Category "java"

Spring Boot Multitenant - Access data from multiple schema at the same time or per http request using spring boot

We are working on the multitenant application in spring boot. We have created different schema for different customer and we also have public scheme for super a

Which openssl keypair gen command produces a password-less private key that I can read in Java 17?

Burned better part of a day on this. Google says use PKCS#8 format for the private key, so I issued command (alpine openssl 1.1.1o) $ openssl genpkey -out my.p

Converting a mono object into two different mono object and the root mono is executing two times

Suppose I have create a Student entity and storing it into database using reactive. Student student{ id; name; institutionId; courseId; } I

Build complex PDF in kotlin [closed]

I want to create "complex" (footer, header, cells and pictures) pdf for my android application (kotlin). I've seen some people already asked f

How to pass hbase-site.xml to Google Cloud Dataflow template

We have a setup where we have a Hbase cluster running on Google cloud and using Dataflow I want to write into Hbase tables. For this, I want to pass my hbase-si

How to add a Lottie animation in Java programatically

I tried to add Lottie Animation to Java (Android) programmatically, but I keep failing. I will show my code below I need to change from drawable to Lottie. This

How to check if token expired in java?

I have user which have: id, username,password, tokenExpires which is Date. When i generate token i generate a string, how to check if token is not expired?

Difference between Static methods and Instance methods

I was just reading over the text given to me in my textbook and I'm not really sure I understand what it is saying. It's basically telling me that static method

How can i call cpprofiler in choco-solver for contrainst programming profiling

I found this on choco-solver documentation but i do not know how use it with provided choco-solver sample program in order to profile. NB: I already install cpp

org.hibernate.internal.ExceptionMapperStandardImpl.mapManagedFlushFailure HHH000346: Error during managed flush

I have a server mistake: > ERROR [http-nio-8080-exec-5] > org.hibernate.internal.ExceptionMapperStandardImpl.mapManagedFlushFailure > HHH000346: Error

Spring RequestBody with either List<Object> or Object. Name for both are same "data"

I want to handle json request for List of Object and Object it self in the same Spring controller. Below is the exact example. Json Request for Single Object:

Java get generic type of static method at runtime

So I was reading through the source code of Collections.java, there is a generic method copy(). I simplified it to this: public static <T> void copy(List&

Scanner is skipping nextLine() after using next() or nextFoo()?

I am using the Scanner methods nextInt() and nextLine() for reading input. It looks like this: System.out.println("Enter numerical value"); int option; o

Find the max value of the same length nails after hammered

I'm trying to solve this problem: Given an array of positive integers, and an integer Y, you are allowed to replace at most Y array-elements with lesser val

Bukkit - Change block on click (client side)

What I'm trying to do is to replace a block into a diamond block on client side when a player right clicks it public class setBlock implements Listener { @E

Is it possible to use data.sql without schema.sql

I want to initialise schema using spring.jpa.generate-ddl=true and then populate using data.sql. I tried it but it doesn't seem to work without schema.sql. Any

package javax.servlet does not exist | package jakarta.servlet does not exist

javac -classpath "/opt/tomcat/lib/servlet-api.jar" /opt/tomcat/webapps/ROOT/WEB-INF/classes/NewServlet.java I have tried replacing the javax.servlet with "jaka

Accessing json value using jsonpath?

I'm following the tutorial for using jsonpath (https://www.baeldung.com/guide-to-jayway-jsonpath) and using the endpoint https://api.binance.com/api/v3/exchange

How to export backup of Cloud SQL database in Google Storage?

I have a GAE project and for that to store the data i have used Cloud SQL database. I need to take on demand backup of my Cloud SQL database and the backup sho

Query through all provided schemas

I have kind of 'restaurant app' with multi tenant architecture. Each Tenant in short words have their Order table where I keep all data regarding orders which w