Spring Framework

Tips to Become a Java Expert

If you are a Java developer and passionate about technology, you can follow these ten steps which can make you an outstanding Java developer.

1. Have a solid foundation and understanding of OO principles
   For a Java developer, having a strong kind of object-oriented programming is a must. Without having a solid foundation on OOPS, one can’t understand the good looks of an object-oriented programming language like Java. If you don’t have a good knowledge of what OOPS is, even though you are using the OOP language, you may be still coding in a technical way. Just studying OO principle descriptions won’t help much. We should know how to apply those principles in designing a solution in an OO method. So, one should have a solid knowledge of object modeling, inheritance, polymorphism, design patterns, etc.
2. Master the core APIs
   It doesn’t substance how strong you are in terms of theoretical information if you don’t know the language constructs and core APIs. In the case of Java, one should have exact strong hands-on experience with core APIs like java.lang.*, I/O, exceptions, collections, generics, threads, JDBC, etc. When it comes to structure web applications, no matter which framework you are using, it’s also crucial that you understand concepts about servlets and JSPs — this is a must.
3. Keep coding
   Things look modest when talking about them theoretically. We can give a solution to a problem very simply in theory. But we can realize the depth of the problem when we start applying our approach. You will come to know the language limitations, or design best carry out while coding.
4. Subscribe to forums
   There are lots of people working on the same knowledge that we are working on. While doing a simple proof of concept on a framework may not give you actual challenges, when you start using it on real projects, you will face weird issues and won’t find any answer in their official documentation. When preliminary to work on new technology, the best and first thing to do is subscribe to relevant technology forums. Whatever the issue you are facing, someone else in the world might have previously faced it and found the solution. And it would be really actually great if you could answer the questions asked through other forum users.
5. Follow blogs and respond
   As I previously told, you are not alone. There are thousands of excited technology freaks around the world blogging their insights on technology. You can also gain valued perspectives on the same technology from other blogs and developers. Some may find specific framework features to be very useful, while others might find those countryside stupid and pointless, giving his own reasons of why he felt like that. So you can see both the good and the bad from other designers using those tools. One more way to gain value from looking at other blogs is to respond/comment on posts with your opinions and questions.
6. Read open-source frameworks’ source code
   A good developer will learn exactly how to use a framework. But if you lack to be an outstanding developer, you should learning the basics code of various successful, popular frameworks where you can see the internal working mechanism of the framework as well as best practices. It will help a lot in using when by frameworks in a more effective way.
7. Know the emerging technology trends
   In terms of open-source software development trends, they are developing tremendously. By the time you get a good idea on how to use an exact framework, it risks becoming obsolete as some new framework comes into the picture with super-set of features. Then, the problem you are trying to solve with your in progress framework may be already solved more easily by the new framework with a single line of configuration. So, hang onto an eye on what’s coming in the picture, and what’s going out.
8. Keep commonly used code snippets/utilities handy
   Over time, you may need to write/copy-paste the same part of code/configuration again and again. Keeping those kind of structure snippets like log4.properties, JDBC configuration, etc. and utilities like StringUtils, ReflectionUtils, DBUtils will be extra helpful. I know it, itself, won’t create you an outstanding developer. But just imagine some co-developer requests you to help in fetching the list of values of a property from a collection of objects, and then you just used your ReflectionUtil and gave the answer in a few minutes that will make you outstanding.
9. Know different development methodologies
   Be familiar with many kinds of methodologies like Agile, SCRUM, XP, Waterfall, etc. Nowadays, choosing the development methodology be contingent on the client. Some clients favor Agile and some clients are happy with the Waterfall model. So having an idea on many methodologies would be a real plus.
10. Document/blog your thoughts on technology
    In a day-to-day job, you may study new and better ways of doing things, as well as best practices, architectural ideas, etc. Keep documenting those thoughts, blog about them, and/or share them crossways the community. Imagine you explained a weird problem that happened while doing a simple POC and you blogged about it. Maybe developers away in the world are facing the same issue on a production-deployed application. Think of how valued that solution is to that developer. So, blog your point of view, they might be helpful for others or to yourself one day!

#java #javatraining #javacareer #javadeveloper #spring-framework

The Spring Integration Zip module and GraalVM native images with Spring Native

Hi, Spring fans! Welcome to another installment of Spring Tips! In this episode, we’ll look at some of the choice features in the new Spring Integration 5.5 release: the .ZIP archive support and the Spring Native support.

speaker: Josh Long
twitter: @starbuxman

#spring #spring-framework #java

Spring Tutorial - 4 - Constructor Injection with Annotations

In this episode, I show you how to inject dependencies with constructors and the Spring Framework.

Code: https://github.com/Spring-Framework-Tutorial/Constructor-Injection-with-Annotations

⭐ Kite is a free AI-powered coding assistant that will help you code faster and smarter. The Kite plugin integrates with all the top editors and IDEs to give you smart completions and documentation while you’re typing. I’ve tried it and it’s awesome! https://www.kite.com/get-kite/?utm_medium=referral&utm_source=youtube&utm_campaign=kodysimpson&utm_content=description-only

Discord: https://rebrand.ly/discordlink
Become a Member: https://www.youtube.com/channel/UC_LtbK9pzAEI-4yVprLOcyA/join
Instagram: https://www.instagram.com/kody_a_simpson/
Twitter: https://twitter.com/kodysimp

More Videos coming soon.
Leave a comment for any future video suggestions.

#spring-framework #spring-boot #java #spring

Spring Tips: Spring Retrosocket, an easy-to-use, proxy-powered client for RSocket

Hi, Spring fans! In this installment, Josh Long looks at Spring Retrosocket, an EXPERIMENTAL project designed to provide an OpenFeign- or Retrofit-like experience for RSocket clients.

http://github.com/spring-projects-experimental/spring-retrosocket/

#spring #spring-framework #spring-boot #java

Spring Tutorial - 3 - Inversion of Control and Beans

In this episode, I show you how achieve inversion of control using the Spring Framework and Java annotations, and how to retrieve beans from the ApplicationContext.

Code: https://gitlab.com/kody-simpson/spring-framework/inversion-of-control-and-beans
Slides: https://docs.google.com/presentation/d/1DaNxmgTUHjiBlil6ifGXn0MTZEboST171JsJZH5Fg7I/edit?usp=sharing

• 0:00:00 - Intro
• 0:00:28 - Beans
• 0:02:31 - Application Context
• 0:03:38 - Spring Bean Stereotypes (Annotations)
• 0:06:38 - Creating example Spring project
• 0:11:39 - Inversion of Control to Spring
• 0:19:46 - Component Scanning
• 0:21:25 - Outro

#java #spring #spring-framework #spring-boot

Learning Java Road-Map

Road-Map for Java Beginners

Prerequisites

Before you can jump into learning Java there are a few prerequisites that need to be satisfied. First of all, you need to have a basic understanding of how to use a computer, how to install applications on your computer and how to do basic configuration in the operating system, for setting up environmental variables (for example). Second of all you need to be comfortable with searching things on Google and following online tutorials, as many of the things you need in the beginning can be easily found online. Finally, it is a great plus knowing the English language as a high number of tutorials, courses and other useful information are easily found in English.

#roadmaps #software-development #java #spring-framework #learning java road-map #java road-map

Integration Testing in Spring Boot Application

Integration tests play a key role in ensuring the quality of the application. With a framework like Spring Boot, it is even easier to integrate such tests. Nevertheless, it is important to test applications with integration tests without deploying them to the application server.

Integration tests can help to test the data access layer of your application. Integration tests also help to test multiple units. For the Spring Boot application, we need to run an application in ApplicationContext to be able to run tests. Integration tests can also help in testing exception handling.

Spring Boot Application

For this demo, we will build a simple Spring Boot application with REST APIs. We will be using the H2 In-Memory database for storing the data. Eventually, I will show how to write an integration test. This application reads a JSON file of vulnerabilities from the National Vulnerability Database and stores it in the H2 database. REST APIs allow a user to fetch that data in a more readable format.

#java8 #spring-boot-2 #integration-testing #springboottest #spring-framework #integration testing in spring boot application

Using Heroku To Leverage CloudAMQP

This article is going to focus on invoicing clients for services that have been performed and will utilize messaging solutions within the Heroku ecosystem. The goals of the invoice process are as follows:

1. Quick and easy to use
2. Accurate and allow adjustments
3. Notify clients via SMS, including a link to an online invoice
4. Allow clients to submit payments using Venmo

Below, is a current version of the feature roadmap:

This article is going to focus on invoicing clients for services that have been performed and will utilize messaging solutions within the Heroku ecosystem. The goals of the invoice process are as follows:

Invoice Processing and Flow

In order to illustrate the flow for sending invoices, the following diagram was created:

I wanted to utilize a message-based approach, based upon my past experiences and satisfaction with the pattern. While one could argue that the current processing volume does not warrant a message-based approach, I did want to prove out this concept for use when the system gains more popularity.

#heroku #amqp #twilio #spring-boot #spring-framework #java #rabbitmq #tutorial

Get Started with Kotlin Multiplatform and Spring Boot

Get Started with Kotlin Multiplatform and Spring Boot Kotlin lets you build apps for different platforms. For web applications, that includes the JVM and the browser. In this talk, we will look at how to build a client-server application using Spring Boot and Kotlin on the server side and Kotlin/JS to power the client UI in the browser.

Demo project: https://github.com/OlegDokuka/collaborative-todo-list

#kotlin #multiplatform #spring #spring-framework

Top 5 Advanced Spring Boot Courses for Java Developers

Hello guys, Spring Boot is one of the top Java frameworks to learn in 2021, but as an advanced Java developer, just learning Spring Boot is not enough, you also need to learn all the technologies which make the eco-system like containers, could, testing spring Boot application, advanced Spring Boot features like Actuator, creating Microservices using Spring Boot, deploying Spring Boot applications on cloud platforms like AWS, Azure, and GCP.

A lot of Java developers have been asking me about courses that are tailored for Spring Boot and Java developers to learn technologies like containers, Docker, Kubernetes, and cloud platforms like AWS, Azure, and GCP.

So, today, I have decided to share some of the best-advanced Spring Boot courses for experienced Java developers from Udemy, Pluralsight, and other popular online platforms.

You can check out these courses if you want to take your Spring Boot skills to the next level as well as become a truly full-stack developer who understands Spring Boot applications end-to-end.

Here is my list of some of the advanced Spring Boot Courses for experienced Java developers.

#java #spring-framework #programming #webdev #spring #cource

The Apprentice's Guide to Spring Boot

Spring Boot is a web framework built on top of the framework Spring. It is designed for easier use and quicker implementation. It does so by configuring the application and its environment as automatically as possible. As a newcomer, I can say that it makes the framework really easy to get into.

My learning led me to read most of the reference documentation, which is well written and gives you a lot of insights into the internal behavior of Spring Boot. This documentation gives a lot of details, so this article aims to take the counter approach and pinpoint the concepts you will need to implement an API using Spring Boot. I will complement each section with a set of links to related documentation, may you want to dig further.

As a side note, this document will be using version 2.4.2 of the framework, on a Java project using Gradle as the build system. However, the information remains applicable to any compatible language and build system.

This article will cover the following aspects of creating an API with Spring Boot:

• Bootstrap the project
• Create REST endpoints
• Handle errors
• Connect to a persistence layer
• Paginate the results
• Test the application
• Package the Application

#spring-boot #tutorial #software-development #java #coding #programming #development #spring-framework #web-monetization

Spring Framework Tutorial

What is the spring framework in Java?

The spring framework is one of the most versatile frameworks in java which is used to bring down the complexity of the development of enterprise-grade applications. The first production release of the spring framework was in March 2004 and since then, this robust and open-source framework has gained tremendous popularity, so much so that it is often referred to by developers all around the world as the “framework of frameworks”. Spring is a loosely coupled, open-source application framework of java. It is lightweight and the inversion of the control container for the Java platform. A large number of Java applications use the core features of the spring framework. In addition to that, extensions have also been developed to allow developers to develop Web Applications on top of the Java Enterprise Edition platform.

#spring #spring-framework #java #spring framework tutorial #why should one learn about the spring framework? #what is the spring framework in java?

WS-2016-7107: CSRF tokens in Spring and the BREACH attack

Recently WhiteSource security scanner started reporting WS-2016-7107 against Spring-based applications. This is an old issue  in Spring Security that was reported in 2016. Unfortunately, at the moment of writing it, the issue has not been fixed yet. But there is a pull request  that should address it. The problem is that CSRF tokens generated by Spring Security are vulnerable to the BREACH  attack. The attack is even older — it was published in 2013. The BREACH attack is similar to the CRIME attack but BREACH doesn’t need TLS compression.

There are several conditions for a successful attack:

1. The attacker should be able to inject partially chosen plaintext into the victim’s requests (that is usually called chosen-plaintext attack model).
2. The attacker should be able to observe the encrypted traffic from the victim.
3. HTTP compression should be enabled.

TLS configuration doesn’t matter. In the case of a Spring-based application, a successful attack allows the attacker to recover the victim’s CSRF tokens. That’s what WS-2016-7107 is about.

The issue seems to get quite a lot of attention because WhiteSource reports it against almost all applications that use Spring Framework. Look at the number of linked WhiteSource reports in the original issue on GitHub. And that’s only projects on GitHub that use WhiteSource. What makes it worse is that the issue is still open. Therefore, it is not possible to fix this issue in an application just by bumping the version of Spring Security. Furthermore, if the proposed fix is accepted, it will be likely released only in the next major update of Spring Security because the fix updates the public API.

#java #security #software-development #spring-framework #vulnerability

Detect Dangerous Spring Service Exporters With CodeQL

How to make sure that CVE-2016-1000027 does not affect your application

In this blog post, I’ll talk about detecting unsafe Spring Exporters with a CodeQL query. First, I’ll describe the issue that received CVE-2016-1000027. Next, I’ll show what a vulnerable code looks like and how the issue can be mitigated in an application. Then, I’ll describe how the CodeQL query works. In addition, I’ll show a couple of vulnerabilities that have been found by the query.

#codeql #spring-framework #vulnerability #security #java

Here's Why Java Is Still Alive And Kicking

Java in 2020 is overgrown with new features and was released twice right on schedule, despite the global turmoil. Java will remain one of the main platforms for developing enterprise applications (that is, corporate applications used by large companies to make money.

Every year they predict a quick death to Java, but this doesn’t happen, and it won’t happen very soon (it will never happen!, anonymous note). Java in 2020 is overgrown with new features and was released twice right on schedule, despite the global turmoil.

Naturally, there are global trends, and the main one is “Covid-19 and how to get out of it”. This very “how to get out” and corrected to some extent with IT trends and now about everything in order. So let’s start with what awaits our favorite language directly, and then — what awaits the IT sphere. The development of which, of course, affects such tools as Java.

#java #trends #tech-trends #backend #spring-boot #spring-framework #kubernetes #software-development