由于这
DataSource是类的私有内容，并且包含类的内容 可以
在Spring上下文中，因此您可以拥有一个
@ConfigurationProperties类
@ConfigurationProperties("com.foo.bar.datasource.hikari")public class HikariConfiguration { ... }通过进行注册
@EnableConfigurationProperties，可用于自动装配
@EnableConfigurationProperties(HikariConfiguration.class)@SpringBootApplicationpublic class Application { ... }因此可以在包含类中自动接线
@Componentclass MyClass { private final HikariConfiguration hikariConfiguration; private DataSource springDatasource; MyClass(final HikariConfiguration hikariConfiguration) { this.hikariConfiguration = hikariConfiguration; } ... private DataSource privateSingletonDataSource() { if (Objects.isNull(this.springDatasource)) { this.springDatasource = buildDataSource(this.hikariConfiguration); } return this.springDatasource; }}buildDataSource将 手动 构造
DataSource实例。
请记住，构建时需要注意同步
DataSource。
最后的回应是您不能重复使用
DataSourceProperties。您甚至无法扩展它来更改属性的前缀。在上下文中只能存在一个实例。
您可以做的最好的事情就是模仿Spring的工作。
有
com.non.exposed.datasource.hikari.url=testUrlcom.non.exposed.datasource.hikari.username=testUsernamecom.non.exposed.datasource.hikari.password=testPassword...
您可以定义一个新
@ConfigurationProperties类
@ConfigurationProperties("com.non.exposed.datasource")public class NonExposedProperties { private final Map<String, String> hikari = new HashMap<>(8); public Map<String, String> getHikari() { return hikari; }}然后，将此属性类自动连接到您的
@Configuration/
@Component类中。
遵循代码中的注释。
@Configurationpublic class CustomConfiguration { private final NonExposedProperties nonExposedProperties; private DataSource dataSource; CustomConfiguration(final NonExposedProperties nonExposedProperties) { this.nonExposedProperties= nonExposedProperties; } public DataSource dataSource() { if (Objects.isNull(dataSource)) { // Create a standalone instance of DataSourceProperties final DataSourceProperties dataSourceProperties = new DataSourceProperties(); // Use the NonExposedProperties "hikari" Map as properties' source. It will be // { // url -> testUrl // username -> testUsername // password -> testPassword // ... other properties // } final ConfigurationPropertySource source = new MapConfigurationPropertySource(nonExposedProperties.getHikari()); // Bind those properties to the DataSourceProperties instance final BindResult<DataSourceProperties> binded = new Binder(source).bind( ConfigurationPropertyName.EMPTY, Bindable.ofInstance(dataSourceProperties) ); // Retrieve the binded instance (it's not a new one, it's the same as before) dataSource = binded.get().initializeDataSourceBuilder().build(); } // Return the constructed HikariDataSource return dataSource; }}
