如何處理SIGTERM

Question

Java中有處理收到的SIGTERM的方法嗎？

Answer 1

是的，你可以用Runtime.addShutdownHook()註冊關機鉤。

Answer 2

你可以添加一個shutdown hook做任何清理。

像這樣：

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. 
    } 
} 

然後運行它：

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

另一種方式來處理信號Java是通過sun.misc.signal包。瞭解如何使用它，請參閱http://www.ibm.com/developerworks/java/library/i-signalhandling/。

注意： sun。*軟件包中的功能也意味着它可能在所有操作系統中都不可移植/行爲相同。但你可能想嘗試一下。