This could indeed be a possible solution. To be honest I haven't thought of
this approach. I chose my implementation because it was given as best
practice on using Singleton's in Javascript, and it seemed to have the most
in common with Singleton implementations in for example C# or Java. I've
got my solution working (See reply on Bryan), otherwise I would have gone
for your approach, which basically gives the same result.
Op woensdag 26 maart 2014 04:42:03 UTC+1 schreef Bryan Donovan:
>
> I might be missing the purpose of your factory, but maybe you can just
> implement it like this:
>
> function PluginFactory() {
> //
> }
>
> exports.PluginFactory = new PluginFactory();
>
>
> As long as you don't mess with the require cache, I think that would
> effectively be a singleton. Maybe there are other reasons to implement the
> singleton like you did though.
>
> -Bryan
>
>
> On Tuesday, March 25, 2014 6:50:27 AM UTC-6, [email protected] wrote:
>>
>> Hi,
>>
>> So i'm having problems with my architecture of my node application, I
>> know the problem, I'm just trying to find the best solution.
>>
>> My problems is exactly the same as:
>> https://groups.google.com/forum/#!topic/nodejs/u_9IE2z_6rM
>>
>> Only I'm using a Factory class to create plugins of the type "IPlugin".
>> These plugins have certain actions, called PluginAction.
>>
>> A PluginAction has a field plugin, which refers to its parent plugin.
>> When serializing to JSON, i replace the plugin object with a string
>> identifier, pointing to the correct plugin.
>>
>> My PluginFactory can retrieve a plugin using retrieve(identifier). The
>> problem occurs when I try to deserialize a given PluginAction.
>>
>> At that point I would like to convert the plugin identifier back to the
>> plugin object, by retrieving it from the Factory. This is where it goes
>> wrong.
>>
>> I understand this could be a bit hard to follow, so I've included a part
>> of my class diagram, which might clarify it more. Short summary:
>>
>>
>> 1. PluginFactory.initialize() loads all plugins in a certain
>> directory using require()
>> 2. PluginAction.toJSON() changes the plugin object to a string
>> containing the plugin identifier
>> 3. PluginAction.fromJSON() when trying to retrieve the plugin object
>> using the PluginFactory, I cannot load the PluginFactory file.
>>
>>
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