There is a database connection pool in Traccar.
Thank you for your answer, but I still feel hard to read the code, can you talk about what tech stack you choose and why you choose them, would you like to analyse and explain the struct and function of the code, thank you!
If you want to understand the code I would recommend to read Netty documentation.
I read the source code, I found there is no hibernate framework, directly JDBC coding, so I wanna know if there is the DatabaseConnectionPool tech in the source code? thank you!