I did this for a Guice-based framework I built of top of Netty - https://github.com/timboudreau/acteur - as follows:
First, some base classes for custom scopes: https://github.com/timboudreau/scopes And basically, since my code controls thread dispatch, you simply wrap any Runnable/Callable that is going to expect to be able to inject request-specific objects in another Runnable/Callable that first re-enters the scope with the same objects it had before. You can make this even more transparent by wrapping an ExecutorService with one which: - Whenever new work is scheduled *from* a thread that is already in-scope, it is wrapped in such a Runnable/Callable Now, whether Play has the entry points you'd need to control dispatch in this way, I don't know. But basically, when a request comes in, you fill up a bag with the objects you want to be injectable, and "enter" the scope with them. When the request processing code schedules something, you give it a copy of that bag, and before the code to be scheduled is invoked, you re-enter the scope with its former contents. pseudocode example: ReentrantScope scope = ... public void schedule(Runnable r) { // assume this is a thread pool, whatever thread mgmt mechanism you or Play uses super.schedule (new ScopedRunnable(r)); } ... class ScopedRunnable implements Runnable { final Object[] contents; final Runnable delegate; ScopedRunnable(Runnable delegate) { this.contents = scope.contents(); this delegate = delegate; } public void run() { scope.enter(contents); try { delegate.run(); } finally { scope.exit(); } } (that's fairly rough code, but hopefully you get the idea - there are some convenience methods in the scopes library to make this sort of thing simple). -Tim -- You received this message because you are subscribed to the Google Groups "google-guice" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-guice+unsubscr...@googlegroups.com. To post to this group, send email to google-guice@googlegroups.com. Visit this group at https://groups.google.com/group/google-guice. To view this discussion on the web visit https://groups.google.com/d/msgid/google-guice/da536895-2895-4133-bbc8-ea10c6a47403%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
