ibatis+jndi+transactionManager+DataSource

首先,写一个Proxool的配置文件.....放在 WEB-INF 目录下,下面是一个例子

<? 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 > proxool_alias </ alias >
         < driver-url > jdbc:oracle:thin:@127.0.0.1:1521:sid </ driver-url >
         < driver-class > oracle.jdbc.driver.OracleDriver </ driver-class >
         < driver-properties >
             < property  name ="user"  value ="user"   />
             < property  name ="password"  value ="pwd"   />
         </ driver-properties >
         < maximum-connection-count > 10 </ maximum-connection-count >
         < minimum-connection-count > 5 </ minimum-connection-count >
         < maximum-connection-lifetime > 30 </ maximum-connection-lifetime >
         < maximum-active-time > 3 </ maximum-active-time >
         < simultaneous-build-throttle > 5 </ simultaneous-build-throttle >
         < house-keeping-sleep-time > 30000 </ house-keeping-sleep-time >
         < house-keeping-test-sql > Select Sysdate Form dual </ house-keeping-test-sql >
         < prototype-count > 0 </ prototype-count >
     </ proxool >
</ something-else-entirely >

然后,当然是先把这个文件先用上,看看可不可以用

在web.xml里面配置上

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

这样在应用启动之后,就能通过以下代码来访问到数据库

    Connection conn  =  DriverManager.getConnection( " proxool.proxool_alias " );
    Statement stmt  =  conn.createStatement();
    ResultSet rs  =  stmt.executeQuery( " Select * From test " );

/*以下是重点*/
但是我们需要的是注册一个JNDI,
有2种方法
1.配置文档里面直接注册,这样配置:

<? 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 > proxool_alias </ alias >
         < driver-url > jdbc:oracle:thin:@127.0.0.1:1521:pub </ driver-url >
         < driver-class > oracle.jdbc.driver.OracleDriver </ driver-class >
         < driver-properties >
             < property  name ="user"  value ="user"   />
             < property  name ="password"  value ="pwd"   />
         </ driver-properties >
         < jndi-name > jdbc-0 </ jndi-name >
         < jndi-java .naming.factory.initial > org.apache.naming.java.javaURLContextFactory </ jndi-java.naming.factory.initial >
         < jndi-java .naming.factory.url.pkgs > org.apache.naming </ jndi-java.naming.factory.url.pkgs >
         < maximum-connection-count > 10 </ maximum-connection-count >
         < minimum-connection-count > 5 </ minimum-connection-count >
         < maximum-connection-lifetime > 30 </ maximum-connection-lifetime >
         < maximum-active-time > 3 </ maximum-active-time >
         < simultaneous-build-throttle > 5 </ simultaneous-build-throttle >
         < house-keeping-sleep-time > 30000 </ house-keeping-sleep-time >
         < house-keeping-test-sql > Select Sysdate Form dual </ house-keeping-test-sql >
         < prototype-count > 0 </ prototype-count >
     </ proxool >
</ something-else-entirely >

2.在自己的Java类里面注册JNDI
那就需要用到Proxool提供的另一个类: ProxoolJNDIHelper:

        Properties info  =   new  Properties();
        info.setProperty( " jndi-name " ,  " jdbc-0 " );
        info.setProperty( " java.naming.factory.initial " , org.apache.naming.java.javaURLContextFactory. class .getName());
        info.setProperty( " java.naming.factory.url.pkgs " ,  " org.apache.naming " );
         //  info.setProperty("java.naming.provider.url", "localhost:8888");
      try   {
            ProxoolJNDIHelper.registerDatasource("proxool_alias", info);
     }   catch  (ProxoolException e)  {
            // TODO Auto-generated catch block
            e.printStackTrace();
         }

上面所说的2中方法都能注册一个名为jdbc-0的JNDI,
可以通过以下代码来访问数据库..

        Context ctx  =   new  InitialContext();
        DataSource dataSource  =  (DataSource) ctx.lookup( " jdbc-0 " );
            
        Connection conn  =  dataSource.getConnection();

下面说明代码,
1.jndi-name好像不能用jdbc/xx这种名字,文档里面用的就是/datasources/UserDB,但是Tomcat启动就报错,可能和特殊字符有关,具体没测试
2.JNDI的几个参数(java.naming.factory.initial,java.naming.factory.url.pkgs,还有java.naming.provider.url),这些参数和容器有关,Tomcat就是这些参数
JBOSS的话就是:
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.provider.url=localhost:1099
java.naming.factory.url.pkgs=org.jboss.naming