Java Transactions

Not very popular (today by base/saga/acid tx context) the transaction-type that exist in Java (JTA)
 
- NotSupported
- Supports
- Required
- RequiresNew
- Mandatory
- Never

For more details :

https://docs.oracle.com/javaee/6/api/javax/ejb/TransactionAttributeType.html#REQUIRES_NEWhttps://docs.oracle.com/cd/A91202_01/901_doc/java.901/a90188/trans.htm#1271312
https://docs.oracle.com/javaee/5/tutorial/doc/bncij.html
https://docs.spring.io/spring/docs/4.3.18.RELEASE/spring-framework-reference/html/transaction.html 
https://stackoverflow.com/questions/10740021/transactionalpropagation-propagation-required
https://docs.oracle.com/cd/E13222_01/wls/docs92/jta/trxejb.html#wp1008419

Log4j2 Architecture

https://logging.apache.org/log4j/2.0/manual/architecture.html

https://logging.apache.org/log4j/2.0/faq.html

Software Architecture Diagram Review Checklist

Simon Brown's C4 is a great visual architecture model http://c4model.com/

In the same site you can find resources about its solution, including a Software Architecture Diagram Review Checklist: