I think that you're looking for Assisted Inject:
http://code.google.com/p/google-guice/wiki/AssistedInject
On Thu, Jul 5, 2012 at 9:14 PM, cheez <u.int.3...@gmail.com> wrote:
> I have a FTP client which has multiple servers configured by the user at
> runtime:
>
> class FTPConnection
> {
> FTPConnection(ServerInfo server, UserInfo user)...
> }
>
> I also have a client class which does something with the connection:
>
> class DoSomethingWithFTP
> {
> DoSomethingWithFTP(FTPConnection conn)...
> }
>
> For example, one type of DoSomethingWithFTP might be a
> DownloadAllTheThings process. What I'd like to do is have a notion of a
> "current connection" which is analogous to the "current user". Nevermind
> that I probably wouldn't write code like this, all I want to do is figure
> out how I would inject the "current" FTP connection!
>
> So as you can see, a FTP connection requires some server info and user
> info. This is where I get stuck. The "current connection" is tied to these
> two values and they need to be injected into the FTPConnection.
>
> If it was a web app, I might scope these values to the session but what if
> I wanted to process all of them at once, in multiple threads?
>
> The pseudo-code I'd like to write is this:
>
> foreach( pair<UserInfo,ServerInfo> config : whatever() )
> {
> makeNewThreadAndProcessThisSite(config);
> }
>
> This is a very simplified view of the whole thing. I probably will not
> write code like this but I think it's an approximate proxy for the problem
> I am really trying to solve.
>
> Would you kindly help me tease out a solution?
>
> Thanks!
>
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