CODEWITHSUNDEEP
javahttpexception
mathkid
mathkid

Reputation: 19

Throwing a custom exception instead of other types of exceptions

I have a program in which I want to throw one of 4 exceptions that I define. I get an HTTP response and according its error code I want to throw the exceptions:

Here is an example:

public List<Map<String, Object>> getData(String product) {
    
    try {
        Response<DataGeneralResponse> response = dataApi.dataGet(product).execute();
        if (!response.isSuccessful()) {
            log.error(String.format("Failed to get data for product [%s] error [%s]",
                    product,
                    Util.getErrorMsg(response)));
        }
        DataGeneralResponse body = response.body();
        return body != null ? body.getData(): null;
    } catch (Exception e) {
                        log.error(String.format("Failed to get data for product [%s] error[%s]",
                    product,
                    Util.getErrorMsg(response)));
    }
    return null;
}

So I need to to something like that in Util:

public void handleResponse(Response<DataGeneralResponse> response) throws CustomException {
    switch (response.code()) {
        case 500: throw new FirstCustomException(");
        break;
        case 404: throw new SecondCustomException(");
        break;
        default: throw new UnknownCustomException(");
    }
}

But when I try to remove the catch clause I get unhandled IOException error on the execute method and on the getErrorMsg method.

Can someone help please?

Upvotes: 0

Views: 890

Answers (1)

Arthur Klezovich
Arthur Klezovich

Reputation: 2819

I get unhandled IOException error on the execute method and on the getErrorMsg method.

This indicates that you have a method, which is trying to throw a checked exception, which is not surrounded by a try catch clause. By Java language standard all methods, which throw checked exceptions must do one of the two ..

  • Be surrounded by a try-catch block which catches the relevant exception
  • Declare that they throw the relevant exception by using the throws keyword

You can use one of the methods above to deal with error you are getting. If this does not completely solve your problem, please add a comment below and I'll respond.

Upvotes: 2

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