Springboot外部库Liquibase迁移

Question

我有一个外部 SpringBoot 公共库（构建为 ）jar和一个包含它的主项目。

外部库需要一组默认数据库表。为此，我设置了 Liquibase。主要项目还使用了 Liquibase。这两个项目都有不同的变更日志文件。假设一个被命名library.xml，另一个被命名main.xml。所有数据库和 Liquibase 属性均在主项目（以及spring.liquibase.change-log=main.xml）中配置。

该库有一个属性：spring.liquibase.change-log=library.xml。

我如何告诉 Liquibase“同时运行library.xml并且main.xml”？我想我需要在库项目中配置一些东西，因为主应用程序应该按原样使用它（只需导入和使用它）。

Answer 1

要合并/构建我们的（liquibase）更改日志，我们可以：

1. 使用（liquibase）include “属性”（等）。（我还是更喜欢这个！）
2. （使用spring）定义多个 @Bean SpringLiquibases：
   • 正如此处所示的简单（调整后的副本如下）。
   • 或者（也停用，但是）利用spring-boot 自动配置......

Spring-Boot（2.7.5）解决方案：

（主要项目）application.properties：

spring.liquibase.change-log=classpath:/main.xml
# many more with same prefix ...
lib.liquibase.change-log=classpath:/library.xml
# according for lib.liquibase.* ...

主/配置类：

@SpringBootApplication(/* scanBasePackages = "com.example.lib" */)
// We need/want these:
@EnableConfigurationProperties(LiquibaseProperties.class)
public class Demo {

  @Bean // "main" liquibase: 
  // when order matters: @DependsOn("liquibaseLib") 
  @ConfigurationProperties("spring.liquibase") // !
  public SpringLiquibase liquibase( 
      ObjectProvider<DataSource> dataSource,
      @LiquibaseDataSource ObjectProvider<DataSource> liquibaseDataSource,
      LiquibaseProperties properties) {
    return liqui(dataSource, liquibaseDataSource, properties);
  }

  @Bean // lib liquibase:
  @ConfigurationProperties("lib.liquibase")
  public SpringLiquibase liquibaseLib(
      ObjectProvider<DataSource> dataSource,
      /* alternatively: @MyVeryCustomDataSource ... */
      @LiquibaseDataSource ObjectProvider<DataSource> liquibaseDataSource,
      LiquibaseProperties properties) {
    return liqui(dataSource, liquibaseDataSource, properties);
  }

  // pstvm...

  private SpringLiquibase liqui(ObjectProvider<DataSource> dataSource,
      ObjectProvider<DataSource> liquibaseDataSource, LiquibaseProperties properties) {
    // trick: Don't use LiquibaseConfiguration as `@Configuration/Bean`
    // , it is not "repeatable" (in regards of liquibase execution;(
    // , but rather as a "utility object"/factory:
    LiquibaseConfiguration helpr = new LiquibaseConfiguration(properties);
    return helpr.liquibase(dataSource, liquibaseDataSource);
  }
}

Demo.java 的标头（包+导入）：

package com.example.app;import javax.sql.DataSource; import liquibase.integration.spring.SpringLiquibase; import org.springframework.beans.factory.ObjectProvider; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration.LiquibaseConfiguration; import org.springframework.boot.autoconfigure.liquibase.LiquibaseDataSource; import org.springframework.boot.autoconfigure.liquibase.LiquibaseProperties; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.boot.context.properties.EnableConfigurationProperties; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.DependsOn;

也可以看看。

简单的解决方案

...如2所示：

@SpringBootApplication(/* scanBasePackages = "com.example.lib" */)
// We need/want these:
@EnableConfigurationProperties(LiquibaseProperties.class)
public class Demo {

  @Bean // "main" liquibase: 
  // when order matters: @DependsOn("liquibaseLib") 
  @ConfigurationProperties("spring.liquibase") // !
  public SpringLiquibase liquibase( 
      ObjectProvider<DataSource> dataSource,
      @LiquibaseDataSource ObjectProvider<DataSource> liquibaseDataSource,
      LiquibaseProperties properties) {
    return liqui(dataSource, liquibaseDataSource, properties);
  }

  @Bean // lib liquibase:
  @ConfigurationProperties("lib.liquibase")
  public SpringLiquibase liquibaseLib(
      ObjectProvider<DataSource> dataSource,
      /* alternatively: @MyVeryCustomDataSource ... */
      @LiquibaseDataSource ObjectProvider<DataSource> liquibaseDataSource,
      LiquibaseProperties properties) {
    return liqui(dataSource, liquibaseDataSource, properties);
  }

  // pstvm...

  private SpringLiquibase liqui(ObjectProvider<DataSource> dataSource,
      ObjectProvider<DataSource> liquibaseDataSource, LiquibaseProperties properties) {
    // trick: Don't use LiquibaseConfiguration as `@Configuration/Bean`
    // , it is not "repeatable" (in regards of liquibase execution;(
    // , but rather as a "utility object"/factory:
    LiquibaseConfiguration helpr = new LiquibaseConfiguration(properties);
    return helpr.liquibase(dataSource, liquibaseDataSource);
  }
}

关于：

图书馆有一个单一的财产...

我希望这是一个测试属性；）！