在persistence.xml中引用Tomcat JNDI数据源

问题描述

在server.xml中，我定义了全局资源（我使用 Tomcat 6 ）：

 < GlobalNamingResources> 
< Resource name =jdbc / mydsauth =Container
 type =javax.sql.DataSource
 maxActive =10maxIdle =3maxWait =10000 
 username =sapassword =
 driverClassName =org.h2.Driver
 url =jdbc：h2：〜/ .myds / data / db
 /> 
< / GlobalNamingResources> 
  

我在catalina.out中看到这是绑定的，所以我认为没关系。

在我的web应用程序中，我有链接到数据源的链接，但我不确定它是否正常：

 <语境GT; 
< ResourceLink global ='jdbc / myds'name ='jdbc / myds'type =javax.sql.Datasource/> 
< / Context> 
  

，并且在应用程序中有persistence.xml：

 < persistence xmlns =http://java.sun.com/xml/ns/persistence
 xmlns：xsi =http：//www.w3 .org / 2001 / XMLSchema-instance
 xsi：schemaLocation =http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0 .xsd
 version =2.0> 
< persistence-unit name =oamtransaction-type =RESOURCE_LOCAL> 
< provider> org.hibernate.ejb.HibernatePersistence< / provider> 
<非-jta-data-source> jdbc / myds< / non-jta-data-source> 
  
<属性> 
< property name =hibernate.dialectvalue =org.hibernate.dialect.H2Dialect/> 
< / properties> 
< / persistence-unit> 
< /余辉> 
  

它应该没问题，但最可能的是这个或ResourceLink定义是错误的，因为我得到：
$ b

What's wrong and why this does not work?

UPDATE:

I've tried to get the datasource directly:

public class WebAppListener implements ServletContextListener
{
    // ServletContextListener interface - start
    public void contextInitialized(ServletContextEvent sce)
    {
        try
        {
            Context initCtx = new InitialContext();
            Context envCtx = (Context) initCtx.lookup("java:comp/env");
            DataSource ds = (DataSource)
            envCtx.lookup("jdbc/myds");
        }
        catch (NamingException ex)
        {
            System.out.println("!!!! Got NamingException:");
            ex.printStackTrace(System.out);
        }
    }

    public void contextDestroyed(ServletContextEvent sce) { }

}

my web.xml:

  <listener>
    <display-name>Listener</display-name>
    <listener-class>WebAppListener</listener-class>
  </listener>

Still getting the same error although I see the datasource in JMX console when I connect to the Tomcat(Catalina - Datasource - javax.sql.Datasource = "jdbc/myds" :ObjectName = Catalina:type=DataSource,class=javax.sql.DataSource,name="jdbc/myds". )

解决方案

The <non-jta-data-source> in persistence.xml should be

java:comp/env/jdbc/myds

as per the response in http://forums.oracle.com/forums/thread.jspa?messageID=1899677

And also is your db driver in $CATALINA_HOME/lib

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