proxool 连接池配置属性说明

<?
xml
 version
="1.0"
 encoding
="ISO-8859-1"
?>
<!--
Properties for Proxool Configurator testing. Defines the same parameters as
TestHelper.buildCompleteAlternativeProperties()
-->
<
something-else-entirely
 xmlns
="http://sumthin.else.entirely"
 xmlns:proxool
="
The latest version is available at http://proxool.sourceforge.net/xml-namespace">
    <
proxool:proxool
>
        <
proxool:alias
>
xml-test-ns</
proxool:alias
>
        <
proxool:driver-url
>
jdbc:hsqldb:db/test</
proxool:driver-url
>
        <
proxool:driver-class
>
org.hsqldb.jdbcDriver</
proxool:driver-class
>
        <
proxool:driver-properties
>
            <
proxool:property
 name
="user"
 value
="sa"
/>
            <
proxool:property
 name
="password"
 value
=""
/>
        </
proxool:driver-properties
>
        <
proxool:house-keeping-sleep-time
>
40000</
proxool:house-keeping-sleep-time
>
        <
proxool:house-keeping-test-sql
>
select CURRENT_DATE
        </
proxool:house-keeping-test-sql
>
        <
proxool:maximum-connection-count
>
10</
proxool:maximum-connection-count
>
        <
proxool:minimum-connection-count
>
3</
proxool:minimum-connection-count
>
        <
proxool:maximum-connection-lifetime
>
18000000
        </
proxool:maximum-connection-lifetime
>
 <!-- 5 hours -->
        <
proxool:simultaneous-build-throttle
>
5</
proxool:simultaneous-build-throttle
>
        <
proxool:recently-started-threshold
>
40000</
proxool:recently-started-threshold
>
        <
proxool:overload-without-refusal-lifetime
>
50000
        </
proxool:overload-without-refusal-lifetime
>
        <
proxool:maximum-active-time
>
60000</
proxool:maximum-active-time
>
        <
proxool:verbose
>
true</
proxool:verbose
>
        <
proxool:trace
>
true</
proxool:trace
>
        <
proxool:fatal-sql-exception
>
Fatal error</
proxool:fatal-sql-exception
>
        <
proxool:prototype-count
>
2</
proxool:prototype-count
>
    </
proxool:proxool
>

    <
nothing-to-do-with-proxool
>
        <
proxool:proxool
>
            <
proxool:alias
>
xml-test-ns-2</
proxool:alias
>
            <
proxool:driver-url
>
jdbc:hsqldb:db/test</
proxool:driver-url
>
            <
proxool:driver-class
>
org.hsqldb.jdbcDriver</
proxool:driver-class
>
            <
proxool:driver-properties
>
                <
proxool:property
 name
="user"
 value
="sa"
/>
                <
proxool:property
 name
="password"
 value
=""
/>
            </
proxool:driver-properties
>
            <
proxool:house-keeping-sleep-time
>
40000</
proxool:house-keeping-sleep-time
>
            <
proxool:house-keeping-test-sql
>
select CURRENT_DATE
            </
proxool:house-keeping-test-sql
>
            <
proxool:maximum-connection-count
>
10</
proxool:maximum-connection-count
>
            <
proxool:minimum-connection-count
>
3</
proxool:minimum-connection-count
>
            <
proxool:maximum-connection-lifetime
>
18000000
            </
proxool:maximum-connection-lifetime
>
 <!-- 5 hours -->
            <
proxool:simultaneous-build-throttle
>
5</
proxool:simultaneous-build-throttle
>
            <
proxool:recently-started-threshold
>
40000</
proxool:recently-started-threshold
>
            <
proxool:overload-without-refusal-lifetime
>
50000
            </
proxool:overload-without-refusal-lifetime
>
            <
proxool:maximum-active-time
>
60000</
proxool:maximum-active-time
>
            <
proxool:verbose
>
true</
proxool:verbose
>
            <
proxool:trace
>
true</
proxool:trace
>
            <
proxool:fatal-sql-exception
>
Fatal error</
proxool:fatal-sql-exception
>
            <
proxool:prototype-count
>
2</
proxool:prototype-count
>
        </
proxool:proxool
>
    </
nothing-to-do-with-proxool
>
</
something-else-entirely
>

<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
Properties for Proxool Configurator testing. Defines the same parameters as
TestHelper.buildCompleteAlternativeProperties()
-->
<something-else-entirely xmlns="http://sumthin.else.entirely" xmlns:proxool="
The latest version is available at http://proxool.sourceforge.net/xml-namespace">
    <proxool:proxool>
        <proxool:alias>xml-test-ns</proxool:alias>
        <proxool:driver-url>jdbc:hsqldb:db/test</proxool:driver-url>
        <proxool:driver-class>org.hsqldb.jdbcDriver</proxool:driver-class>
        <proxool:driver-properties>
            <proxool:property name="user" value="sa"/>
            <proxool:property name="password" value=""/>
        </proxool:driver-properties>
        <proxool:house-keeping-sleep-time>40000</proxool:house-keeping-sleep-time>
        <proxool:house-keeping-test-sql>select CURRENT_DATE
        </proxool:house-keeping-test-sql>
        <proxool:maximum-connection-count>10</proxool:maximum-connection-count>
        <proxool:minimum-connection-count>3</proxool:minimum-connection-count>
        <proxool:maximum-connection-lifetime>18000000
        </proxool:maximum-connection-lifetime> <!-- 5 hours -->
        <proxool:simultaneous-build-throttle>5</proxool:simultaneous-build-throttle>
        <proxool:recently-started-threshold>40000</proxool:recently-started-threshold>
        <proxool:overload-without-refusal-lifetime>50000
        </proxool:overload-without-refusal-lifetime>
        <proxool:maximum-active-time>60000</proxool:maximum-active-time>
        <proxool:verbose>true</proxool:verbose>
        <proxool:trace>true</proxool:trace>
        <proxool:fatal-sql-exception>Fatal error</proxool:fatal-sql-exception>
        <proxool:prototype-count>2</proxool:prototype-count>
    </proxool:proxool>

    <nothing-to-do-with-proxool>
        <proxool:proxool>
            <proxool:alias>xml-test-ns-2</proxool:alias>
            <proxool:driver-url>jdbc:hsqldb:db/test</proxool:driver-url>
            <proxool:driver-class>org.hsqldb.jdbcDriver</proxool:driver-class>
            <proxool:driver-properties>
                <proxool:property name="user" value="sa"/>
                <proxool:property name="password" value=""/>
            </proxool:driver-properties>
            <proxool:house-keeping-sleep-time>40000</proxool:house-keeping-sleep-time>
            <proxool:house-keeping-test-sql>select CURRENT_DATE
            </proxool:house-keeping-test-sql>
            <proxool:maximum-connection-count>10</proxool:maximum-connection-count>
            <proxool:minimum-connection-count>3</proxool:minimum-connection-count>
            <proxool:maximum-connection-lifetime>18000000
            </proxool:maximum-connection-lifetime> <!-- 5 hours -->
            <proxool:simultaneous-build-throttle>5</proxool:simultaneous-build-throttle>
            <proxool:recently-started-threshold>40000</proxool:recently-started-threshold>
            <proxool:overload-without-refusal-lifetime>50000
            </proxool:overload-without-refusal-lifetime>
            <proxool:maximum-active-time>60000</proxool:maximum-active-time>
            <proxool:verbose>true</proxool:verbose>
            <proxool:trace>true</proxool:trace>
            <proxool:fatal-sql-exception>Fatal error</proxool:fatal-sql-exception>
            <proxool:prototype-count>2</proxool:prototype-count>
        </proxool:proxool>
    </nothing-to-do-with-proxool>
</something-else-entirely>

 

属性列表说明:

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。

 

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 : 连接最大生命时间 默认4小时

 

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 :   同时最大连接数

 

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

 

 

 

注：maximum-active-time 过小 会影响批量操作，例插入2w+行，导致链接不可打开等异常