Child injectors were designed in part for this very use case! If child injectors had been in 1.0, we probably wouldn't have scopes.
Bob On Mon, Dec 19, 2016 at 11:36 PM, Greg Methvin <[email protected]> wrote: > Hi everyone, > > I currently one of the maintainers of Play Framework, a Java/Scala web > framework that integrates with Guice. Play uses non-blocking I/O, and since > one thread may handle multiple requests at once, we can't use thread locals > to scope dependencies. > > So I'm wondering if there is a recommended way to bind instances only in > the context of a particular object (like a request) without using any > global or thread-local state. > > I can basically do what I want by creating a child injector for each > request. The child injector also binds the request and a module with > request-scoped dependencies. It then uses that injector to obtain an > instance of the relevant controller to handle the request, which may have > dependencies bound that use the request instance. Of course that means you > need to create a new child injector per request, which doesn't seem like a > good idea. > > Does it make sense to use Guice to solve this problem? Is there a better > way to do it than what I've tried? > > Thanks, > Greg > > -- > 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 [email protected]. > To post to this group, send email to [email protected]. > 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/7494eddd-a7ea-4351-965a-2b3d96c8f14f%40googlegroups.com > <https://groups.google.com/d/msgid/google-guice/7494eddd-a7ea-4351-965a-2b3d96c8f14f%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- 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 [email protected]. To post to this group, send email to [email protected]. 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/CAGmsiP48Vfsn8v-x18j1Um-JnNXmovi2wg52uPM1M52bToabcA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
