Retry when IOException example DroidconIN 2016

Retry.java

//Retry when IOException
    Observable<UserResponse> getUserFromServer() {
        return userService.getUserFromServer()
                .retryWhen(new Func1<Observable<? extends Throwable>, Observable<?>>() {
                    @Override
                    public Observable<?> call(Observable<? extends Throwable> observable) {
                        return observable.flatMap(new Func1<Throwable, Observable<?>>() {
                            @Override
                            public Observable<?> call(Throwable throwable) {
                                if (throwable instanceof IOException) {
                                    //retry only when we get no internet IOException
                                    return Observable.just(null);
                                }
                                return Observable.error(throwable);
                            }
                        });
                    }
                });
    }