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Spring引导中的自定义自动配置找不到ConditionAlonBean的数据源

spring-boot-configuration spring-config spring-data-jpa spring-boot spring

1

Nagy Attila · 技术社区 · 8 年前

我的SpringBoot2.0.1.release有问题(在SpringBoot2.0.0.release中,下面的配置工作得很好)。

有人能帮我一下吗?为什么这个配置不起作用? 我有此配置,但此配置与 ConditionalOnBean 条件。

这个 AutoConfigureOrder / Order / AutoConfigureAfter 似乎没有任何效果。

@Configuration
@ConditionalOnClass({DataSource.class, JpaRepository.class})
@ConditionalOnBean(DataSource.class)
@AutoConfigureAfter(DataSourceAutoConfiguration.class)
@ConditionalOnProperty(prefix = "spring.data.jpa.repositories", name = "enabled", havingValue = "true", matchIfMissing = true)
@AutoConfigureOrder(LOWEST_PRECEDENCE)
@Order(LOWEST_PRECEDENCE)
public class MyJpaAuditAutoConfiguration {

    @ConditionalOnMissingBean
    @Bean
    public MyTransactionHelper transactionHelper() {
        return new MyTransactionHelper();
    }

}

在 spring.factories 我有:

     org.springframework.boot.autoconfigure.EnableAutoConfiguration=org.example.MyJpaAuditAutoConfiguration

此配置的应用程序启动输出:

DataSourceAutoConfiguration matched:
  - @ConditionalOnClass found required classes 'javax.sql.DataSource', 'org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

…

JpaAuditAutoConfiguration:
  Did not match:
     - @ConditionalOnBean (types: javax.sql.DataSource; SearchStrategy: all) did not find any beans of type javax.sql.DataSource (OnBeanCondition)
  Matched:
     - @ConditionalOnClass found required classes 'javax.sql.DataSource', 'org.springframework.data.jpa.repository.JpaRepository'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
     - @ConditionalOnProperty (spring.data.jpa.repositories.enabled=true) matched (OnPropertyCondition)

在我看来,config类是在 DataSourceAutoConfiguration 这就是为什么豆子找不到的原因。其他配置,如 DataSourceHealthIndicatorAutoConfiguration 找到了豆子。

DataSourceHealthIndicatorAutoConfiguration matched:
  - @ConditionalOnClass found required classes 'org.springframework.jdbc.core.JdbcTemplate', 'org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
  - @ConditionalOnEnabledHealthIndicator management.health.defaults.enabled is considered true (OnEnabledHealthIndicatorCondition)
  - @ConditionalOnBean (types: javax.sql.DataSource; SearchStrategy: all) found bean 'dataSource' (OnBeanCondition)

1 回复 | 直到 8 年前

1

0

Nagy Attila 7 年前

在Spring引导升级到版本之后 2.1.2.RELEASE 它是自动解决的。

(我在答案中重新命名了一些类)

所以在 Spring Boot version 2.1.2.RELEASE :

@Configuration
@ConditionalOnBean(DataSource.class)
@ConditionalOnClass({DataSource.class, JpaRepository.class})
@ConditionalOnProperty(prefix = "spring.data.jpa.repositories", name = "enabled", havingValue = "true", matchIfMissing = true)
@AutoConfigureAfter(DataSourceAutoConfiguration.class)
public class JpaTransactionHelperAutoConfiguration {

    @ConditionalOnMissingBean
    @Bean
    public TransactionHelper transactionHelper() {
        return new TransactionHelper();
    }

}

注意:通过移除 @AutoConfigureAfter(DataSourceAutoConfiguration.class) 在2.1.2.release版本的Spring引导中无法工作。

在 Spring Boot version 2.0.1.RELEASE 我刚把 ConditionalOnBean 注释:

@Configuration
@ConditionalOnClass({DataSource.class, JpaRepository.class})
@ConditionalOnProperty(prefix = "spring.data.jpa.repositories", name = "enabled", havingValue = "true", matchIfMissing = true)
@AutoConfigureAfter(DataSourceAutoConfiguration.class)
public class JpaTransactionHelperAutoConfiguration {

    @ConditionalOnMissingBean
    @Bean
    public TransactionHelper transactionHelper() {
        return new TransactionHelper();
    }

}