Linux上控制Tomcat定时启动关闭

2018-01-04

应用部署后发现一个诡异的现象，虽通过定时器控制了应用执行时间，但是因代码中使用异步的方式去执行任务，导致代码出现不可控行为：推送消息会在凌晨发出

定时调度配置：

<!-- rss定时抓取 -->
    <bean id="rssJSHBScheduleCronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">  
        <property name="jobDetail">  
            <ref bean="rssJSHBScheduleJobDetail" />
        </property>  
        <property name="startDelay" value="15000"></property>
        <!-- 每天8:00到18:00每隔35分钟执行 -->
       <property name="cronExpression" value="0 0/35 8-18 * * ? *" />
    </bean>

被调用的推送消息的内部类（伪码）：

class RssServiceJShbNotice extends Thread
{
    public void run(){
    try{
      ArticleMessage message = new ArticleMessage();
      
      String title = "【新】通知公告";
      String content = "";
      for (String n_title : newNotice) {
        content = content + n_title + "<br/>";
      }
      
       Article article = new Article(title, content, null, null, launchApp);
	   message.addArticle(article);
	   AppAccount account=AppAccount.loginByAccessToken(platform_ip, access_token);  			              account.sendOcuMessageToUsers(null, message, ocu_id, ocu_secret);
    }catch (Exception e){
      log.error("推送消息报错了==================================push");
      e.printStackTrace();
    }
  }
}

修正办法

把消息推送改为同步
为避免程序被触发，直接关闭在早上7点再启动

Linux上定时关闭和启动Tomcat

启停脚本：

#!/bin/sh

#定义环境变量
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
export JAVA_HOME=/usr/lib/jvm/java-7-oracle
export CLASSPATH=$JAVA_HOME/lib:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin
# 获取tomcat进程ID
TomcatID=$(ps -ef |grep tomcat |grep -w '/home/ubuntu/tomcat/apache-tomcat-7.0.73'|grep -v 'grep'|awk '{print $2}')
# tomcat启动程序
StartTomcat=/home/ubuntu/tomcat/apache-tomcat-7.0.73/bin/startup.sh

echo "[info]脚本关闭tomcat...[$(date +'%F %H:%M:%S')]"
#判断tomcat进程是否存在
if [ $TomcatID ]
then
    echo "[info]当前tomcat进程ID为:$TomcatID"
    echo "[info]杀掉tomcat进程"
        kill -9 $TomcatID  # 杀掉原tomcat进程 
        echo "[info]tomcat..杀掉.[$(date +'%F %H:%M:%S')]" >>  /home/ubuntu/tomcat/log.log   
else
    echo "[error]tomcat不存在!"
    #rm -rf $TomcatCache
    $StartTomcat >> /home/ubuntu/tomcat/log.log  
fi
echo "------------------------------"

赋予脚本执行权限：

1	chmod +777 脚本名称

添加调度，cron脚本：

# Edit this file to introduce tasks to be run by cron.
# 
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
# 
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use '*' in these fields (for 'any').# 
# Notice that tasks will be started based on the cron's system
# daemon's notion of time and timezones.
# 
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
# 
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
# 
# For more information see the manual pages of crontab(5) and cron(8)
# 
# m h  dom mon dow   command
##7点启动
0 7 * * * /home/ubuntu/tomcat/shell/tomcat_start.sh 
##20点关闭
0 20 * * * /home/ubuntu/tomcat/shell/tomcat_killed.sh