playframework | Play Framework | Reactive Programming library

When running sbt new playframework/play-scala-seed.g8 compiling and running from terminal everything works perfectly well. But when importing the project to IntelliJ, Adding a "Play 2 App" configuration, and running it, the program runs perfectly but stops immediately. Also, The play logo is shown twice.

I'm trying to start working with play framework. I tried using the "hello world" example for Java, but after running the "sbt run" command I get errors. I get a lot of lines in the CMD, with the last few lines being:

i hope someone can help me. I use following Code snippet to upload an image to my server (This is copied from here: https://www.playframework.com/documentation/2.8.x/ScalaFileUpload

Context: I'm trying to run the starter sample web application in the Play documentation for Scala: https://www.playframework.com/documentation/2.8.x/HelloWorldTutorial. I confirmed that I have the listed requirements and I've followed the instructions in the README which appear to state you run sbt run in the project directory. I'm raising a ton of errors which seem to indicate I have missing dependencies but I have no idea.

Questions: Can someone please assist in helping me interpret and resolve these errors? Thank you.

I do want to write some functional tests for our project. Techstack: Play Framework 1.5, Java 16, Junit 3.

I found following documentation: test - 1.5.x security - 1.5.x

So the Controller looks something like this.

Recently I switched my Play Framework-based project from Ehcache to Caffeine, because the Play documentation for version 2.8 says "For in-process caching Caffeine is typically the best choice."

Now, I implemented a little "test" to see how many items can be added to the cache before some items are evicted. The test simply adds more and more items to the cache (without an explicit expiration) in a loop, checking whether all previosuly inserted items still are available after each insert operation, until at least one previously inserted item is detected to be missing.

With Ehcache I found that the limit apparently is 10,000 items. After adding that many items to the cache, some "old" items start to disappear from the cache. So my conclusion is that Ehcache, by default, has a fixed size limit of 10,000 items. With Caffeine, on the other hand, there seems to be no limit at all! I kept the test running for a very long time, but even after inserting ~1 million items, still no previously inserted items had been evicted. At that point I stopped the test.

So, does Caffeine, unlike Ehcache, not have a size limit by default? Will it keep on accumulating items until, eventually, my application crashes with "out of memory" error, or is there some logic in Caffeine that evicts items in "low memory" situations? Is it advisable to configure an explicit cache size limit when using Caffeine? I would think so. But then, why Play doesn't do it by default?

Unfortuantely, the Cache documentation of Play Framework doesn't make clear at all which default settings Play uses with Ehcache and/or Caffeine. Also, a list of available Cache options in the Play configuration (and the respecitive default values) would be really helpful...

Regards.

I'm trying to learn Play for scala and though they provide some nice example projects, I can't get any of them to run. Specifically the rest api example https://github.com/playframework/play-samples/tree/2.7.x/play-scala-rest-api-example Supposedly you can just download the sample and run sbt run. The project builds for me just fine, but when I navigate to the url, localhost:9000 for the project I get error:

My .scalafmt.conf file has the following:

I am attempting to create the PlayFramework Scala seed project.

So far I've used sbt new playframework/play-scala-seed.g8 command and it has created the necessary files within my root directory movie-app.

From this point, PlayFramework says to run sbt run, so I tried that, but I get the following error: