proxool详细配置

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proxool

配置管理 Servlet SQL prototype HSQLDB

proxool详细配置

文章分类:Java编程 关键字: proxool 配置

proxool一个数据库连接池框架，提供了对你选择的其它类型的驱动程序的连接池封装。可以非常简单的移植到现存的代码中。完全可配置。快速，成熟，健壮。可以透明地为你现存的JDBC驱动程序增加连接池功能。到目前为止最新版本是proxool 0.9.1,可从官网下载最新版本 http://proxool .sourceforge.net

一、配置proxool.xml文件

Xml代码

<? xml version = "1.0" encoding = "UTF-8" ?>
<!--
the proxool configuration can be embedded within your own
application's. Anything outside the "proxool" tag is ignored.
-->
< 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 sysdate from dual </ house-keeping-test-sql >
</ proxool >
</ something-else-entirely >

<?xml version="1.0" encoding="UTF-8"?>
	<!--
		the proxool configuration can be embedded within your own
		application's. Anything outside the "proxool" tag is ignored.
	-->
<something-else-entirely>
	<proxool>
		<alias>dbname</alias> <!--数据源的别名-->
		<driver-url>jdbc:oracle:thin:@127.0.0.1:1521:testdb</driver-url><!--url连接串-->
		<driver-class>oracle.jdbc.driver.OracleDriver</driver-class> <!--驱动类-->
		<driver-properties>
			<property name="user" value="username" /> <!--用户名-->
			<property name="password" value="password" /><!--密码-->
		</driver-properties> 
		<!--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 -->
		<maximum-connection-count>100</maximum-connection-count> 
		<!--最小连接数(默认2个)-->
		<minimum-connection-count>10</minimum-connection-count> 
		<!--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-->
		<house-keeping-sleep-time>90000</house-keeping-sleep-time>
		<!--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-->
		<maximum-new-connections>10</maximum-new-connections> 
		<!--最少保持的空闲连接数(默认2个)-->
		<prototype-count>5</prototype-count> 
		<!--在使用之前测试-->
		<test-before-use>true</test-before-use>
		<!--用于保持连接的测试语句 -->
		<house-keeping-test-sql>select sysdate from dual</house-keeping-test-sql>
	</proxool>
</something-else-entirely>

二、配置web.xml

Xml代码

<? xml version = "1.0" encoding = "UTF-8" ?>
< web-app version = "2.4" xmlns = "http://java.sun.com/xml/ns/j2ee"
xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation ="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
< 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 >
< security-constraint >
< web-resource-collection >
< web-resource-name > proxool </ web-resource-name >
< url-pattern > /admin </ url-pattern >
</ web-resource-collection >
< auth-constraint >
< role-name > manager </ role-name >
</ auth-constraint >
</ security-constraint >
< login-config >
< auth-method > BASIC </ auth-method >
< realm-name > proxool manager Application </ realm-name >
</ login-config >
< security-role >
< description > The role that is required to log in to the Manager Application </ description >
< role-name > manager </ role-name >
</ security-role >
< error-page >
< error-code > 401 </ error-code >
< location > /401.jsp </ location >
</ error-page >
</ web-app >

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
	http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<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>
<!-- 配置受保护域，只有Tomcat管理员才能察看连接池的信息 -->
<security-constraint>
  <web-resource-collection>
      <web-resource-name>proxool</web-resource-name> 
      <url-pattern>/admin</url-pattern>
  </web-resource-collection>
  <auth-constraint>
     <role-name>manager</role-name> 
     </auth-constraint>
  </security-constraint>
 <login-config>
     <auth-method>BASIC</auth-method> 
     <realm-name>proxool manager Application</realm-name> 
  </login-config>
  <security-role>
    <description>The role that is required to log in to the Manager Application</description> 
     <role-name>manager</role-name> 
 </security-role>
  <error-page>
    <error-code>401</error-code>
    <location>/401.jsp</location>
  </error-page>
</web-app>

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: 数值越小，就会先被加载初始化
Admin:监控数据库连接池的连接情况

//获得数据库连接的语句

Connection conn=DriverManager.getConnection("proxool.dbname");

注意:在401.jsp页面中必须加

<%
response.setHeader("WWW-Authenticate", "Basic realm=\"Tomcat Manager Application\"");
%>这句话，否则在访问/admin察看连接池信息时，会直接跳转到401.jsp页面。我们是想让访问admin/的用户必须输入用户名和密码，且必须是manager角色，三次输入不正确才会跳到401.jsp页面，如图

输入正确用户名和密码后才能看到proxool池的信息

三、更详细的proxool.xml的配置属性说明:

Xml代码

<? 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 >
< 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 >
</ 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 : 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

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