I am trying to write a client for my server (both in Kotlin and using Spring Reactive Web). I encountered this problem while trying to use the RSocket. How can I get a Flux using RSocket? Answer You need to get reference of Class. You can use either Int::class.java or Int::class depending whether you need jav…
Tag: spring
Getting error to import Spring boot parent into Pom.xml
I am trying to create a sample Spring-Boot project using maven but when i imported into Eclipse. I am getting an error in Pom.xml about spring-boot parent but when i run mvn command from terminal. It works fine. Also, in main class, it does not recognize org.springframework.* I am getting an error which says …
endless hibernate query in thymeleaf for classes @OneToMeny and @ManyToOne
everybody, I’ve built myself two classes that are circulating. additive class @Entity @Table(name = “additive”, schema = “dbo”) @Data @NoArgsConstructor public class Additive{ @Id @…
cannot resolve this error: unable to insert NULL in (“NAWFEL”. “ORDO_DEP_UUSATEUR”. “EMPLOI”)
I’m developing a user registration form, the problem I get is that when I want to test my web service in postman it shows me the following error in my eclipse console: he tells me that I cannot insert a null value in the job “emploi” column, but I entered the value of the job column in my po…
Trusted SSL certificate showing as self signed
I have a trusted TLS certificate deliverd by DigiCert that I’m trying to use in a java/spring application exposing rest apis. I created a .p12 file with openssl doing the following : openssl pkcs12 -export -in mycertificate.cer -certfile mycertificate_INTERMEDIATE.cer -inkey myprivate_key.key -out myCer…
JPA cascade actions on one-to-one relationship
I have the following question regarding one to one relationships (and I guess one to many also): Let’s suppose I have the following tables: As you can see the two tables share the same primary key. Now the entities I created are the following: When I try to persist a new user I have a user object with a…
What is Querydsl PathBuilder String parameter ‘variable’ used for
I’m working with Querydsl in my Spring Boot API for making some complex data filtering and when i declare the PathBuilder variable i’ve seen that first you have to pass statically your class like YourClass.class and then a string variable for the constructor as shown below: So i was wondering why …
Error starting ApplicationContext in Spring when add @OneToOne Annotation
: I am a beginner in Java Spring MVC and I want to create a simple program using spring boots. But I have a problem: When I add @OneToOne and @JoinColumn to my model class, the project doesn’t start! Error: Error starting ApplicationContext. To display the conditions report re-run your application with …
How can i add data to th:action form
I have a spring-boot application. Full url that I need: localhost:8080/company/{companyName}/users?name={name}. In the beginning i choose company, for ex. : localhost:8080/company/google. The controller redirects me to the page with the form (company.html), where i type name. Controller: In Data class i simpl…
SpringBoot DTO Validation
I am new to spring-boot I’m trying to add validation to my DTO class like below. Below is my REST endpoint to save employee. I create a Validation class like below to validate the DTO fields. expected output is { “firstName”:”Employee first name is required”, “employeeNum&#…