vavr | formerly called Javaslang | Functional Programming library

It depends a bit on the behaviour you'd like to achieve. If you only want to get the failed validation for the first category in the list, which seems to be the case, you could use Either.traverseRight and then convert that to a validation. The traverseRight will only keep the first failed entry or the list of succesful things.

So the code could look like this:

See if this sample helps you somehow:

https://github.com/spring-projects/spring-amqp-samples/tree/main/spring-rabbit-json

The docs is here: https://docs.spring.io/spring-amqp/docs/current/reference/html/#json-message-converter

UPDATE

See what would be a difference if you use this option on the converter:

Thanks for the Github page, it helped a lot! After skimming through the web page you sent me, I found the solution. Actually, in the library systems.manifold, the annotations you mentioned are not present. Add another implementation named manifold-science or manifold-ext like this,

It was missing the key part of :

Don’t talk about caches when it comes to Java’s memory model. What matters, are formal happens-before relationships.

Note that computeValue() is declared synchronized, so for threads executing the method, reorderings within the method are irrelevant, as they can only enter the method when any thread which executed the method before, has exited the method and there is a happens-before relationship between the method exit of the previous threads and the next thread entering the method.

The really interesting method is

You can easily serialize/deserialize vavr objects to/from JSON with jackson. What you need to do is to register VavrModule on the instance of the ObjectMapper:

It seems you are making this a little more complicated than necessary. The problem is that you have two opposing arcs for every vertex pair. As such, indeed a DepthFirstIterator will iterate over all vertices that are reachable from the vertex on which you start the iterator. I would propose the following changes.

1. Create a Graph org= new SimpleDirectedGraph(DefaultEdge.class)
2. Populate your graph with all the Employees. Add arcs to the graph, where an arc (v1,v2) between two employees v1 and v2 implies that v1 supervices v2. In other words, we only add the isBossOf arcs; we do not add the reportsTo arcs.

To determine for a given employee who he/she supervices, or to whom he/she reports, we can write two simple functions.

To get the list of employees that are superviced by a given supervices:

So after a lot of debugging, the problem here lies in spring security. If you have a class that extends WebSecurityConfigurerAdapter, spring will automatically attempt to use apply it to the embedded tomcat web server. Which is not supported on google app engine, which broke it. Just remove the class and the app will work.

Here is one way to do it: