Package org.springframework.integration.dsl

Interface IntegrationFlow

All Known Implementing Classes:
IntegrationFlowAdapter, StandardIntegrationFlow
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface
public interface IntegrationFlow
The main Integration DSL abstraction.

The StandardIntegrationFlow implementation (produced by IntegrationFlowBuilder) represents a container for the integration components, which will be registered in the application context. Typically, is used as a @Bean definition: 

  @Bean
  public IntegrationFlow fileReadingFlow() {
      return IntegrationFlows
             .from(Files.inboundAdapter(tmpDir.getRoot()), e -> e.poller(Pollers.fixedDelay(100)))
             .transform(Files.fileToString())
             .channel(MessageChannels.queue("fileReadingResultChannel"))
             .get();
  }

Can be used as a Lambda for top level definition as well as sub-flow definitions: 

 @Bean
 public IntegrationFlow routerTwoSubFlows() {
     return f -> f
               .split()
               .<Integer, Boolean>route(p -> p % 2 == 0, m -> m
                              .subFlowMapping(true, sf -> sf.<Integer>handle((p, h) -> p * 2))
                              .subFlowMapping(false, sf -> sf.<Integer>handle((p, h) -> p * 3)))
               .aggregate()
               .channel(MessageChannels.queue("routerTwoSubFlowsOutput"));
 }

Also, this interface can be implemented directly to encapsulate the integration logic in the target service: 

  @Component
  public class MyFlow implements IntegrationFlow {

        @Override
        public void configure(IntegrationFlowDefinition<?> f) {
                f.<String, String>transform(String::toUpperCase);
        }

  }
Since:
5.0
Author:
Artem Bilan
See Also:
IntegrationFlowBuilder, StandardIntegrationFlow, IntegrationFlowAdapter