I am writing a SpringBoot application for an e-commerce website project where I’m creating a form to change the current password of the user account. I am getting the following two errors when the form gets submitted. ERROR-1 ERROR-2 HomeController myprofile.html User Class User Service User Service Imp…
Tag: spring-boot
KafkaException: class is not an instance of org.apache.kafka.common.serialization.Deserializer
I want to implement Kafka producer which sends and receives Java Serialized Objects. I tried this: Producer: } Send object: Consumer: // Receive Object When I deploy the Producer I get error during deployment: Caused by: org.apache.kafka.common.KafkaException: class org.engine.plugin.transactions.factory.Sale…
Spring Boot :Deleting a blog posts shared tag only when the last post that has it is deleted
I have a dilemma trying to get a solution for this issue. I have two (can be any number) blog posts that share the same tag. I have a set of tags for each added post so duplicate tags are not possible, so lets say I add first post with the tags “car” and “blue” and the second post with
How to not persist sqlSession.selectOne returned value?
My goal is to not persist the SqlSession.selectOne returned value. The problem is, if you do a sqlSession.selectOne (using an API endpoint) and then you edit the database directly for example using the MySQL workbench. After you edit the database and do another API endpoint request, the returned value will no…
How to join several validation annotations
I have following annotation to validate password: But spring validation does not recognize this rules. I used this annotation as: How can I get it without defining ConstraintValidator instance? Answer If you want to use ConstraintValidator, you can do it like this: create Password annotation : then create the…
How to Map a JPA create native query to projections
I am trying to get count from a postgreSQL database using Spring Data JPA createNativeQuery. However, the query is returning null instead of the actual values. Here is the JPA createNativeQuery statement below: I need help mapping the “submitted”, “pending” and “totalApplications…
is there anyway to connect spring boot with tcps to database?
I’m using oracle database 12c and spring boot 2.3 with data JPA. My goal is to connect with the wallet throw TCPS to the database. There is no example or guides for this on the net as I searched. Can anyone explain and show some examples for this? Answer How to connect to Oracle from Java? Commonly, in …
Vaadin cannot import CSS file
So I’m new to Vaadin and all that stuff and I’m currently trying to integrate a CSS-File to my site. When I try to do this though, I get an error after trying to run the gradle-Project: So obviously the Path to the CSS-File is wrong, but I don’t know where to “start” the path. So…
Custom AOP spring boot annotation with ribbon client blocking api call with return “1”
I have really poor experience with ribbon/eureka so forgive me if this is a stupid question: I have two different microservice both connected to a discovery server, the first one calls the second …
Spring Boot Application Shutting Down as soon as it’s started
I used Spring Initializr to initialize a new project. I further added MySQL Driver, Spring Data JPA, Spring Boot Actuator, and Spring Web as project dependencies. Exporting the .zip file, the only thing I did is, changed the application.properties file. When I run the application, it starts and stops immediat…