Buffer & read method

[Omar Kalaldeh]

Hi All,

In me Design I decide to use buffering, but I have a problem with DB interface, it says in the read method comment

// Reads a record from the file. Returns an array where each
// element is a record value.

Now, in read method must I read the records only from data file, and it�s not acceptable to read it from the buffer, or it is all right if I read them from my buffer.

If it the first case, then I must put another public method called readFromBuffer(), witch make Data class a little bit weird and confusing .

Or should I forget about all about buffer, and stay in safe line.

In suggestion will be helpful .

[Marcus Beale]

If you use a RandomAccessFile Object to read the database file, I believe it does a lot of buffering for you. So I don't think you need to worry about buffering directly.

You must be careful with buffering however when dealing with multiple threads. A lot of people do away with the buffering in the RandomAccessFile by openening in the "rwd" mode. I don't believe you need to do this unless you have more than on RandomAccessFile object (some people do have more than one for some strange reason).

,Marcus

[Omar Kalaldeh]

Hi Marcus,

Thank you for your suggestions.

But throw using buffering I may simplified some implementations issues such as searching, so I still need to know if implementing read method to read from buffer is a valid choice.

Again thank you for your response .