org.telegram.telegrambots.bots.AbsSender#executeAsync throws exception

[n0mer]

hello,

org.telegram.telegrambots.bots.AbsSender#executeAsync throws org.telegram.telegrambots.exceptions.TelegramApiException although there is callback function org.telegram.telegrambots.updateshandlers.SentCallback#onException present.

[bvn13]

more code please

[n0mer]

@bvn13 sorry, what code do you need?

Here is signature of AbsSender#executeAsync: https://github.com/rubenlagus/TelegramBots/blob/master/telegrambots-meta/src/main/java/org/telegram/telegrambots/bots/AbsSender.java#L39

public <T extends Serializable, Method extends BotApiMethod<T>, Callback extends SentCallback<T>> void executeAsync(Method method, Callback callback) throws TelegramApiException

Second parameter - Callback; Callback has onException method.

So i'm wondering why not send exception thrown via that onException, w/out declaring that the whole executeAsync method throws TelegramApiExceptoin.

[rubenlagus]

It throws it because it has to validate that both parameters are not-null. If any of them is null, an exception is thrown right away.

[n0mer]

@rubenlagus but why this is not done in callback's onException method?

[rubenlagus]

@n0mer Because this exception is throw if you provide a null callback, in such a case, it is imposible to call onException method.

In addition, the callback is intended for error occurring during method execution, not for errors occurred before it is actually executed