java 程序管理脚本

#!/bin/bash
### java程序管理脚本
### 功能：启动、停止、重启、查看状态、查看日志
### 根据网上脚本改编而成。
###
### author : star
### date: 2019-12-30


#JDK所在路径
#JAVA_HOME="/home/dcenter/jdk1.8.0_91/bin/java"
#Java程序所在的目录（classes的上一级目录）
APP_HOME=$(dirname $(cd "$(dirname "$0")"; pwd))
cd ${APP_HOME}
#  日志写入位置
LOG_HOME="${APP_HOME}/logs"
LOG_FILE="poseidon-emos.log"
#  应用名
APP_NAME="poseidon-business-emos-server"
#  jar包名称
JAR_NAME="poseidon-business-emos-server-1.0.0.jar"
#  拼凑完整的路径
APP="${APP_HOME}/${JAR_NAME}"
## 判断日志目录是否存在，不存在则创建
if [ ! -d $LOGS_DIR ]; then
   mkdir $LOGS_DIR
fi

#java虚拟机启动参数
JAVA_OPTS=" -Dfile.encoding=UTF8 -Duser.timezone=GMT+08 -Xms4096M -Xmx4096M  -Djava.awt.headless=true "
#JAVA_OPTS=" -ms512m -mx512m -Xmn256m -Djava.awt.headless=true -XX:MaxPermSize=128m"
JAR=$APP
prog=$APP_NAME
psid=0

## 加载环境变量
source /etc/profile
source ~/.bash_profile

## 检查pid
checkpid() {
    javaps=`jps -l | grep $APP`

    if [ -n "$javaps" ]; then
        psid=`echo $javaps | awk '{print $1}'`
    else
        psid=0
    fi
}

## 启动程序
start() {
    checkpid
    addCron
    if [ $psid -ne 0 ]; then
        echo "================================"
        echo "warn: $APP_NAME already started! (pid=$psid)"
        echo "================================"
    else
        echo -n "Starting $APP_NAME ..."
#       nohup java  -jar $JAVA_OPTS $APP  >$LOG_HOME/$LOG_FILE  2>&1 &
        nohup java  -jar $JAVA_OPTS $APP  >/dev/null  2>&1 &
        checkpid
        if [ $psid -ne 0 ]; then
            echo "(pid=$psid) [OK]"
        else
            echo "[Failed]"
        fi
    fi
}

## 停止程序
stop() {
    checkpid
    delCron
    if [ $psid -ne 0 ]; then
        echo -n "Stopping $APP_NAME ...(pid=$psid) "
        kill -9 $psid
        if [ $? -eq 0 ]; then
            echo "[OK]"
        else
            echo "[Failed]"
        fi
            checkpid
        if [ $psid -ne 0 ]; then
            stop
        fi
    else
        echo "================================"
        echo "warn: $APP_NAME is not running"
        echo "================================"
    fi
}

## 重启程序
restart() {
    checkpid
    if [ $psid -ne 0 ];  then
    #      echo "$APP_NAME is running! (pid=$psid)"
        stop
        start
    else
    #      echo "$APP_NAME is not running"
        start
    fi
}

## 查看程序状态
status() {
    pid=$(ps -ef | grep $JAR | grep -v 'grep ' | awk '{print $2}')

    if [  -e $pid ];then
        echo -e $"$prog hasn't run\t\t[OK]"
    else
        echo -e $"$prog is running\t\t[OK]"
    fi
}

## 查询程序日志
log() {
    tail -111f $LOG_HOME/$LOG_FILE
}

## 将启动脚本加入crontab(每分钟执行一次),防止程序挂掉
addCron() {
    crontab=`crontab -l|grep $APP_HOME`
    if [ -n "$crontab" ];then
        echo "app crontab alrelady exist"
    else
        crontab -l > /tmp/${USER}crontab && echo "0 * * * * $APP_HOME/bin/app.sh start" >> /tmp/${USER}crontab && crontab /tmp/${USER}crontab && rm -f /tmp/${USER}crontab
        echo -e "add crontab\t\t[OK]"
    fi
}
delCron() {
crontab -l > /tmp/${USER}crontab |grep -v "$APP_NAME" >> /tmp/${USER}crontab && crontab /tmp/${USER}crontab && rm -f /tmp/${USER}crontab
        echo -e "add crontab\t\t[OK]"
}

if [ -z "$*" ]; then
    echo -e "Usage: $0 {start|stop|status|restart|log|addCron}"
else
    for order in $*
    do
        case "$order" in
            start)
                start
                ;;
            stop)
                stop
                ;;
            status)
                status
                ;;
            restart)
                restart
                ;;
            log)
                log
                ;;
            addCron)
                addCron
            delCron)
                delCron
                ;;
            *)
            echo -e "Usage: $0 {start|stop|status|restart|log|addCron|delCron}"
                exit 2
        esac
    done
fi