[EMAIL PROTECTED] wrote:
>
> Rafal,
>
> It seems that the code below doesn't work as it was meant to. As
> newInstance() is static, bootstrap() will not call the subclassed version of
> it but the local one. Sorry to bother you so much with my small problem, but
> a working solution would be to simply let the static instance member to be
> protected either at the BaseServiceBroker level or at the TurbineServices
> level. Then it's the task of the extending subclass to implement a safe
> bootstrap() assigning the customized broker.
Yeah, it seems that I tired to be too smart ;-)
What about that:
public class BaseServiceBroker
extends BaseInitableBroker
implements ServiceBroker
{
/** The single instance of this class */
protected static ServiceBroker instance = null;
/**
* This methods allows access to the single instance of this class
* existing in the system.
*
* If the call occurs before the first call to {@link
#bootstrap(Object)}
* is made, <code>null</code> will be returned.
*
* @returns The ServiceBroker instance.
*/
public static ServiceBroker getInstance()
{
return instance;
}
/**
* This method creates new ServiceBroker instance for the system.
*
* The ServiceBroker implementation must provide an implementation
* of bootstrap methods that meeds the following requirements:
* <ul>
* <li> If there is an instance of ServiceBroker running, it should
be
* shut down.
* <li> All essentional services should be initialized by the time
this
* method returns.
* <li> Precautions should be taken against concurrent execution of
* this method by multiple threads.
* </ul>
*
* @param data The implementation dependent data used to create
* the essential services.
*/
public static abstract ServiceBroker bootstrap(Object data);
// ...
}
Rafal
--
Rafal Krzewski
Senior Internet Developer
mailto:[EMAIL PROTECTED]
+48 22 8534830 http://e-point.pl
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