for a technical interview. Let me offer you some of the core Java questions that you might expect during the interviews.  For  most questions  I’ve provided only  short  answers to encourage further research.  I have included only  questions for mid (*) and senior level (**) Java developers. These sample questions could also become handy for people who need to interview Java developers (see also ... (more)

Flex User Groups and Conflict of Interest

First of all, to add a little more credibility to what I’m about to write, let me just say that I’m running Princeton Java Users Group (JUG) for years and have a pretty good idea of how organization of the meetings and sponsorship work in such gatherings. Java community is huge, well established and has a loyal following of leaders and enthusiasts that are willing to spend some of their evenings meeting with their peers and attending presentations by either well known or by no so famous yet presenters. As a leader of this JUG I often receive emails asking to promote among our m... (more)

Our Flex Book is a Java Bestseller

Our new book "Enterprise Development with Flex " made the Amazon bestseller's list of ... Java books: See the list here. This list is refreshed every hour so I'm not sure what place you are going to find it at, but at the time of this writing it's #20. Help us to move up the list by doing you know what :) ... (more)

Starting an Angular 2 RC.1 Project | @CloudExpo #Angular2 #TypeScript #JavaScript

The current version of Angular is Release Candidate 1. This version changed the way how the framework is distributed – it comes as a set of scoped npm packages now. Any imports of the Angular classes will be done from @angular instead of angular2, for example: import {bootstrap} from '@angular/platform-browser-dynamic'; import {Component} from '@angular/core'; The content of package.json, index.html, and the configuration of the SystemJS loader has to be changed accordingly. This post is an extract of our book Angular 2 Development with Typescript, and it’ll show you how to get s... (more)