package stream.consumer.integration;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.stream.annotation.EnableBinding;
import org.springframework.context.annotation.Bean;
import org.springframework.integration.dsl.IntegrationFlow;
import org.springframework.integration.dsl.IntegrationFlows;
import org.springframework.messaging.SubscribableChannel;
import stream.consumer.ConsumerChannels;
@SpringBootApplication
@EnableBinding(ConsumerChannels.class)
// <1>
public class StreamConsumer {
public static void main(String args[]) {
SpringApplication.run(StreamConsumer.class, args);
}
// <2>
private IntegrationFlow incomingMessageFlow(SubscribableChannel incoming,
String prefix) {
Log log = LogFactory.getLog(getClass());
return IntegrationFlows
.from(incoming)
.transform(String.class, String::toUpperCase)
.handle(
String.class,
(greeting, headers) -> {
log.info("greeting received in IntegrationFlow (" + prefix + "): "
+ greeting);
return null;
}).get();
}
@Bean
IntegrationFlow direct(ConsumerChannels channels) {
return incomingMessageFlow(channels.directed(), "directed");
}
@Bean
IntegrationFlow broadcast(ConsumerChannels channels) {
return incomingMessageFlow(channels.broadcasts(), "broadcast");
}
}
