Spring Integration: JDBC single query to web service - spring-mvc

Question

I would like to know the way for resolving this integration scenario:
Execute different queries to select X elements from a database. I am
looking for an inbound adapter without pooling because it is just
necessary to execute the query once. Although, results of the queries
will be generate only one output.
Work with this data to build a SOAP request (generic web service)
Send this SOAP request to a web service and wait for an asynchronous response.
But also, it is necessary to deploy all this scenario in a WAR file on Tomcat server. I am deploying the application from a spring MVC + spring integration skeleton but I will not have any controller. Is it possible to execute the application when context was loaded on Tomcat?
I am working with the next technologies:
Spring integration
Spring MVC for a WAR deployment
Scheduling (Quartz or #Scheduled)
Spring WS
Regards

Answer 1

Since you say that you'd prefer to select on the application start up and only once, you can use:
<int-event:inbound-channel-adapter channel="jdbcChannel"
event-types="org.springframework.context.event.ContextRefreshedEvent"
payload-expression="''"/>
and <int-jdbc:outbound-gateway query="SELECT * FROM ..."/>
And so on to the WebService.
UPDATE
Since you say that you are around Anotation configuration, consider to use Spring Integration Java DSL.
To configure <int-event:inbound-channel-adapter> from #Configuration you should do this:
#Bean
#SuppressWarnings("unchecked")
public MessageProducer ApplicationEventListeningMessageProducer() {
ApplicationEventListeningMessageProducer producer = new ApplicationEventListeningMessageProducer();
producer.setEventTypes(ContextRefreshedEvent.class);
producer.setPayloadExpression("''");
producer.setOutputChannel(jdbcChannel());
return producer;
}
ContextRefreshedEvent info you can get from its JavaDocs or from Spring Framework Manual.