[英]Is it possible to disable an autoconfiguration class from another autoconfiguration class in spring boot?
[英]Extending DataSource with a sub class in Spring Boot AutoConfiguration
我正在嘗試編寫一個自動配置庫,為任何DataSource
添加功能。 我編寫了一個子類,我將在這里調用CustomDataSource
並覆蓋DataSource
的一些方法。
@Configuration
@ConditionalOnBean(DataSource.class)
@AutoConfigureAfter(DataSourceAutoConfiguration.class)
public class CustomDataSourceAutoConfiguration {
private final DataSource dataSource;
public CustomDataSourceAutoConfiguration(DataSource dataSource) {
this.dataSource = dataSource;
}
@Primary
@Bean
public CustomDataSource customDataSource() {
return new CustomDataSource(dataSource);
}
}
但我找不到讓我做我想做的事的方法。 它總是會導致循環引用和異常:
BeanCurrentlyInCreationException: Error creating bean with name 'customDataSource': Requested bean is currently in creation: Is there an unresolvable circular reference?
有沒有解決的辦法?
我找到了一種通過實現BeanPostProcessor
來解決此問題的方法:
public class DataSourcePostProcessor implements BeanPostProcessor {
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) {
if (bean instanceof DataSource && !(bean instanceof CustomDataSource)) {
return new CustomDataSource((DataSource) bean);
} else {
return bean;
}
}
}
postProcessAfterInitialization
方法可以顯式用於將 bean 包裝在代理中,引用BeanPostProcessor
文檔:
[...] 使用代理包裝 bean 的后處理器通常會實現
postProcessAfterInitialization(java.lang.Object, java.lang.String)
。
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