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Spring引导使用新前缀扩展现有属性类

spring-boot java

coderatchet · 技术社区 · 7 年前

我想设置一些自定义数据源属性( "app.datasource.alternate" )除了标准 DataSourceProperties ( "spring.datasource" )。

这两个数据源没有竞争(即 app.datasource.alternate 属性不是 spring.datasource 属性),并应在默认应用程序属性中彼此共存。

我希望这样的事情能奏效:

@ConfigurationProperties("app.datasource.alternate")
public class AlternateDataSourceProperties extends DataSourceProperties {}

但是,当我在yaml中定义属性时:

app:
  datasource:
    alternate: 
      schema-username: TEST

运行我的测试:

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = NONE)
@EnableConfigurationProperties({AlternateDataSourceProperties.class})
public class AlternateDataSourcePropertiesTest {

    @Autowired
    // @Qualifier("alternateDataSourceProperties")
    private AlternateDataSourceProperties props;

    @Test
    public void propertiesAreInjected() {
        assertThat(props.getSchemaUsername()).isEqualTo("TEST");
    }
}

程序失败 NoUniqueBeanDefinitionException 当试图创建 datasource 豆子在里面 DataSourceConfiguration.Tomcat 以下内容:

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Tomcat.class]: Unsatisfied dependency expressed through method 'dataSource' parameter 0; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'org.springframework.boot.autoconfigure.jdbc.DataSourceProperties' available: expected single matching bean but found 2: app.datasource.alternate-com.example.config.AlternateDataSourceProperties,spring.datasource-org.springframework.boot.autoconfigure.jdbc.DataSourceProperties
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:467)
Caused by: org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'org.springframework.boot.autoconfigure.jdbc.DataSourceProperties' available: \
  expected single matching bean but found 2: \
  app.datasource.alternate-com.example.config.AlternateDataSourceProperties \
  ,spring.datasource-org.springframework.boot.autoconfigure.jdbc.DataSourceProperties
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveNotUnique(DependencyDescriptor.java:173)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1116)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:835)
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741)
    ... 66 more

我不想重写已经存在的整个属性类,只需要在不同的前缀下添加一组属性。这在弹簧靴中是可能的吗?

我用的是弹簧靴1.5.x

更新

在@prashant答案的启发下,我尝试创建一个额外的配置文件,并将其注入以下内容: @PropertySource("classpath:config/alternate-ds.yml")

# alternate-ds.yml
app:
  datasource:
    alternate:
      schema-username: TEST

# AlternateDataSourceProperties.java
@ConfigurationProperties("app.datasource.alternate")
@PropertySource("classpath:config/alternate-ds.yml")
public class AlternateDataSourceProperties extends DataSourceProperties {}

我仍然得到 名词定义例外 现在仍然存在一个竞争的bean资源。有没有一种方法可以指定bean不应该自动连接?

2 回复 | 直到 7 年前

Prashant 7 年前

    public class WebApplication { 
       private static final String CONFIGURATION_FILE_NAME_KEY = "spring.config.name";
       private static final String CONFIGURATION_FILE_NAME_VALUE = new StringJoiner(",")
            .add("application")
            .add("aurora_web")
            .toString();
       private static final String CONFIGURATION_FILE_NAME_PROPERTY = MessageFormat.format("{0}:{1}", CONFIGURATION_FILE_NAME_KEY, CONFIGURATION_FILE_NAME_VALUE);

       public static void main(String[] args) {
        new SpringApplicationBuilder(WebApplication.class)
                .properties(CONFIGURATION_FILE_NAME_PROPERTY)
                .build()
                .run(args);
    }

spring.config.name application.[property|yml] @Value() following official documentation .

coderatchet 7 年前

@SpringBootTest 看来这个还可以。

autowire = Autowire.NO @Bean 自定义属性集的注释,但这仍然提供 NoUniqueBeanDefinitionException

问题是,春天不知道 DataSourceProperties 数据源属性 @豆子 @Primary

@Qualifier("alternateDataSourceProperties")

@Configuration
public class AlternateDataSourcePropertiesConfiguration {
   @Bean
    @ConfigurationProperties("app.datasource.alternate")
    public DataSourceProperties alternateDataSourceProperties() {
        return new DataSourceProperties();
    }

    @Bean
    @Primary
    @ConfigurationProperties("spring.datasource")
    public DataSourceProperties dataSourceProperties() {
        return new DataSourceProperties();
    }
}

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = NONE, properties={"app.datasource.alternate.schema-username=TEST",
"app.datasource.alternate.username=SOMETHING"})
@ActiveProfiles("test") // there is a default test datasource configured in application-test.properties so I can test that primary configuration is unaffected. i.e. I have a H2 datasource configured here with username 'sa'
public class AlternateDataSourcePropertiesConfigurationTest {

    @Autowired
    @Qualifier("alternateDataSourceProperties")
    private DataSourceProperties alternateDataSourceProperties;

    @Autowired
    private DataSourceProperties primaryDataSourceProperties;

    @Test
    public void propertiesAreInjected() {
        assertThat(alternateDataSourceProperties.getSchemaUsername()).isEqualTo("TEST");
    }

    @Test
    public void propertiesDontOverridePrimary() {
        assertThat(alternateDataSourceProperties.getUsername()).isEqualTo("SOMETHING");
        assertThat(primaryDataSourceProperties.getUsername()).isEqualTo("sa");
    }
}