project-loom-c5m VS soapui

It is not. Blocking IO (with some exceptions mentioned in the JEP) will automatically be translated by the runtime into non-blocking IO when it occurs on virtual threads, and no OS threads will be blocked. You can have a million threads blocking on a million sockets (obviously without creating a million OS threads): https://github.com/ebarlas/project-loom-c5m

You can't do that with thread pools. You could achieve that scalability with async code, but then observability tools will not be able to track the IO operations and who initiated them, but with virtual threads you'll see exactly what business operation is doing what IO and why.

That might change in JDK 21 (with virtual threads). See this https://github.com/ebarlas/project-loom-c5m . It achieve 5 million persistent connections (again depends on the server capacity and kernal tuning) using normal simple blocking code (https://github.com/ebarlas/project-loom-c5m/blob/main/src/main/java/loomtest/EchoServer.java) . It's a far better better programming model compared to JS async/await.

Let's first try the service manually. We will use the SoapUI testing tool. After importing the WSDL, test requests are automatically created. There are two versions of the "SOAP binding" imported from the WSDL. We will use the newer one, SOAP 1.2. We just need to substitute the input number in the place of a question mark and we can invoke the web service:

SoapUI

There are plenty of tools for stress testing, read RapidAPI, paw, SoapUI, Postman, rest-assured, JMeter and so on! I'm sure they are amazing, however that's all big and heavy, slow, sometimes paid tools!

SoapUI: https://www.soapui.org/

SoapUI from SmartBear is a popular tool that gives you a great graphical UI for navigating through a WSDL. Popping open any operation gives you a sample request that you can fill in and execute from within their app:

I found SoapUI when I had to develop some SOAP services, but these days it also does REST etc just fine.

For someone like me who just does this occasionally I found it rather useful.

[1]: https://www.soapui.org

Eclipse IDE (IntelliJ when I have to depending on the team) (oh and I use the Eclipse package download site, not the installer) Bash shell (WSL on Windows) Gnu CLI commands Dbeaver (although I tend to use the version in the repos) MySQL Workbench (although I tend to use the version in the repos) Meld (like it better than any other comparison tool for ad hoc visual file compares) Apache JMeter (performance testing) (I tend to download and run manually instead of the one in the repos) GIMP Wireshark (great for figuring out why someone's fancy REST client isn't passing JSON correctly) SoapUI (or Postman depending on the team, I prefer SoapUI - which does REST)

SOAP