Ejb 多数据源设置问题

 说明:{JBOSS_HOME}代表JBOSS程序目录

 

<1>.拷贝两个数据源(mssql和mysql)

　　　　     {JBOSS_HOME}/doc/examples/jca/mssql-ds.xml 到 {JBOSS_HOME}/server/default/deploy/mssql-ds.xml

                   {JBOSS_HOME}/doc/examples/jca/mysql-ds.xml 到{JBOSS_HOME}/server/default/deploy/mysql-ds.xml 

 

 

 

 

<?xml version="1.0" encoding="UTF-8" ?>

<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_1_0.xsd" version="1.0">

 

 <persistence-unit name="itcast" transaction-type="JTA">

 <jta-data-source>java:MySqlDS</jta-data-source>

 <class>com.lixing.bean.Person</class>     <!-- 以下两项必须定义-->

 <exclude-unlisted-classes>true</exclude-unlisted-classes>

 

 <properties>

 <property name="hibernate.hbm2ddl.auto" value="create-drop"/>  

 <property name="hibernate.show_sql" value="true"/>

 <property name="hibernate.format_sql" value="true"/>

 </properties>

 </persistence-unit>

 

 <persistence-unit name="microsoft_sql" transaction-type="JTA">

 <jta-data-source>java:microsoft_datasource</jta-data-source>

 <class>com.lixing.bean.User</class>  

 <exclude-unlisted-classes>true</exclude-unlisted-classes>

 

 <properties>  

 <property name="hibernate.hbm2ddl.auto" value="create-drop"/>

  

 <property name="hibernate.show_sql" value="true"/>

 <property name="hibernate.format_sql" value="true"/>

 </properties>

 </persistence-unit>

 </persistence>

<3>定义两个Entity Bean,并分别映射到不同的数据源(Person映射到:mysql/jbossdb数据库下　　User映射到:mssql/test数据库下)

--------------------------------------------------------------------Person---------------------------------------------------------------------------------

package com.lixing.entity;

@Entity

@Table(name="t_person",catalog="jbossdb")

public class Person{

//...

}

---------------------------------------------------------------------User.class-----------------------------------------------------------------------------

package com.lixing.entity;

@Entity

@Table(name="t_user",schema="dbo",catalog="test")

public class User{

//......

}

-----------------------------------------------------------------------------------------------------------------------------------------------------------

两处唯一不同的地方即是:Person映射到jbossdb数据库时(mysql),没有定义schema="dbo",而User映射到test数据库时(mssql),却定义了schema="dbo"