Spring 中使用proxool的配置+【转】proxool.xml配置属性说明

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XML Spring Servlet SQL prototype

一.配置proxool.xml
添加proxool.xml文件到项目的/WEB-INF下.
连接数据库Oracle的配置如下:

<? xml version="1.0" encoding="ISO-8859-1" ?>

< something-else-entirely >
 < proxool >
 < alias > dbname </ alias >
 < driver-url > jdbc:oracle:thin:@127.0.0.1:1521:testdb </ driver-url >
 < driver-class > oracle.jdbc.driver.OracleDriver </ driver-class >
 < driver-properties >
 < property name ="user" value ="username" />
 < property name ="password" value ="password" />
 </ driver-properties >
 < maximum-connection-count > 100 </ maximum-connection-count >
 < minimum-connection-count > 10 </ minimum-connection-count >
 < house-keeping-sleep-time > 90000 </ house-keeping-sleep-time >
 < maximum-new-connections > 10 </ maximum-new-connections >
 < prototype-count > 5 </ prototype-count >
 < test-before-use > true </ test-before-use >
 < house-keeping-test-sql > select 1 from dual </ house-keeping-test-sql >
 </ proxool >
</ something-else-entirely >

alias: 数据源的别名
driver-url: url连接串,须确定用户名和密码
driver-class: 驱动名
username: 用户名(proxool没有使用,但是不能没有)
password: 密码(proxool没有使用,但是不能没有)
maximum-connection-count: 最大连接数(默认5 个),超过了这个连接数,再有请求时,就排在队列中等候,最大的等待请求数由maximum-new-connections 决定
minimum-connection-count: 最小连接数(默认2个)
house-keeping-sleep-time: proxool 自动侦察各个连接状态的时间间隔(毫秒),侦察到空闲的连接就马上回收,超时的销毁默认30秒)
prototype-count: 最少保持的空闲连接数(默认2个)
maximum-new-connections: 没有空闲连接可以分配而在队列中等候的最大请求数,超过这个请求数的用户连接就不会被接受
test-before-use和house-keeping-test-sql:测试用

二.配置web.xml

< servlet >
 < servlet-name > contextConfigLocation </ servlet-name >
 < servlet-class >
 org.springframework.web.context.ContextLoaderServlet
 </ servlet-class >
 < load-on-startup > 2 </ load-on-startup >
</ servlet >

< servlet >
 < servlet-name > ServletConfigurator </ servlet-name >
 < servlet-class >
 org.logicalcobwebs.proxool.configuration.ServletConfigurator
 </ servlet-class >
 < init-param >
 < param-name > xmlFile </ param-name >
 < param-value > WEB-INF/proxool.xml </ param-value >
 </ init-param >
 < load-on-startup > 1 </ load-on-startup >
</ servlet >

< servlet >
 < servlet-name > Admin </ servlet-name >
 < servlet-class >
 org.logicalcobwebs.proxool.admin.servlet.AdminServlet
 </ servlet-class >
</ servlet >
< servlet-mapping >
 < servlet-name > Admin </ servlet-name >
 < url-pattern > /admin </ url-pattern >
</ servlet-mapping >

ServletConfigurator : 加载并初始化proxool.xml文件,因为它是连接数据库的.其他很多模块都用到数据,所以必须首先加载它
load-on-startup: 值越小级别就越高，就先被加载初始化
contextConfigLocation: 加载Spring的配置文件,如果以前是:

< listener >
 < listener-class >
 org.springframework.web.context.ContextLoaderListener
 </ listener-class >
</ listener >

则必须改成

设置加载顺序为 proxool.xml之后,如果设置成监听器的形式,因监听器会在servlet之前加载,所以会报错.
Admin: 监控数据库连接池的连接情况

三.配置applicationContext.xml,整合Spring和proxool

< bean id ="dataSource"
 class ="org.springframework.jdbc.datasource.DriverManagerDataSource" >
 < property name ="driverClassName"
 value ="org.logicalcobwebs.proxool.ProxoolDriver" />
 < property name ="url" value ="proxool.dbname" />
</ bean >

<property name="url">要配置成 proxool. + proxool.xml中的别名

配置基本完成,还有其它配置方式,但个人比较喜好这种.

另附加一份proxool.xml的配置属性说明:

<? 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 >

< 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 >