5

正如标题所说，我正在尝试使用类型安全配置属性来加载DataSourceConfig对象列表。我有用于 setter/getter 的 lombok

主要应用类注解

@Slf4j
@SpringBootApplication
@EnableConfigurationProperties
public class Application {

配置pojo

@Data
public class DataSourceConfig {
    private String key;
    private String dbname;
    private String dbpath;
}

.yml 文件

tenantdb:
    dataSourceConfig:
        -
            key: default 
            dbpath: file:eventstore/jdbc/database
            dbname: defaultdb
        -
            key: other
            dbpath: file:eventstore/jdbc/other
            dbname: dslfjsdf

最后是带有 @ConfigurationProperties 注解的 Spring Configuration 类。

@Configuration
@Profile("hsqldb")
@ImportResource(value = { "persistence-config.xml" })
@Slf4j
@ConfigurationProperties(prefix="tenantdb", locations={"datasources.yml"})
public class HsqlConfiguration {


    private List<DataSourceConfig> dataSourceConfig = new ArrayList<>();

    @Bean
    public List<DataSourceConfig> getDataSourceConfig() {
        return dataSourceConfig;
    }

通过上面的配置，我得到：

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hsqlConfiguration': Could not bind properties to [unknown] (target=tenantdb, ignoreInvalidFields=false, ignoreUnknownFields=true, ignoreNestedProperties=false); nested exception is java.lang.NullPointerException
    at org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.postProcessBeforeInitialization(ConfigurationPropertiesBindingPostProcessor.java:303)
    at org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.postProcessBeforeInitialization(ConfigurationPropertiesBindingPostProcessor.java:250)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:408)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initia

我尝试了各种组合。如果我将注释更改为@ConfigurationProperties(prefix="tenantdb.dataSourceConfig")，我不会收到错误但List<DataSourceConfig>为空。

帮助！！

4

1 回答 1

5

您应该将配置属性作为简单的 POJO 使用，只有 getter 和 setter，并有单独HsqlConfiguration的注入此属性的属性。

像这样的东西：

@Component
@ConfigurationProperties(prefix="tenantdb", locations={"datasources.yml"})
public class TenantDbProperties {

  //DataSourceConfig is POJO with key, dbpath and dbname
  private List<DataSourceConfig> dataSourceConfigs;       

  public List<DataSourceConfig> getDataSourceConfigs(){
      return dataSourceConfigs;
  }

  public void setDataSourceConfigs(List<DataSourceConfig> dataSourceConfigs){
      this.dataSourceConfigs = dataSourceConfigs;
  }
}

并在单独的类中将此属性注入为：

@Configuration
@Profile("hsqldb")
@ImportResource(value = { "persistence-config.xml" })
@Slf4j
public class HsqlConfiguration {

    @Autowired
    private TenantDbProperties tenantDbProperties;

    //code goes here where you can use tenantDbProperties.getDataSourceConfigs()
}
于 2015-11-17T08:09:21.420 回答