Spring-boot：在不启动应用程序的情况下运行flyway迁移

Question

我们有一个 Spring Boot 服务，可以进行 Flyway 迁移，并且一切正常。现在，对于新的部署用例，问题是是否有一个 java 选项（参数或类似的东西）来仅启动 Flyway 迁移而不启动实际服务。

Answer 1

这对我来说很有用；

import static org.springframework.boot.WebApplicationType.NONE;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.SpringBootConfiguration;

import org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration;

import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;

import org.springframework.boot.builder.SpringApplicationBuilder;

import org.springframework.context.annotation.Import;

/**

 * Utility to run flyway migration without starting service

 */

@SpringBootConfiguration

@Import({DataSourceAutoConfiguration.class, FlywayAutoConfiguration.class})

public class FlywayMigrationRunner {

public static void main(String[] args) {

SpringApplication application =

    new SpringApplicationBuilder(FlywayMigrationRunner.class)

        .web(NONE).build();

    application.run(args);

  }

}

中等链接

Answer 2

基本上，我自己通过利用 Flyway 回调来实现它，并在迁移成功完成后简单地关闭应用程序。整个过程由一个单独的配置参数控制。

这是回调

public class PostMigrationCallback implements Callback {

  private final FlywayCustomProperties flywayCustomProperties;

  private final ApplicationContext applicationContext;

  public PostMigrationCallback(FlywayCustomProperties flywayCustomProperties, ApplicationContext applicationContext) {

    this.flywayCustomProperties = flywayCustomProperties;

    this.applicationContext = applicationContext;

  }

  @Override

  public boolean supports(Event event, Context context) {

    if (event.getId().equalsIgnoreCase("afterMigrate") && flywayCustomProperties.isMigrationOnly()) {

      log.info("Service is going to shutdown as configuration was set to spring.flyway.migrate-only=true and schema was migrated successfully");

      int exitCode = SpringApplication.exit(applicationContext, () -> 0);

      System.exit(exitCode);

    }

    return false;

  }

  @Override

  public boolean canHandleInTransaction(Event event, Context context) {

    return false;

  }

  @Override

  public void handle(Event event, Context context) {

  }

}

这里我们有配置参数

@Data

@Validated

@ConfigurationProperties(prefix = "spring.flyway")

public class FlywayCustomProperties {

  @NotNull

  private boolean migrationOnly;

}

Answer 3

是的，您可以使用 Flyway cli 来运行迁移，而无需启动服务： https ://flywaydb.org/documentation/commandline/