如何让Java应用成为杀不死的小强?(下篇)



如何让Java应用成为杀不死的小强?(下篇)

各位坐稳扶好,我们要开车了。不过在开车之前,我们还是例行回顾一下上期分享的要点。


经过前两期的铺垫及烧脑的分享,我们大概对「如何实现 Java 应用进程的状态监控,如果被监控的进程 down 掉,是否有机制能启动起来?」问题本身有了一个新的认识,那这期我们不妨拿出攻城狮的绝招 Ctrl + C、Ctrl + V,从 Resin 源码中摘取一二,稍微简单实践一下。



按照图示,咱们先演示一下实践效果吧,首先找到并运行程序入口 MonitorApp,日志输出如下。


此时我们不妨在控制台输入 jps 命令,看一看效果。


18830 MonitorApp

18831 Resin


发现成功启动了 MonitorApp、Resin 两个进程,和 Resin 应用服务器是一模一样的,如果我们把进程号为 18831 的 kill 掉,会是什么效果?发现控制台日志输出又多了一些,貌似丫鬟 Resin 又被重新给启动了。


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