spring integration leader starter

spring-integration-leader-starter

1. Installation
2. Usage

Installation

Zookeeper

Use a spring-boot autoconfiguration aware module such as the following:

<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-zookeeper-core</artifactId>
</dependency>

... or manually define a bean that creates the CuratorFramework:

@Configuration
public class MyZookeeperConfiguration {

   @Bean
   CuratorFrameworkFactoryBean curatorFramework() {
       return new CuratorFrameworkFactoryBean("localhost:2181");
   }

}

Hazelcast

TODO

Lock-Registry

TODO

Usage

Leader Aware Integration Endpoints

You can define that some of your integration endpoints become "leader-aware" by declaring their endpoint bean name in your spring configuration file.

Example:

@Configuration
public class FlowExampleConfig {

    private static final Logger LOGGER = LoggerFactory.getLogger(FlowExampleConfig.class);

    private static final String POLLER_BEAN_NAME = "sample-polling-endpoint";

    @Bean
    IntegrationFlow sampleIntegrationFlow() {
        return IntegrationFlows
                .from(() -> UUID.randomUUID().toString(), c -> c
                        .id(POLLER_BEAN_NAME)
                        .poller(p -> p.fixedDelay(1000))
                        .autoStartup(true))
                .handle((GenericHandler<String>) (payload, headers) -> {
                    LOGGER.info("Handle Message: {}", payload);
                    return null;
                })
                .get();
    }
}

In your application.[yml|property] define the endpoint-bean-id as

spring-integration:
  leader-aware:
    endpoints: sample-polling-endpoint