Multi-tenant webapp using Spring MVC and Hibernate 4.2.0.Final

I have developed a small webapp using and SpringMVC(3.1.3.RELEASE) and Hibernate 4.2.0.Final.

I'm trying to convert it to be a multi-tenant application.

Similar topics have been covered in other threads, but I couldn't find a definitive solution to my problem.

What I am trying to achieve is to design a web app which is able to:

1. Read a datasource configuration at startup (an XML file containing multiple datasource definitions, which is placed outside the WAR file and it's not the application-context or hibernate configuration file)

2. Create a session factory for each one of them (considering that each datasource is a database with a different schema).

3. How can i set my session factory scope as session? ( OR Can i reuse the same session factory ?) .

Example:

 Url for client a - URL: http://project.com/a/login.html
 Url for client b - URL: http://project.com/b/login.html

If client "a" make request,read the datasource configuration file and Create a session factory using that XML file for the client "a".

This same process will be repeating if the client "b" will send a request.

What I am looking, how to implement datasource creation upon customer subscription without editing the Spring configuration file. It needs to be automated.

Here is my code ,that i have done so far.

Please anyone tell me,What modifications i need to be made?

Please give an answer with some example code..I am quite new in spring and hibernate world.

Spring.xml

  <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close" p:driverClassName="${jdbc.driverClassName}"

        p:url="${jdbc.databaseurl}" 
p:username="${jdbc.username}" p:password="${jdbc.password}" />

    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="configLocation">
            <value>classpath:hibernate.cfg.xml</value>
        </property>

        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">${jdbc.dialect}</prop>
                <prop key="hibernate.show_sql">true</prop>
            </props>
        </property>
    </bean>

<bean id="transactionManager"
        class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />

JDBC.properties File

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.dialect=org.hibernate.dialect.MySQLDialect
jdbc.databaseurl=jdbc:mysql://localhost:3306/Logistics
jdbc.username=root
jdbc.password=rot@pspl#12

hibernate.cfg.xml File

<?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>
    <mapping class="pepper.logis.organizations.model.Organizaions" />
    <mapping class="pepper.logis.assets.model.Assets" />

</session-factory>
</hibernate-configuration>

Thanks,