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deleteRecord method in DBAccess interface  RSS feed

 
Jofer Chan
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Hi,everyone:
in my DBAccess interface,the deleteRecord method format follow:
public void deleteRecord(long recNo, long lockCookie)
throws RecordNotFoundException, SecurityException;
I don't know how to get the lockCookie,
what's mean the lockCookie?
 
Philippe Maquet
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Hi Jofer,
I don't know how to get the lockCookie,

lockCookie is the value returned by your lockRecord() method. From within that method, you may generate it by using the Random.nextLong() method.
what's mean the lockCookie?

It just identifies a given lock. Before deleting or updating a record, you need to get a lock on it. The lockCookie mechanism is just a way Sun found out to ensure that you do it.
Best,
Phil.
 
Jofer Chan
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Hi,Philippe , Thanks for your reply.
I know what your mean.
Thank you.
 
It is sorta covered in the JavaRanch Style Guide.
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