java监控tomcat运行代码

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　　/**
*关闭tomcat
* @author wdw
*/
package com.tomcat;

public class TomcatShutDown {
    public static boolean stopTomcat() {
        try {

        String commandstr = "/usr/tomcat/bin/shutdown.sh";
        Process p;
        System.out.print("start ShutDown\n");
        p = Runtime.getRuntime().exec(commandstr);
        if (p.waitFor() == 0)
        {
        System.out.print("ShutDown over\n");
        return true;
        }
        else
        {
        System.out.print("ShutDown fail\n");
        return false;
        }
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
     }
   
    public static void main(String[] args) {
    stopTomcat() ;
     }
}




/**
*启动tomcat
* @author wdw
*/

package com.tomcat;

public class TomcatStartup {
    public static boolean startTomcat() {
   
    try {
   
        String commandstr = "/tomcat/bin/startup.sh";
        Process p;
        System.out.print("start start\n");
        p = Runtime.getRuntime().exec(commandstr);
        if (p.waitFor() == 0)
        {
        System.out.print("start over\n");
        return true;
        }
        else
        {
        System.out.print("start fail\n");
        return false;
        }
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }

    }
   
    public static void main(String[] args) {
    startTomcat() ;
     }
   
}


/**
*重新启动tomcat
* @author wdw
*/

package com.tomcat;

import java.util.Date;

public class TomcatRestart {
public static void restart()
{
TomcatShutDown.stopTomcat() ;
TomcatStartup.startTomcat();
System.out.println("run restart " + new Date());

try {
Thread.sleep(30000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void main(String[] args) {
restart();
}
}



/**
*检测tomcat状态
* @author wdw
* @site www.perji.com
*/
package com.tomcat;
import java.net.URL;

import java.net.URLConnection;

import java.util.Date;



public class Detector {

private static boolean keepTomcatAlive() throws NullPointerException {

String s;

String t = new String("/tomcat/bin/shutdown.sh");


java.io.BufferedReader in;

try {

URL url = new URL("http://www.mowker.com/");

URLConnection con = url.openConnection();

in = new java.io.BufferedReader(new java.io.InputStreamReader(con

.getInputStream()));

con.setConnectTimeout(2000);

con.setReadTimeout(6000);

while ((s = in.readLine()) != null) {

if (s.length() > 0) {

return true;

}

}

in.close();

} catch (Exception ex) {

}
TomcatRestart.restart();
return false;
}


public static void main(String[] args) {
long lasttime = System.currentTimeMillis();
long maxRunTime = 60*60*2000;
while (true) {
if( System.currentTimeMillis() -lasttime >maxRunTime)
{
TomcatRestart.restart();
lasttime = System.currentTimeMillis();
}
else
{
try {
Detector.keepTomcatAlive();
Thread.sleep(10000);
} catch (Exception ex) {
}
}

}

}
}