https://docs.jboss.org/jbossas/6/JSF_Guide/en-US/html/jsf.reference.html
https://docs.jboss.org/weld/reference/3.0.0.Final/en-US/html_single/
https://docs.oracle.com/javaee/7/tutorial/jsf-configure002.htm
https://www.javacodegeeks.com/2013/04/java-ee-cdi-bean-scopes.html