使用Spring Boot的Spring Data Connection（二級連接）

Question

我需要連接到數據庫A的登錄憑據存儲在其他數據庫B中。

如何從數據庫B檢索那些憑證並連接到數據庫A？

我需要通過Springboot實現

Answer 1

您必須使用兩個數據源。 看看下面的帖子，它對我有幫助

https://medium.com/@joeclever/using-multiple-datasources-with-spring-boot-and-spring-data-6430b00c02e7

主要思想是創建兩個數據源配置，並將它們指向相應的包：

package com.foobar;


@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
  entityManagerFactoryRef = "entityManagerFactory",
  basePackages = { "com.foobar.foo.repo" }
)
public class FooDbConfig {

  @Primary
  @Bean(name = "dataSource")
  @ConfigurationProperties(prefix = "spring.datasource")
  public DataSource dataSource() {
    return DataSourceBuilder.create().build();
  }

  @Primary
  @Bean(name = "entityManagerFactory")
  public LocalContainerEntityManagerFactoryBean 
  entityManagerFactory(
    EntityManagerFactoryBuilder builder,
    @Qualifier("dataSource") DataSource dataSource
  ) {
    return builder
      .dataSource(dataSource)
      .packages("com.foobar.foo.domain")
      .persistenceUnit("foo")
      .build();
  }

  @Primary
  @Bean(name = "transactionManager")
  public PlatformTransactionManager transactionManager(
    @Qualifier("entityManagerFactory") EntityManagerFactory 
    entityManagerFactory
  ) {
    return new JpaTransactionManager(entityManagerFactory);
  }
}