[Opensim-dev] Splitting IUserService

[Michael Wright]

Well my initial focus was more from the region side, so that we could have it using a different server if someone wanted (like we do for our apps). But yeah I guess server side the db handling should/could be separated. 

Although I think we most likely should hold of until Ryan has finished his plugin changes, else whatever is done would need changing once that is done. 

liu xiaolu <lulurun at gmail.com> wrote: Then should we add "IAvatarData" ?

2008/6/28 Michael Wright <michaelwri22 at yahoo.co.uk>:
 Does anyone have any objections to splitting the IUserService interface, so that the Avatar Appearance and attachments are in their own interface IAvatarService ?

I really don't think we should be coupling things like we are. I'm not saying that these functions have to move off the User Server. Just on the region side, we move them into their own interface, so that if someone wants those functions to be on a different server, they can change the url of the server to be different to the user server with minor code changes. 
 
When I think about the various Servers, I generally think of the User server as holding account infomation. The Grid Server as being the general manager of the "grid". And the Inventory and Asset servers as the general datastores. 
 
So to fit in with my view, the avatar appearance data would fit better on the Inventory server or even a separate server that was part of the datastore group. This is so that we could have one central User  Server, but a number of Inventory and Asset servers. Each user's in-world data could be on a different set of those.

As I've said before, I really think we should have a system that allows the various backend functions to be where ever a grid admin thinks is best. But thats still a dream. 
 
But we can do a small change that would allow a different url to be set for the Avatar services, if a application required it.

So what I'm suggesting is we add a new interface to the CommunicationsManager, like:
 
public Interface IAvatarService
{
        AvatarAppearance GetUserAppearance(LLUUID user);

        void UpdateUserAppearance(LLUUID user, AvatarAppearance appearance);

        void AddAttachment(LLUUID user, LLUUID attach);
 
        void RemoveAttachment(LLUUID user, LLUUID  attach);

        List<LLUUID> GetAttachments(LLUUID user);
}

The OSGrid implementation could be exactly like it is now, and send the requests to the user server. I'm not even talking about adding a new setting to the ini file, but just leaving the code so it uses the UserServer url.
 
So its really a minor change, but does decouple these functions from the more general user account functions. 
           

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