I've come across an issue in my application where I am checking for a specific error (lets say error 9000) in the onError of many different subscriptions. All of them may or may not handle the error in the same way. Rather than doing a check if(error == 9000) in the OnError of these subscriptions is there a way to create a custom Observable or operator that checks for this error specifically or maybe something like a .doOn9000Error()
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You could write a simple function handleErr9000 which takes an Observable, and transforms it into one which correctly deals with error 9000. The onErrorResumeNext operator is what you need: It takes a function which gets the error which occurred, and can decide, depending on the kind of error, what Observable sequence to continue with.
public static <T> Observable<T> handleErr9000(Observable<T> o) { return o.onErrorResumeNext(new Func1<Throwable, Observable<T>>() { public Observable<T> call(Throwable err) { if (err instanceof NumberedException && ((NumberedException) err).number == 9000) { // Handle this specific error ... // Then return Observable.error(err) if you want to keep // the error, or Observable.just(someDefaultValue) to // substitute the error by a default value, // or Observable.empty() to swallow the error return Observable.empty(); } else { // just pass on the error if it's a different error return Observable.error(err); } } }); } [I invented an exception class named NumberedException for this example, you probably already have your own exception class for this.]
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IZI_Shadow_IZI
That helped tremendously...thanks for the help, much appreciated