CharityRepository.java

private <T> CompletionStage<T> wrapContext(Supplier<T> toRun) {
    return supplyAsync(toRun, executionContext); // here we are passing the context to run the method in, this means this is running in our new actor context
}
 // and here is the magic, we are returning async and we are doing it in the context of executionContext. For the JS folk this is like using call or apply, we are saying do this call, but do this call within a different context than the http thread you were called from

public CompletionStage<List<Charity>> findList() {
    return wrapContext(() -> ebeanServer.find(Charity.class).findList());
}