2.spring中配置proxool数据源

时间 2019-11-24

标签 2.spring spring 配置 proxool 数据栏目 Spring 繁體版

原文原文链接

方式一：
在Spring的"applicationContext.xml"中的dataSource bean定义——java

 1 <bean id="dataSource"
 2     class="org.logicalcobwebs.proxool.ProxoolDataSource">
 3     <property name="driver">
 4         <value>com.mysql.jdbc.Driver</value>
 5     </property>
 6     <property name="driverUrl">
 7         <value>jdbc:mysql://localhost:3306/dbname?user=yourname&amp;password=yourpass</value>
 8     </property>
 9     <property name="user" value="yourname" />
10     <property name="password" value="yourpass" />
11     <property name="alias" value="Pool_dbname" />
12     <property name="houseKeepingSleepTime" value="90000" />
13     <property name="prototypeCount" value="0" />
14     <property name="maximumConnectionCount" value="50" />
15     <property name="minimumConnectionCount" value="2" />
16     <property name="simultaneousBuildThrottle" value="50" />
17     <property name="maximumConnectionLifetime" value="14400000" />
18     <property name="houseKeepingTestSql" value="select CURRENT_DATE" />
19 </bean>

第一种方式须要把用户名和密码写在链接串里面，
ProxoolDataSource类提供的user，password属性彷佛没有什么用。
不管提供什么，它都会以空用户名、密码去链接数据库。
这多是Proxool RC0.93的一个bug，实在让人恼火，不知道最新的0.9.1有没有fix这个bug。
不过配置中的user，password两个属性还必须设置，不然hibernate会报空指针错误。mysql

方式二：
在Spring的"applicationContext.xml"中的dataSource bean定义——web

1 <bean id="dataSource"
2     class="org.springframework.jdbc.datasource.DriverManagerDataSource">
3     <property name="driverClassName">
4         <value>org.logicalcobwebs.proxool.ProxoolDriver</value>
5     </property>
6     <property name="url">
7         <value>proxool.Pool_dbname</value>
8     </property>
9 </bean>

第二种方式须要预先在"web.xml"先配置好Proxool链接池，配置以下：spring

 1 <servlet>
 2     <servlet-name>proxoolServletConfigurator</servlet-name>
 3     <servlet-class>
 4         org.logicalcobwebs.proxool.configuration.ServletConfigurator
 5     </servlet-class>
 6     <init-param>
 7         <param-name>xmlFile</param-name>
 8         <param-value>WEB-INF/proxool.xml</param-value>
 9     </init-param>
10     <load-on-startup>1</load-on-startup>
11 </servlet>
12 
13 <servlet>
14     <servlet-name>context</servlet-name>
15     <servlet-class>
16         org.springframework.web.context.ContextLoaderServlet
17     </servlet-class>
18     <load-on-startup>2</load-on-startup>
19 </servlet>

注意，第二种方式下Spring的上下文加载若是想使用listener方式(Struts2要求)，
则与链接池有关的Bean全得延迟初始化。由于listener比servlet优先初始化，
若是相关Bean不是lazy-init的话，则启动服务器时会出现Bean找不到链接定义的异常。sql

1  <listener>
2   <listener-class>
3       org.springframework.web.context.ContextLoaderListener
4   </listener-class>
5  </listener>

其中proxool的配置文件能够采用xmlFile"proxool.xml"或者propertyFile"proxool.properties"数据库

"proxool.xml"格式以下：服务器

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <proxool-config>
 3    <proxool>
 4       <alias>Pool_dbname</alias>
 5       <driver-url>jdbc:mysql://localhost:3306/dbname</driver-url>
 6       <driver-class>com.mysql.jdbc.Driver</driver-class>
 7       <driver-properties>
 8       <property name="user" value="yourname"/>
 9       <property name="password" value="yourpass"/>
10       </driver-properties>
11       <house-keeping-sleep-time>60000</house-keeping-sleep-time>
12       <maximum-connection-count>20</maximum-connection-count>　
13       <minimum-connection-count>2</minimum-connection-count>
14       <prototype-count>0</prototype-count>
15       <simultaneous-build-throttle>20</simultaneous-build-throttle>
16       <house-keeping-test-sql>select CURRENT_DATE</house-keeping-test-sql>
17       <statistics>15s,10m,1d</statistics>
18       <statistics-log-level>INFO</statistics-log-level>
19    </proxool>
20    <proxool>
21     <!--能够配置多个库-->
22    </proxool>
23 </proxool-config>

"proxool.properties"格式以下：app

 1 jdbc-0.proxool.alias=Pool_dbname
 2 jdbc-0.proxool.driver-url=jdbc:mysql://localhost:3306/dbname
 3 jdbc-0.proxool.driver-class=com.mysql.jdbc.Driver
 4 jdbc-0.user=yourname
 5 jdbc-0.password=yourpass
 6 jdbc-0.proxool.house-keeping-sleep-time=60000
 7 jdbc-0.proxool.house-keeping-test-sql=select CURRENT_DATE
 8 jdbc-0.proxool.maximum-connection-count=10
 9 jdbc-0.proxool.minimum-connection-count=3
10 jdbc-0.proxool.maximum-connection-lifetime=18000000
11 jdbc-0.proxool.prototype-count=3
12 jdbc-0.proxool.simultaneous-build-throttle=10
13 jdbc-0.proxool.recently-started-threshold=60000
14 jdbc-0.proxool.overload-without-refusal-lifetime=50000
15 jdbc-0.proxool.maximum-active-time=60000
16 jdbc-0.proxool.verbose=true
17 jdbc-0.proxool.trace=true
18 jdbc-0.proxool.fatal-sql-exception=Fatal error
19 
20 jdbc-2.proxool.alias=Pool_dbname2
21 ……
22 <!--能够配置多个库-->
23

3、更详细的proxool.xml的配置属性说明:
jsp

Xml代码

 1 <?xml version="1.0" encoding="ISO-8859-1"?><!--  
 2 Properties for Proxool Configurator testing. Defines the same parameters as  
 3 TestHelper.buildCompleteAlternativeProperties()  
 4 -->  
 5 <something-else-entirely xmlns="http://sumthin.else.entirely" xmlns:proxool="The latest version is available at http://proxool.sourceforge.net/xml-namespace">  
 6     <proxool:proxool>  
 7         <proxool:alias>xml-test-ns</proxool:alias>  
 8         <proxool:driver-url>jdbc:hsqldb:db/test</proxool:driver-url>  
 9         <proxool:driver-class>org.hsqldb.jdbcDriver</proxool:driver-class>  
10         <proxool:driver-properties>  
11             <proxool:property name="user" value="sa"/>  
12             <proxool:property name="password" value=""/>  
13         </proxool:driver-properties>  
14         <proxool:house-keeping-sleep-time>40000</proxool:house-keeping-sleep-time>  
15         <proxool:house-keeping-test-sql>select CURRENT_DATE</proxool:house-keeping-test-sql>  
16         <proxool:maximum-connection-count>10</proxool:maximum-connection-count>  
17         <proxool:minimum-connection-count>3</proxool:minimum-connection-count>  
18         <proxool:maximum-connection-lifetime>18000000</proxool:maximum-connection-lifetime> <!-- 5 hours -->  
19         <proxool:simultaneous-build-throttle>5</proxool:simultaneous-build-throttle>  
20         <proxool:recently-started-threshold>40000</proxool:recently-started-threshold>  
21         <proxool:overload-without-refusal-lifetime>50000</proxool:overload-without-refusal-lifetime>  
22         <proxool:maximum-active-time>60000</proxool:maximum-active-time>  
23         <proxool:verbose>true</proxool:verbose>  
24         <proxool:trace>true</proxool:trace>  
25         <proxool:fatal-sql-exception>Fatal error</proxool:fatal-sql-exception>  
26         <proxool:prototype-count>2</proxool:prototype-count>  
27     </proxool:proxool>  
28     <nothing-to-do-with-proxool>  
29         <proxool:proxool>  
30             <proxool:alias>xml-test-ns-2</proxool:alias>  
31             <proxool:driver-url>jdbc:hsqldb:db/test</proxool:driver-url>  
32             <proxool:driver-class>org.hsqldb.jdbcDriver</proxool:driver-class>  
33             <proxool:driver-properties>  
34                 <proxool:property name="user" value="sa"/>  
35                 <proxool:property name="password" value=""/>  
36             </proxool:driver-properties>  
37             <proxool:house-keeping-sleep-time>40000</proxool:house-keeping-sleep-time>  
38             <proxool:house-keeping-test-sql>select CURRENT_DATE</proxool:house-keeping-test-sql>  
39             <proxool:maximum-connection-count>10</proxool:maximum-connection-count>  
40             <proxool:minimum-connection-count>3</proxool:minimum-connection-count>  
41             <proxool:maximum-connection-lifetime>18000000</proxool:maximum-connection-lifetime> <!-- 5 hours -->  
42             <proxool:simultaneous-build-throttle>5</proxool:simultaneous-build-throttle>  
43             <proxool:recently-started-threshold>40000</proxool:recently-started-threshold>  
44             <proxool:overload-without-refusal-lifetime>50000</proxool:overload-without-refusal-lifetime>  
45             <proxool:maximum-active-time>60000</proxool:maximum-active-time>  
46             <proxool:verbose>true</proxool:verbose>  
47             <proxool:trace>true</proxool:trace>  
48             <proxool:fatal-sql-exception>Fatal error</proxool:fatal-sql-exception>  
49             <proxool:prototype-count>2</proxool:prototype-count>  
50         </proxool:proxool>  
51     </nothing-to-do-with-proxool>  
52 </something-else-entirely>  
53

属性列表说明:测试

fatal-sql-exception: 它是一个逗号分割的信息片断.当一个SQL异常发生时,他的异常信息将与这个信息片断进行比较.若是在片断中存在,那么这个异常将被认为是个致命错误(Fatal SQL Exception ).这种状况下,数据库链接将要被放弃.不管发生什么,这个异常将会被重掷以提供给消费者.用户最好本身配置一个不一样的异常来抛出.

fatal-sql-exception-wrapper-class:正如上面所说,你最好配置一个不一样的异常来重掷.利用这个属性,用户能够包装SQLException,使他变成另一个异常.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链接的状态,并判断是否须要销毁或者建立.

house-keeping-test-sql: 若是发现了空闲的数据库链接.house keeper 将会用这个语句来测试.这个语句最好很是快的被执行.若是没有定义,测试过程将会被忽略。

injectable-connection-interface: 容许proxool实现被代理的connection对象的方法.

injectable-statement-interface: 容许proxool实现被代理的Statement 对象方法.

injectable-prepared-statement-interface: 容许proxool实现被代理的PreparedStatement 对象方法.

injectable-callable-statement-interface: 容许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: 若是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.因此确认一下你的服务器的带宽.而后定一个合适的值.默认是5分钟.

maximum-connection-count: 最大的数据库链接数.

maximum-connection-lifetime: 一个线程的最大寿命.

minimum-connection-count: 最小的数据库链接数

overload-without-refusal-lifetime: 略

prototype-count: 链接池中可用的链接数量.若是当前的链接池中的链接少于这个数值.新的链接将被创建(假设没有超过最大可用数).例如.咱们有3个活动链接2个可用链接,而咱们的prototype-count是4,那么数据库链接池将试图创建另外2个链接.这和 minimum-connection-count不一样. minimum-connection-count把活动的链接也计算在内.prototype-count 是spare connections 的数量.

recently-started-threshold: 略

simultaneous-build-throttle: 略

statistics: 链接池使用情况统计。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: 若是为true,那么每一个被执行的SQL语句将会在执行期被log记录(DEBUG LEVEL).你也能够注册一个ConnectionListener (参看ProxoolFacade)获得这些信息.

verbose: 详细信息设置。参数 bool 值

4、还能够配置管理proxool的servlet

Xml代码

 1 <?xml version="1.0" encoding="UTF-8"?>  
 2 <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"  
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
 4     xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   
 5     http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">  
 6 <servlet>  
 7   <servlet-name>ServletConfigurator</servlet-name>  
 8   <servlet-class>  
 9     org.logicalcobwebs.proxool.configuration.ServletConfigurator  
10   </servlet-class>  
11   <init-param>  
12     <param-name>xmlFile</param-name>  
13     <param-value>WEB-INF/proxool.xml</param-value>  
14   </init-param>  
15   <load-on-startup>1</load-on-startup>  
16 </servlet>  
17   
18 <servlet>  
19   <servlet-name>Admin</servlet-name>  
20   <servlet-class>  
21     org.logicalcobwebs.proxool.admin.servlet.AdminServlet  
22   </servlet-class>  
23 </servlet>  
24 <servlet-mapping>  
25   <servlet-name>Admin</servlet-name>  
26   <url-pattern>/admin</url-pattern>  
27 </servlet-mapping>  
28 <!-- 配置受保护域，只有Tomcat管理员才能察看链接池的信息 -->  
29 <security-constraint>  
30   <web-resource-collection>  
31       <web-resource-name>proxool</web-resource-name>   
32       <url-pattern>/admin</url-pattern>  
33   </web-resource-collection>  
34   <auth-constraint>  
35      <role-name>manager</role-name>   
36      </auth-constraint>  
37   </security-constraint>  
38  <login-config>  
39      <auth-method>BASIC</auth-method>   
40      <realm-name>proxool manager Application</realm-name>   
41   </login-config>  
42   <security-role>  
43     <description>The role that is required to log in to the Manager Application</description>   
44      <role-name>manager</role-name>   
45  </security-role>  
46   <error-page>  
47     <error-code>401</error-code>  
48     <location>/401.jsp</location>  
49   </error-page>  
50 </web-app>