implement TODOs exept bonus tasks

README.md

@@ -1,202 +0,0 @@
-# Eighth Assignment: Multithreading Basics
-
-## Table of contents
-- [Introduction](#introduction)
-- [Objectives 🎯](#objectives-)
-- [Theoretical Questions 📝](#theoretical-questions-)
-- [Practical Questions 💻](#practical-questions-)
-- [Evaluation ⚖️](#evaluation-)
-- [Submission ⌛](#submission-)
-- [Additional Resources 📚](#additional-resources-)
-
-## Important Note:
-This project is configured as a **Maven project**. If you're opening this project in an IDE (like IntelliJ IDEA or VS Code), please ensure you import it as a Maven project so that dependencies and build settings are recognized automatically.
-
-To run the project from the command line, use:
-```bash
-mvn compile
-mvn exec:java -Dexec.mainClass="Main"
-```
-
-## Introduction
-Welcome to your Eighth Advanced Programming (AP) Assignment. This project is divided into two main sections:
-
-1. **Theoretical Questions**: Analyze key multithreading concepts (Start vs Run, Daemon threads, and Lambdas).
-2. **Practical Questions**: Implement a **Simulated Download Manager**. You will use Java Threads to simulate downloading a file in multiple chunks concurrently.
-
-> **⚠️ Note:** This is a **local simulation only**. There is no actual network activity, URL connection, or socket programming involved. The goal is to practice thread management and state observation.
-
-## Objectives 🎯
-
-By completing this assignment, you will:
-- Apply **multithreading** basics using the `Thread` class and `Runnable` interface.
-- Understand how to manage multiple worker threads performing independent tasks.
-- Implement a monitor thread to observe the progress of other threads.
-- Practice using `start()` and `join()` for thread lifecycle management.
-
-## Theoretical Questions 📝
-**Note: Please answer these questions in a Markdown file (Report.md) and place it in the root directory of your fork. Include code or screenshots where you see fit.**
-
-### 1. `start()` vs `run()`
-
-```java  
-public class StartVsRun {    
-    static class MyRunnable implements Runnable {    
-        public void run() {    
-            System.out.println("Running in: " + Thread.currentThread().getName()); 
-        }    
-    }    
-    public static void main(String[] args) throws InterruptedException {    
-        Thread t1 = new Thread(new MyRunnable(), "Thread-1");    
-        System.out.println("Calling run()");    
-        t1.run();    
-        Thread.sleep(100);    
-    
-        Thread t2 = new Thread(new MyRunnable(), "Thread-2");    
-        System.out.println("Calling start()");    
-        t2.start();    
-    }  
-}  
-```  
-
-**Questions:**
-
-- What output do you get from the program? Why?
-
-- What’s the difference in behavior between calling `start()` and `run()`?
-
----  
-
-### 2. Daemon Threads
-
-```java  
-public class DaemonExample {    
-    static class DaemonRunnable implements Runnable {    
-        public void run() {    
-            for(int i = 0; i < 20; i++) {    
-                System.out.println("Daemon thread running...");    
-                try {    
-                    Thread.sleep(500);    
-                } catch (InterruptedException e) {    
-                 //[Handling Exception...]  
-                }            
-            }    
-        }    
-    }    
-    public static void main(String[] args) {    
-        Thread thread = new Thread(new DaemonRunnable());    
-        thread.setDaemon(true);    
-        thread.start();    
-        System.out.println("Main thread ends.");    
-    }  
-}  
-```  
-
-**Questions:**
-- What output do you get from the program? Why?
-
-- What happens if you remove `thread.setDaemon(true)`?
-
-- What are some real-life use cases of daemon threads?
-
-  
----  
-
-### 3. A shorter way to create threads
-
-```java  
-public class ThreadDemo {  
-    public static void main(String[] args) {  
-        Thread thread = new Thread(() -> {  
-            System.out.println("Thread is running using a ...!");  
-        });  
-  
-        thread.start();  
-    }  
-}   
-```  
-
-**Questions:**
-- What output do you get from the program?
-
-- What is the `() -> { ... }` syntax called?
-
-- How is this code different from creating a class that extends `Thread` or implements `Runnable`?
-
-
-## Practical Questions 💻
-
-### Simulated Download Manager
-You are tasked with completing a skeleton project for a download manager. The application reads a configuration file, splits a "file" into several chunks, and assigns each chunk to a dedicated worker thread.
-
-#### 🏗 Project Structure
-- `src/main/resources/download_config.txt`: Contains simulation parameters (file size, chunk count, delays).
-- `DownloadWorker.java`: The logic for simulating a chunk download (needs implementation).
-- `ProgressMonitor.java`: A thread that periodically prints the total progress (needs implementation).
-- `Main.java`: The entry point that initializes chunks, starts threads, and waits for completion.
-- `ChunkStatus.java`: Data class holding the state of individual chunks.
-
-#### 🛠 What You Need to Do
-In the provided source code, look for **`// TODO`** comments. You must:
-
-1.  **Implement `DownloadWorker`**:
-    - Record start/end times for each chunk.
-    - Use a loop to simulate progress based on the random delays and step sizes provided in the config.
-    - Update the shared `ChunkStatus` object so the monitor can see progress.
-2.  **Implement `ProgressMonitor`**:
-    - Periodically calculate the total downloaded megabytes across all chunks.
-    - Exit gracefully once all chunks are marked as completed.
-3.  **Complete `Main`**:
-    - Properly instantiate and `start()` the worker threads and the monitor thread.
-    - Use `join()` to ensure the main thread waits for all workers to finish before printing the final report.
-
-#### ⚙️ Configuration
-The simulation behavior is controlled by `src/main/resources/download_config.txt`. You can modify these values to test different scenarios (e.g., more chunks or faster/slower speeds).
-
----
-
-## Bonus Tasks 🌟
-- Download Speed and ETA:
-    - Calculate and display the current overall download speed during the simulation.
-    - Estimate and show the remaining time (ETA) based on the current progress and speed.
-
-- User Interface (UI):
-    - Improve the console output or design a simple UI that presents download progress in a cleaner and more intuitive way.
-    - Make the simulation easier to follow by showing chunk activity, total progress, and final results in a user-friendly format.
-
-- Real-Time Progress Bar:
-    - Implement a real-time progress bar that updates in place instead of printing a new line each time.
-    - Show smooth progress growth in the console so the output looks more like a real download manager.
-
-- Sequential vs Multithreaded Comparison:
-    - Add a mode to simulate downloading chunks sequentially (one after another) and compare it with the multithreaded version.
-    - Measure and report the total execution time of both approaches, and briefly analyze the difference in performance.
-
-## Evaluation ⚖️
-
-Your work will be evaluated based on:
-
-- **Thread Management**: Correct use of `start()` and `join()`.
-- **Simulation Logic**: Correct implementation of the loops and random delays in the worker threads.
-- **Thread Safety**: Following the constraint of each worker only writing to its own assigned object.
-- **Code Quality**: Readable code and proper use of Java conventions.
-
-**Total: 500 points**
-- 🧠 Theoretical Questions – 150 points
-- 💻 Practical Task (Download Manager) – 350 points
-
-## Submission ⌛
-
-1. Add your mentor as a contributor to the project.
-2. Create a `develop` branch for implementing features.
-3. Use Git for regular code commits.
-4. Push your code and the answers file (Report.md) to the remote repository.
-5. Submit a pull request to merge the `develop` branch with `main`.
-
-**Deadline:** **Friday, June 5** (15th of Khordad)
-
-## Additional Resources 📚
-
-- [Java Concurrency and Multithreading](https://jenkov.com/tutorials/java-concurrency/index.html)
-- [Creating and Starting Java Threads](https://jenkov.com/tutorials/java-concurrency/creating-and-starting-threads.html)
-- [Thread.join() explained](https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html#join--)

Report.md

@@ -0,0 +1,39 @@
+# Answers of theoretical questions
+
+## 1:
+
+**outputs:**
+
+    Calling run()
+    Running in: main
+    Calling start()
+    Running in: Thread-2
+
+this is because of the difference between run() and start() method.
+when you call run method, it only calls the run function of StartVsRun class and it runs on the main thread;
+but when you call **start** method it runs on new thread(here we name it Thread-2)
+---
+## 2:
+
+**outputs:**
+
+    Main thread ends.
+    Daemon thread running...
+
+if we set daemon true The **JVM** terminates the thread right after the main thread ends. 
+if we don't set the thread as a daemon, after the main thread ended it will continue it's work until it will be done(print Daemon thread running 20 times).
+
+
+### Real-Life use case of daemon threads:
+
+- Memory and Resource Management(like java's garbage collector)
+- Infrastructure & Telemetry Monitoring(like send a ping to a central server every 5 seconds)
+- Spell Checkers
+
+## 3:
+
+**output:**
+
+    Thread is running using a ...!
+
+it calls **Lambda Expression** and it is shorter and faster way than making a class which extend thread or implement runnable to have another thread for our works.

src/main/java/DownloadWorker.java

@@ -23,21 +23,37 @@ public class DownloadWorker implements Runnable {
     public void run() {
         // TODO: Record the chunk start time in chunkStatus.
         double downloaded = 0.0;
-
+        chunkStatus.setStartTimeMs(System.currentTimeMillis());
         // TODO: Print a message that this chunk has started downloading.
+        System.out.println("Chunk " + chunkStatus.getChunkId() + " has started downloading.");
 
         while (downloaded < chunkStatus.getChunkSizeMB()) {
             // TODO: Generate a random sleep delay between min and max delay.
             // TODO: Sleep for that delay.
+            try {
+                Thread.sleep(random.nextInt(config.getMinStepDelayMs(), config.getMaxStepDelayMs()));
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
             // TODO: Generate a random download amount for this step.
             // TODO: Increase downloaded, but do not go beyond chunk size.
+            downloaded += random.nextDouble(config.getMinStepDownloadMB(), config.getMaxStepDownloadMB());
+            if(downloaded > chunkStatus.getChunkSizeMB())
+            {
+                downloaded = chunkStatus.getChunkSizeMB();
+            }
             // TODO: Save the updated downloaded value into chunkStatus.
+            chunkStatus.setDownloadedMB(downloaded);
             // TODO: Optionally print step-by-step progress.
+            System.out.println(chunkStatus);
         }
-
         // 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 " + chunkStatus.getChunkId() + " has finished downloading.");
     }
 
 }

src/main/java/Main.java

@@ -37,6 +37,7 @@ public class Main {
             // TODO:
             // Students may print helpful debug information here,
             // for example which chunk is assigned to which worker thread.
+            System.out.println("Chunk " + chunk.getChunkId() + " assigned to " + workerThread.getName());
         }
 
         // 4. Create and start monitor thread
@@ -48,12 +49,16 @@ public class Main {
         // so that progress can be displayed while downloading happens.
         //
         // Example idea:
-        // monitorThread.start();
+         monitorThread.start();
 
         // 5. Start worker threads
         // TODO:
         // Start each worker thread in workerThreads.
         // Use a loop and call start() on each thread.
+        for(Thread worker: workerThreads)
+        {
+            worker.start();
+        }
 
         // 6. Wait for workers to finish
         // TODO:
@@ -61,9 +66,13 @@ public class Main {
         // This should be done inside a try-catch block for InterruptedException.
         //
         // Hint:
-        // for (Thread thread : workerThreads) {
+        try {
-        //     thread.join();
+            for (Thread thread : workerThreads) {
-        // }
+                thread.join();
+            }
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
 
         // TODO:
         // After all workers finish, the monitor thread may also need to stop.
@@ -72,7 +81,11 @@ public class Main {
         // - add a stopping mechanism in ProgressMonitor later.
         //
         // If your monitor finishes automatically, you may join it here.
-
+        try {
+            monitorThread.join();
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
         // NOTE:
         // this final report may show 0 progress because no worker has actually run yet.
         // Until students complete the thread start/join TODOs above,

src/main/java/ProgressMonitor.java

@@ -57,6 +57,12 @@ public class ProgressMonitor implements Runnable {
 
             // TODO:
             // If all chunks are completed, print a final message and exit the loop
+            if(completedChunks == chunks.size())
+            {
+                System.out.println("file has finished downloading");
+                break;
+            }
+
 
             try {
                 Thread.sleep(monitorDelayMs);