一个通用的java应用程序启动shell脚本

#!/bin/sh
current_path=pwd
case "uname" in
    Linux)
      bin_abs_path=$(readlink -f $(dirname $0))
      ;;
   *)
      bin_abs_path=cd $(dirname $0); pwd
      ;;
esac
base=${bin_abs_path}/..
export LANG=en_US.UTF-8
export USER_CLASSPATH=$USER_CLASSPATH:$base/conf
if [ -f $base/bin/worker.pid ] ; then
   echo "found worker.pid , Please run stop.sh first ,then startup.sh" 2>&2
    exit 1
fi
for f in $base/lib/*.jar; do
  if [ "$USER_CLASSPATH" ]; then
    export USER_CLASSPATH=$USER_CLASSPATH:$f
  else
    export USER_CLASSPATH=$f
  fi
done
USER_OPTION=-Duser.dir=$base
JAVA_OPTS="-server -Xms512m -Xmx512m -Xmn128m -XX:SurvivorRatio=2 -XX:PermSize=16m -XX:MaxPermSize=32m -Xss256k -XX:-UseAdaptiveSizePolicy -XX:MaxTenuringThreshold=15 -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -XX:+HeapDumpOnOutOfMemoryError"
WORKER_OPTS="-DappName=jbus-worker"
echo $base
java $JAVA_OPTS -cp $USER_CLASSPATH $USER_OPTION $WORKER_OPTS cn.outofmemory.worker.Main >> $base/logs/worker.log 2>&1 &
echo $! > $base/bin/worker.pid
cat worker.pid | xargs echo "worker start... "</pre>