git'n a system-desgin-primer

B4/Solutions/system_design/realtime_collaborative_editing/collab.py

@@ -0,0 +1,36 @@
+import threading
+
+class Document:
+    def __init__(self, title):
+        self.title = title
+        self.content = ""
+        self.lock = threading.Lock()
+
+    def edit(self, new_content):
+        with self.lock:
+            self.content = new_content
+            print(f"Document '{self.title}' updated: {self.content}")
+
+class User:
+    def __init__(self, user_id, name):
+        self.user_id = user_id
+        self.name = name
+
+    def edit_document(self, document, new_content):
+        print(f"{self.name} is editing the document '{document.title}'...")
+        document.edit(new_content)
+
+# Example Usage
+document = Document("Project Plan")
+user1 = User(1, "Alice")
+user2 = User(2, "Bob")
+
+# Simulating concurrent edits
+thread1 = threading.Thread(target=user1.edit_document, args=(document, "Draft by Alice."))
+thread2 = threading.Thread(target=user2.edit_document, args=(document, "Draft by Bob."))
+
+thread1.start()
+thread2.start()
+
+thread1.join()
+thread2.join()

B4/Solutions/system_design/realtime_collaborative_editing/features.rext

@@ -0,0 +1,7 @@
+1. Document: Represents a document being edited, with content locked for 
+    safe concurrent editing.
+
+2. User: Represents a user editing the document.
+
+3. Each user can edit the document concurrently, with proper locking to prevent 
+    data corruption.