Is my class a bean?
For almost every Java class that we as developers have ever written, the answer would be yes, most definitely, as long as the Java class has either a constructor with no parameters or a constructor that is annotated with @Inject.
There is only one requirement that CDI mandates for a Java class to be injected as a bean, and that's for the Java class to be packaged into an appropriate archive (such as a JAR or WAR) that contains a descriptor file called beans.xml. This descriptor file needs to be present in the META-INF folder of a JAR or the WEB-INF folder of a WAR.
It's perfectly fine for beans.xml to be completely empty or only contain the following XML content:
<beans xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ...
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