Have SpringBoot Java app with different classes. I am not able to inject the dependencies and initialize/access the object of one class into another . Have seen the spring doc and used the annotations (@component,@Autowired etc. ), still there is an issue. following are the classes. Main Class () Controller c…
Tag: spring-boot
Spring Boot merge configuration properties
I’ve a use case where I need to bind configuration properties based on two prefixes, one of which is determined at runtime. Let’s say the constant prefix is foo and the runtime prefix is bar. Given a new instance of Java Bean class FooBar, the code should bind all environment variables FOO_, then …
Spring Boot @Schedular not running after first execution
I have written this scheduled task in my SpringBoot app: This runs first time, but not subsequently. Answer It turned out that I was running another “heavy” scheduled task in the same application (it was initially created for testing my business logic and then I forgot to remove that). When I remo…
How can I specify the second parameter in ObjectMapper based on a variable in Java?
I have a use case where I am consuming from multiple topics and based on the topic I have to create an object from a String. I have around 25 topics leading to 25 kinds of objects. So, instead of using a bunch of if-else, I want to use a map where the key will be the topic name. So,
Spring AOP @Pointcut and @Before yields IllegalArgumentException: error at ::0 formal unbound in pointcut
I am doing a springboot project that includes login and accounts. I am trying to @Pointcut all controller method calls and validate the login information, and @Before the pointcut to make sure the session exists. Hence the code: However, this yields org.springframework.beans.factory.BeanCreationException: Err…
Issues with CORS preflight Spring/React, reading from authorized/admin endpoint
Im new to both Java (spring) and React and the most issues I seem to get is by the annoying CORS. I did have same CORS issues before and by looking online I found serveral solutions, but mainly the answers were directing to the back-end, that’s where you need to allow certain domains. So I added first @…
Is it known you shouldn’t name methods starting with ‘get’ when using @ConfigurationProperties on a Spring @Component
Suppose a simple Spring Boot @Component like this one: It will not start throwing ConfigurationPropertiesBindException: Error creating bean with name ‘demoClass’: Could not bind properties to ‘DemoClass’ All you need to fix is a getSomething method name. Just rename it to putSomething …
Is there a way to shorten boolean RequestParams in Spring Boot?
Thanks for all trying to help 🙂 Backround information: I use the spring framework version 2.4.3 together with Java (and Maven) To my question: Is it possible to shorten http://localhost:8080/api/v1/example?admin=true&superPrivilege=true to something like http://localhost:8080/api/v1/example?admin&supe…
I can’t understand casting interface to children that don’t have any parents
I am studying lambda and then WebClient Class so I am creating bean of WebClient I think top codes and bottom codes are the same I don’t understand this cast situation because HttpMessageWriter is interface and LoggingCodecSupport is class but LoggingCodecSupport doesn’t implement HttpMessageWrite…
JPA : Re-use Id generated from a sequence for a new version of the same object having composite PK (ID + VERSION)
I have entity A with composite PK [ id(generated from sequence) + version ]. For a brand new record I want to pick the id from a sequence defined in the DB side. Lets say its created like below Next time, I want a new version of the same Id to be created like below Note : in the second