Question about reasonability of exceptions list in the Task 1.1.1

[Pavlo Rybakov]

Hi All,

I'm a little bit confused about task 1.1.1

In the DB-interface I found:

 public long lock(int recNo) throws RecordNotFoundException 

Here is everything Ok.
Before lock the record with number recNo, I have to check whether this record exists in the database file.
If record does not exist or deleted - throw RecordNotFoundException.

But what I do not understand:

 public void unlock(int recNo, long cookie) throws RecordNotFoundException, SecurityException 

why do we need RecordNotFoundException for unlock?

for example, if I write something like

  
  long cookie = lock(1);

  update(somedata[], cookie);

  unlock(1, cookie);

- should RecordNotFoundException occur - it will happen in the lock-method.

[Roel De Nijs]

Hi Pavlo,

First of all: please try to use complete words when you are posting questions, because a lot of not-native english speakers are reading and posting to these forums, and abbreviations makes things less clear, so edit your 1st post. And also provide a more meaningful title of your topic.

If the unlock method signature indicates this method could throw a RecordNotFoundException, it doesn't mean you have to throw it. Your reasoning is spot-on, I myself also didn't throw a RecordNotFoundException from the unlock method, nor from update and/or delete methods.

Kind regards,
Roel

[Pavlo Rybakov]

Thank you Roel !

Hopefully I changed all my abbreviations.
It was without malicious intent.

[Roel De Nijs]

No problem although I'm a regular on this forum, I had some difficulties decyphering them (could also be the brain inactivity because it's quiet late )