Question

GAE restricts new Thread instances from being created at runtime. Guava has a nice EventBus and I think I’d like to use it in an upcoming GAE project.

But I don’t want to even start down that road if I’m going to run into any thread-related access restrictions. So I ask: does Guava’s EventBus utilize thread creation? Is it GAE-friendly?

Answer 1

Looks like you can create an AsyncEventBus with a GAE thread factory:

//GAE Thread Factory
ThreadFactory factory = ThreadManager.currentRequestThreadFactory();
Executor executor = Executors.newCachedThreadPool(factory)
//AsyncEventBus
EventBus eventBus = new AsyncEventBus(executor);

See also: https://developers.google.com/appengine/docs/java/runtime