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B&S: must i pass ref to fileHandler to lockHandler?

mohamed sulibi
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hi all;

i don't pass a ref to fileHandler that contain isRecordExist() method to lockHandler that responsible for logical-record locking so before i invocate lock method in the lockHanler class i check if the record found or not and also after that as following:

i test many time with this idea and found that every things is ok and fine
but it is safe way for all delete and update unlock methods. ???

best regards.
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