[rocketraman]

What

Two new driver modules, alongside boot-db-jdbc-sqlite:

• boot-db-jdbc-postgresql: PostgresqlConfig (host, port, database, credentials, plus typed currentSchema, applicationName, sslMode, connectTimeout, socketTimeout, reWriteBatchedInserts), postgresqlConfigModule (Kodein), PostgresqlConfigBindings (Metro).
• boot-db-jdbc-mysql: MysqlConfig (host, port, database, credentials, plus typed sslMode, allowPublicKeyRetrieval, connectTimeout, socketTimeout, rewriteBatchedStatements, prepared statement cache), mysqlConfigModule (Kodein), MysqlConfigBindings (Metro).

Both decode from db.jdbc, like the SQLite module.

Design notes

• Typed settings go to the driver as connection properties. Settings left null keep the driver's default, and there's no free-form properties map. For addresses this can't express (e.g. multi-host failover), the KDoc points to JdbcGenericConfig.
• MySQL's one opinionated default: Connector/J's prepared statement cache is on (cachePrepStmts, 250 statements, 2048-char limit), as HikariCP recommends. PostgreSQL keeps every driver default.
• IPv6 hosts are bracketed in the URL.
• toString masks the password, like JdbcGenericConfig.
• Dependencies: the JDBC driver is api (pgjdbc 42.7.14, mysql-connector-j 26.7.0). The Flyway database module (flyway-database-postgresql / flyway-mysql) is runtimeOnly, so boot-db-flyway works without the application adding it.

Tests

• Config unit tests: URL, connection properties, password masking.
• Wiring tests: Hoplite (including strict mode alongside db.pool), Kodein, and Metro. They build the pool without connecting.
• Database tests against real postgres:18-alpine and mysql:8.4 containers, via Testcontainers 2.0.5. They check that connection settings reach the server and that a Flyway migration runs, which needs the runtimeOnly Flyway module.
  • Skipped where Docker is unavailable, except when CI is set, so they always run on GitHub Actions.
  • AGENTS.md notes how to run them with rootless Podman.

./gradlew build passes locally, with the container tests running under Podman.