无法创建具有多个数据源的数据库连接

Question

我收到以下错误：

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

Description:

Field dataSource in com.domain.ws.actuator.RandomActuator required a bean of type 'javax.sql.DataSource' that could not be found.
    - Bean method 'dataSource' not loaded because @ConditionalOnProperty (spring.datasource.type) did not find property 'spring.datasource.type'
    - Bean method 'dataSource' not loaded because @ConditionalOnProperty (spring.datasource.jndi-name) did not find property 'jndi-name'
    - Bean method 'dataSource' not loaded because @ConditionalOnBean (types: org.springframework.boot.jta.XADataSourceWrapper; SearchStrategy: all) did not find any beans

Action:

Consider revisiting the conditions above or defining a bean of type 'javax.sql.DataSource' in your configuration.

我用@ConfigurationProperties(prefix="spring.fooDataSource") 唯一标识了数据源名称，然后将spring.fooDataSource.url: ${dbURI} 放入yml 文件中。示例：

配置类

@Configuration
@PropertySource({"classpath:application.yml"})
public class RequestDataSource {

    /*******************************
     *      foo Datasource     *
     * *****************************/
    @Bean
    @Primary
    @ConfigurationProperties(prefix="spring.fooDataSource")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    /*******************************
     * foo Transaction manager *
     * *****************************/
    @Bean(name="tm1")
    @Primary
    @Autowired
    DataSourceTransactionManager tm1(@Qualifier("primaryDataSource") DataSource datasource) {
        DataSourceTransactionManager txm  = new DataSourceTransactionManager(datasource);
        return txm;
    }

}

第二个数据源类

@Configuration
@PropertySource({"classpath:application.yml"})
public class KeyviewDataSource {

    /*******************************
     *     Second Datasource      *
     * *****************************/
    @Bean
    @ConfigurationProperties(prefix="spring.secondDataSource")
    public DataSource secondaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    /*******************************
     * Second Transaction manager *
     * *****************************/
    @Bean(name="tm2")
    @Autowired
    DataSourceTransactionManager tm2(@Qualifier("secondaryDataSource") DataSource datasource) {
        DataSourceTransactionManager txm  = new DataSourceTransactionManager(datasource);
        return txm;
    }

}

Application.yml

spring:

  fooDataSource.url: ${dbURI}
  fooDataSource.username: ${dbUsername}
  fooDataSource.password: ${dbPassword}
  fooDataSource.driverClassName: oracle.jdbc.OracleDriver

  secondDataSource.url: ${dbURIkeyview}
  secondDataSource.username: ${dbUSERNAMEkeyview}
  secondDataSource.password: ${dbPasswordKeyview}
  secondDataSource.driverClassName: oracle.jdbc.OracleDriver

我正在使用 gradle，在这个模块中我确实添加了它需要的依赖项：

compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-jpa', version: springBootVersion
    // https://mvnrepository.com/artifact/org.hibernate/hibernate-java8
    compile group: 'org.hibernate', name: 'hibernate-java8', version: '5.0.0.CR1'

----------------------更新 1------------ ----------------------

注意

在我的 applications.yml 文件中，Intellij 以黄色突出显示我的数据源，当将鼠标悬停在它们上面时，它显示为 "Cannot resolve configuration property"

--------------更新2-------- ----------

由于更改太多，我创建了一个与此相关的新问题HERE

-------------------更新3-------------- ----------------

我通过创建spring-configuration-metadata.json 文件解决了更新一的问题 并执行以下操作：

{
    "properties": [
        {
            "name": "spring.fooDataSource.username",
            "type": "java.lang.String",
            "description": "Description for spring.requestDataSource.username."
        },
        {
            "name": "spring.fooDataSource.url",
            "type": "java.lang.String",
            "description": "Description for spring.requestDataSource.url."
        },
        {
            "name": "spring.fooDataSource.driverClassName",
            "type": "java.lang.String",
            "description": "Description for spring.requestDataSource.driverClassName."
        },

并将其放置在资源文件夹中。

Answer 1

我认为问题出在您的yml 文件中。您可以在 Spring Boot 中轻松设置两个数据库。只需将您的文件 Application.yml 更改为：

spring:
  fooDataSource.url: ${dbURI}
  fooDataSource.username: ${dbUsername}
  fooDataSource.password: ${dbPassword}
  fooDataSource.driverClassName: oracle.jdbc.OracleDriver

second:
  secondDataSource.url: ${dbURIkeyview}
  secondDataSource.username: ${dbUSERNAMEkeyview}
  secondDataSource.password: ${dbPasswordKeyview}
  secondDataSource.driverClassName: oracle.jdbc.OracleDriver

然后是你的配置类：

@Configuration
@PropertySource({"classpath:application.yml"})
public class RequestDataSource {

    /*******************************
     *      foo Datasource     *
     * *****************************/
    @Bean
    @Primary
    @ConfigurationProperties(prefix="spring.fooDataSource")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    /*******************************
    *     Second Datasource      *
   * *****************************/
   @Bean
   @ConfigurationProperties(prefix="second.secondDataSource")
   public DataSource secondaryDataSource() {
      return DataSourceBuilder.create().build();
   }

}

因为我认为两个数据库不能使用相同的前缀。