Question

我正在将服务从Spring Boot 1.5迁移到Spring Boot 2.1，在此过程中出现错误。我有以下用于配置Spring bean的类：

@Configuration
public class CompanyTransactionConfiguration {
    public CompanyTransactionConfiguration() {
    }

    @Bean
    public TransactionTaskRunner transactionTaskRunner(PlatformTransactionManager transactionManager) {
        return new TransactionTaskRunnerImpl(this.readWriteTransactionTemplate(transactionManager), this.readOnlyTransactionTemplate(transactionManager), this.newReadWriteTransactionTemplate(transactionManager));
    }
}

当然还有一个测试类，用于检查一切是否按预期进行：

@RunWith(SpringRunner.class)
public class ReferrerActivityRepositoryIT extends AbstractDomainIT {

    @Autowired
    private ReferrerActivityRepository referrerActivityRepository;

    @Autowired
    private TransactionTaskRunner transactionTaskRunner;

    ...
}

问题是，在我将依赖项更改为较新的Spring Boot版本（2.1）之后，此测试工作正常，但是现在出现以下错误：

***************************
APPLICATION FAILED TO START
***************************

Description:

Parameter 0 of method transactionTaskRunner in com.company.core.server.config.CompanyTransactionConfiguration required a bean of type 'org.springframework.transaction.PlatformTransactionManager' that could not be found.

The following candidates were found but could not be injected:
    - Bean method 'transactionManager' in 'DataSourceTransactionManagerAutoConfiguration.DataSourceTransactionManagerConfiguration' not loaded because @ConditionalOnSingleCandidate (types: javax.sql.DataSource; SearchStrategy: all) did not find any beans
    - Bean method 'kafkaTransactionManager' in 'KafkaAutoConfiguration' not loaded because @ConditionalOnProperty (spring.kafka.producer.transaction-id-prefix) did not find property 'spring.kafka.producer.transaction-id-prefix' 

...


Action:

Consider revisiting the entries above or defining a bean of type 'org.springframework.transaction.PlatformTransactionManager' in your configuration.

我不知道发生了什么，也许由于弹簧启动中的更改或我的application.properties文件的原因，我需要添加另一个依赖项。问题是为什么会这样？我该如何更改才能使它正常工作？

谢谢！

Answer 1

您没有定义PlatformTransactionManager bean。我想你不想自己做。您必须向属性文件中添加spring.kafka.producer.transaction-id-prefix属性，才能将KafkaAutoConfiguration用于PlatformTransactionManager。

未加载'KafkaAutoConfiguration'中的Bean方法'kafkaTransactionManager'，因为@ConditionalOnProperty（spring.kafka.producer.transaction-id-prefix）找不到属性spring.kafka.producer.transaction-id-prefix

只要您的CompanyTransactionConfiguration构造函数没有参数，它就是多余的。如果类中没有构造函数，编译器将创建不带参数的默认构造函数。

迁移Spring Boot时找不到Bean参数

1 个答案: