Test for IPG

Requiremnt

Generate a file with x number of lines and each line consist of a string that is unique with 100 characters long with limitation of 10M of ram

Solution

• Used Flyweight Pattern for passing strings and not stored in any array or list to save memory
• String generated with the combination of counter and zero padding (eg .....0000001) so every string should be unique
• Used BufferedWriter for writing generated rows to file with buffer size of 100 as each row contains 100 chars

Results

Successly generates file with x no of rows consists of unique 100 characters long string with less than 4m of ram untilize, results recoded with Jprofiler for 10 million rows genration

Strings generated

0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002 ...... 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000009999999 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000

Memory Utilize

Ojbect Details