创建名称为 'rabbitTemplate' 的 bean 时出错 - CloudAMQP 使用 Spring 引导

Question

所以我想创建一个简单的队列，每次向其中发送短信时我只发送数据。

我正在使用 CloudAMQP，他们的文档为我提供了一个 Java 代码供我使用，当运行单独使用时它确实有效，当我添加 Spring 引导时出现问题混音，这是 class:

public class CloudAMQPService {

    private final static String QUEUE_NAME = "HEREGOESQUEUENAME";

    public void sendMessage(String message) throws Exception {
        String uri = System.getenv("CLOUDAMQP_URL");
        if (uri == null) uri = "HEREGOESURL";
        ConnectionFactory factory = new ConnectionFactory();
        factory.setUri(uri);
        factory.setConnectionTimeout(30000);
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        channel.basicPublish("", QUEUE_NAME, null, message.getBytes());
        System.out.println(" [x] Sent '" + message + "'");
        channel.close();
        connection.close();
    }
}

当运行在无框架 Java 应用程序上时，我实际上可以发送消息，但是如果我尝试使用 Spring Boot 调用它，我会收到此错误：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'rabbitTemplate' defined in class path resource [org/springframework/boot/autoconfigure/amqp/RabbitAutoConfiguration$RabbitTemplateConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.amqp.rabbit.core.RabbitTemplate] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
at 

org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:570) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean[=13=](AbstractBeanFactory.java:320) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744) [spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391) [spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) [spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204) [spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
    at pe.edu.upc.integracion.IntegracionApplication.main(IntegracionApplication.java:28) [classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_144]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_144]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_144]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_144]
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.1.8.RELEASE.jar:2.1.8.RELEASE]
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.amqp.rabbit.core.RabbitTemplate] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:507) ~[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:367) ~[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.buildPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:432) ~[spring-orm-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:406) ~[spring-orm-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(PersistenceAnnotationBeanPostProcessor.java:333) ~[spring-orm-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:1077) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:567) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    ... 20 common frames omitted
Caused by: java.lang.NoClassDefFoundError: com/rabbitmq/client/ConfirmCallback
    at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_144]
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_144]
    at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_144]
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:489) ~[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    ... 26 common frames omitted
Caused by: java.lang.ClassNotFoundException: com.rabbitmq.client.ConfirmCallback
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_144]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_144]
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335) ~[na:1.8.0_144]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_144]
    ... 30 common frames omitted


Process finished with exit code 0

尝试将 restTemplate 添加为 class 上的自动装配但无济于事，它仍然给我一个错误，不确定发生了什么

Answer 1

问这样的问题时需要显示完整的堆栈跟踪；永远不要截断堆栈跟踪。

Boot 假定您正在使用 Spring AMQP，它是 Spring 对 RabbitMQ 客户端的抽象。禁用 Boot 的自动配置（请参阅引导文档）或使用 Spring AMQP 而不是直接使用客户端。

最后，为每次发送打开和关闭连接和通道是相当昂贵的。

Spring AMQP 为您缓存连接和通道。参见 the documentation。

创建名称为 'rabbitTemplate' 的 bean 时出错 - CloudAMQP 使用 Spring 引导

Error creating bean with name 'rabbitTemplate' - CloudAMQP with Spring Boot

spring-boot

spring-rabbit

cloudamqp