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@ -2934,6 +2934,140 @@ more details.
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[[boot-features-amqp]]
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=== AMQP
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The Advanced Message Queuing Protocol (AMQP) is a platform-neutral, wire-level protocol for
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message-oriented middleware. The Spring AMQP project applies core Spring concepts to the development of
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AMQP-based messaging solutions.
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[[boot-features-rabbitmq]]
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==== RabbitMQ support
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RabbitMQ is a lightweight, reliable, scalable and portable message broker based on the AMQP protocol.
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Spring uses RabbitMQ to communicate using the AMQP protocol.
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RabbitMQ configuration is controlled by external configuration properties in
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`+spring.rabbitmq.*+`. For example, you might declare the following section in
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`application.properties`:
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[source,properties,indent=0]
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----
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spring.rabbitmq.host=localhost
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spring.rabbitmq.port=5672
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spring.rabbitmq.username=guest
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spring.rabbitmq.password=guest
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----
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See
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{sc-spring-boot-autoconfigure}/amqp/RabbitProperties.{sc-ext}[`RabbitProperties`]
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for more of the supported options.
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TIP: Check http://spring.io/blog/2010/06/14/understanding-amqp-the-protocol-used-by-rabbitmq/[Understanding AMQP, the protocol used by RabbitMQ]
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for more details.
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[[boot-features-using-amqp-template]]
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[[boot-features-using-amqp-sending]]
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==== Sending a message
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Spring's `AmqpTemplate` and `AmqpAdmin` are auto-configured and you can autowire them directly into your own
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beans:
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[source,java,indent=0]
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----
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.amqp.core.AmqpAdmin;
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import org.springframework.amqp.core.AmqpTemplate;
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import org.springframework.stereotype.Component;
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@Component
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public class MyBean {
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private final AmqpAdmin amqpAdmin;
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private final AmqpTemplate amqpTemplate;
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@Autowired
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public MyBean(AmqpAdmin amqpAdmin, AmqpTemplate amqpTemplate) {
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this.adminTemplate = adminTemplate;
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this.amqpTemplate = amqpTemplate;
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}
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// ...
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}
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----
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To send a message you should declare a queue using `AmqpAdmin` and then use `AmqpTemplate` to send
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the message to the declared queue.
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[source,java,indent=0]
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----
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.amqp.core.AmqpAdmin;
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import org.springframework.amqp.core.AmqpTemplate;
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import org.springframework.stereotype.Component;
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@Component
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public class MyBean {
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// ...
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@PostConstruct
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public void setUpQueue() {
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this.amqpAdmin.declareQueue(new Queue("foo"));
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}
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public void send() {
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this.rabbitTemplate.convertAndSend("foo", "hello");
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}
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}
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----
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[[boot-features-using-amqp-receiving]]
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==== Receiving a message
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Spring's `ConnectionFactory` is auto-configured and you can autowire it directly into your own
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beans.
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To receive a message from a queue you should create a `SimpleMessageListenerContainer`
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using the configured `ConnectionFactory`. The `SimpleMessageListenerContainer` is
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responsible for handling incoming messages through it's `MessageListenerAdapter`.
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[source,java,indent=0]
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----
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.amqp.rabbit.connection.ConnectionFactory;
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import org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer;
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import org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter;
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@SpringBootApplication
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public class AmqpDemoApplication {
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@Autowired
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private ConnectionFactory connectionFactory;
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@Bean
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public SimpleMessageListenerContainer container() {
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SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(
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this.connectionFactory);
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MessageListenerAdapter adapter = new MessageListenerAdapter(new Object() {
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public void handleMessage(String msg) {
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System.out.println(msg);
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}
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});
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container.setMessageListener(adapter);
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container.setQueueNames("foo");
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return container;
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}
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// ...
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}
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----
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In the code above the `SimpleMessageListenerContainer` was configured to receive messages from the declared "foo" queue.
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When a message is sent to "foo" queue it will be delivered to the handleMessage(String msg) method.
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[[boot-features-email]]
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[[boot-features-email]]
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== Sending email
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== Sending email
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The Spring Framework provides an easy abstraction for sending email using the
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The Spring Framework provides an easy abstraction for sending email using the
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