[ISSUE-456][fix][dlink-doc] Fix start and stop conflicts

 start and stop dlink progress through PID file.

dlink-doc/bin/auto.sh

@@ -6,18 +6,35 @@ JAR_NAME="./dlink-admin-*.jar"
 # 如果需要将FLINK依赖直接加入启动脚本，在SETTING中增加$FLINK_HOME/lib
 SETTING="-Dloader.path=./lib,./plugins -Ddruid.mysql.usePingMethod=false"
 
-if [ ! -d ${HADOOP_HOME} ];then
+if [ ! -d ${HADOOP_HOME} ]; then
   echo 'WARNING!!!...not find HADOOP_HOME for CLASSPATH.'
 else
   export HADOOP_HOME="${HADOOP_HOME}"
 fi
 
+PIDFILE="dink.pid"
+#检查PID path 是否存在
+PIDPATH="$(cd "$(dirname "$0")";pwd)/run"
+if [ -d ${PIDPATH} ];then
+    echo "${PIDPATH} is already exist" >> /dev/null
+else
+    #echo "create ${PIDPATH}"
+    mkdir -p  ${PIDPATH}
+fi
+
+#检查PID File 是否存在
+if [ -f "${PIDPATH}/${PIDFILE}" ];then
+    echo "${PIDPATH}/${PIDFILE} is already exist" >> /dev/null
+else
+    touch ${PIDPATH}/${PIDFILE}
+fi
+
 # 首次启动时候自动创建plugins文件夹和引用flink\lib包！
-if [ ! -d "./plugins" ];then
-echo 'mkdir plugins now'
-mkdir plugins
-cd plugins
-  if [ ! -d ${FLINK_HOME} ];then
+if [ ! -d "./plugins" ]; then
+  echo 'mkdir plugins now'
+  mkdir plugins
+  cd plugins
+  if [ ! -d ${FLINK_HOME} ]; then
     echo 'WARNING!!!...没有找到FLINK_HOME环境变量，无法引用Flink/lib到plugins，请手动引用或复制Flink jar到plugins文件夹'
     echo 'WARNING!!!...not find FLINK_HOME environment variable to reference Flink/lib to plugins, please reference or copy Flink jar to the plugins folder manually!!'
   else
@@ -37,45 +54,36 @@ tips() {
 
 # 启动方法
 start() {
-        # 重新获取一下pid，因为其它操作如stop会导致pid的状态更新
-	pid=`ps -ef | grep $JAR_NAME | grep -v grep | awk '{print $2}'`
-        # -z 表示如果$pid为空时执行
+
+  pid=$(cat ${PIDPATH}/${PIDFILE})
   if [ -z $pid ]; then
-        nohup java $SETTING -jar -Xms512M -Xmx2048M -XX:PermSize=512M -XX:MaxPermSize=1024M $JAR_NAME > dlink.log 2>&1 &
-        pid=`ps -ef | grep $JAR_NAME | grep -v grep | awk '{print $2}'`
-		echo ""
-        echo "Service ${JAR_NAME} is starting！pid=${pid}"
-		echo "........................Start successfully！........................."
+    nohup java $SETTING -jar -Xms512M -Xmx2048M -XX:PermSize=512M -XX:MaxPermSize=1024M $JAR_NAME >dlink.log 2>&1 &
+    echo $! >${PIDPATH}/${PIDFILE}
+    echo "........................................Start Dlink Successfully........................................"
+
   else
-		echo ""
-		echo "Service ${JAR_NAME} is already running,it's pid = ${pid}. If necessary, please use command: sh auto.sh restart."
-		echo ""
+    echo "Dlink pid $pid is in ${PIDPATH}/${PIDFILE}, Please stop first !!!"
   fi
 }
 
 # 停止方法
 stop() {
-		# 重新获取一下pid，因为其它操作如start会导致pid的状态更新
-	pid=`ps -ef | grep $JAR_NAME | grep -v grep | awk '{print $2}'`
-        # -z 表示如果$pid为空时执行。 注意：每个命令和变量之间一定要前后加空格，否则会提示command找不到
+  pid=$(cat ${PIDPATH}/${PIDFILE})
   if [ -z $pid ]; then
-		echo ""
-        echo "Service ${JAR_NAME} is not running! It's not necessary to stop it!"
-		echo ""
+    echo "Dlink pid is not exist in ${PIDPATH}/${PIDFILE}"
   else
     kill -9 $pid
-		echo ""
-		echo "Service stop successfully！pid:${pid} which has been killed forcibly!"
-		echo ""
+    sleep 1
+    echo "........................................Stop Dlink Successfully....................................."
+    echo " " >${PIDPATH}/${PIDFILE}
   fi
 }
 
 # 输出运行状态方法
 status() {
   # 重新获取一下pid，因为其它操作如stop、restart、start等会导致pid的状态更新
-	pid=`ps -ef | grep $JAR_NAME | grep -v grep | awk '{print $2}'`
-        # -z 表示如果$pid为空时执行。注意：每个命令和变量之间一定要前后加空格，否则会提示command找不到
-	if [ -z $pid ];then
+  pid=$(cat ${PIDPATH}/${PIDFILE})
+  if [ -z $pid ]; then
     echo ""
     echo "Service ${JAR_NAME} is not running!"
     echo ""
@@ -89,34 +97,26 @@ status() {
 # 重启方法
 restart() {
   echo ""
-	echo ".............................Restarting.............................."
-	echo "....................................................................."
-		# 重新获取一下pid，因为其它操作如start会导致pid的状态更新
-	pid=`ps -ef | grep $JAR_NAME | grep -v grep | awk '{print $2}'`
-        # -z 表示如果$pid为空时执行。 注意：每个命令和变量之间一定要前后加空格，否则会提示command找不到
-	if [ ! -z $pid ]; then
-		kill -9 $pid
-	fi
+  stop
   start
-	echo "....................Restart successfully！..........................."
+  echo "........................................Restart Successfully........................................"
 }
 
 # 根据输入参数执行对应方法，不输入则执行tips提示方法
 case "$1" in
-   "start")
+"start")
   start
   ;;
-   "stop")
+"stop")
   stop
   ;;
-   "status")
+"status")
   status
   ;;
-   "restart")
+"restart")
   restart
   ;;
-   *)
+*)
   tips
   ;;
 esac
-