🍃🎓 SPRING CERTIFICATION QUESTION: When does the JDBC template acquire (and release) a connection 🔌 - for every method called or once per template?

Answer:

𝐉𝐝𝐛𝐜𝐓𝐞𝐦𝐩𝐥𝐚𝐭𝐞 acquires and releases connection of each called method.

𝐉𝐝𝐛𝐜𝐓𝐞𝐦𝐩𝐥𝐚𝐭𝐞 source code confirms that (look at 𝐉𝐝𝐛𝐜𝐓𝐞𝐦𝐩𝐥𝐚𝐭𝐞#𝐞𝐱𝐞𝐜𝐮𝐭𝐞 ).

This connection acquiring/releasing strategy is used to minimize connection holding time allowing other clients to utilize free connections.

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🧑‍💻 JdbcTemplate source code 👉 https://github.com/spring-projects/spring-framework/blob/main/spring-jdbc/src/main/java/org/springframework/jdbc/core/JdbcTemplate.java