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:
-
./jsvc -help Usage: 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' -client use a client Java Virtual Machine. -server use 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 set the JAVA_HOME environment variable) -version show the current Java environment version (to check correctness of -home and -jvm. Implies -nodetach) -showversion show the current Java environment version (to check correctness of -home and -jvm) and continue execution. -nodetach don'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:
-
#!/bin/bash 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 #echo $CLASSPATH 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