英文:
SpringBoot application without a rest controller
问题
我对Spring还不熟悉，目前正在开发一个Spring应用程序来在两个数据库之间进行数据迁移。
我的问题是，它将如何运行？我的意思是，如何使用Spring让Spring知道迁移过程将从哪里开始？
例如，假设我有3个表（Customer，Product和Invoices）。
我将首先处理迁移所有客户数据的类，然后是产品，最后是发票。
我对Spring在启动时如何管理这一点感到困惑。
提前感谢。
英文:
i´m new to spring and i´m currently working on a spring application to migrate data between 2 databases.
My question is, how is it going to run?? I mean, using spring, how to let spring knows where the migration process will start?
For example, assuming that i have 3 tables (Customer, Product and Invoices).
I´ll work on the classes to migrate first all data from customer, then product and finally invoices.
I´m confused on how spring will manage this when it starts.
Tks in advance.
答案1
得分: 0
正如@Marged建议的那样，CommandLineRunner应用程序将刚好实现您要寻找的功能：
@SpringBootApplication
public class YourMigrationApplication implements CommandLineRunner {
public static void main(String[] args) {
// 应用程序启动
SpringApplication.run(SpringBootConsoleApplication.class, args);
// 迁移完成
}
@Override
public void run(String... args) {
// 迁移客户数据
// 迁移产品数据
// 迁移发票数据
}
}
当迁移发票数据步骤完成时，您的应用程序将退出，因为没有其他任务需要运行。（您也没有控制器等继续监听的内容）。
英文:
As @Marged suggested, A CommandLineRunner application would just achieve what you're looking for:
@SpringBootApplication
public class YourMigrationApplication implements CommandLineRunner {
public static void main(String[] args) {
// Application starts
SpringApplication.run(SpringBootConsoleApplication.class, args);
// Migration finished
}
@Override
public void run(String... args) {
// Migrate Customer data
// Migrate Product data
// Migrate Invoice data
}
}
When the migrate invoice data step completes, your application will exit since there's nothing left to run. (And you don't have any controllers etc. to continue listen to).
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