Re: Executing multiple methods on same java instance

3 May 2007 11:14:43 -0700
Thanks Arne and Daniel for your inputs.

I hope the following code snippet could explain my scenario better. I
have a Object locator method which based on config properties, does a
EJB look up for home object or a POJO instantiation and provides the
Object back.

While doing so, it also places the object reference in a HashMap for
future use.
Now I am not sure if this would be tread safe with the entire class
being a singleton class.

if (businessServices.get(taskId) != null) {
    obj = businessServices.get(taskId);
             /String serviceType =

    //if the business service is of JNDI type , it will proceed in the
else part
         if((serviceType != null) &&
                Context initialContext = new InitialContext(env);
                obj = initialContext.lookup(jndiName);
    Class clazz = Class.forName(homeClass) ;
    Object home = (EJBHome) PortableRemoteObject.narrow(obj, clazz);
    obj = home;
    businessServices.put(taskId, obj);

         }else if ((serviceType != null) &&
    obj = Class.forName(className);
    businessServices.put(taskId, obj);
  return obj;

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