I am new to Spring Batch. I want to understand by making some simple Hello World or by reading a CSV file. On internet I saw many examples but everyone is explaining the code but nobody is talking about project structure or how to create project in eclipse or STS. Please provide me links which can explain the process very simple or share the articles for it.
You can download and import a simple Spring Batch project directly from STS:
Click: File -> New -> Spring Project
In the "New Spring Project" Window, under "Templates", expand the "Batch" folder.
Click on "Simple Spring Batch Project", provide aproject name and click the "Next" button.
That's it. The project has what I would call a simple spring and spring-batch standard setup. You can easily extend it by adding an ORM-framework or whatever you like ...
There is a guide providing exactly what you are looking for (how to structure the project, Maven/Gradle config, code, etc) on the spring.io web site:
http://spring.io/guides/gs/batch-processing/
It's generally a good idea to follow the tutorials on spring.io before following tutorials from anyone else.
Related
I'm fairly new to Spring Boot and MongoDB. Currently I have a project that can send data back and forth to a server that is running locally on my computer, but I want to change this and make it edit and retrieve data from an externally running database. In other tutorials I have followed I have had an application.properties file that I can edit details in to get it to connect, but I can't find this in any of the sub folders (I pulled the code from a tutorial) and I can't find anything to say that it is specifically connecting to the local instance.
Would it be okay to just create the application.properties file in the right sub folder and enter the external database's details there? Or am I going to have to try a separate method and tutorial to try and connect to the external database in another way?
I have a feeling that to answer it you will need to see/understand more of the code, but I'm not sure how to summarise anything else or what would actually be relevant. Thank you.
Spring Boot has several default folders, where it searches for properties.
One of those places is for example src/main/resources/application.properties, there you can just create this file.
An overview of other possible places for Spring Boot properties can be found here:
https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html
In my German blog I wrote an article about how to use Spring-data to access MongoDB - there I used also application.properties file:
https://agile-coding.blogspot.com/2020/10/keine-ahnung-von-mongodb-dann-nimm.html
I want to add a new menu to spring batch admin,
I have gone through the docs but not helpful, can anyone please help me with an example also where to put FTL files for that menu.
Thanks in advance
Your question is far too open ended.
HERE is an example of how to customize spring-batch admin.
Be advised that spring batch admin is at end of life and the last milestone release has quite a few issues in its POM dependencies. You'll need liberal use of maven exclude elements to get it to compile without a ton of dependency conflicts.
End Of Life Announcement
Per the above you should look into "Spring Cloud Data Flow" instead of spring-batch-admin. I have not used this yet, but the maven issues in the milestone release were a huge pain. Honestly I never did get it to work the way I wanted.
All that said your FTL files go in the webapp/WEB-INF/web directory tree.
Good luck
To add a menu in SBA, you need to develop following components:
A class that extends the BaseMenu (Class implementing the SBA menu interface).
A Controller class handling the request issued on click of you menu
A View bean
A Freemarker template implementing the view.
Template files are looked at WEB-INF/web. Place your template file under WEB-INF/web/ftl.
I’ve been trying to set up a Spring MVC application from scratch, using Maven, in IntelliJ Idea. I know there are probably some nice Archetypes that can do this for you, but I really want to understand what’s going on. Here’s what I want to do:
Create a simple web application that shows displays “Hello World” under https://localhost:8080/, using an embedded Tomcat (with the Maven plugin). So, one controller, one request mapping, and one template. I’ve been able to get the spring application to boot (the Spring logo appears in the console) and Tomcat seems to run as well (the site responds). The problem is, I haven’t been able to get the request to map to my RequestMap method in my Controller. I’m quite sure that the controller isn’t the problem, but that it’s some configuration/setup issue.
Here’s the thing: I’ve been looking at tutorials, StackOverflow, Spring documentation, etc. for hours now, but I haven’t found a source that really explains how to configure a Spring MVC Maven project. Everyone seems to have a different opinion on what XML files you need, what they should be named, and where they should be located. The consensus seems to be that you need a web.xml file in a folder named WEB-INF, but even there, everyone has a different opinion on where that folder should go. I appreciate that there are multiple different ways to do this, and that there’s no “right” way, but in my experience, there are definitely many “wrong” ways =).
My question right now isn’t necessarily how to get my current project running (I don’t mind starting over), but what kinds of config files are out there (web, spring, app-config, servlet, …), what they do, which ones you need, where they need to go, what they should be named, how they connect, etc. Some people also use the Maven Compiler plugin, and others don’t, and nobody says why :D. Essentially: How do I let Spring know where to find controllers, templates, etc., and how to run and deploy all of this on the embedded Tomcat. I would like to find a source that explains the entire core-ecosystem of Spring MVC in a unified way. I have found many sources that provide “how-to” tutorials, but with little to no explanation (like “add the following servlet.xml file to your WEB-INF folder”). So, if your setup slightly differs from the tutorial (e.g. because you are using IntelliJ instead of Eclipse, Tomcat instead of Jetty, embedded Tomcat, a slightly different folder structure) nothing works, and, most importantly, you have no clue why.
Has anyone learned these setup-basics with anything better than copy/pasting or trial & error? :D
Easiest way to start is by using Spring Boot. Go to following link:
Spring initializr
Choose "Web" for "Selected Dependencise" and click "Generate Project". Download of maven project should start after that. Then import that project in IntelliJ IDEA as a Maven project. And that is a good starting point. You'll get main class that you can run and embeded Tomcat will start at 8080 port. Than you can add some controller, template etc...
Also good guides
I am working on bringing up a new team in the Spring Boot ecosystem. I love the Spring Initializr service. We have written custom Gradle plugins for unifying our build systems across many Spring Boot projects. I am looking to provide our team with an Initializr that will take advantage of our build tooling as well as inject some of our business practices into the scaffolding of the project.
With these goals in mind we have decided that extending the wonderful Spring Initializr and running a custom instance locally makes a lot of sense.
Unfortunately, it appears that the Initializr project has very little documentation about customizing it, beyond the basics of editing the YAML configuration and the Templates for the java files, it is difficult (for someone with no Groovy Templating experience) to figure out how to best extend the Initializr such that we maintain much of the functionality but can also extend the site and service appropriately.
We have built the github project from source, and published the artifacts to our local artifactory, and have successfully created our own project that uses those artifacts as a dependency and stands up a mildly customized service (basic HTML and Java source editing, simple YAML configuration).
Can anyone help with even basic resources for extending the functionality of the Initializr? perhaps a roadmap? a project specific forum? really any help is appreciated, my google-foo seems to be failing me.
I know this is a reasonably broad question, but I am failing to get in touch with the right people, or find the resources for this.
So the answer is indeed Gitter. Spring Initializr should be seen at the moment as a service and not a library. We do our best to make sure things are nicely separated but that's not the case yet for everything (read: designed for extension).
We have some plans to allow external components to customize how the project is generated. It would help if you could share your use cases on the gitter channel. Thanks!
I m very new in spring batch project.I m trying to create a project in spring batch framework but i don't know how to create a project in spring batch framework,so please help me regarding my problem.Firstly just tell me that how i create a simple "hello world" program using Simple Spring Batch Project in spring source tools suits using maven.
Thanks in advance.
From the documentation, it looks like there is no real maven archetypes to build the skeleton of a spring batch projet.
The documentation recommends anyway to copy samples and examples from their website to start from.
http://static.springsource.org/spring-batch/getting-started.html
Spring Batch is not trivial for the first time, then I recommend you to copy this code:
https://github.com/spring-projects/spring-batch/tree/master/spring-batch-samples
Then, using Eclipse open this (Maven project) and compile (mvn clean install)
Last thing (if all works ok) just run the main method, usually o Scheduler task.