Datasource routing using AbstractRoutingDataSource with JNDI

Hi,
I am required to do datasource routing using AbstractRoutingDataSource.java in my web application. We are using JNDI for datasource mapping. Here's the code:

----------------------DynamicDatasourceRouter.java--------------------
package com.walmart.eai.util;
import java.sql.SQLException;
import java.sql.Wrapper;
import javax.sql.DataSource;
import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;

public class DynamicDatasourceRouter extends AbstractRoutingDataSource{
            
    @Override
    protected Object determineCurrentLookupKey()
    {
       return EnvironmentContextHolder.getEnvironmentType();
          
    }
   
}


--------------------------------EnvironmentContextHolder.java-------------------------------------------
package com.walmart.eai.util;

public class EnvironmentContextHolder {
      

      private static final ThreadLocal<EnvironmentType> contextHolder = new ThreadLocal<EnvironmentType>();

      public static void setEnvironmentType(EnvironmentType environmentType){
      if (environmentType == null) System.out.println("EnvironmentType cannot be null");
      contextHolder.set(environmentType);
      }

      public static EnvironmentType getEnvironmentType(){
      return (EnvironmentType) contextHolder.get();
      }

      public static void clearEnvironmentType(){
      contextHolder.remove();
      }

}

---------------------------------------EnvironmentType.java------------------------
package com.walmart.eai.util;

public enum EnvironmentType {
      C1,
      C2,
      }

------------------------------------applicationContext.xml------------------
<bean id="eaiDataSource" class="com.walmart.eai.util.DynamicDatasourceRouter">
            <property name="targetDataSources">
             <map key-type="com.walmart.eai.util.EnvironmentType">
            <entry key="C1" value="JNDI1" />
                        <entry key="C2" value="JNDI2" />
                        
                  </map>
            </property>
            <property name="defaultTargetDataSource" value="JNDI1" />
            
      </bean>

---------------------------------------------------------------------------------------------
I am setting the value of the EnvironmentType of the EnvironmentContextHolder just before querying the DB as follows:
EnvironmentContextHolder.setEnvironmentType(EnvironmentType.C2);

-----------------------------------------------------------------------------------------------
But this not working. Where am I going wrong?