Spring MQTT JAva Config example issue - spring

Question

Where I can find example how to work with MQTT + JAva Config ?
This not working for me: http://docs.spring.io/spring-integration/reference/html/mqtt.html

Answer 1

Resolved by using Spring Boot
#Configuration
#ComponentScan
#EnableAutoConfiguration
#IntegrationComponentScan
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
#Bean
public MessageChannel mqttInputChannel() {
return new DirectChannel();
}
#Bean
public MqttPahoClientFactory mqttClientFactory() {
DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();
factory.setServerURIs("tcp://url:10423");
factory.setUserName("username");
factory.setPassword("password");
return factory;
}
#Bean
public MessageProducer inbound() {
MqttPahoMessageDrivenChannelAdapter adapter =
new MqttPahoMessageDrivenChannelAdapter("testMqtt", mqttClientFactory(),
"test");
adapter.setCompletionTimeout(5000);
adapter.setConverter(new DefaultPahoMessageConverter());
adapter.setQos(1);
adapter.setOutputChannel(mqttInputChannel());
return adapter;
}
#Bean
#ServiceActivator(inputChannel = "mqttInputChannel")
public MessageHandler handler() {
return new MessageHandler() {
#Override
public void handleMessage(Message<?> message) throws MessagingException {
System.out.println("!!!!!!!!!!!!!!!!!!!" + message.getPayload());
}
};
}
#Bean
#ServiceActivator(inputChannel = "mqttOutboundChannel")
public MessageHandler mqttOutbound() {
MqttPahoMessageHandler messageHandler =
new MqttPahoMessageHandler("testClient", mqttClientFactory());
messageHandler.setAsync(true);
messageHandler.setDefaultTopic("test");
return messageHandler;
}
#Bean
public MessageChannel mqttOutboundChannel() {
return new DirectChannel();
}
#MessagingGateway(defaultRequestChannel = "mqttOutboundChannel")
public interface MyGateway {
void sendToMqtt(String data);
}
}

Answer 2

I am glad you have found a solution.
I created a sample app that uses the Java DSL to read from stdin, send to MQTT, receive and log.
Here are the pertinent bits:
// publisher
#Bean
public IntegrationFlow mqttOutFlow() {
return IntegrationFlows.from(CharacterStreamReadingMessageSource.stdin(),
e -> e.poller(Pollers.fixedDelay(1000)))
.transform(p -> p + " sent to MQTT")
.handle(mqttOutbound())
.get();
}
#Bean
public MessageHandler mqttOutbound() {
MqttPahoMessageHandler messageHandler = new MqttPahoMessageHandler("siSamplePublisher", mqttClientFactory());
messageHandler.setAsync(true);
messageHandler.setDefaultTopic("siSampleTopic");
return messageHandler;
}
// consumer
#Bean
public IntegrationFlow mqttInFlow() {
return IntegrationFlows.from(mqttInbound())
.transform(p -> p + ", received from MQTT")
.handle(logger())
.get();
}
private LoggingHandler logger() {
LoggingHandler loggingHandler = new LoggingHandler("INFO");
loggingHandler.setLoggerName("siSample");
return loggingHandler;
}
#Bean
public MessageProducerSupport mqttInbound() {
MqttPahoMessageDrivenChannelAdapter adapter = new MqttPahoMessageDrivenChannelAdapter("siSampleConsumer",
mqttClientFactory(), "siSampleTopic");
adapter.setCompletionTimeout(5000);
adapter.setConverter(new DefaultPahoMessageConverter());
adapter.setQos(1);
return adapter;
}
.
foo
14:40:56.770 [MQTT Call: siSampleConsumer] INFO siSample - foo sent to MQTT, received from MQTT
EDIT
The official Spring Integration MQTT Sample with Annotations & DSL Configuration is located here: https://github.com/spring-projects/spring-integration-samples/tree/master/basic/mqtt

Answer 3

I am trying that. http://docs.spring.io/spring-integration/reference/html/mqtt.htmlIt is working well. My source is this
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.integration.annotation.MessagingGateway;
import org.springframework.integration.annotation.ServiceActivator;
import org.springframework.integration.channel.DirectChannel;
import org.springframework.integration.core.MessageProducer;
import org.springframework.integration.mqtt.core.DefaultMqttPahoClientFactory;
import org.springframework.integration.mqtt.core.MqttPahoClientFactory;
import org.springframework.integration.mqtt.inbound.MqttPahoMessageDrivenChannelAdapter;
import org.springframework.integration.mqtt.outbound.MqttPahoMessageHandler;
import org.springframework.integration.mqtt.support.DefaultPahoMessageConverter;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.MessageHandler;
import org.springframework.messaging.MessagingException;
#SpringBootApplication
public class MqttApplication {
public static void main(String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(MqttApplication.class, args);
MyGateway gateway = context.getBean(MyGateway.class);
gateway.sendToMqtt("foo");
}
#Bean
public MessageChannel mqttInputChannel() {
return new DirectChannel();
}
#Bean
public MqttPahoClientFactory mqttClientFactory() {
DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();
MqttConnectOptions options = new MqttConnectOptions();
options.setServerURIs(new String[] { "tcp://localhost:1883" });
factory.setConnectionOptions(options);
return factory;
}
#Bean
public MessageProducer inbound() {
MqttPahoMessageDrivenChannelAdapter adapter = new MqttPahoMessageDrivenChannelAdapter("testMqtt",
mqttClientFactory(), "testTopic");
adapter.setCompletionTimeout(5000);
adapter.setConverter(new DefaultPahoMessageConverter());
adapter.setQos(1);
adapter.setOutputChannel(mqttInputChannel());
return adapter;
}
#Bean
#ServiceActivator(inputChannel = "mqttInputChannel")
public MessageHandler handler() {
return new MessageHandler() {
#Override
public void handleMessage(Message<?> message) throws MessagingException {
System.out.println(message.getPayload());
}
};
}
#Bean
#ServiceActivator(inputChannel = "mqttOutboundChannel")
public MessageHandler mqttOutbound() {
MqttPahoMessageHandler messageHandler = new MqttPahoMessageHandler("testClient", mqttClientFactory());
messageHandler.setAsync(true);
messageHandler.setDefaultTopic("testTopic");
return messageHandler;
}
#Bean
public MessageChannel mqttOutboundChannel() {
return new DirectChannel();
}
#MessagingGateway(defaultRequestChannel = "mqttOutboundChannel")
public interface MyGateway {
void sendToMqtt(String data);
}
}