java - 没有可用的 'org.context.Databasetransactionlistener' 类型的合格 bean : expected at least 1 bean which qualifies as autowire candidate

Question

我尝试使用此代码:

@SpringBootApplication
@ComponentScan("org.package.context")
public class ContextServer extends SpringBootServletInitializer {

    private static Class<ContextServer> applicationClass = ContextServer.class;

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        ////
        return application.sources(applicationClass);
    }

    @Bean
    public SimpleMessageListenerContainer databaseTransactionContainer(ConnectionFactory cf,
            Databasetransactionlistener listener) {
        SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(cf);
        container.setQueueNames(QUEUE_DATABASE_TRANSACTION);
        container.setExclusive(true);
        container.setConcurrentConsumers(1);
        container.setAcknowledgeMode(AcknowledgeMode.MANUAL);
        container.setMessageListener(new MessageListenerAdapter(listener, "databasetransaction"));
        container.setMessageConverter(new SerializerMessageConverter());
        return container;
    }
}

@Component
class Databasetransactionlistener {

    public TransactionsBean databasetransaction(TransactionsBean ro) {
        TransactionsBean obj = new TransactionsBean();
        System.out.println("!!!! Performing TransactionsBean processing !!!!");
        obj.setTransaction_id(" ??? some_id: " + ro.getMerchant_id());
        return obj;
    }
}

但是当我部署代码时出现异常:没有 'org.database.context.Databasetransactionlistener' 类型的合格 bean 可用:预计至少有 1 个符合 Autowiring 候选资格的 bean。依赖注释:{}

完整日志:https://pastebin.com/L99iV9i9

你能建议我如何解决这个问题吗？也许我缺少一些配置？

Answer 1

您的 bean Databasetransactionlistener 尚未注册。扫描从上课开始就开始。

添加DependsOn SimpleMessageListenerContainer 确保您的类已首先注册。

顺便说一句，@SpringBootApplication 已经有 @ComponentScan。