dependency injection - What if I want to have my own plug-in architecture within Grails? -

-

Let's say I want to define an interface, a duplicate, and then many implementations of the interface available on runtime (maybe even as personal services). In my controller class, I want to be able to make all known implementations of this interaction interface on runtime so that I can highlight the user as "option" to get different types of "foo" items. This will allow my server-side code to be more modular and many people will be allowed to define different ways of plugging in the phupro provider services.

What I see, Grails only gives me the option of an injection. Example of a service implementation in my controller / domain classes Grails is a way to injection multiple instances of a service based on an interface type ? I think I am parallel with the ability to inject the implementation of an interface available in OSGi's OSGi container ... any ideas?

Grails uses spring below, so that you can inject many services in your controller like you Whether you know Spring

But I think there is a possible reason to do this. When you start putting many services in the controller, it is the controller, on which they take the order, in which they are called. It seems like a workflow to me at that time, something that is best left in a service.

Controllers are part of the web level. You can not open that process in front of the client which comes through a channel other than the web-level if it is buried in the controller.

I recommend that you do not do this, even if this is possible. It seems like a complicated use case in another service that a better idea would have to be revealed. Explain it and hide details from customers. These are the things - hide complication.


Comments

Post a Comment

Popular posts from this blog

oracle - The fastest way to check if some records in a database table? -

-
I have a big table to work with. I have to see that there are some records whose parent_id is equal to my passing value. Currently I do this by implementing "my_table using select count (*) where parent_id =: id"; If the result> 0, it means that they exist. Because this is a very large table, and I do not care what the actual number of records present, I just want to know if it exists, so I think count (*) Bit is disabled. How do I apply this requirement most quickly? I'm using Oracle 10. # Tips for Hibernation & amp; Tricks It suggests writing in such a way: Integer number = (integer) session .createQuery ("Select Count (*) to ...."). UniqueResult (); I do not know what is the magic of the unique rule? Why does it fast? To compare, select "1 from mytable where parent_id = passId and rowrum", which is more efficient? If you are not interested in the number of records, then there is an EXISTS query one: Select 'y'
Read more

php - multilevel menu with multilevel array -

-
Just ask someone to solve this problem? I want to create a multilevel menu I can not find the right solution generated with multilevel array, it always gets an array_push error My study came from the original idea But still my Can not match the need. This is my MySQL [code] ----- --------------------- --------------- | ID | PARENT_ID | Name | Link | Seq | 1 | 0 | Dashboad | Dashboard / | 1 | 2 | 0 | Menu 1 | Menu 1 / | 2 | 3 | 0 | Menu 2 | Menu 2 / | 3 | 4 | 0 | Menu 3 | Menu 3 / | 4 | 5 | 2 | Joint Add / | 1 | 6 | 3 | Joint Add / | 1 | 7 | 2 | Edit | Edit / | 2 | 8 | 4 | Joint Add / | 1 ------------------------------------------ [/ Code] I want to do something like this in my array array ('dashboard' = & gt; array ('id' = & gt; '' 'Dame' = & gt; 'Dashboard', 'Title' = & gt; 'Dashboard', 'MatchMin' = & gt; Base_URL (). 'Dashboard /', 'Active' => = & Gt; NULL), &
Read more

jQuery UI: Datepicker month format -

-
I am trying to change the format of the month that shows in the popup (not in the date that the picker actually I do not have any choice anywhere to do this, do I like to use a sub-string () or something else? What I normally display is Trying to change: Class = "ui-datepicker-title"> January & lt; / span & gt; ... & lt; / div & gt; Div>
Read more