如何使用Spring Boot JMS收听主题

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如何解决如何使用Spring Boot JMS收听主题？

我只是从以下网址获取了完整的Spring引导示例：https：//github.com/spring-guIDes/gs-messaging- jms/

在此创建用于从队列发送和接收消息。要将其更改为主题，必须在Factory实例中设置Pub-Sub属性。

import org.springframework.beans.factory.support.beanDeFinitionBuilder;
import org.springframework.beans.factory.support.Defaultlistablebeanfactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jms.DefaultJmsListenerContainerFactoryConfigurer;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.Annotation.bean;
import org.springframework.jms.Annotation.EnableJms;
import org.springframework.jms.config.DefaultJmsListenerContainerFactory;
import org.springframework.jms.config.JmsListenerContainerFactory;
import org.springframework.jms.connection.CachingConnectionFactory;
import org.springframework.jms.core.jmstemplate;
import org.springframework.jms.support.converter.MapPingJackson2messageConverter;
import org.springframework.jms.support.converter.messageConverter;
import org.springframework.jms.support.converter.messageType;

import javax.jms.ConnectionFactory;

@SpringBootApplication
@EnableJms
public class JmsSampleApplication {

public voID registerBeans(ConfigurableApplicationContext context ){
    BeanDeFinitionBuilder builder = BeanDeFinitionBuilder.rootBeanDeFinition(jmstemplate.class);
    CachingConnectionFactory cachingConnectionFactory = new CachingConnectionFactory();

    builder.addPropertyValue("connectionFactory", cachingConnectionFactory);      // set property value
    Defaultlistablebeanfactory factory = (Defaultlistablebeanfactory) context.getautowireCapablebeanfactory();
    factory.registerBeanDeFinition("jmstemplatename", builder.getBeanDeFinition());
}

@Bean
public JmsListenerContainerFactory<?> topicListenerFactory(ConnectionFactory connectionFactory,
                                                DefaultJmsListenerContainerFactoryConfigurer configurer) {
    DefaultJmsListenerContainerFactory factory = new DefaultJmsListenerContainerFactory();
    factory.setPubSubDomain(true);
    // This provIDes all boot's default to this factory, including the message converter
    configurer.configure(factory, connectionFactory);
    // You Could still overrIDe some of Boot's default if necessary.
    return factory;
}

@Bean
public JmsListenerContainerFactory<?> queueListenerFactory(ConnectionFactory connectionFactory,
                                                           DefaultJmsListenerContainerFactoryConfigurer configurer) {
    DefaultJmsListenerContainerFactory factory = new DefaultJmsListenerContainerFactory();
    //factory.setPubSubDomain(true);
    // This provIDes all boot's default to this factory, including the message converter
    configurer.configure(factory, connectionFactory);
    return factory;
}

@Bean // serialize message content to Json using Textmessage
public messageConverter jacksonJmsmessageConverter() {
    MapPingJackson2messageConverter converter = new MapPingJackson2messageConverter();
    converter.settargettype(messageType.TEXT);
    converter.setTypEIDPropertyname("_type");
    return converter;
}
public static voID main(String[] args) {
    ConfigurableApplicationContext context = SpringApplication.run(JmsSampleApplication.class, args);

    jmstemplate jmstemplate = context.getBean(jmstemplate.class);

    // Send a message with a POJO - the template reuse the message converter
    System.out.println("Sending an email message.");
    jmstemplate.convertAndSend("mailBox.topic", new Email("info@example.com", "Hello"));
    jmstemplate.convertAndSend("mailBox.queue", new Email("info@example.com", "Hello"));

    }
}

package org.springboot.jms;

import org.springframework.jms.Annotation.JmsListener;
import org.springframework.stereotype.Component;

/**
 * Created by RGOVIND on 10/20/2016.
 */
@Component
public class HellotopicListener {

    @JmsListener(desTination = "mailBox.topic", containerFactory = "topicListenerFactory")
    public voID receivetopicmessage(Email email) {
        System.out.println("Received <" + email + ">");
    }

    @JmsListener(desTination = "mailBox.queue", containerFactory = "queueListenerFactory")
    public voID receiveQueuemessage(Email email) {
        System.out.println("Received <" + email + ">");
    }
}

完成此操作后，您就可以全部订阅所选的主题。

当然，有多种方法，您可以为不同的jmstemplates提供一个bean映射，当您根据队列或主题需要它们时可以使用每种bean。模板和bean可以用您选择的本SO问题中讨论的方法实例化。希望能帮助到你

解决方法

    @Component
    public class myTopicListener {

        @JmsListener(desTination = "${trans.alert.topic}")
        public void receivemessage(transactionAlert alert) {
            logger.info("AlertSubscriberEmail :: Sending Email => <" + alert + ">");
        }
    }

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