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import java.net.Socket;
import java.util.Hashtable;
public class ConnectionPool
{
private static final int CONNECTION_POOL_SIZE=10;
private static final String API_SERVER_HOST="127.0.0.01";
private static final int API_SERVER_PORT=80;
private static ConnectionPool self=null;
private Hashtable socketPool=null;//连接池
private boolean[] socketStatusArray=null;//连接得状态 true被占用false空闲
public static synchronized void init()
{
self=new ConnectionPool();
self.socketPool=new Hashtable();
self.socketStatusArray=new boolean[CONNECTION_POOL_SIZE];
//初始化连接池
self.buildConnectionPool();
}
public static synchronized void reset()
{
self=null;
init();
}
public static Socket getConnection()
{
if(self==null)
init();
int i=0;
for(i=0;i<CONNECTION_POOL_SIZE;i++)
{
if(!self.socketStatusArray[i])
{
self.socketStatusArray[i]=true;
break;
}
}
if(i<CONNECTION_POOL_SIZE)
return (Socket)self.socketPool.get(new Integer(i));
else
{
System.out.println("从连接池种获取与邮局得连接失败,已经没有空闲连接!");
throw new RuntimeException("No enough pooled connection.");
}
}
public static void releaseConnection(Socket Socket)
{
if(self==null)
init();
for(int i=0;i<CONNECTION_POOL_SIZE;i++)
{
if(((Socket)self.socketPool.get(new Integer(i)))==Socket)
{
self.socketStatusArray[i]=false;
break;
}
}
}
public static Socket rebuildConnection(Socket Socket)
{
if(self==null)
init();
Socket newSocket=null;
for(int i=0;i<CONNECTION_POOL_SIZE;i++)
{
try
{
if(((Socket)self.socketPool.get(new Integer(i)))==Socket)
{
System.out.println("重建连接池中得第"+i+"个连接.");
newSocket=new Socket(API_SERVER_HOST,API_SERVER_PORT);
self.socketPool.put(new Integer(i),newSocket);
self.socketStatusArray[i]=true;
break;
}
}
catch(Exception e)
{
System.out.println("重建连接失败!");
throw new RuntimeException(e);
}
}
return newSocket;
}
public synchronized static void buildConnectionPool()
{
if(self==null)
init();
System.out.println("准备建立连接池.");
Socket Socket=null;
try
{
for(int i=0;i<CONNECTION_POOL_SIZE;i++)
{
Socket=new Socket(API_SERVER_HOST,API_SERVER_PORT);
self.socketPool.put(new Integer(i),Socket);
self.socketStatusArray[i]=false;
}
}
catch(Exception e)
{
System.out.println("与邮局得连接池建立失败!");
throw new RuntimeException(e);
}
}
public synchronized static void releaseAllConnection()
{
if(self==null)
init();
//关闭所有连接
Socket Socket=null;
for(int i=0;i<CONNECTION_POOL_SIZE;i++)
{
Socket=(Socket)self.socketPool.get(new Integer(i));
try
{
Socket.close();
}
catch(Exception e)
{}
}
}
}