Ask questions and see you at May, 3rd, 8.PM. CET: https://vimeo.com/event/154379
Also checkout recent episode:
Please keep the questions Jakarta EE-stic. Means: as short and as concise as only possible. Feel free to ask several, shorter questions. Upcoming airhacks.tv events are also going to be announced at meetup.com/airhacks
I'm wondering if this construction on an EJB method makes sense.
@Asynchronous
@TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
pubic void mymethod() {
..
}
Does @asynchronous already imply a new transaction?
What do you think of gradle? Why do you only use maven?
Is it possible to create a JTA transaction in a servlet and pass that on somehow to an EJB so the EJB will use the transaction created in the servlet? Could you show how to do that?
Hi Adam. My question is about web development. In workshops, you use all the most modern features of javascript and css. How do you solve the problem if the user's web browser does not support all modern features?
Hi Adam!
Could you make a video showing a simple pipeline for deploying a front end and backend app to a test environment and then production?
Perhaps this could be video you could include in one of your online video courses:)
There is also a question about configuring the frontend application. Where to save, for example, url's of rest services? How do you organize front-end application configuration? In additional tutorial on migrating from redax to redax-toolkit, you used a file init.js to set an environment variable. I think it is possible to place other tuning parameters in the same place, right?
What web server do you use for front-end applications? Please recommend. During development you use the browser-sync, but in production?
Hello Adam,
first of all: great show, really enjoy your pragmatic view on things and the shared insights.
for your "First Monday of the Month Bug" disclosed in airhacks #84: The JDK got your back and can help you out on this one:
var firstMondayOfTheMonth = now.with(TemporalAdjusters.firstInMonth(DayOfWeek.MONDAY)))
Even saves you a line of code and is always right.
Btw, it is not really a "now" if the var is assigned a now().plusMonths(1) ... ;- )
In airhacks #81 (yes, rather late feedback) frequent questioneer @thehpi was asking in the very last question of that show
I want to be able to configure for a user how many request per second he can fire onto my server
and you suggested MP's Bulkhead. I understood the question slightly different and thought he might be looking for a "per user" mechanism, not how many concurrent requests across all users (?). How would you implement this? Via Interceptor involving i.e. bucket4j?
Thanks in advance. Greetings from and to Munich.
Hello Adam,
What is your view on the software development process? do you use UML? are use-cases and sequence diagrams still relevant? what are the required documents for a good software development practice?
thank you.
Hello Adam,
one more topic: What would be your preferred way to deploy an application as in "webcomponents-with-redux.training"? Would you deploy frontend and backend seperately? If so, how would you serve the frontend? Just serve it from a plain nginx Docker container?
Given there is a only a small number of developers who are all fullstack and FE + BE don't get developed seperately, how about a single deployment unit, rolling-up the FE into the static assets/resources of the Quarkus "backend"?
Curious about your suggestions.
Question from the screencast "Testing ServiceWorkers on iPhone and Quarkus" / https://youtu.be/ljSQXfc-GkA
"Hey Adam, I don't know if you read your comment or not but how about a guide about the following:
When building a JakartaEE App you have to define a jaxrs resources path using @ApplicationPath but using Quarkus you don't need this.
It's a topic worth covering because when you do @ApplicationPath("/") the path interference with the WebApp folder. It's an interesting use case for e.g. Server Side Rendered Apps using JaxRs endpoints as "pages"
Hi Adam!
Do you have any recommendations for programming books? Preferably geared towards architecture, design principles, tips and tricks.
I was also considering buying one of your books, but I see they are from 2012. Would you say the content is still relevant? :)
https://www.amazon.com/Real-World-Java-Patterns-Rethinking-Practices-ebook/dp/B009ZQ9I62/
Best regards Frank
Hi Adam,
What is the simplest JavaEE'stic way to build a real-time bidding system?
A stream of prices flow and you should act for each price in order in a certain time frame.
Before going to a Message Queue system, can we solve with Java concurrency classes?
Best regards,
Ahmet
I use the @schedule to schedule jobs which is very convenient.
Every now and then however the job fails which is accepted but when it fails twice it shuts down completely.
Is there a way to disable this behaviour or configure it to a higher value.
I know the solution would be to catch the exception and let it not fail but I don't have control over this class.
Hi Adam,
in JavaScript:
// in file: car.js
export default class Car {
constructor(name, year) {
this.name = name;
this.year = year;
}
}
// in some other js-file
import './car.js'
// some logic
const car = Car("Hey Car", 2021);
// store in Redux
dispatch({
"action": "CAR_CREATED",
"payload": car
});When would you prefer one over the other? Which approach do you suggest?
Thank you,
Wassim
Hi Adam,
when one js-module (e.g. common-module.js) is imported in multiple different js-modules, is the code inside the common-module.js executed multiple times? Or is the module like static-code block in Java?
Thank you,
Wassim
I use the @schedule to schedule jobs which is very convenient.
Every now and then however the job fails which is accepted but when it fails twice it shuts down completely.Is there a way to disable this behaviour or configure it to a higher value.
I know the solution would be to catch the exception and let it not fail but I don't have control over this class.
I also ran into a similar problem in openliberty.
I have an JPA Entity with bean validation on it so it produces a ValidationConstraintException when something is wrong.
I have an EJB which does the entity handling and a REST api which calls the EJB.
When there is a validation issue I get the ValidationConstraintException wrapped in a RollbackException wrapped in a EJBException.
So I want to prevent wrapping. It can be done using the @applicationexception on my own exceptions but in the example above I cannot apply the annotation. I can also use the ejb-jar.xml to set the and I tried but this also seems to work only on my own exceptions which are defined in the EJB.
Is there a way to tell the system to not wrap the ValidationConstraintException?
I'm using payara btw