systeminfo.java

来自「webwork source」· Java 代码 · 共 60 行

/*
 * WebWork, Web Application Framework
 *
 * Distributable under Apache license.
 * See terms of license at opensource.org
 */
package webwork.examples;

import webwork.action.ActionSupport;

import java.util.Properties;

/**
 *	This action samples some virtual machine runtime information.
 *      
 *	@author Philipp Meier (<[e-mail]>)
 *	@version $Revision: 1.4 $
 */
public class SystemInfo extends ActionSupport
{
   private long currentTimeMillis;
   private Properties properties;
   private long freeMemory;
   private long totalMemory;

   public long currentTimeMillis()
   {
      return currentTimeMillis;
   }

   public Properties getProperties()
   {
      return properties;
   }

   public long getFreeMemory()
   {
      return freeMemory;
   }

   public long getTotalMemory()
   {
      return totalMemory;
   }

   public long getUsedMemory()
   {
      return totalMemory - freeMemory;
   }

   protected String doExecute()
   {
      properties = System.getProperties();
      currentTimeMillis = System.currentTimeMillis();
      freeMemory = Runtime.getRuntime().freeMemory();
      totalMemory = Runtime.getRuntime().totalMemory();
      return SUCCESS;
   }
}