update slides and add python rpc example

README.md

@@ -5,5 +5,5 @@ This branch contains all materials for the 9th tutorial session.
 ## Agenda
 
 - Assignment's solution presentation
-- Recap & Discussion: P2P, Cloud Computing
+- Recap & Discussion: RMI, P2P, Cloud Computing
 - Q&A

exercises/python-rpc/client.py

+import xmlrpc.client
+
+server = xmlrpc.client.ServerProxy("http://localhost:8000")
+with server as proxy:
+    result = proxy.square(5)
+    print("[RPC] The square of 5 is:", result)
+    result = proxy.cube(5)
+    print("[RPC] The cube of 5 is:", result)

exercises/python-rpc/server.py

+import xmlrpc.server
+
+class MyServer:
+    def square(self, x):
+        return x * x
+
+    def cube(self, x):
+        return x * x * x
+
+server = xmlrpc.server.SimpleXMLRPCServer(("localhost", 8000))
+print("Listening on port 8000...")
+server.register_instance(MyServer())
+server.serve_forever()

slides/pages/recap.md

@@ -9,6 +9,40 @@ A possible approach:
 - Use different threads to handle different clients as well as different tasks
 - Use different ports to handle different services
 
+See live demo.
+
+---
+title: RPC
+---
+
+## Remote Procedure Call (RPC)
+
+**Remote Procedure Call (RPC)** is a distributed computing technique in which a computer program calls a procedure (subroutine or service) to execute in a different address space than its own.
+
+<div class="container flex justify-center mt-5">
+    <img src="/images/RPC.webp" class="block w-md"/>
+</div>
+
+**Language Specific**:
+
+- Java Remote Method Invocation (RMI)
+- Go RPC
+- ...
+
+---
+title: RMI
+---
+
+## Java Remote Method Invocation (RMI)
+
+It is a mechanism that allows an object residing in one system (JVM) to access/invoke an object running on another JVM.
+
+<div class="container flex justify-center mt-5">
+    <img src="/images/RMI.webp" class="block w-md"/>
+</div>
+
+**Note:** RMI is a Java-specific implementation of RPC.
+
 ---
 title: P2P
 ---
@@ -29,7 +63,6 @@ title: Cloud Computing
 ---
 
 # Cloud Computing
-
 Discuss the following topics and explain those concepts in your own words to your teammates:
 <br/>
 
@@ -38,6 +71,3 @@ Discuss the following topics and explain those concepts in your own words to you
 - What are the **deployment models** of cloud computing?
 - What are the key technologies involved in cloud computing?
 
-<!-- <div class="container flex justify-center"> -->
-<!--     <img src="/images/http-header.png" class="block w-md"/> -->
-<!-- </div> -->