private static <T> Action1<Notification<? super T>> debug(String desc) {
Function<String, Action1<Notification<? super T>>> debugger =
(prefix) -> {
AtomicReference<String> nextOffset = new AtomicReference<String>(">");
return (Notification<? super T> notif) -> {
if (notif == null) {
logger.error("null notification.");
}
switch (notif.getKind()) {
case OnNext:
{
logger.printf(Level.INFO, "%s %s %s", prefix, nextOffset.get(), notif.getValue());
nextOffset.getAndUpdate(str -> str + "-");
break;
}
case OnError:
{
logger.printf(Level.ERROR, "%s %s", prefix, notif.getThrowable().getMessage());
break;
}
case OnCompleted:
{
logger.printf(Level.ERROR, "%s %s", prefix, "completed");
break;
}
default:
logger.error("Unsupport operation");
}
};
};
return debugger.apply(desc);
}
