使用bash脚本在Java应用程序的信号捕获初始化
问题说明
我用下面的code追赶Java中的INT信号：
I am catching an INT signal in java using the following code:
Signal.handle(new Signal("INT"), new SignalHandler () {
public void handle(Signal sig) {
log.warn("Received SIGINT signal. Will teardown.");
task.tearDown();
// Force exit anyway
System.exit(1);
}
});
当我使用 Java的罐子file.jar 启动我的应用程序能赶上送与信号杀死-INT PID 。
When I am using java -jar file.jar to start my application I can catch the signal sent with with kill -INT PID.
如果我称之为 Java的罐子file.jar＆安培; （JVM在后台运行），我不能赶上与发送的信号杀-INT 。
If I call java -jar file.jar & (jvm runs in the background), I can't catch the signal sent with kill -INT.
任何想法？
感谢。
正确答案
我的作品。你确定你正在扼杀正确的PID？在Unix上你可以使用 $！让你推出的最后进程的PID。
Works for me. Are you sure you are killing the right pid? On Unix you can use $! to get the pid of the last process you launched.
$ java -jar file.jar &
[1] 25573
$ kill -INT $!
Received SIGINT signal. Will teardown.
更新：
如果您在通过shell脚本在后台启动此，操作系统将创建这将是免疫键盘产生的信号，例如SIGINT一个新的进程组。只有其进程组ID匹配当前终端的进程组ID可以接收这些信号。
If you are launching this in the background via a shell script, the OS will create a new process group which will be immune to keyboard-generated signals such as SIGINT. Only processes whose process group ID matches the current terminal's process group ID can receive these signals.
因此，尝试这样当前终端的进程组中运行它：
So try running it within the current terminal's process group like this:
. ./script.sh
您届时可发送SIGINT。
You will then be able to send SIGINT.
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