proxool 配置... 转

1、proxool是一个非常优秀的数据库连接池框架。其常用配置属性如下，其中红体字为必配项，蓝体字为建议配置项，其他非必要可采用默认值。

alias：别名，用于获取数据库连接。

driver-url：数据库访问url。

driver-class：驱动类路径，包括包名

driver-properties：传给驱动的属性，常用的有：user：数据库用户名，password：数据库密码

fatal-sql-exception: 它是一个逗号分割的信息片段.当一个SQL异常发生时,他的异常信息将与这个信息片段进行比较.如果在片段中存在,那么这个异常将被认为是个致命错误(Fatal SQL Exception ).这种情况下,数据库连接将要被放弃.无论发生什么,这个异常将会被重掷以提供给消费者.用户最好自己配置一个不同的异常来抛出.
fatal-sql-exception-wrapper-class:正如上面所说,你最好配置一个不同的异常来重掷.利用这个属性,用户可以包装SQLException,使他变成另外一个异常.这个异常或者继承SQLException或者继承字RuntimeException.proxool自带了2个实现:'org.logicalcobwebs.proxool.FatalSQLException' 和'org.logicalcobwebs.proxool.FatalRuntimeException' .后者更合适.
house-keeping-sleep-time: house keeper 保留线程处于睡眠状态的最长时间,house keeper 的职责就是检查各个连接的状态,并判断是否需要销毁或者创建.
house-keeping-test-sql:  如果发现了空闲的数据库连接.house keeper 将会用这个语句来测试.这个语句最好非常快的被执行.如果没有定义,测试过程将会被忽略(如：select 0)。
injectable-connection-interface: 允许proxool实现被代理的connection对象的方法.
injectable-statement-interface: 允许proxool实现被代理的Statement 对象方法.
injectable-prepared-statement-interface: 允许proxool实现被代理的PreparedStatement 对象方法.
injectable-callable-statement-interface: 允许proxool实现被代理的CallableStatement 对象方法.
jmx: 略
jmx-agent-id: 略
jndi-name: 数据源的名称
maximum-active-time: 如果housekeeper 检测到某个线程的活动时间大于这个数值.它将会杀掉这个线程.所以确认一下你的服务器的带宽.然后定一个合适的值.默认是5分钟.
maximum-connection-count: 最大的数据库连接数.
maximum-connection-lifetime: 一个线程的最大寿命.
minimum-connection-count: 最小的数据库连接数
overload-without-refusal-lifetime: 略
prototype-count: 连接池中可用的连接数量.如果当前的连接池中的连接少于这个数值.新的连接将被建立(假设没有超过最大可用数).例如.我们有3个活动连接2个可用连接,而我们的prototype-count是4,那么数据库连接池将试图建立另外2个连接.这和 minimum-connection-count不同. minimum-connection-count把活动的连接也计算在内.prototype-count 是spare connections 的数量.
recently-started-threshold:  略
simultaneous-build-throttle:  略
statistics: 连接池使用状况统计。 参数“10s,1m,1d”
statistics-log-level:  日志统计跟踪类型。 参数“ERROR”或 “INFO”
test-before-use: 略
test-after-use: 略
trace: 如果为true,那么每个被执行的SQL语句将会在执行期被log记录(DEBUG LEVEL).你也可以注册一个ConnectionListener (参看ProxoolFacade)得到这些信息.
verbose: 详细信息设置。 参数 bool 值

 

部分默认值：

maximum-connection-lifetime   最大连接生命周期 默认值：4小时
maximum-active-time：   最大活动时间   默认值：5分钟
maximum-connection-count   最大连接数   默认值：15个
minimum-connection-count   最小连接数   默认值：5个

 

2、举例(各种数据库的驱动参见附件)：

a、SQL Server2000（或2005）配置：

 

<?xml version="1.0" encoding="UTF-8"?>
<something-else-entirely>
    <proxool>
        <alias>erp</alias>
        <driver-url>
            jdbc:jtds:sqlserver://127.0.0.1:1433;DatabaseName=db_test;
        </driver-url>
        <driver-class>net.sourceforge.jtds.jdbc.Driver</driver-class>
        <driver-properties>
            <property name="user" value="sa" />
            <property name="password" value="123456" />
            <property name="autoReconnect" value="true" />
        </driver-properties>
        <minimum-connection-count>5</minimum-connection-count>
        <maximum-connection-count>50</maximum-connection-count>
        <house-keeping-sleep-time>30</house-keeping-sleep-time>
          <maximum-active-time>600000</maximum-active-time>
          <house-keeping-test-sql>select 0</house-keeping-test-sql>
    </proxool>
</something-else-entirely>

<?xml version="1.0" encoding="UTF-8"?>
<something-else-entirely>
	<proxool>
		<alias>erp</alias>
		<driver-url>
			jdbc:jtds:sqlserver://127.0.0.1:1433;DatabaseName=db_test;
		</driver-url>
		<driver-class>net.sourceforge.jtds.jdbc.Driver</driver-class>
		<driver-properties>
			<property name="user" value="sa" />
			<property name="password" value="123456" />
			<property name="autoReconnect" value="true" />
		</driver-properties>
		<minimum-connection-count>5</minimum-connection-count>
		<maximum-connection-count>50</maximum-connection-count>
		<house-keeping-sleep-time>30</house-keeping-sleep-time>
          <maximum-active-time>600000</maximum-active-time>		
          <house-keeping-test-sql>select 0</house-keeping-test-sql>
	</proxool>
</something-else-entirely>

 

 

b、Oracle配置：

 

<?xml version="1.0" encoding="UTF-8"?>
<something-else-entirely>
     <proxool>
        <alias>orc</alias>
        <driver-url>
            jdbc:oracle:thin:@192.168.0.1:1521:db_test
        </driver-url>
        <driver-class>oracle.jdbc.driver.OracleDriver</driver-class>
        <driver-properties>
            <property name="user" value="system" />
            <property name="password" value="manager" />
        </driver-properties>
        <minimum-connection-count>1</minimum-connection-count>
        <maximum-connection-count>20</maximum-connection-count>
        <house-keeping-sleep-time>30</house-keeping-sleep-time>
        <maximum-active-time>600000</maximum-active-time>
        <house-keeping-test-sql>select 0</house-keeping-test-sql>
        <trace>false</trace>
        <statistics-log-level>ERROR</statistics-log-level>
    </proxool>
</something-else-entirely>

<?xml version="1.0" encoding="UTF-8"?>
<something-else-entirely>
     <proxool>
		<alias>orc</alias>
		<driver-url>
			jdbc:oracle:thin:@192.168.0.1:1521:db_test
		</driver-url>
		<driver-class>oracle.jdbc.driver.OracleDriver</driver-class>
		<driver-properties>
			<property name="user" value="system" />
			<property name="password" value="manager" />
		</driver-properties>
		<minimum-connection-count>1</minimum-connection-count>
		<maximum-connection-count>20</maximum-connection-count>
		<house-keeping-sleep-time>30</house-keeping-sleep-time>
        <maximum-active-time>600000</maximum-active-time>		
        <house-keeping-test-sql>select 0</house-keeping-test-sql>
		<trace>false</trace>
		<statistics-log-level>ERROR</statistics-log-level>
	</proxool>
</something-else-entirely>

 

 

c、MySql配置：

 

<?xml version="1.0" encoding="UTF-8"?>
<something-else-entirely>
<proxool>
        <alias>erp</alias>
        <driver-url>
            jdbc:mysql://192.168.0.1:3306/db_test?useUnicode=true&amp;characterEncoding=UTF8
        </driver-url>
        <driver-class>com.mysql.jdbc.Driver</driver-class>
        <driver-properties>
            <property name="user" value="root" />
            <property name="password" value="root" />
            <property name="autoReconnect" value="true" />
        </driver-properties>
        <minimum-connection-count>5</minimum-connection-count>
        <maximum-connection-count>50</maximum-connection-count>
        <house-keeping-sleep-time>30</house-keeping-sleep-time>
        <house-keeping-test-sql>select 0</house-keeping-test-sql>
        <maximum-active-time>3600000</maximum-active-time>
    </proxool>
</something-else-entirely>

<?xml version="1.0" encoding="UTF-8"?>
<something-else-entirely>
<proxool>
		<alias>erp</alias>
		<driver-url>
			jdbc:mysql://192.168.0.1:3306/db_test?useUnicode=true&amp;characterEncoding=UTF8
		</driver-url>
		<driver-class>com.mysql.jdbc.Driver</driver-class>
		<driver-properties>
			<property name="user" value="root" />
			<property name="password" value="root" />
			<property name="autoReconnect" value="true" />
		</driver-properties>
		<minimum-connection-count>5</minimum-connection-count>
		<maximum-connection-count>50</maximum-connection-count>
		<house-keeping-sleep-time>30</house-keeping-sleep-time>
		<house-keeping-test-sql>select 0</house-keeping-test-sql>
		<maximum-active-time>3600000</maximum-active-time>
	</proxool>
</something-else-entirely>

 

 

d、Sybase配置：

 

<?xml version="1.0" encoding="UTF-8"?>
<something-else-entirely>
<proxool>
    <alias>db_test</alias>
    <driver-url>jdbc:sybase:Tds:192.168.0.1:5000/db_test?charset=cp936</driver-url><!--防止乱码，在sybase中编码通常采用cp850或者cp936-->
    <driver-class>com.sybase.jdbc3.jdbc.SybDriver</driver-class>
    <driver-properties>
      <property name="user" value="sa"/>
      <property name="password" value="123456"/>
    </driver-properties>
    <minimum-connection-count>10</minimum-connection-count>
    <maximum-connection-count>20</maximum-connection-count>
    <house-keeping-sleep-time>40000</house-keeping-sleep-time>
    <maximum-active-time>900000</maximum-active-time>
    <house-keeping-test-sql>select 0</house-keeping-test-sql>
 </proxool>
</something-else-entirely>

<?xml version="1.0" encoding="UTF-8"?>
<something-else-entirely>
<proxool>
    <alias>db_test</alias>
    <driver-url>jdbc:sybase:Tds:192.168.0.1:5000/db_test?charset=cp936</driver-url><!--防止乱码，在sybase中编码通常采用cp850或者cp936-->
    <driver-class>com.sybase.jdbc3.jdbc.SybDriver</driver-class>
    <driver-properties>
      <property name="user" value="sa"/>
      <property name="password" value="123456"/>
    </driver-properties>
    <minimum-connection-count>10</minimum-connection-count>
    <maximum-connection-count>20</maximum-connection-count>
    <house-keeping-sleep-time>40000</house-keeping-sleep-time>
    <maximum-active-time>900000</maximum-active-time>
    <house-keeping-test-sql>select 0</house-keeping-test-sql>
 </proxool>
</something-else-entirely>

 

 

3、具体使用

a、对于proxool使用在J2EE的web项目中，可以配置到web.xml文件中使用，具体配置使用步骤网上一搜一大堆，这里不细说。

 

b、proxool用在各种J2EE框架中，如Spring、Hibernate等，可以自己网上找，相关介绍很多，这里也不细讲。

 

c、自己加载解析使用(假如数据库配置文件名为dbconfig.xml，数据库连接配置的别名为db_test)，首先写一个解析、管理配置文件和数据库连接的类如下：

 

/**
 * 数据库连接管理器
 *
 * @author 蜘蛛
 *
 */
public class DBConnector {

    /**默认数据库连接配置文件名称*/
    private static String dbConfig = "dbconfig.xml";

    public DBConnector() {

    }

    public DBConnector(String dbConfigMas) {
        dbConfig = dbConfigMas;
    }

    /**
     * 初始化
     *
     * @return
     */
    public boolean init() {
        try {
            JAXPConfigurator.configure(dbConfig, false);
            return true;
        } catch (ProxoolException ex) {
            ex.printStackTrace();
        }
        return false;
    }

    /**
     * 获取数据库连接
     *
     * @return
     */
    public static Connection getConn() {

        Connection temp = null;
        try {
            temp = DriverManager.getConnection("proxool.db_test");
        } catch (SQLException e) {
            e.printStackTrace();
            try {
                JAXPConfigurator.configure(dbConfig, false);
                temp = DriverManager.getConnection("proxool.mas");
            } catch (ProxoolException ex) {
                ex.printStackTrace();
            } catch (SQLException sqlE) {
                sqlE.printStackTrace();
            }
        }
        return temp;
    }

    /**
     * 关闭数据库连接，释放数据库连接
     *
     * @param rs
     * @param pstmt
     * @param con
     */
    public static void close(ResultSet rs, PreparedStatement pstmt, Connection con) {
        if(null != rs) {
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if (null != pstmt) {
            try {
                pstmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if (null != con) {
            try {
                con.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}

/**
 * 数据库连接管理器
 * 
 * @author 蜘蛛
 *
 */
public class DBConnector {
	
	/**默认数据库连接配置文件名称*/
    private static String dbConfig = "dbconfig.xml";

    public DBConnector() {

    }

    public DBConnector(String dbConfigMas) {
        dbConfig = dbConfigMas;
    }

    /**
     * 初始化
     * 
     * @return
     */
    public boolean init() {
        try {
            JAXPConfigurator.configure(dbConfig, false);
            return true;
        } catch (ProxoolException ex) {
            ex.printStackTrace();
        }
        return false;
    }

    /**
     * 获取数据库连接
     * 
     * @return
     */
    public static Connection getConn() {
        
    	Connection temp = null;
    	try {
    		temp = DriverManager.getConnection("proxool.db_test");
		} catch (SQLException e) {
			e.printStackTrace();
			try {
				JAXPConfigurator.configure(dbConfig, false);
				temp = DriverManager.getConnection("proxool.mas");
	        } catch (ProxoolException ex) {
	            ex.printStackTrace();
	        } catch (SQLException sqlE) { 
	        	sqlE.printStackTrace();
	        }
		}
		return temp;
    }
    
    /**
     * 关闭数据库连接，释放数据库连接
     * 
     * @param rs
     * @param pstmt
     * @param con
     */
    public static void close(ResultSet rs, PreparedStatement pstmt, Connection con) {
    	if(null != rs) {
			try {
				rs.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		if (null != pstmt) {
			try {
				pstmt.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		if (null != con) {
			try {
				con.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
    }
}

 

 测试类：

 

public class TestProxool{

public static void main(String[]args {
      DBConnector dbCon = new DBConnector();
            if(!dbCon.init()){
               Debuger.log("数据库连接配置加载并初始化失败......");
               return ;
            }
            Debuger.log("数据库连接配置加载并初始化成功......");
            //只需在程序一开始启动时加载初始化即可，以后直接采用类DBConnector的静态方法getConn获取数据库连接，无需再执行加载初始化操作
            System.out.println("连接 = " + DBConnector.getConn());
      }

}

public class TestProxool{

public static void main(String[]args {
      DBConnector dbCon = new DBConnector();
            if(!dbCon.init()){
               Debuger.log("数据库连接配置加载并初始化失败......");
               return ;
            }
            Debuger.log("数据库连接配置加载并初始化成功......");
            //只需在程序一开始启动时加载初始化即可，以后直接采用类DBConnector的静态方法getConn获取数据库连接，无需再执行加载初始化操作
            System.out.println("连接 = " + DBConnector.getConn());
      }

}

 

 

 

评论

1 楼 lcu_meng 2012-02-08