proxool数据源常规配置

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JDBC+数据源

proxool 数据源常规配置

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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HQL生成器--查询语句 | dncp数据源的常规配置

2013-12-17 15:43
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