implement DownloadWorker.java

src/main/java/DownloadWorker.java

@@ -22,22 +22,53 @@ public class DownloadWorker implements Runnable {
     @Override
     public void run() {
         // TODO: Record the chunk start time in chunkStatus.
+        chunkStatus.setStartTimeMs(System.currentTimeMillis());
+
         double downloaded = 0.0;
 
         // TODO: Print a message that this chunk has started downloading.
+        System.out.println("Starting download for Chunk ID: " + chunkStatus.getChunkId());
 
         while (downloaded < chunkStatus.getChunkSizeMB()) {
+
             // TODO: Generate a random sleep delay between min and max delay.
+            long minDelay = config.getMinStepDelayMs();
+            long maxDelay = config.getMaxStepDelayMs();
+            long sleepTime = minDelay + (long) ((maxDelay - minDelay) * random.nextDouble());
+
             // TODO: Sleep for that delay.
+            try {
+                Thread.sleep(sleepTime);
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+
             // TODO: Generate a random download amount for this step.
+            double minStep = config.getMinStepDownloadMB();
+            double maxStep = config.getMaxStepDownloadMB();
+            double downloadAmount = minStep + ((maxStep - minStep) * random.nextDouble());
+
             // TODO: Increase downloaded, but do not go beyond chunk size.
+            if(downloaded + downloadAmount >= chunkStatus.getChunkSizeMB())
+                downloaded = chunkStatus.getChunkSizeMB();
+            else
+                downloaded += downloadAmount;
+
             // TODO: Save the updated downloaded value into chunkStatus.
+            chunkStatus.setDownloadedMB(downloaded);
+
             // TODO: Optionally print step-by-step progress.
+            System.out.println("Chunk ID: " + chunkStatus.getChunkId() + " | downloaded: " + downloaded);
         }
 
         // TODO: Mark the chunk as completed.
+        chunkStatus.setCompleted(true);
+
         // TODO: Record the chunk end time in chunkStatus.
+        chunkStatus.setEndTimeMs(System.currentTimeMillis());
+
         // TODO: Print a message that this chunk has finished downloading.
+        System.out.println("Chunk ID: " + chunkStatus.getChunkId() + " | COMPLETED!");
     }
 
 }