org.springframework.integration.dsl.support.Function Java Examples

The following examples show how to use org.springframework.integration.dsl.support.Function. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: WebSocketIntegration.java    From building-microservices with Apache License 2.0 6 votes vote down vote up 
@Bean
public IntegrationFlow webSocketFlow(EchoService echoService) {
	return (IntegrationFlowDefinition<?> integrationFlowDefinition) -> {
		Function<String, Object> splitter = (String messagePayload) -> {

			// convert the payload
			String echoValue = echoService.echo(messagePayload);

			// for each of the active WS sessions,
			// build a Message destined for that session containing the
			// input message
			return serverWebSocketContainer().getSessions().keySet().stream()
					.map(s -> MessageBuilder.withPayload(echoValue)
							.setHeader(SimpMessageHeaderAccessor.SESSION_ID_HEADER, s)
							.build())
					.collect(Collectors.toList());
		};

		integrationFlowDefinition.split(String.class, splitter)
				.channel(c -> c.executor(Executors.newCachedThreadPool()))
				.handle(webSocketOutboundAdapter());
	};
}
Example #2
Source File: OrderEntryProducerConfiguration.java    From event-based-shopping-system with MIT License 5 votes vote down vote up 
@Bean(name = OUTBOUND_ID)
public IntegrationFlow producer() {

	log.info("starting producer flow..");

	return flowDefinition -> {
		Consumer<KafkaProducerMessageHandlerSpec.ProducerMetadataSpec> producerMetadataSpecConsumer = (
				KafkaProducerMessageHandlerSpec.ProducerMetadataSpec metadata) -> metadata
				.async(true).batchNumMessages(5)
				.valueClassType(String.class);

		Consumer<PropertiesBuilder> producerProperties = props -> props
				.put("queue.buffering.max.ms", "15000");
		Function<Message<Object>, ?> messageKey = m -> m.getHeaders().get(
				IntegrationMessageHeaderAccessor.SEQUENCE_NUMBER);
		KafkaProducerMessageHandlerSpec outboundChannelAdapter = Kafka
				.outboundChannelAdapter(producerProperties);
		String topic = this.kafkaConfig.getTopic();
		String brokerAddress = this.kafkaConfig.getBrokerAddress();

		KafkaProducerMessageHandlerSpec messageHandlerSpec = outboundChannelAdapter
				.messageKey(messageKey).addProducer(topic, brokerAddress,
						producerMetadataSpecConsumer);

		flowDefinition.handle(messageHandlerSpec);
	};
}