Injecting Common ServiceRegistry

While customizing alfresco we need serviceRegistry many times to get various service.
Lets make it utility and keep it singleton.

AlfrescoServiceRegistry.java

/**

 * Singleton service registry
 * @author ghanshyam
 */
public final class AlfrescoServiceRegistry
{
 private static ServiceRegistry serviceRegistry;
       private AlfrescoServiceRegistry()
    {
     //private constructor
    }
      public static void setServiceRegistry(final ServiceRegistry serviceRegistry)
    {
        AlfrescoServiceRegistry.serviceRegistry = serviceRegistry;
    }
      public static ServiceRegistry getServiceRegistry()
    {
        return AlfrescoServiceRegistry.serviceRegistry;
    }
}

ServiceRegistryBean.java

public class ServiceRegistryBean 
{ 
    private ServiceRegistry serviceRegistry; 
    public ServiceRegistry getServiceRegistry() 
     { 
         return serviceRegistry; 
     } 
   public void setServiceRegistry(ServiceRegistry serviceRegistry) 
   { 
         this.serviceRegistry = serviceRegistry;
         AlfrescoServiceRegistry.setServiceRegistry(this.serviceRegistry); 
   } 
}

custom-context.xml

<bean id="AlfrescoServiceBean" class="com.poc.utility.ServiceRegistryBean"> 

       <property name="serviceRegistry">  

          <ref bean="ServiceRegistry" />  

      </property>  

</bean>