Spring Boot下通过EntityManagerFactoryDependsOnPostProcessor来确保Flyway的初始化执行晚于JPA。但是有时候我们会希望由JPA完成表结构的维护，Flyway用来修数据、基础数据的维护。这个时候如果flyway执行早于JPA的表结构维护，可能会导致表或字段不存在的异常。
所以我们重新实现FlywayMigrationStrategy的逻辑，在正常migrate时，不做具体事情，把flyway保存下来，在Spring完成初始化后ContextRefreshedEvent再执行migrate。
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package org.xobo.configuration; import org.flywaydb.core.Flyway; import org.springframework.boot.autoconfigure.flyway.FlywayMigrationStrategy; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.event.ContextRefreshedEvent; import org.springframework.context.event.EventListener; @Configuration public class MigrationConfiguration { public static class MyFlywayMigrationStrategy implements FlywayMigrationStrategy { private Flyway flyway; private boolean hasMigrated; public MyFlywayMigrationStrategy() { } @Override public void migrate(Flyway flyway) { this.flyway = flyway; } @EventListener public void handleContextRefresh(ContextRefreshedEvent event) { if (!hasMigrated && flyway != null) { flyway.migrate(); hasMigrated = true; } } } @Bean FlywayMigrationStrategy FlywayMigrationStrategy() { return new MyFlywayMigrationStrategy(); } } |
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