I am using Guice's RequestScoped and Provider in order to get instances of some classes during a user request. This works fine currently. Now I want to do some job in a background thread, using the same instances created during request. However, when I call Provider.get(), guice returns an error:
Error in custom provider, com.google.inject.OutOfScopeException: Cannot
access scoped object. Either we are not currently inside an HTTP Servlet
request, or you may have forgotten to apply
com.google.inject.servlet.GuiceFilter as a servlet
filter for this request.
afaik, this is due to the fact that Guice uses thread local variables in order to keep track of the current request instances, so it is not possible to call Provider.get() from a thread different from the thread that is handling the request.
How can I get the same instances inside new threads using Provider? It is possible to achieve this writing a custom scope?