linux-tutorial/codes/linux/build/java-app-boot.sh

#!/usr/bin/env bash

#################################################################################
# JAVA 应用通用启动脚本
# @author: Zhang Peng
#################################################################################

# 检查脚本参数，如必要参数未传入，退出脚本。
function checkInput() {
    if [ "${app}" == "" ] || [ "${oper}" == "" ] || [ "${javaArgs}" == "" ] || [ "${classpathArgs}" == "" ] || [ "${bootstrapClass}" == "" ]; then
        echo "请输入脚本参数：app oper javaArgs classpathArgs bootstrapClass"
        echo "    app: 应用名。"
        echo "    oper: 运行环境（必填）。可选值：start|stop|restart"
        echo "    javaArgs: JVM 参数（必填）。"
        echo "    classpathArgs: classpath参数（必填）。"
        echo "    bootstrapClass: 启动类（必填）。"
        exit 0
    fi
}

# 检查文件夹是否存在，不存在则创建
function createFolderIfNotExist() {
    if [ ! -d "$1" ]; then
        mkdir -p "$1"
    fi
}

# 检查服务是否已经启动
pids=""
function checkStarted() {
    pids=`ps -ef | grep java | grep ${app} | awk '{print $2}'`
    if [ -n "${pids}" ]; then
        return 0
    else
        return 1
    fi
}

function main() {
    case "${oper}" in
        start)
            echo -n "starting server: "
            # 检查服务是否已经启动
            if checkStarted; then
                echo "ERROR: server already started!"
                echo "PID: ${pids}"
                exit 1
            fi

            args="${javaArgs} -classpath ${classpathArgs} ${bootstrapClass}"
            echo -e "statup params:\n ${args}"

            #启动服务
            touch ${LOG_DIR}/${app}-startup.log
            nohup java ${args} > ${LOG_DIR}/${app}-startup.log 2>&1 &
            # echo -e "执行参数：\n${args}"
            echo -e "\nthe server is started..."
        ;;
        stop)
            echo -n "stopping server: "
            #dubbo提供优雅停机, 不能使用kill -9
            if checkStarted; then
                kill ${pids}
                echo -e "\nthe server is stopped..."
            else
                echo -e "\nno server to be stopped..."
            fi
        ;;
        restart)
            $0 ${app} stop "${javaArgs}" "${classpathArgs}" "${bootstrapClass}"
            sleep 5
            $0 ${app} start "${javaArgs}" "${classpathArgs}" "${bootstrapClass}"
        ;;
        *)
            echo "Invalid oper: ${oper}."
            exit 1
    esac

    exit 0
}

######################################## MAIN ########################################
# 设置环境变量
export LANG="zh_CN.UTF-8"

# 获取输入参数
app=`echo $1`
oper=`echo $2`
javaArgs=`echo $3`
classpathArgs=`echo $4`
bootstrapClass=`echo $5`
vars=$*
checkInput

# 设置全局常量
LOG_DIR=/home/zp/log
createFolderIfNotExist ${LOG_DIR}

# 执行 main 方法
main