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Copy pathParallelMain2.java
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57 lines (44 loc) · 1.52 KB
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package parallel;
import util.MyLogger;
import java.util.stream.IntStream;
import static util.MyLogger.*;
public class ParallelMain2 {
public static void main(String[] args) throws InterruptedException {
long startTime = System.currentTimeMillis();
// 1. Fork 작업을 분할한다.
SumTask task1 = new SumTask(1,4);
SumTask task2 = new SumTask(5,8);
Thread thread1 = new Thread(task1, "thread-1");
Thread thread2 = new Thread(task2, "thread-2");
// 2. 분할한 작업을 처리한다.
thread1.start();
thread2.start();
// 3. Join - 처리한 결과를 합친다.
thread1.join();
thread2.join();
log("main 스레드 대기 완료");
int sum = task1.result + task2.result;
long endTime = System.currentTimeMillis();
log("time : " + (endTime - startTime) + "ms, sum : " + sum);
}
static class SumTask implements Runnable {
int startValue;
int endValue;
int result = 0;
public SumTask(int startValue, int endValue) {
this.startValue = startValue;
this.endValue = endValue;
}
@Override
public void run() {
log("작업 시작");
int sum = 0;
for (int i = startValue; i <= endValue; i++) {
int calculated = HeavyJob.headvyTask(i);
sum += calculated;
}
result = sum;
log("작업 완료 result= "+result);
}
}
}