Kotlin 以编程方式重新启动 Spring Boot 应用程序刷新 Spring 上下文

尽管Alex的解决方案是works，但我不相信仅仅为了一个操作就包含两个额外的依赖项(Actuator和Cloud Context).相反，我结合了他的答案，修改了我的代码，以便做我想做的事情.

首先，使用new Thread()和setDaemon(false);执行代码是crucial.我有以下端点方法来处理重启:

val restartThread = Thread {
    logger.info("Restarting...")
    Thread.sleep(1000)
    SpringMain.restartToMode(AppMode.valueOf(change.newMode.toUpperCase()))
    logger.info("Restarting... Done.")
}
restartThread.isDaemon = false
restartThread.start()

The Thread.sleep(1000) is not required, but I want my controller to output the view before actually restarting the application.

SpringMain.restartToMode具有以下特点:

@Synchronized fun restartToMode(mode: AppMode) {
    requireNotNull(context)
    requireNotNull(application)

    // internal logic to potentially produce a new arguments array

    // close previous context
    context.close()

    // and build new one using the new mode
    val builder = SpringApplicationBuilder(SpringMain::class.java)
    application = builder.application()
    context = builder.build().run(*argsArray)
}

其中context和application来自启动应用程序时的main方法:

val args = ArrayList<String>()
lateinit var context: ConfigurableApplicationContext
lateinit var application: SpringApplication

@Throws(Exception::class)
@JvmStatic fun main(args: Array<String>) {
    this.args += args

    val builder = SpringApplicationBuilder(SpringMain::class.java)
    application = builder.application()
    context = builder.build().run(*args)
}

I am not entirely sure if this produces any problems. If there will be, I will update this answer. Hopefully this will be of any help to others.