java mail and TLS

article

check mail.smtp.ssl.socketFactory here


hMailServer
SSL certificates
public key is expected to be in PEM format
see here
private key must be with stripped out passphrase, i.e. without a passphrase
I used BIS to export PK without a passphrase

For Debug:

-Djava.security.debug=certpath

-Djavax.net.debug=trustmanager


JavaMail API Design Specification 1.6

Java Mail API doc

Microservices

Microservices pattern

https://martinfowler.com/articles/microservices.html

Oracle 12c Upgrade from 21.1.0.2 to 12.2

Article

https://docs.oracle.com/database/122/UPGRD/behavior-change-deprecate-desupport-oracle-12c-rel-2.htm#UPGRD60000

Clearing recycle bean

PURGE DBA_RECYCLEBIN;

for each PDB as well.