인프런 커뮤니티 질문&답변
작성한 질문수
56강에 대한 질문입니다(BoundedMain).
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[질문 템플릿]
1. 강의 내용과 관련된 질문인가요? (예)
2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예)
3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예)
[질문 내용]
package thread.bounded;
import static util.MyLogger.log;
public class ProducerTask implements Runnable {
private BoundedQueue queue;
private String request;
public ProducerTask(BoundedQueue queue, String request) {
this.queue = queue;
this.request = request;
}
@Override
public void run() {
log("[생산 시도] " + request + " -> " + queue);
log("[생산 완료] " + request + " -> " + queue);
}
}
package thread.bounded;
import static util.MyLogger.log;
public class ConsumerTask implements Runnable {
private BoundedQueue queue;
public ConsumerTask(BoundedQueue queue) {
this.queue = queue;
}
@Override
public void run() {
log("[소비 시도] ? <- " + queue);
String data = queue.take();
log("[소비 완료] " + data + " <- " + queue);
}
}
package thread.bounded;
public interface BoundedQueue {
void put(String data);
String take();
}
package thread.bounded;
import java.util.ArrayList;
import java.util.List;
import static util.MyLogger.log;
import static util.ThreadUtils.sleep;
public class BoundedMain {
public static void main(String[] args) {
// 1. BoundedQueue 선택
BoundedQueue queue = new BoundedQueueV1(2);
// 2. 생산자, 소비자 실행 순서 선택, 반드시 하나만 선택!
producerFirst(queue); // 생산자 먼저 실행
//consumerFirst(queue); // 소비자 먼저 실행
}
private static void producerFirst(BoundedQueue queue) {
log("== [생산자 먼저 실행] 시작, " + queue.getClass().getSimpleName() + " ==");
List<Thread> threads = new ArrayList<>();
startProducer(queue, threads);
printAllState(queue, threads);
startConsumer(queue, threads);
printAllState(queue, threads);
log("== [생산자 먼저 실행] 종료, " + queue.getClass().getSimpleName() + " ==");
}
private static void consumerFirst(BoundedQueue queue) {
log("== [소비자 먼저 실행] 시작, " + queue.getClass().getSimpleName() + " ==");
List<Thread> threads = new ArrayList<>();
startConsumer(queue, threads);
printAllState(queue, threads);
startProducer(queue, threads);
printAllState(queue, threads);
log("== [소비자 먼저 실행] 종료, " + queue.getClass().getSimpleName() + " ==");
}
private static void startProducer(BoundedQueue queue, List<Thread> threads) {
System.out.println();
log("생산자 시작");
for (int i = 1; i <= 3; i++) {
Thread producer = new Thread(new ProducerTask(queue, "data" + i), "producer" + i);
threads.add(producer);
producer.start();
sleep(100);
}
}
private static void startConsumer(BoundedQueue queue, List<Thread> threads) {
System.out.println();
log("소비자 시작");
for (int i = 1; i <= 3; i++) {
Thread consumer = new Thread(new ConsumerTask(queue), "consumer" + i);
threads.add(consumer);
consumer.start();
sleep(100);
}
}
private static void printAllState(BoundedQueue queue, List<Thread> threads) {
System.out.println();
log("현재 상태 출력, 큐 데이터: " + queue);
for (Thread thread : threads) {
log(thread.getName() + ": " + thread.getState());
}
}
}
package thread.bounded;
import java.util.ArrayDeque;
import java.util.Queue;
import static util.MyLogger.log;
public class BoundedQueueV1 implements BoundedQueue {
private final Queue<String> queue = new ArrayDeque<>();
private final int max;
public BoundedQueueV1(int max) {
this.max = max;
}
@Override
public synchronized void put(String data) {
if (queue.size() == max) {
log("[put] 큐가 가득 참, 버림: " + data);
return;
}
queue.offer(data);
}
@Override
public synchronized String take() {
if (queue.isEmpty()) {
return null;
}
return queue.poll();
}
@Override
public String toString() {
return queue.toString();
}
}
C:\Users\lgh80\.jdks\temurin-21.0.4\bin\java.exe --enable-preview "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2024.1.4\lib\idea_rt.jar=52674:C:\Program Files\JetBrains\IntelliJ IDEA 2024.1.4\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\java-adv1\out\production\java-adv1 thread.bounded.BoundedMain
09:38:16.411 [ main] == [생산자 먼저 실행] 시작, BoundedQueueV1 ==
09:38:16.413 [ main] 생산자 시작
09:38:16.424 [producer1] [생산 시도] data1 -> []
09:38:16.425 [producer1] [생산 완료] data1 -> []
09:38:16.531 [producer2] [생산 시도] data2 -> []
09:38:16.532 [producer2] [생산 완료] data2 -> []
09:38:16.642 [producer3] [생산 시도] data3 -> []
09:38:16.642 [producer3] [생산 완료] data3 -> []
09:38:16.752 [ main] 현재 상태 출력, 큐 데이터: []
09:38:16.754 [ main] producer1: TERMINATED
09:38:16.754 [ main] producer2: TERMINATED
09:38:16.754 [ main] producer3: TERMINATED
09:38:16.755 [ main] 소비자 시작
09:38:16.757 [consumer1] [소비 시도] ? <- []
09:38:16.757 [consumer1] [소비 완료] null <- []
09:38:16.864 [consumer2] [소비 시도] ? <- []
09:38:16.865 [consumer2] [소비 완료] null <- []
09:38:16.974 [consumer3] [소비 시도] ? <- []
09:38:16.975 [consumer3] [소비 완료] null <- []
09:38:17.085 [ main] 현재 상태 출력, 큐 데이터: []
09:38:17.085 [ main] producer1: TERMINATED
09:38:17.086 [ main] producer2: TERMINATED
09:38:17.086 [ main] producer3: TERMINATED
09:38:17.086 [ main] consumer1: TERMINATED
09:38:17.087 [ main] consumer2: TERMINATED
09:38:17.087 [ main] consumer3: TERMINATED
09:38:17.087 [ main] == [생산자 먼저 실행] 종료, BoundedQueueV1 ==
Process finished with exit code 0
이런 식으로 출력이 뜨는데 강의 내용에 나와있는 로그 창이랑 많이 달라서 강의 코드랑도 비교해봤는데 어디에서 문제가 있는 건지 잘 모르겠습니다.
