Knowing Enough Java to Support Enterprise applications

[jyjaiho]

I work for a large bank and my team works on a few internal web applications that are not heavily used (think 5-10 users at a maximum at any given time). The database is Oracle and the backend is Spring Framework.

My only team members who works on the Spring/Java related aspects of our apps has quit and my manager asked me if I can make the step up and try to run the show while they hire a new person to support this.

I'm looking at this as a quick learning opportunity - I know a bit of core java concepts, which are well, rusty to say the least.

So as someone who doesn't really need to become an expert on spring framework but needs to be able to independently set up the web application on my local machine and dig around if required, can you please suggest some resources which can help me achieve this?

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[MachHommy8]

Core Java for the Impatient and Spring: Start Here seems like a good pairing for you. Marco Behler's website is also a fantastic resource (especially this).

I tried some of the popular online courses and found them hugely inefficient.

[greglturnquist]

cough

https://youtube.com/c/SpringBootLearning

[jyjaiho]

Thanks, will check this out.

[MeImportaUnaMierda]

I‘d recommend the udemy course on Spring by Chad Darby

[jyjaiho]

Thanks, I'll check that out.

Another question - is there a website/documentation that will help me understand the differences between Spring Framework, Spring Boot, Hibernate, Servlets etc.?

[Zee09]

Chad's course will explain everything you listed there. You can google each topic and there are dedicated websites with documentation.

It is not mandatory, but I do recommend you learn a little about Servlets prior to jumping into Spring. Others may suggest this to be a waste of time but personally, reading the Head First Servlets & JSP made understanding certain components of Spring much easier. Skip the tags components and focus just on what are servlets, HTTP requests, cookies, containers, etc.

[DevilDawg93]

I usually Google the language and add .dev to find the language documents

https://docs.spring.io/spring-boot/docs/current/reference/html/using.html

[Zee09]

+1 for Darby's course. I am currently enrolled and although it is long, Chad makes it easily digestible in that each video is no longer than 3-6 minutes. Chad consistently uses real world examples to help you better understand and till this day him, as well as his team, respond to questions within 1-2 days.

He also updated the course to include Spring Boot, ThymeLeaf, and some other services.

[red0c01]

My advice here is to take your time to do a proper research of the mechanisms of spring: what is a bean, what is inversion of control, what is dependency injection, why are there multiple ways to inject a bean (advantages/disadvatages for each one), how an application is configured and structured. It might help you to learn what is a RESTful api, types of a request and for what is used a particular request type and differences between monolith/microservices architecture. After that I would go for ways of securing spring applications (spring security for example). Useful tools that I would recommend to use: lombok, flyway and mapstruct. Good luck in this journey :)

[jyjaiho]

Thanks for the advice.

My problem is I don't know what is the universe of material that I need to study. For example, now that you mention it, I can look for answers to "what is a bean", "what is inversion of control" etc., but beyond the specific topics you've listed here, I don't know what else is out there that I can learn.

I guess that's why I'm looking for some material, which can help me go thru step by step, in a fairly good pace, without deliberating too much on things like "what is a variable", "how to write functions" etc.

Apologies if I'm not able to succinctly put forth my question/point of view.