Accessing osgi:service from service unit

[bestrafer]

Hi 

The goal is to get a reference to the configured datasource through JNDI. 
In service unit (non-OSGI) I try: 

        InitialContext namingContext = new InitialContext(); 
        DataSource dataSource = (DataSource)
namingContext.lookup("osgi:services/javax.sql.DataSource/(osgi.jndi.service.name=MyDataSource)");
 
        Connection con = dataSource.getConnection(); 


and got Exception: 

javax.naming.NoInitialContextException: Need to specify class name in
environment or system property, or as an applet parameter, or in an
application resource file:  java.naming.factory.initial 
        at
javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:645) 
        at
javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:288) 
        at
javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:325) 
        at javax.naming.InitialContext.lookup(InitialContext.java:392) 


Here is my configuration in SMX4.3 

Budles successfully deployed: 
postgres driver as osgi bundle
c3p0 pool as osgi bundle
c3p0-postgres osgi fragment to inject the driver dependency to the pool

C3P0 datasource is configured as osgi service through jndi.xml and hot
deployed. I can see this service in the OSGI registry: 

<?xml version="1.0" encoding="UTF-8"?> 
<blueprint 
    xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0";
    xmlns:cm="http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.0.0";
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
    xsi:schemaLocation="http://www.osgi.org/xmlns/blueprint/v1.0.0
http://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd";>

    <cm:property-placeholder persistent-id="example.db"/>
        <bean id="datasourceBean"
class="com.mchange.v2.c3p0.ComboPooledDataSource" 
                destroy-method="close">
                <property name="driverClass" value="${jdbc.driverClass}"/>
                <property name="jdbcUrl" value="${jdbc.url}"/>
                <property name="user" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
                       ... 
        </bean>
        
        <service id="datasourceService" interface="javax.sql.DataSource"
ref="datasourceBean">  
                <service-properties>  
                        <entry key="osgi.jndi.service.name"
value="MyDataSource"></entry>  
                </service-properties>  
        </service>  
</blueprint>

Any clue why I can't get initial context from SU? 

Regards, 
Anatoliy

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