diff --git a/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/SnackscriptionSubscriptionboxApplication.java b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/SnackscriptionSubscriptionboxApplication.java
index 0e6c4d6..4ecf056 100644
--- a/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/SnackscriptionSubscriptionboxApplication.java
+++ b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/SnackscriptionSubscriptionboxApplication.java
@@ -2,6 +2,13 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+
+import java.util.concurrent.Executor;
+
+@EnableAsync
 
 @SpringBootApplication
 public class SnackscriptionSubscriptionboxApplication {
@@ -10,4 +17,15 @@ public static void main(String[] args) {
         SpringApplication.run(SnackscriptionSubscriptionboxApplication.class, args);
     }
 
+    @Bean
+    public Executor taskExecutor () {
+        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+        executor.setCorePoolSize(1);
+        executor.setMaxPoolSize(1);
+        executor.setQueueCapacity(500);
+        executor.setThreadNamePrefix("GithubLookup-");
+        executor.initialize();
+        return executor;
+    }
+
 }
diff --git a/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/controller/ItemController.java b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/controller/ItemController.java
new file mode 100644
index 0000000..46c1d8b
--- /dev/null
+++ b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/controller/ItemController.java
@@ -0,0 +1,69 @@
+package id.ac.ui.cs.advprog.snackscription_subscriptionbox.controller;
+
+
+import id.ac.ui.cs.advprog.snackscription_subscriptionbox.model.Item;
+import lombok.Getter;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Getter
+@RestController
+@RequestMapping("/items")
+public class ItemController {
+
+    private final List<Item> items = new ArrayList<>();
+
+    @GetMapping
+    public ResponseEntity<List<Item>> getAllItems() {
+        return new ResponseEntity<>(items, HttpStatus.OK);
+    }
+
+    @GetMapping("/{id}")
+    public ResponseEntity<Item> getItemById(@PathVariable String id) {
+        for (Item item : items) {
+            if (item.getId().equals(id)) {
+                return new ResponseEntity<>(item, HttpStatus.OK);
+            }
+        }
+        return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+    }
+
+    @PostMapping
+    public ResponseEntity<Item> createItem(@RequestBody Item item) {
+        items.add(item);
+        return new ResponseEntity<>(item, HttpStatus.CREATED);
+    }
+
+    @PutMapping("/{id}")
+    public ResponseEntity<Item> updateItem(@PathVariable String id, @RequestBody Item updatedItem) {
+        for (Item item : items) {
+            if (item.getId().equals(id)) {
+                item.setName(updatedItem.getName());
+                item.setQuantity(updatedItem.getQuantity());
+                return new ResponseEntity<>(item, HttpStatus.OK);
+            }
+        }
+        return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+    }
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Void> deleteItem(@PathVariable String id) {
+        for (Item item : items) {
+            if (item.getId().equals(id)) {
+                items.remove(item);
+                return new ResponseEntity<>(HttpStatus.NO_CONTENT);
+            }
+        }
+        return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+    }
+
+    public void setItems(List<Item> items) {
+        this.items.clear();
+        this.items.addAll(items);
+    }
+
+}
\ No newline at end of file
diff --git a/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/factory/Factory.java b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/factory/Factory.java
index 42ddf56..2cf91df 100644
--- a/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/factory/Factory.java
+++ b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/factory/Factory.java
@@ -6,6 +6,6 @@
 
 public interface Factory <T> {
     T create();
-
-    T create(String id, String name, String type, int price, List<Item> items , String description);
+    T create(String id, String name, int quantity);
+    T create(String id, String name, String type, int price, List<Item> items );
 }
\ No newline at end of file
diff --git a/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/factory/ItemFactory.java b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/factory/ItemFactory.java
new file mode 100644
index 0000000..bea016e
--- /dev/null
+++ b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/factory/ItemFactory.java
@@ -0,0 +1,23 @@
+package id.ac.ui.cs.advprog.snackscription_subscriptionbox.factory;
+import id.ac.ui.cs.advprog.snackscription_subscriptionbox.model.Item;
+
+import java.util.List;
+
+public class ItemFactory implements Factory<Item> {
+    @Override
+    public Item create(){
+        return new Item();
+    }
+
+    public Item create(String id, String name, int quantity){
+        return  new Item(id, name, quantity);
+    }
+
+    @Override
+    public Item create(String id, String name, String type, int price, List<Item> items) {
+        return null;
+    }
+}
+
+
+
diff --git a/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/model/Item.java b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/model/Item.java
index b83498d..bf105eb 100644
--- a/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/model/Item.java
+++ b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/model/Item.java
@@ -1,6 +1,5 @@
 package id.ac.ui.cs.advprog.snackscription_subscriptionbox.model;
 
-import com.fasterxml.jackson.annotation.JsonBackReference;
 import jakarta.persistence.*;
 import lombok.Getter;
 import lombok.Setter;
@@ -20,15 +19,13 @@ public class Item {
     private int quantity;
 
     @ManyToMany(mappedBy = "items")
-    @JsonBackReference
     private List<SubscriptionBox> subscriptionBoxes;
 
+    public Item() {}
+
     public Item(String id, String name, int quantity) {
         this.id = id;
         this.name = name;
         this.quantity = quantity;
     }
-
-    public Item() {
-    }
 }
\ No newline at end of file
diff --git a/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/repository/ItemRepository.java b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/repository/ItemRepository.java
index 1ee048c..184aae5 100644
--- a/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/repository/ItemRepository.java
+++ b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/repository/ItemRepository.java
@@ -36,6 +36,11 @@ public Item editItem(Item item) {
         }
         return null;
     }
+
+    public List<Item> getAllItems() {
+        return new ArrayList<>(items);
+    }
+
 }
 
 
diff --git a/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/service/ItemService.java b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/service/ItemService.java
new file mode 100644
index 0000000..ed8eda3
--- /dev/null
+++ b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/service/ItemService.java
@@ -0,0 +1,13 @@
+package id.ac.ui.cs.advprog.snackscription_subscriptionbox.service;
+
+import id.ac.ui.cs.advprog.snackscription_subscriptionbox.model.Item;
+import java.util.List;
+
+public interface ItemService {
+    Item createItem(String id, String name, int quantity);
+    Item getItemById(String id);
+    Item deleteItem(String id);
+    Item editItem(String id, String name, int quantity);
+    List<Item> getAllItems();
+
+}
diff --git a/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/service/ItemServiceImpl.java b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/service/ItemServiceImpl.java
new file mode 100644
index 0000000..f0dc520
--- /dev/null
+++ b/src/main/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/service/ItemServiceImpl.java
@@ -0,0 +1,56 @@
+package id.ac.ui.cs.advprog.snackscription_subscriptionbox.service;
+
+import id.ac.ui.cs.advprog.snackscription_subscriptionbox.model.Item;
+import id.ac.ui.cs.advprog.snackscription_subscriptionbox.repository.ItemRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class ItemServiceImpl implements ItemService {
+
+    private final ItemRepository itemRepository;
+
+    @Autowired
+    public ItemServiceImpl(ItemRepository itemRepository) {
+        this.itemRepository = itemRepository;
+    }
+
+    @Override
+    public Item createItem(String id, String name, int quantity) {
+        Item item = new Item(id, name, quantity);
+        return itemRepository.createItem(item);
+    }
+
+    @Override
+    public Item getItemById(String id) {
+        return itemRepository.getItemById(id);
+    }
+
+    @Override
+    public Item deleteItem(String id) {
+        Item item = itemRepository.getItemById(id);
+        if (item != null) {
+            return itemRepository.deleteItem(item);
+        }
+        return null;
+    }
+
+    @Override
+    public Item editItem(String id, String name, int quantity) {
+        Item existingItem = itemRepository.getItemById(id);
+        if (existingItem != null) {
+            existingItem.setName(name);
+            existingItem.setQuantity(quantity);
+            return itemRepository.editItem(existingItem);
+        }
+        return null;
+    }
+
+    @Override
+    public List<Item> getAllItems() {
+        return itemRepository.getAllItems();
+    }
+}
+
diff --git a/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/controller/ItemControllerTest.java b/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/controller/ItemControllerTest.java
new file mode 100644
index 0000000..76f69af
--- /dev/null
+++ b/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/controller/ItemControllerTest.java
@@ -0,0 +1,86 @@
+package id.ac.ui.cs.advprog.snackscription_subscriptionbox.controller;
+
+
+import id.ac.ui.cs.advprog.snackscription_subscriptionbox.model.Item;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class ItemControllerTest {
+
+    private ItemController itemController;
+    private List<Item> items;
+
+    @BeforeEach
+    public void setUp() {
+        itemController = new ItemController();
+        items = new ArrayList<>();
+        items.add(new Item("1", "Snack A", 5));
+        items.add(new Item("2", "Snack B", 10));
+        itemController.setItems(items);
+    }
+
+    @Test
+    public void testGetAllItems() {
+        ResponseEntity<List<Item>> responseEntity = itemController.getAllItems();
+        assertEquals(HttpStatus.OK, responseEntity.getStatusCode());
+        assertEquals(items, responseEntity.getBody());
+    }
+
+    @Test
+    public void testGetItemById() {
+        ResponseEntity<Item> responseEntity = itemController.getItemById("1");
+        assertEquals(HttpStatus.OK, responseEntity.getStatusCode());
+        assertEquals("Snack A", Objects.requireNonNull(responseEntity.getBody()).getName());
+    }
+
+    @Test
+    public void testGetItemById_NotFound() {
+        ResponseEntity<Item> responseEntity = itemController.getItemById("100");
+        assertEquals(HttpStatus.NOT_FOUND, responseEntity.getStatusCode());
+    }
+
+    @Test
+    public void testCreateItem() {
+        Item newItem = new Item("3", "Snack C", 8);
+        ResponseEntity<Item> responseEntity = itemController.createItem(newItem);
+        assertEquals(HttpStatus.CREATED, responseEntity.getStatusCode());
+        assertEquals(newItem, responseEntity.getBody());
+    }
+
+    @Test
+    public void testUpdateItem() {
+        Item updatedItem = new Item("1", "New Snack A", 7);
+        ResponseEntity<Item> responseEntity = itemController.updateItem("1", updatedItem);
+        assertEquals(HttpStatus.OK, responseEntity.getStatusCode());
+        assertEquals(updatedItem, responseEntity.getBody());
+    }
+
+    @Test
+    public void testUpdateItem_NotFound() {
+        Item updatedItem = new Item("100", "New Snack A", 7);
+        ResponseEntity<Item> responseEntity = itemController.updateItem("100", updatedItem);
+        assertEquals(HttpStatus.NOT_FOUND, responseEntity.getStatusCode());
+    }
+
+    @Test
+    public void testDeleteItem() {
+        ResponseEntity<Void> responseEntity = itemController.deleteItem("1");
+        assertEquals(HttpStatus.NO_CONTENT, responseEntity.getStatusCode());
+        assertEquals(1, itemController.getItems().size());
+    }
+
+    @Test
+    public void testDeleteItem_NotFound() {
+        ResponseEntity<Void> responseEntity = itemController.deleteItem("100");
+        assertEquals(HttpStatus.NOT_FOUND, responseEntity.getStatusCode());
+    }
+
+}
diff --git a/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/factory/ItemFactoryTest.java b/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/factory/ItemFactoryTest.java
new file mode 100644
index 0000000..515a99f
--- /dev/null
+++ b/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/factory/ItemFactoryTest.java
@@ -0,0 +1,45 @@
+package id.ac.ui.cs.advprog.snackscription_subscriptionbox.factory;
+
+import id.ac.ui.cs.advprog.snackscription_subscriptionbox.model.Item;
+import org.junit.jupiter.api.Test;
+import java.util.UUID;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class ItemFactoryTest {
+
+    @Test
+    public void testCreateDefaultItem() {
+        ItemFactory itemFactory = new ItemFactory();
+        Item item = itemFactory.create();
+
+        assertTrue(isValidUUID(item.getId()));
+        assertNull(item.getName());
+        assertEquals(0, item.getQuantity());
+    }
+
+    @Test
+    public void testCreateItemWithParameters() {
+        ItemFactory itemFactory = new ItemFactory();
+        String id = UUID.randomUUID().toString();
+        String name = "Snack A";
+        int quantity = 5;
+
+        Item item = itemFactory.create(id, name, quantity);
+
+        // Memeriksa apakah nilai parameter sesuai dengan nilai yang diatur di item
+        assertEquals(id, item.getId());
+        assertEquals(name, item.getName());
+        assertEquals(quantity, item.getQuantity());
+    }
+
+    private boolean isValidUUID(String uuidString) {
+        try {
+            UUID.fromString(uuidString);
+            return true;
+        } catch (IllegalArgumentException e) {
+            return false;
+        }
+    }
+}
+
diff --git a/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/model/ItemTest.java b/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/model/ItemTest.java
new file mode 100644
index 0000000..4343909
--- /dev/null
+++ b/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/model/ItemTest.java
@@ -0,0 +1,40 @@
+package id.ac.ui.cs.advprog.snackscription_subscriptionbox.model;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+public class ItemTest {
+
+    @Test
+    public void testDefaultConstructor() {
+        Item item = new Item();
+        assertNull(item.getId());
+        assertNull(item.getName());
+        assertEquals(0, item.getQuantity());
+    }
+
+    @Test
+    public void testParameterizedConstructor() {
+        String id = "123";
+        String name = "Snack A";
+        int quantity = 5;
+
+        Item item = new Item(id, name, quantity);
+        assertEquals(id, item.getId());
+        assertEquals(name, item.getName());
+        assertEquals(quantity, item.getQuantity());
+    }
+
+    @Test
+    public void testSettersAndGetters() {
+        Item item = new Item();
+        item.setId("456");
+        item.setName("Snack B");
+        item.setQuantity(10);
+
+        assertEquals("456", item.getId());
+        assertEquals("Snack B", item.getName());
+        assertEquals(10, item.getQuantity());
+    }
+}
diff --git a/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/repository/ItemRepositoryTest.java b/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/repository/ItemRepositoryTest.java
new file mode 100644
index 0000000..b65e3a7
--- /dev/null
+++ b/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/repository/ItemRepositoryTest.java
@@ -0,0 +1,56 @@
+package id.ac.ui.cs.advprog.snackscription_subscriptionbox.repository;
+
+import id.ac.ui.cs.advprog.snackscription_subscriptionbox.model.Item;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+public class ItemRepositoryTest {
+
+    private ItemRepository itemRepository;
+
+    @BeforeEach
+    public void setUp() {
+        itemRepository = new ItemRepository();
+    }
+
+    @Test
+    public void testCreateItem() {
+        Item item = new Item("1", "Snack A", 5);
+        Item createdItem = itemRepository.createItem(item);
+        assertEquals(item, createdItem);
+    }
+
+    @Test
+    public void testGetItemById() {
+        Item item = new Item("1", "Snack A", 5);
+        itemRepository.createItem(item);
+        Item retrievedItem = itemRepository.getItemById("1");
+        assertEquals(item, retrievedItem);
+    }
+
+    @Test
+    public void testDeleteItem() {
+        Item item = new Item("1", "Snack A", 5);
+        itemRepository.createItem(item);
+        Item deletedItem = itemRepository.deleteItem(item);
+        assertEquals(item, deletedItem);
+        assertNull(itemRepository.getItemById("1"));
+    }
+
+    @Test
+    public void testEditItem() {
+        Item item = new Item("1", "Snack A", 5);
+        itemRepository.createItem(item);
+
+        Item updatedItem = new Item("1", "Snack B", 10);
+        Item editedItem = itemRepository.editItem(updatedItem);
+        assertEquals(updatedItem, editedItem);
+
+        Item retrievedItem = itemRepository.getItemById("1");
+        assertEquals("Snack B", retrievedItem.getName());
+        assertEquals(10, retrievedItem.getQuantity());
+    }
+}
+
diff --git a/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/service/ItemServiceImplTest.java b/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/service/ItemServiceImplTest.java
new file mode 100644
index 0000000..cda7497
--- /dev/null
+++ b/src/test/java/id/ac/ui/cs/advprog/snackscription_subscriptionbox/service/ItemServiceImplTest.java
@@ -0,0 +1,88 @@
+package id.ac.ui.cs.advprog.snackscription_subscriptionbox.service;
+
+
+import id.ac.ui.cs.advprog.snackscription_subscriptionbox.model.Item;
+import id.ac.ui.cs.advprog.snackscription_subscriptionbox.repository.ItemRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class ItemServiceImplTest {
+
+    private ItemServiceImpl itemService;
+
+    @BeforeEach
+    void setUp() {
+        ItemRepository itemRepository = new ItemRepository();
+        itemService = new ItemServiceImpl(itemRepository);
+    }
+
+    @Test
+    void testCreateItem() {
+        Item createdItem = itemService.createItem("1", "Item 1", 10);
+
+        assertNotNull(createdItem);
+        assertEquals("1", createdItem.getId());
+        assertEquals("Item 1", createdItem.getName());
+        assertEquals(10, createdItem.getQuantity());
+    }
+
+    @Test
+    void testGetItemById() {
+        itemService.createItem("1", "Item 1", 10);
+        Item fetchedItem = itemService.getItemById("1");
+
+        assertNotNull(fetchedItem);
+        assertEquals("1", fetchedItem.getId());
+        assertEquals("Item 1", fetchedItem.getName());
+        assertEquals(10, fetchedItem.getQuantity());
+    }
+
+    @Test
+    void testDeleteItem() {
+        itemService.createItem("1", "Item 1", 10);
+        Item deletedItem = itemService.deleteItem("1");
+
+        assertNotNull(deletedItem);
+        assertEquals("1", deletedItem.getId());
+        assertEquals("Item 1", deletedItem.getName());
+        assertEquals(10, deletedItem.getQuantity());
+
+        assertNull(itemService.getItemById("1"));
+    }
+
+    @Test
+    void testEditItem() {
+        itemService.createItem("1", "Item 1", 10);
+        Item editedItem = itemService.editItem("1", "Item 1 Edited", 20);
+
+        assertNotNull(editedItem);
+        assertEquals("1", editedItem.getId());
+        assertEquals("Item 1 Edited", editedItem.getName());
+        assertEquals(20, editedItem.getQuantity());
+    }
+
+    @Test
+    void testGetAllItems() {
+        itemService.createItem("1", "Item 1", 10);
+        itemService.createItem("2", "Item 2", 20);
+
+        List<Item> allItems = itemService.getAllItems();
+
+        assertNotNull(allItems);
+        assertEquals(2, allItems.size());
+
+        Item firstItem = allItems.getFirst();
+        assertEquals("1", firstItem.getId());
+        assertEquals("Item 1", firstItem.getName());
+        assertEquals(10, firstItem.getQuantity());
+
+        Item secondItem = allItems.get(1);
+        assertEquals("2", secondItem.getId());
+        assertEquals("Item 2", secondItem.getName());
+        assertEquals(20, secondItem.getQuantity());
+    }
+}