Hibernate & Proxool or C3p0

一、Hibernate with Proxool

 

     1、基本環境搭建

 

           Hibernate 必須jar包，Porxool以0.9.1爲列，將proxool-0.9.1.jar、proxool-cglib.jar放入classpath中

 

     2、hibernate配置文件

 

           以oracle 10爲例

      <?xml version='1.0' encoding='UTF-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!-- 連接池 --> <property name="hibernate.proxool.pool_alias">dbpool</property> <property name="hibernate.proxool.xml">proxool.xml</property> <property name="connection.provider_class">org.hibernate.connection.ProxoolConnectionProvider</property> <property name="dialect">org.hibernate.dialect.OracleDialect</property> <property name="current_session_context_class">thread</property> <property name="hbm2ddl.auto">update</property> <property name="show_sql">false</property> <property name="format_sql">true</property> <!-- 二級緩 --> <property name="hibernate.cache.use_second_level_cache">true</property> <property name="hibernate.cache.use_query_cache">true</property> <property name="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</property> <property name="hibernate.generate_statistics">true</property> <property name="hibernate.connection.autocommit">true </property> <!-- mapping --> </session-factory> </hibernate-configuration>

 

    3、proxool配置文件

 

         proxool.xml

     <?xml version="1.0" encoding="utf-8"?> <something-else-entirely> <proxool> <alias>dbpool</alias> <driver-url>jdbc:oracle:thin:@xxxx:1521:sid </driver-url> <driver-class>oracle.jdbc.driver.OracleDriver </driver-class> <driver-properties> <property name="user" value="xxxx" /> <property name="password" value="xxxx" /> </driver-properties> <house-keeping-sleep-time>90000</house-keeping-sleep-time> <prototype-count>2</prototype-count> <maximum-connection-count>10</maximum-connection-count> <minimum-connection-count>5</minimum-connection-count> <proxool.simultaneous-build-throttle>100</proxool.simultaneous-build-throttle> <house-keeping-test-sql>select CURRENT_DATE from dual</house-keeping-test-sql> </proxool> </something-else-entirely>

     Note:不同數據庫<house-keeping-test-sql />寫法不一樣，比如如果是mysql，select current_date(sysdate)

 

    4、web.xml

 

      連接池監控

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

 

      可以通過http://xxxx:port/xxx/proxool 查看連接池的具體情況

 

      參考：

      http://proxool.sourceforge.net/

 

 

 二、Hibernate with C3P0

 

       C3P0爲HB默認的連接池。

 

       1、所需C3P0 jar包，（c3p0-0.9.1.2.jar）

 

       2、hibernate配置文件

 

        <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!-- org.hibernate.dialect.OracleDialect --> <property name="hibernate.dialect"> org.hibernate.dialect.OracleDialect </property> <property name="hibernate.connection.driver_class"> oracle.jdbc.driver.OracleDriver </property> <property name="hibernate.connection.url"> jdbc:oracle:thin:@xxxx:1521:sid </property> <property name="hibernate.connection.username"> username </property> <property name="hibernate.connection.password"> password </property> <!-- this property is for JNDI --> <!-- <property name="hibernate.session_factory_name"> hibernate/SessionFactory </property> --> <!-- this property is for JNDI --> <!-- <property name="hibernate.connection.datasource">java:comp/env/jdbc/ssoportal</property> --> <property name="hibernate.show_sql">true</property> <!-- Bind the getCurrentSession() method to the thread. If the value is managed, the session should be closed manually after a transaction --> <property name="current_session_context_class">thread</property> <!-- Hibernate annotation mapping classes --> </session-factory> </hibernate-configuration>