Chapter 7

1. At the time of writing, there are eight implementations of Eclipse MicroProfile, all of which are open source. They are Thorntail, Open Liberty, Apache TomEE, Payara Micro, Hammock, KumuluzEE, Launcher, and Helidon. There is also Quarkus as the latest entrant.
2. An application server is a container for Java EE applications. An application assembler only includes the functionality that the application needs, instead of requiring an application server to be up and running, and commonly generates an executable JAR. An application assembler can generate an uberjar, a self-contained runnable JAR file, or an application jar with its runtime dependencies located in a sub-directory, for example, an accompanying lib or libs sub-directory.
3. Here is a short description of the current eight MicroProfile implementations on the market:
   1. Red Hat are the sponsors of the open source Thorntail...