Publisher Confirms

spring.cloud.stream.bindings.input-in-0.group=someGroup
spring.cloud.stream.bindings.input-in-0.consumer.batch-mode=true

spring.cloud.stream.source=output
spring.cloud.stream.bindings.output-out-0.producer.error-channel-enabled=true

spring.cloud.stream.rabbit.bindings.output-out-0.producer.useConfirmHeader=true
spring.cloud.stream.rabbit.bindings.input-in-0.consumer.auto-bind-dlq=true
spring.cloud.stream.rabbit.bindings.input-in-0.consumer.batch-size=10

spring.rabbitmq.publisher-confirm-type=correlated
spring.rabbitmq.publisher-returns=true

@SpringBootApplication
public class Application {

	private static final Logger log = LoggerFactory.getLogger(Application.class);

	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}

	@Autowired
	private StreamBridge bridge;

	@Bean
	Consumer<List<String>> input() {
		return list -> {
			List<MyCorrelationData> results = new ArrayList<>();
			list.forEach(str -> {
				log.info("Received: " + str);
				MyCorrelationData corr = new MyCorrelationData(UUID.randomUUID().toString(), str);
				results.add(corr);
				this.bridge.send("output-out-0", MessageBuilder.withPayload(str.toUpperCase())
						.setHeader(AmqpHeaders.PUBLISH_CONFIRM_CORRELATION, corr)
						.build());
			});
			results.forEach(correlation -> {
				try {
					Confirm confirm = correlation.getFuture().get(10, TimeUnit.SECONDS);
					log.info(confirm + " for " + correlation.getPayload());
					if (correlation.getReturnedMessage() != null) {
						log.error("Message for " + correlation.getPayload() + " was returned ");

						// throw some exception to invoke binder retry/error handling

					}
				}
				catch (InterruptedException e) {
					Thread.currentThread().interrupt();
					throw new IllegalStateException(e);
				}
				catch (ExecutionException | TimeoutException e) {
					throw new IllegalStateException(e);
				}
			});
		};
	}


	@Bean
	public ApplicationRunner runner(BatchingRabbitTemplate template) {
		return args -> IntStream.range(0, 10).forEach(i ->
				template.convertAndSend("input-in-0", "input-in-0.rbgh303", "foo" + i));
	}

	@Bean
	public BatchingRabbitTemplate template(CachingConnectionFactory cf, TaskScheduler taskScheduler) {
		BatchingStrategy batchingStrategy = new SimpleBatchingStrategy(10, 1000000, 1000);
		return new BatchingRabbitTemplate(cf, batchingStrategy, taskScheduler);
	}

}

class MyCorrelationData extends CorrelationData {

	private final String payload;

	MyCorrelationData(String id, String payload) {
		super(id);
		this.payload = payload;
	}

	public String getPayload() {
		return this.payload;
	}

}