在分布式环境开发中经常会使用socket，或者使用rmi来对外提供服务，常用的办法是将写一个java代码，然后部署到服务器上，但是问题来了。如何将这个服务成为一个可靠的系统服务，不会应为风吹草动就挂了，那就不好了。所以想到使用apache commons 下面的daemon框架来充当守护进程。首先需要在系统中安装jsvc工具具体操作方法这里不作详细说明，请查看 http://commons.apache.org/daemon/jsvc.html
。最后jsvc安装成功之后需要有执行 jsvc -help 会显示以下内容：
Python代码
./jsvc -helpUsage: jsvc [-options]
class [args…] Where options include: -help | –help | -?show this help page (implies -nodetach)-jvm <JVM name>use a specific Java Virtual Machine. Available JVMs:
‘client’ ‘server’-clientuse a client Java Virtual Machine.-serveruse a server Java Virtual Machine.-cp / -classpath <directories
and zip/jar files>set search path
for service classes
and resouces-home <directory>set the path of your JDK
or JRE installation (
or setthe JAVA_HOME environment variable)-versionshow the current Java environment version (to checkcorrectness of -home
and -jvm. Implies -nodetach)-showversionshow the current Java environment version (to checkcorrectness of -home
and -jvm)
and continue execution.-nodetachdon’t detach
from parent process
and become a daemon
-debug
另外需要编写一个shell脚本，来控制该系统服务启动或者停止，详细请操作如下脚本：
Python代码
CLASSPATH=./trigger-server/terminator-job-trigger-server-
3.1.
0-SNAPSHOT.jar
for P
in ls -F ./trigger-server/dependency/
do
CLASSPATH=$CLASSPATH:./trigger-server/dependency/$P
done
export JAVA_HOME=/opt/taobao/java
start(){
echo
“starting”
/home/baisui/commons-daemon-
1.0.
10-native-src/unix/jsvc -pidfile ./pidfile.pid -outfile ./logs/trigger_server_out.log -errfile ./logs/trigger_server_err.log -cp $CLASSPATH com.taobao.terminator.trigger.LaunchServer
echo
“start successful”
}
stop(){
/home/baisui/commons-daemon-
1.0.
10-native-src/unix/jsvc -stop -pidfile ./pidfile.pid -cp $CLASSPATH com.taobao.terminator.trigger.LaunchServer
echo
“trigger_server stopped”
}
case
“$1” in
start)
start
;;
stop)
stop
;;
restart)
stop
start
;;
*)
usage
;;
esac
这样可以使用一下脚本来控制系统服务的状态了：
sh start.sh start 启动服务
sh start.sh stop 停止服务
sh start.sh restart 重启服务
本文来源于"阿里中间件团队播客",原文发表时间" 2012-09-20 "
