com.ds.common.database

类 ConnectionPool

java.lang.Object

com.ds.common.database.ConnectionPool

所有已实现的接口:

Runnable

public class ConnectionPool
extends Object
implements Runnable

Title: 常用代码打包

Description: Database connection pool.

Copyright: Copyright (c) 2006

Company: www.justdos.net

版本:

1.0

作者:

wenzhang li

字段概要

字段

限定符和类型	字段和说明
protected static com.ds.common.logging.Log	log Commons Logging instance.

构造器概要

构造器

构造器和说明
ConnectionPool(String driver, String serverURL, String username, String password, int minCon, int maxCon, double conTimeout, boolean mysqlUseUnicode, String encoding)

方法概要

限定符和类型	方法和说明
void	destroy()
void	freeConnection()
Connection	getConnection()
int	getSize()
void	run() Housekeeping thread.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

log

protected static com.ds.common.logging.Log log

Commons Logging instance.

构造器详细资料

ConnectionPool

public ConnectionPool(String driver,
                      String serverURL,
                      String username,
                      String password,
                      int minCon,
                      int maxCon,
                      double conTimeout,
                      boolean mysqlUseUnicode,
                      String encoding)
               throws IOException

抛出:

IOException

方法详细资料

getConnection

public Connection getConnection()
                         throws SQLException

抛出:

SQLException

freeConnection

public void freeConnection()

destroy

public void destroy()
             throws SQLException

抛出:

SQLException

getSize

public int getSize()

run

public void run()

Housekeeping thread. This thread runs every 30 seconds and checks connections for the following conditions:

• Connection has been open too long - it'll be closed and another connection created.
• Connection hasn't been used for 30 seconds and the number of open connections is greater than the minimum number of connections. The connection will be closed. This is done so that the pool can shrink back to the minimum number of connections if the pool isn't being used extensively.
• Unable to create a statement with the connection - it'll be reset.

指定者:

run 在接口中 Runnable