I am trying to loadtest a simple request/reply scenario over a rabbitmq broker. This scenario sends a simple text message to the defined queue and then wait on the defined replyQueue for an answer. On the other side of the request queue is simple message listener that reads the JMSReplyTo field and sends a message to that destination. In the
SelfMutate stage failing with CodePipeline
I’m trying to create a CI/CD using CDK pipeline with the import software.amazon.awscdk.pipelines.CodePipeline in Java. This pipeline creates another stack named xxxJavaxxxStack. The pipeline is able to connect to external github, which, when change is detected, triggers the pipeline. In the class xxxPipelinexxxApp.java I’m calling both the stacks xxxJavaxxxStack and xxxPipelinexxxStack. I have successfully been able to cdk synth both
Store and retrieve an object in session through @Scope(“session”)
I am having a Spring shopping project and I am working on a cart with I can add new product to it and store it in the session. I create a Cart class to store it in the session I create a Controller class to get the cart from session and add product to it But when I call this
Which import should be considered?
Consider the following code snippet. This code compiles well with Java 11 even though I thought it should not. Observable is also a java class in java.util and I do not understand how the compiler knows whether to use Observable from java.util or my custom package rx. Note that java.util.Observable was deprecated in Java 9, however, I don’t think so
Log4j ThreadContext.clear() not available with auto-complete?
according to the Log4j documentation I can call ThreadContext.clear(); but in my IDE I do not get clear() as an available method and I also get compilation errors, I only see clearAll(), etc., why? What is missing on the classpath? Log4j Version 2.16.0 is used. Answer As per https://svn.apache.org/viewvc?view=revision&revision=1594389, the clear() method is replaced with clearMap() (it was already deprecated
Java Generics – Type must be from Class T “or” extend S
I am developing a ComboBox (more for context than actual significance), and I would like to know if the “or” operator exists in Java generics. For now, the declaration looks something like that: Where ComboBoxItem is an interface I created for items that can be used in the ComboBox. However, I’d also like to accept String as a type, which
When to use Functional Interface vs Function
I am using Java 11, and we have two ways of passing in functions as an argument. functional interface Function<T, Y> Now I am not able to find anything on when to use which one. I can figure that we can use a generic functional interface over a Function<T,Y> when we either don’t want to pass any arguments or have
Use Class as a method signature
In the method signature, I need a parameter that is any class type that extends from Collection (List, Set, etc), so I can return any of them. To try to achieve this I did use the following method: However when I try to use it like: The following error arises: I did search for an answer already solved in Stackoverflow,
maven repository with BigQuery Simba JDBC Connector
I’m starting new backend application that will operate on BigQuery. Would love to check Simba JDBC Connector, but my main blocker is no Maven repository with it. It complicates startup significantly. …
Does a response containing multiple json Values always have to be wrapped in an array in java?
I am trying to return a response from the back end using java where the response is a list of json values. Is it possible to return the data in this format? I noticed that json values are always returned wrapped in an array like this I was asked to return the json data without being in an array and