Merge pull request mouredev#6210 from martinbohorquez/java#15

#15 - Java

Author: kontroldev

Roadmap/15 - ASINCRONÍA/java/martinbohorquez.java

@@ -0,0 +1,66 @@
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.concurrent.CountDownLatch;
+
+import static java.util.concurrent.TimeUnit.SECONDS;
+
+/**
+ * #15 ASINCRONÍA
+ *
+ * @author martinbohorquez
+ */
+public class martinbohorquez {
+
+    private static final DateTimeFormatter f = DateTimeFormatter.ofPattern("dd-MM-yyyy HH:mm:ss");
+
+    public static void main(String[] args) throws InterruptedException {
+        CountDownLatch latch = new CountDownLatch(2);
+        getTask("tarea 1", 3, latch);
+        getTask("tarea 2", 2, latch);
+        latch.await();
+
+        /*
+         * DIFICULTAD EXTRA
+         */
+        latch = new CountDownLatch(3);
+        System.out.println("[======== DIFICULTAD EXTRA =========]");
+        getTask("C", 3, latch);
+        getTask("B", 2, latch);
+        getTask("A", 1, latch);
+        latch.await();
+        getTask("D", 1, latch);
+
+    }
+
+    private static void getTask(String tarea, int duration, CountDownLatch latch) throws InterruptedException {
+        Task task = new Task(tarea, duration, latch);
+        task.start();
+//        if (join) task.join();
+    }
+
+    public static class Task extends Thread {
+        private final int duration;
+        private final CountDownLatch latch;
+
+        public Task(String name, int duration, CountDownLatch latch) {
+            super(name);
+            this.duration = duration;
+            this.latch = latch;
+        }
+
+        @Override
+        public void run() {
+            System.out.printf("Tarea: %s | Duración: %d segundos | Inicio: %s%n",
+                    getName(), duration, LocalDateTime.now().format(f));
+            try {
+                SECONDS.sleep(duration);
+//                sleep(Duration.ofSeconds(duration));
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+            System.out.printf("Tarea: %s | Fin: %s%n", getName(), LocalDateTime.now().format(f));
+            latch.countDown();
+            System.out.printf("El contador de %s es: %s%n", getName(), latch.getCount());
+        }
+    }
+}