sari-saif/oop.assignment2

OOP.Assignment2

PART A

Brief

we created numbers of files and compute number lines for each file , by using 3 methods:

1. normal method without using thread
2. used threads
3. used ThreadPool

The following tables show 3 scenarios in each scenario are measured 3 methods on fixed amounts of files In ascending order of lines per file

Scenario 1: Up to 10 lines in a single file

Ex2_1.createTextFiles(10000, 1, 10);

	10000 Files	1000 Files	100 Files	10 Files
getNumOfLines()	9 sec 478 ms	167 ms	152 ms	86 ms
getNumOfLinesThreads()	1 sec 733 ms	228 ms	61 ms	47 ms
getNumOfLinesThreadPool()	2 sec 90 ms	228 ms	55 ms	47 ms
total lines	45309	4738	476	57

Scenario 2: Up to 100 lines in a single file

Ex2_1.createTextFiles(10000, 1, 100);

	10000 Files	1000 Files	100 Files	10 Files
getNumOfLines()	13 sec 709 ms	1 sec 601 ms	448 ms	95 ms
getNumOfLinesThreads()	1 sec 632 ms	255 ms	78 ms	48 ms
getNumOfLinesThreadPool()	2 sec 8 ms	210 ms	65 ms	48 ms
total lines	499039	50698	4956	457

Scenario 3: Up to 1000 lines in a single file

Ex2_1.createTextFiles(10000, 1, 1000);

	10000 Files	1000 Files	100 Files	10 Files
getNumOfLines()	55 sec 304 ms	6 sec 800 ms	649 ms	110 ms
getNumOfLinesThreads()	1 sec 835 ms	289 ms	100 ms	42 ms
getNumOfLinesThreadPool()	2 sec 251 ms	286 ms	103 ms	54 ms
total lines	5005739	508498	51056	6657

Conclusions

It can be seen that the more files there are, and the more lines there are in each file,

the more the functions that use threads are significantly faster than the normal function

that does not use threads. Another thing, you can notice that the third function that

uses threadpool, takes a little more time than the second function.

We assume that this is the case because both use more or less the same number of threads,

but we pay the overhead of creating the threadpool and operating it.

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PART B

OBJECTIVE

Here we created two new types that extend the functionality of Java's Concurrency Framework

1. A generic task with a Type that returns a result and may throw an exception. Each task has a priority used for scheduling inferred from the integer value of the tasks Type.
2. A custom thread pool class that defines a method for submitting a generic task as described in the section 1 to a priority queue, and a method for submitting a generic task created by a Callable and a Type, passed as arguments.

• For more details click here

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