如何处理SIGTERM

Question

Java中是否有办法处理收到的SIGTERM？

Answer 1

是的,你可以注册一个关机钩子Runtime.addShutdownHook().

Answer 2

您可以添加一个关闭钩子来进行任何清理.

像这样:

public class myjava{
    public static void main(String[] args){
        Runtime.getRuntime().addShutdownHook(new Thread() {
        @Override
            public void run() {
                System.out.println("Inside Add Shutdown Hook");
            }   
        }); 

        System.out.println("Shut Down Hook Attached.");

        System.out.println(5/0);     //Operating system sends SIGFPE to the JVM
                                     //the JVM catches it and constructs a 
                                     //ArithmeticException class, and since you 
                                     //don't catch this with a try/catch, dumps
                                     //it to screen and terminates.  The shutdown
                                     //hook is triggered, doing final cleanup.
    }   
}

然后运行它:

el@apollo:~$ javac myjava.java
el@apollo:~$ java myjava 
Shut Down Hook Attached.
Exception in thread "main" java.lang.ArithmeticException: / by zero
        at myjava.main(myjava.java:11)
Inside Add Shutdown Hook

Answer 3

在Java中处理信号的另一种方法是通过sun.misc.signal包.请参阅http://www.ibm.com/developerworks/java/library/i-signalhandling/以了解如何使用它.

注意: sun.*包中的功能也意味着它可能不是所有操作系统中的可移植/行为相同.但你可能想尝试一下.