Flink Scheduled JDBC Source

I have the following definition of the JDBC source in Apache Flink.

    val jdbcSource = JdbcSource.builder<LoggedInEvent>()
    .setDBUrl("jdbc:postgresql://db:5432/postgres")
    .setSql("SELECT player_id, past_logins FROM user_initial_data")
    .setUsername("postgres")
    .setPassword("example")
    .setTypeInformation(TypeInformation.of(PlayerLoggedInEvent::class.java))
    .setResultExtractor { LoggedInEvent(it.getInt(1).toString(), it.getInt(2), Instant.now().toEpochMilli()) }
    .build()

val snapshotsStream = env.fromSource(jdbcSource, WatermarkStrategy.noWatermarks(), "LoggedInSnapshots")

Currently I'm experiencing two issues with this solution:

1. I can't schedule this to execute every N seconds, so is there any simple way to do it with existing tooling?
2. This is realted to #1, but this executes only once and job finishes. I want this to be scheduled and run continuously within the same job.

Flink does not provide this sort of scheduling, or polling.

On the other hand, Kafka Connect does this support this: https://docs.confluent.io/kafka-connectors/jdbc/current/source-connector/source_config_options.html