pooledconnection.java

来自「本人课程设计时做的一个用struts框架实现的基于cmmi2的项目管理系统的原型」· Java 代码 · 共 74 行

package com.cmmi2pms.common.comdb;

/** 
 * connection object
 * 
 * @author xunzy
 * @version 0.01
 *
 */
public class PooledConnection
{
	// The JDBC Connection
	public java.sql.Connection con;
	
	// true if this connection is currently in use
	public boolean inUse;
	
	// The last time (in milliseconds) that this connection was used
	public long lastAccess;
	
	// The number of times this connection has been used
	public int useCount;
	
	private long timeTagID;
	
	/**
	 * Default constructor
	 */
	public PooledConnection()
	{
		java.util.Date d = new java.util.Date();
		timeTagID = (long) d.getTime();
	}
	public long getTimeTagID()
	{
		return timeTagID;	
	}
	/**
	* <p>Determine if the connection is available
	*
	* @return true if the connection can be used
	*/
	public boolean isAvailable()
	{
		boolean available = false;
		
		try
		{
		
			// To be available, the connection cannot be in use
			// and must be open
			if (con != null)
			{
				if (!inUse &&!con.isClosed())
				{
					available = true;
				}
			}
		}
		catch (Exception ex){}
		
		return available;
	}
	
	/**
	* <p>Convert the object contents to a String
	*/
	public String toString()
	{
		return "Connection=" + con + ",inUse=" + inUse +
		",lastAccess=" + lastAccess + ",useCount=" + useCount;
	}
}