I’ve created table with 8 columns: In fact each column (tag “td”) should serve as a button and after clicking send me to controller (@PostMapping or @GetMapping), where I will try to read th:value. How to make it? Instead of th:attr=”action=@{/}” I’ve tried to use th:href=&…
Tag: spring-boot
using the Hazelcast distributed locks with Coroutines in Kotlin and Spring webflux
My question is as the documentation says, fencedlocks are reentrant locks for “THREADS” and I am using spring boot with Kotlin and webflux so in my application I am using Coroutines for concurrency and as you probably know spring webflux provides an event-loop with a limited number of threads to fulfilling th…
Multiple nested exceptions while trying to consume JSON documents from API’s
I’ve created a simple Spring Boot app, in which I am trying to consume an API through JSON information. Below you can see the simple code I created using RestTemplate on the Service Class. The problem I am facing is that when I am using the API url below, I am getting the following nested exception. In …
Avoid duplication on manyToMany relationships with 3 tables
I’m trying to implement a User system with roles and privileges. So I have 5 tables: users roles privileges users_roles roles_privileges My class user owns the relationship users_roles and the class roles owns the relationship roles_privileges. To describe my problem lets say I have the following in my …
Design pattern for Java Spring data JPA projects [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 9 months ago. Improve this question This is my current project design Controller-> service -> Repositor…
Jax-rs annotation Path is not work in java spring boot?
I have spring boot application with starter version 2.1.16, and spring-boot-starter-web dependency. So, i want use javax.ws.rs-api library, and add dependency: So when i create controller, and add @Path, @Get – i don’t get answer from the server (404 not found). How makes it work? Answer Add the f…
Spring upgrade issue – ClassNotFoundException
I have upgraded my spring boot from 2.2.6.RELEASE to 2.7.0. After the upgrade , i am getting ClassNotFoundException when i start the application. I tried with 2.6.6 but result is same. My pom file looks like Exception : Can anyone please help on this? Answer Finally i could solve the issue. In the parent pom …
Drools KieContainer does not fire rules with custom classloader
I am trying to add a non-existing method to a Java bean, compile it and use the newly added method in Drools rules. Via a custom class loader. I am using CompilerUtils to bind newly modified class to the custom ClassLoader as follows: And this is where I give access to drools my classloader This is how I fire…
registration form is not submitting in spring boot and not hitting endpoints
I’m working on a registration form in Spring Boot and thymeleaf but it’s not submitting to the database. I even run the debugger mood and it did not hit the endpoints for the registration. Note, that my login and other functionalities work fine. I’m following this here to create my registrat…
Reasons why a JAR on classpath not loaded
I have a SpringBoot application that is run with the command java -classpath <longlist of JARs> com.example.MyApp. I have the path to a JAR – in this case liquibase-core-4.4.0.jar – specified on the classpath. However, on startup the app complains about missing class definitions. Attaching a…