Use jdbcPollingChannelAdapter to perform multiple queries - spring-integration

Question

I am new to spring integration, I have requirements similar to the below, data is being read from multiple tables. I am trying to implement jdbcpollingchanneladapter and jdbcMessageHandler, can anyone help with an example using java DSL?
Read the list of people
For each person get a list of departments
For each department get a list of managers
For each manager get the list of people
b. process the people information
c. write the information into a csv
I am using MessageSource to before DB queries and mapping result values to POJO by using a Mapper. How do I use the results as lookup values to perform another query.
#EnableIntegration
public class IntegrationConfig {
#Autowired
DataSource dataSource;
#Autowired
PlatformTransactionManager transactionManager;
#Bean
public MessageChannel FamilyChannel() {
return new DirectChannel();
}
#Bean
#InboundChannelAdapter(value = "FamilyChannel", poller = #Poller(fixedDelay = "1000"))
public MessageSource<Object> familyNumberMessageSource() {
JdbcPollingChannelAdapter jdbcPollingChannelAdapter = new JdbcPollingChannelAdapter(dataSource, NCFBulkOrderQuery.SELECT_NCF_BULK_ORDER_DATE);
return jdbcPollingChannelAdapter;
}
#Bean
public MessageHandler familyNumberHandler(){
JdbcMessageHandler jdbcMessageHandler = new JdbcMessageHandler(dataSource, NCFBulkOrderQuery.SELECT_NCF_BULK_ORDER_DATE);
return jdbcMessageHandler;
}
#Bean
public IntegrationFlow jdbFlow() {
return IntegrationFlows
.from("FamilyChannel")
.handle(familyNumberMessageSource(), "receive")
.get();
}
}