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started task 7

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This commit is contained in:
Tinsae
2025-12-28 03:18:13 +01:00
parent 01bd4ba693
commit ec4234ee13
66 changed files with 2431 additions and 121 deletions
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75
.vscode/launch.json vendored Normal file
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@@ -0,0 +1,75 @@
{
"version": "0.2.0",
"configurations": [
{
"type": "java",
"name": "Run Client (Task 1)",
"request": "launch",
"cwd": "${workspaceFolder}/week3_TinsaeGhilay/Task 1",
"mainClass": "client.Client",
"console": "integratedTerminal"
},
{
"type": "java",
"name": "Run ComputeEngine (Task 1)",
"request": "launch",
"cwd": "${workspaceFolder}/week3_TinsaeGhilay/Task 1",
"mainClass": "engine.ComputeEngine",
"console": "integratedTerminal"
},
{
"type": "java",
"name": "Run Server (Task 2)",
"request": "launch",
"cwd": "${workspaceFolder}/week3_TinsaeGhilay/Task 2",
"mainClass": "server.Server",
"preLaunchTask": "build-task2",
"console": "integratedTerminal"
},
{
"type": "java",
"name": "Run Client (Task 2)",
"request": "launch",
"cwd": "${workspaceFolder}/week3_TinsaeGhilay/Task 2",
"mainClass": "client.Client",
"preLaunchTask": "build-task2",
"console": "integratedTerminal"
},
{
"type": "java",
"name": "Run Server (Task 5)",
"request": "launch",
"cwd": "${workspaceFolder}/week3_TinsaeGhilay/Task 5",
"mainClass": "server.Server",
"preLaunchTask": "build-task5",
"console": "integratedTerminal"
},
{
"type": "java",
"name": "Run Client (Task 5)",
"request": "launch",
"cwd": "${workspaceFolder}/week3_TinsaeGhilay/Task 5",
"mainClass": "client.Client",
"preLaunchTask": "build-task5",
"console": "integratedTerminal"
},
{
"type": "java",
"name": "Run HelloWorldServer (Task 7/example)",
"request": "launch",
"cwd": "${workspaceFolder}/week3_TinsaeGhilay/Task 7/example",
"projectName": "example",
"mainClass": "org.tinsae.grpc.server.HelloWorldServer",
"console": "integratedTerminal"
},
{
"type": "java",
"name": "Run HelloWorldClient (Task 7/example)",
"request": "launch",
"cwd": "${workspaceFolder}/week3_TinsaeGhilay/Task 7/example",
"projectName": "example",
"mainClass": "org.tinsae.grpc.client.HelloWorldClient",
"console": "integratedTerminal"
}
]
}

29
.vscode/tasks.json vendored Normal file
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{
"version": "2.0.0",
"tasks": [
{
"label": "build-task2",
"type": "shell",
"options": {
"cwd": "${workspaceFolder}/week3_TinsaeGhilay/Task 2"
},
"command": "mkdir -p out && javac -cp \"lib/*\" -d out $(find src -name \"*.java\")",
"group": "build",
"problemMatcher": [
"$javac"
]
},
{
"label": "build-task5",
"type": "shell",
"options": {
"cwd": "${workspaceFolder}/week3_TinsaeGhilay/Task 5"
},
"command": "mkdir -p out && javac -d out $(find src -name \"*.java\")",
"group": "build",
"problemMatcher": [
"$javac"
]
}
]
}

15
week3_TinsaeGhilay/Task 2/README.md
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@@ -24,6 +24,21 @@
java -cp "out:lib/*" client.Client
```
### Server commands:
```java
// list of valid commands
private String[] commands = {
"add",
"subtract",
"multiply",
"divide",
"mod",
"power",
"root",
"exit"
};
```
### inspecting packets using wireshark.
***

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week3_TinsaeGhilay/Task 2/out/client/InputHandler.class Normal file
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week3_TinsaeGhilay/Task 2/out/server/Executor.class Normal file
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43
week3_TinsaeGhilay/Task 2/src/client/Client.java
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@@ -39,23 +39,43 @@ public class Client {
XmlRpcClient client = new XmlRpcClient();
client.setConfig(config);
InputHandler handler = new InputHandler();
while (true) {
// create parameters to be sent to server method in a vector
// and populate it
Vector params = new Vector();
int a = validateInput(scanner);
int b = validateInput(scanner);
// get two integers from user
// promptForInt returns null if user wants to exit
Integer a = handler.promptForInt(scanner);
if (a == null) { // user wants to exit
notifyExit();
break;
}
Integer b = handler.promptForInt(scanner);
if (b == null) { // user wants to exit
notifyExit();
break;
}
// get command from user
String command = handler.promptForCommand(scanner);
if (command.equals("exit")) { // user wants to exit
notifyExit();
break;
}
// add parameters to vector
params.addElement(Integer.valueOf(a));
params.addElement(Integer.valueOf(b));
// make the remote method call
// the result of the remot call must be an Object
// and be casted to the appropriate type
Object result = client.execute("sample.add", params);
Object result = client.execute("calculator." + command, params);
// process the result
int sum = ((Integer) result).intValue();
System.out.println("The sum is: " + sum);
System.out.println("The " + handler.mapCommand(command) + " of " + a + " and " + b + " is: " + sum);
}
@@ -64,19 +84,8 @@ public class Client {
}
}
private static int validateInput(Scanner scanner) {
int number;
while (true) {
System.out.print("Enter an integer: ");
if (scanner.hasNextInt()) {
number = scanner.nextInt();
break;
} else {
System.out.println("Invalid input. Please enter a valid integer.");
scanner.next();
}
}
return number;
private static void notifyExit() {
System.out.println("Exit command received. Exiting...");
}
}

127
week3_TinsaeGhilay/Task 2/src/client/InputHandler.java Normal file
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package client;
/**
* InputHandler class
*
* @author Tinsae Ghilay
* for handling user inputs
*/
import java.util.Scanner;
import java.util.Arrays;
public class InputHandler {
// list of valid commands
private String[] commands = {
"add",
"subtract",
"multiply",
"divide",
"mod",
"power",
"root",
"exit"
};
/**
* method to prompt user for a valid integer
*
* @param scanner Scanner object for user input
* @return valid integer input from user
*/
public Integer promptForInt(Scanner scanner) {
Integer number;
while (true) {
System.out.print("Enter an integer: ");
if (scanner.hasNextInt()) {
number = scanner.nextInt();
scanner.nextLine(); // consume the newline
break;
} else {
String command = scanner.nextLine();
// check if user wants to exit and return null
if (command.equalsIgnoreCase("exit")) {
return null;
}
System.out.println("Invalid input. Please enter a valid integer.");
}
}
return number;
}
/**
* method to prompt user for a valid command
*
* @param scanner Scanner object for user input
* @return valid command input from user
*/
public String promptForCommand(Scanner scanner) {
System.out.print("Enter command (add, subtract, multiply, divide, mod, power, root, exit): ");
while (true) {
String command = scanner.nextLine().trim().toLowerCase();
if (isValidCommand(command)) {
return command;
} else {
System.out.print("Invalid command. Please enter a valid command: ");
}
}
}
/**
* helper method to check if command is valid
*
* @param command
* @return
*/
private boolean isValidCommand(String command) {
return Arrays.asList(commands).contains(command.toLowerCase());
}
/**
* getter for commands
*
* @return
*/
public String[] getCommands() {
return commands;
}
/**
* getter for command at index
*
* @param index
* @return
*/
public String getCommand(int index) {
return commands[index];
}
/**
* method to map user command to result term
*
* @param command
* @return
*/
public String mapCommand(String command) {
switch (command.toLowerCase()) {
case "add":
return "sum";
case "subtract":
return "difference";
case "multiply":
return "product";
case "divide":
return "quotient";
case "mod":
return "mod";
case "power":
return "power";
case "root":
return "root";
default:
return null;
}
}
}

91
week3_TinsaeGhilay/Task 2/src/server/Executor.java Normal file
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@@ -0,0 +1,91 @@
package server;
/**
* Executor class for XML-RPC communication
*
* @author Tinsae Ghilay
* based on tutorial from
* https://www.tutorialspoint.com/xml-rpc/xml_rpc_examples.htm
*/
public class Executor {
// define methods that can be called remotely
/**
* sum of two integers
*
* @param x
* @param y
* @return
*/
public Integer add(Integer x, Integer y) {
return Integer.valueOf(x + y);
}
/**
* difference of two integers x - y
*
* @param x
* @param y
* @return
*/
public Integer subtract(Integer x, Integer y) {
return Integer.valueOf(x - y);
}
/**
* product of two integers
*
* @param x
* @param y
* @return
*/
public Integer multiply(Integer x, Integer y) {
return Integer.valueOf(x * y);
}
/**
* division of two integers x/y
*
* @param x
* @param y
* @return
*/
public Double divide(Integer x, Integer y) {
return Double.valueOf((double) x / y);
}
/**
* modulus of two integers
*
* @param x
* @param y
* @return
*/
public Integer mod(Integer x, Integer y) {
return Integer.valueOf(x % y);
}
/**
* power of two integers x^y
*
* @param x
* @param y
* @return
*/
public Integer power(Integer x, Integer y) {
return Integer.valueOf((int) Math.pow(x, y));
}
/**
* root of two integers X√Y
*
* @param x
* @param y
* @return
*/
public Integer root(Integer x, Integer y) {
return Integer.valueOf((int) Math.pow(x, 1.0 / y));
}
}

14
week3_TinsaeGhilay/Task 2/src/server/Server.java
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@@ -24,20 +24,24 @@ public class Server {
// start XML-RPC server at port 8080
WebServer server = new WebServer(8080);
XmlRpcServer xmlRpcServer = server.getXmlRpcServer();
PropertyHandlerMapping phm = new PropertyHandlerMapping();
phm.addHandler("sample", Server.class);
phm.addHandler("calculator", Executor.class);
xmlRpcServer.setHandlerMapping(phm);
server.start();
System.out.println(TAG + ": Server started successfully.");
System.out.println("Accepting requests. (Halt program to stop.)");
} catch (Exception e) { // catch exceptions if problems occur
System.err.println(TAG + ": " + e.getMessage());
}
}
public Integer sum(Integer x, Integer y) {
return Integer.valueOf(x + y);
}
}

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41
week3_TinsaeGhilay/Task 3/src/client/Client.java Normal file
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package client;
// Client/Client.java class represents the client that has to relay on the Hello engine
// to perform tasks remotely.
// it needs the Hello interface from Hello package
import hello.Hello;
// it also needs those to access the registry,
// so it can get remote object reference of the server
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.util.Scanner;
public class Client {
private Client() {
}
public static void main(String[] args) {
// normally, the address of the server is passed here on the command line as an
// argument
// we get that address from args[0] if provided, else we use null for localhost
String host = (args.length < 1) ? null : args[0];
String name = "Hello";
try (Scanner scanner = new Scanner(System.in);) {
// get the registry from host(server)
Registry registry = LocateRegistry.getRegistry(host);
// look up the remote object by name in the registry
// stub is the a reference to the remote object
Hello stub = (Hello) registry.lookup(name);
String response = stub.sayHello();
System.out.println("response: " + response);
} catch (Exception e) {
System.err.println("Client exception: " + e.getMessage());
}
}
}

12
week3_TinsaeGhilay/Task 3/src/hello/Hello.java Normal file
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@@ -0,0 +1,12 @@
package hello;
import java.rmi.Remote;
import java.rmi.RemoteException;
// this interface extends the interface "java.rmi.Remote"
// so its methods can be invoked from another Java virtual machine
public interface Hello extends Remote {
// say hello method, This is a repeat of task 1(done as part of learning RMI)
String sayHello() throws RemoteException;
}

56
week3_TinsaeGhilay/Task 3/src/server/Server.java Normal file
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@@ -0,0 +1,56 @@
package server;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;
// needs the compute and task interfaces from compute package
// define constructor for each
// and provide an implementation for each remote method in the remote interfaces
import hello.Hello;
/**
* The implementation of the Compute interface for the compute engine.
* it has to declare the remote class to be implemented (in this case Compute
* (implements it)
*/
public class Server implements Hello {
public Server() {
super();
}
@Override
public String sayHello() throws RemoteException {
return "Hello, world!";
}
// entry
public static void main(String[] args) {
// the code provided on the tutorial was deprecated.
// so google led me to
// [this](https://docs.oracle.com/javase/8/docs/technotes/guides/rmi/hello/hello-world.html#create)
try {
String name = "Hello";
// create remote object that provides service (server).
Hello server = new Server();
// and export remote object to java RMI runtime
// so it may receive remote incoming calls
Hello stub = (Hello) UnicastRemoteObject.exportObject(server, 0);
// the register the remote object with java RMI registry
// the registry is a name service that allows clients get a reference of remote
// objects
// once a remote object is registered, callers can look up the object by name
// and obtain its remote object reference
Registry registry = LocateRegistry.getRegistry();
registry.rebind(name, stub);
System.out.println("Server bound");
} catch (Exception e) {
System.err.println("Server exception: " + e.getMessage());
}
}
}

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week3_TinsaeGhilay/Task 4/src/client/Client.java Normal file
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@@ -0,0 +1,44 @@
package client;
// Client/Client.java class represents the client that has to relay on the Hello engine
// to perform tasks remotely.
// it needs the Hello interface from Hello package
import compute.Compute;
// it also needs those to access the registry,
// so it can get remote object reference of the server
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.util.Scanner;
public class Client {
private Client() {
}
public static void main(String[] args) {
// normally, the address of the server is passed here on the command line as an
// argument
// we get that address from args[0] if provided, else we use null for localhost
String host = (args.length < 1) ? null : args[0];
try (Scanner scanner = new Scanner(System.in);) {
// get the registry from host(server)
Registry registry = LocateRegistry.getRegistry(host);
// look up the remote object by name in the registry
// stub is the a reference to the remote object
Compute stub = (Compute) registry.lookup(Compute.SERVICE_NAME);
boolean isAuthenticated = stub.authenticate();
if (isAuthenticated) {
System.out.println("Client authenticated successfully. Door opens.");
} else {
System.out.println("Client authentication failed. Door remains closed.");
}
} catch (Exception e) {
System.err.println("Client exception: " + e.getMessage());
}
}
}

13
week3_TinsaeGhilay/Task 4/src/compute/Compute.java Normal file
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@@ -0,0 +1,13 @@
package compute;
import java.rmi.Remote;
import java.rmi.RemoteException;
// this interface extends the interface "java.rmi.Remote"
// so its methods can be invoked from another Java virtual machine
public interface Compute extends Remote {
static final String SERVICE_NAME = "authenticator";
// say hello method, This is a repeat of task 1(done as part of learning RMI)
boolean authenticate() throws RemoteException;
}

65
week3_TinsaeGhilay/Task 4/src/server/Server.java Normal file
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@@ -0,0 +1,65 @@
package server;
/**
* Server implementation for the Compute interface
* @author Tinsae Ghilay
*
* mimics an authentication service for some client to access a secure resource
* (mocked as a door that opens or remains closed based on authentication result)
* verification is done randomly for demo purposes
*/
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;
import java.util.Random;
// needs the compute and task interfaces from compute package
// define constructor for each
// and provide an implementation for each remote method in the remote interfaces
import compute.Compute;
/**
* The implementation of the Compute interface for the compute engine.
* it has to declare the remote class to be implemented (in this case Compute
* (implements it)
*/
public class Server implements Compute {
public Server() {
super();
}
@Override
public boolean authenticate() throws RemoteException {
return new Random().nextBoolean();
}
// entry
public static void main(String[] args) {
// the code provided on the tutorial was deprecated.
// so google led me to
// [this](https://docs.oracle.com/javase/8/docs/technotes/guides/rmi/hello/hello-world.html#create)
try {
// create remote object that provides service (server).
Compute server = new Server();
// and export remote object to java RMI runtime
// so it may receive remote incoming calls
Compute stub = (Compute) UnicastRemoteObject.exportObject(server, 0);
// the register the remote object with java RMI registry
// the registry is a name service that allows clients get a reference of remote
// objects
// once a remote object is registered, callers can look up the object by name
// and obtain its remote object reference
Registry registry = LocateRegistry.createRegistry(1099);
registry.rebind(Compute.SERVICE_NAME, stub);
System.out.println("Server bound");
} catch (Exception e) {
System.err.println("Server exception: " + e.getMessage());
}
}
}

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70
week3_TinsaeGhilay/Task 7/example/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.tinsae.grpc</groupId>
<artifactId>example</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-netty-shaded</artifactId>
<version>1.49.0</version>
</dependency>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-protobuf</artifactId>
<version>1.49.0</version>
</dependency>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-stub</artifactId>
<version>1.49.0</version>
</dependency>
<dependency> <!-- necessary for Java 9+ -->
<groupId>org.apache.tomcat</groupId>
<artifactId>annotations-api</artifactId>
<version>6.0.53</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<extensions>
<extension>
<groupId>kr.motd.maven</groupId>
<artifactId>os-maven-plugin</artifactId>
<version>1.6.2</version>
</extension>
</extensions>
<plugins>
<plugin>
<groupId>org.xolstice.maven.plugins</groupId>
<artifactId>protobuf-maven-plugin</artifactId>
<version>0.6.1</version>
<configuration>
<protocArtifact>com.google.protobuf:protoc:3.21.1:exe:${os.detected.classifier}</protocArtifact>
<pluginId>grpc-java</pluginId>
<skip>true</skip>
<pluginArtifact>io.grpc:protoc-gen-grpc-java:1.49.0:exe:${os.detected.classifier}</pluginArtifact>
</configuration>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>compile-custom</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

567
week3_TinsaeGhilay/Task 7/example/src/main/java/org/tinsae/grpc/HelloReply.java Normal file
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@@ -0,0 +1,567 @@
// Generated by the protocol buffer compiler. DO NOT EDIT!
// source: HelloWorldServiceProtos.proto
package org.tinsae.grpc;
/**
* <pre>
* The response message containing the response
* </pre>
*
* Protobuf type {@code org.tinsae.grpc.HelloReply}
*/
public final class HelloReply extends
com.google.protobuf.GeneratedMessageV3 implements
// @@protoc_insertion_point(message_implements:org.tinsae.grpc.HelloReply)
HelloReplyOrBuilder {
private static final long serialVersionUID = 0L;
// Use HelloReply.newBuilder() to construct.
private HelloReply(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
super(builder);
}
private HelloReply() {
message_ = "";
}
@java.lang.Override
@SuppressWarnings({"unused"})
protected java.lang.Object newInstance(
UnusedPrivateParameter unused) {
return new HelloReply();
}
@java.lang.Override
public final com.google.protobuf.UnknownFieldSet
getUnknownFields() {
return this.unknownFields;
}
private HelloReply(
com.google.protobuf.CodedInputStream input,
com.google.protobuf.ExtensionRegistryLite extensionRegistry)
throws com.google.protobuf.InvalidProtocolBufferException {
this();
if (extensionRegistry == null) {
throw new java.lang.NullPointerException();
}
com.google.protobuf.UnknownFieldSet.Builder unknownFields =
com.google.protobuf.UnknownFieldSet.newBuilder();
try {
boolean done = false;
while (!done) {
int tag = input.readTag();
switch (tag) {
case 0:
done = true;
break;
case 10: {
java.lang.String s = input.readStringRequireUtf8();
message_ = s;
break;
}
default: {
if (!parseUnknownField(
input, unknownFields, extensionRegistry, tag)) {
done = true;
}
break;
}
}
}
} catch (com.google.protobuf.InvalidProtocolBufferException e) {
throw e.setUnfinishedMessage(this);
} catch (com.google.protobuf.UninitializedMessageException e) {
throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
} catch (java.io.IOException e) {
throw new com.google.protobuf.InvalidProtocolBufferException(
e).setUnfinishedMessage(this);
} finally {
this.unknownFields = unknownFields.build();
makeExtensionsImmutable();
}
}
public static final com.google.protobuf.Descriptors.Descriptor
getDescriptor() {
return org.tinsae.grpc.HelloWorldServiceProtos.internal_static_org_tinsae_grpc_HelloReply_descriptor;
}
@java.lang.Override
protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
internalGetFieldAccessorTable() {
return org.tinsae.grpc.HelloWorldServiceProtos.internal_static_org_tinsae_grpc_HelloReply_fieldAccessorTable
.ensureFieldAccessorsInitialized(
org.tinsae.grpc.HelloReply.class, org.tinsae.grpc.HelloReply.Builder.class);
}
public static final int MESSAGE_FIELD_NUMBER = 1;
private volatile java.lang.Object message_;
/**
* <code>string message = 1;</code>
* @return The message.
*/
@java.lang.Override
public java.lang.String getMessage() {
java.lang.Object ref = message_;
if (ref instanceof java.lang.String) {
return (java.lang.String) ref;
} else {
com.google.protobuf.ByteString bs =
(com.google.protobuf.ByteString) ref;
java.lang.String s = bs.toStringUtf8();
message_ = s;
return s;
}
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return super.clearField(field);
}
@java.lang.Override
public Builder clearOneof(
com.google.protobuf.Descriptors.OneofDescriptor oneof) {
return super.clearOneof(oneof);
}
@java.lang.Override
public Builder setRepeatedField(
com.google.protobuf.Descriptors.FieldDescriptor field,
int index, java.lang.Object value) {
return super.setRepeatedField(field, index, value);
}
@java.lang.Override
public Builder addRepeatedField(
com.google.protobuf.Descriptors.FieldDescriptor field,
java.lang.Object value) {
return super.addRepeatedField(field, value);
}
@java.lang.Override
public Builder mergeFrom(com.google.protobuf.Message other) {
if (other instanceof org.tinsae.grpc.HelloRequest) {
return mergeFrom((org.tinsae.grpc.HelloRequest)other);
} else {
super.mergeFrom(other);
return this;
}
}
public Builder mergeFrom(org.tinsae.grpc.HelloRequest other) {
if (other == org.tinsae.grpc.HelloRequest.getDefaultInstance()) return this;
if (!other.getName().isEmpty()) {
name_ = other.name_;
onChanged();
}
this.mergeUnknownFields(other.unknownFields);
onChanged();
return this;
}
@java.lang.Override
public final boolean isInitialized() {
return true;
}
@java.lang.Override
public Builder mergeFrom(
com.google.protobuf.CodedInputStream input,
com.google.protobuf.ExtensionRegistryLite extensionRegistry)
throws java.io.IOException {
org.tinsae.grpc.HelloRequest parsedMessage = null;
try {
parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
} catch (com.google.protobuf.InvalidProtocolBufferException e) {
parsedMessage = (org.tinsae.grpc.HelloRequest) e.getUnfinishedMessage();
throw e.unwrapIOException();
} finally {
if (parsedMessage != null) {
mergeFrom(parsedMessage);
}
}
return this;
}
private java.lang.Object name_ = "";
/**
* <code>string name = 1;</code>
* @return The name.
*/
public java.lang.String getName() {
java.lang.Object ref = name_;
if (!(ref instanceof java.lang.String)) {
com.google.protobuf.ByteString bs =
(com.google.protobuf.ByteString) ref;
java.lang.String s = bs.toStringUtf8();
name_ = s;
return s;
} else {
return (java.lang.String) ref;
}
}
/**
* <code>string name = 1;</code>
* @return The bytes for name.
*/
public com.google.protobuf.ByteString
getNameBytes() {
java.lang.Object ref = name_;
if (ref instanceof String) {
com.google.protobuf.ByteString b =
com.google.protobuf.ByteString.copyFromUtf8(
(java.lang.String) ref);
name_ = b;
return b;
} else {
return (com.google.protobuf.ByteString) ref;
}
}
/**
* <code>string name = 1;</code>
* @param value The name to set.
* @return This builder for chaining.
*/
public Builder setName(
java.lang.String value) {
if (value == null) {
throw new NullPointerException();
}
name_ = value;
onChanged();
return this;
}
/**
* <code>string name = 1;</code>
* @return This builder for chaining.
*/
public Builder clearName() {
name_ = getDefaultInstance().getName();
onChanged();
return this;
}
/**
* <code>string name = 1;</code>
* @param value The bytes for name to set.
* @return This builder for chaining.
*/
public Builder setNameBytes(
com.google.protobuf.ByteString value) {
if (value == null) {
throw new NullPointerException();
}
checkByteStringIsUtf8(value);
name_ = value;
onChanged();
return this;
}
@java.lang.Override
public final Builder setUnknownFields(
final com.google.protobuf.UnknownFieldSet unknownFields) {
return super.setUnknownFields(unknownFields);
}
@java.lang.Override
public final Builder mergeUnknownFields(
final com.google.protobuf.UnknownFieldSet unknownFields) {
return super.mergeUnknownFields(unknownFields);
}
// @@protoc_insertion_point(builder_scope:org.tinsae.grpc.HelloRequest)
}
// @@protoc_insertion_point(class_scope:org.tinsae.grpc.HelloRequest)
private static final org.tinsae.grpc.HelloRequest DEFAULT_INSTANCE;
static {
DEFAULT_INSTANCE = new org.tinsae.grpc.HelloRequest();
}
public static org.tinsae.grpc.HelloRequest getDefaultInstance() {
return DEFAULT_INSTANCE;
}
private static final com.google.protobuf.Parser<HelloRequest>
PARSER = new com.google.protobuf.AbstractParser<HelloRequest>() {
@java.lang.Override
public HelloRequest parsePartialFrom(
com.google.protobuf.CodedInputStream input,
com.google.protobuf.ExtensionRegistryLite extensionRegistry)
throws com.google.protobuf.InvalidProtocolBufferException {
return new HelloRequest(input, extensionRegistry);
}
};
public static com.google.protobuf.Parser<HelloRequest> parser() {
return PARSER;
}
@java.lang.Override
public com.google.protobuf.Parser<HelloRequest> getParserForType() {
return PARSER;
}
@java.lang.Override
public org.tinsae.grpc.HelloRequest getDefaultInstanceForType() {
return DEFAULT_INSTANCE;
}
}

21
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@@ -0,0 +1,21 @@
// Generated by the protocol buffer compiler. DO NOT EDIT!
// source: HelloWorldServiceProtos.proto
package org.tinsae.grpc;
public interface HelloRequestOrBuilder extends
// @@protoc_insertion_point(interface_extends:org.tinsae.grpc.HelloRequest)
com.google.protobuf.MessageOrBuilder {
/**
* <code>string name = 1;</code>
* @return The name.
*/
java.lang.String getName();
/**
* <code>string name = 1;</code>
* @return The bytes for name.
*/
com.google.protobuf.ByteString
getNameBytes();
}

291
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@@ -0,0 +1,291 @@
package org.tinsae.grpc;
import static io.grpc.MethodDescriptor.generateFullMethodName;
/**
* <pre>
* The greeting service definition
* </pre>
*/
@javax.annotation.Generated(
value = "by gRPC proto compiler (version 1.49.0)",
comments = "Source: HelloWorldServiceProtos.proto")
@io.grpc.stub.annotations.GrpcGenerated
public final class HelloWorldServiceGrpc {
private HelloWorldServiceGrpc() {}
public static final String SERVICE_NAME = "org.tinsae.grpc.HelloWorldService";
// Static method descriptors that strictly reflect the proto.
private static volatile io.grpc.MethodDescriptor<org.tinsae.grpc.HelloRequest,
org.tinsae.grpc.HelloReply> getSayHelloMethod;
@io.grpc.stub.annotations.RpcMethod(
fullMethodName = SERVICE_NAME + '/' + "sayHello",
requestType = org.tinsae.grpc.HelloRequest.class,
responseType = org.tinsae.grpc.HelloReply.class,
methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
public static io.grpc.MethodDescriptor<org.tinsae.grpc.HelloRequest,
org.tinsae.grpc.HelloReply> getSayHelloMethod() {
io.grpc.MethodDescriptor<org.tinsae.grpc.HelloRequest, org.tinsae.grpc.HelloReply> getSayHelloMethod;
if ((getSayHelloMethod = HelloWorldServiceGrpc.getSayHelloMethod) == null) {
synchronized (HelloWorldServiceGrpc.class) {
if ((getSayHelloMethod = HelloWorldServiceGrpc.getSayHelloMethod) == null) {
HelloWorldServiceGrpc.getSayHelloMethod = getSayHelloMethod =
io.grpc.MethodDescriptor.<org.tinsae.grpc.HelloRequest, org.tinsae.grpc.HelloReply>newBuilder()
.setType(io.grpc.MethodDescriptor.MethodType.UNARY)
.setFullMethodName(generateFullMethodName(SERVICE_NAME, "sayHello"))
.setSampledToLocalTracing(true)
.setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
org.tinsae.grpc.HelloRequest.getDefaultInstance()))
.setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
org.tinsae.grpc.HelloReply.getDefaultInstance()))
.setSchemaDescriptor(new HelloWorldServiceMethodDescriptorSupplier("sayHello"))
.build();
}
}
}
return getSayHelloMethod;
}
/**
* Creates a new async stub that supports all call types for the service
*/
public static HelloWorldServiceStub newStub(io.grpc.Channel channel) {
io.grpc.stub.AbstractStub.StubFactory<HelloWorldServiceStub> factory =
new io.grpc.stub.AbstractStub.StubFactory<HelloWorldServiceStub>() {
@java.lang.Override
public HelloWorldServiceStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
return new HelloWorldServiceStub(channel, callOptions);
}
};
return HelloWorldServiceStub.newStub(factory, channel);
}
/**
* Creates a new blocking-style stub that supports unary and streaming output calls on the service
*/
public static HelloWorldServiceBlockingStub newBlockingStub(
io.grpc.Channel channel) {
io.grpc.stub.AbstractStub.StubFactory<HelloWorldServiceBlockingStub> factory =
new io.grpc.stub.AbstractStub.StubFactory<HelloWorldServiceBlockingStub>() {
@java.lang.Override
public HelloWorldServiceBlockingStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
return new HelloWorldServiceBlockingStub(channel, callOptions);
}
};
return HelloWorldServiceBlockingStub.newStub(factory, channel);
}
/**
* Creates a new ListenableFuture-style stub that supports unary calls on the service
*/
public static HelloWorldServiceFutureStub newFutureStub(
io.grpc.Channel channel) {
io.grpc.stub.AbstractStub.StubFactory<HelloWorldServiceFutureStub> factory =
new io.grpc.stub.AbstractStub.StubFactory<HelloWorldServiceFutureStub>() {
@java.lang.Override
public HelloWorldServiceFutureStub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
return new HelloWorldServiceFutureStub(channel, callOptions);
}
};
return HelloWorldServiceFutureStub.newStub(factory, channel);
}
/**
* <pre>
* The greeting service definition
* </pre>
*/
public static abstract class HelloWorldServiceImplBase implements io.grpc.BindableService {
/**
*/
public void sayHello(org.tinsae.grpc.HelloRequest request,
io.grpc.stub.StreamObserver<org.tinsae.grpc.HelloReply> responseObserver) {
io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall(getSayHelloMethod(), responseObserver);
}
@java.lang.Override public final io.grpc.ServerServiceDefinition bindService() {
return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
.addMethod(
getSayHelloMethod(),
io.grpc.stub.ServerCalls.asyncUnaryCall(
new MethodHandlers<
org.tinsae.grpc.HelloRequest,
org.tinsae.grpc.HelloReply>(
this, METHODID_SAY_HELLO)))
.build();
}
}
/**
* <pre>
* The greeting service definition
* </pre>
*/
public static final class HelloWorldServiceStub extends io.grpc.stub.AbstractAsyncStub<HelloWorldServiceStub> {
private HelloWorldServiceStub(
io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
super(channel, callOptions);
}
@java.lang.Override
protected HelloWorldServiceStub build(
io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
return new HelloWorldServiceStub(channel, callOptions);
}
/**
*/
public void sayHello(org.tinsae.grpc.HelloRequest request,
io.grpc.stub.StreamObserver<org.tinsae.grpc.HelloReply> responseObserver) {
io.grpc.stub.ClientCalls.asyncUnaryCall(
getChannel().newCall(getSayHelloMethod(), getCallOptions()), request, responseObserver);
}
}
/**
* <pre>
* The greeting service definition
* </pre>
*/
public static final class HelloWorldServiceBlockingStub extends io.grpc.stub.AbstractBlockingStub<HelloWorldServiceBlockingStub> {
private HelloWorldServiceBlockingStub(
io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
super(channel, callOptions);
}
@java.lang.Override
protected HelloWorldServiceBlockingStub build(
io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
return new HelloWorldServiceBlockingStub(channel, callOptions);
}
/**
*/
public org.tinsae.grpc.HelloReply sayHello(org.tinsae.grpc.HelloRequest request) {
return io.grpc.stub.ClientCalls.blockingUnaryCall(
getChannel(), getSayHelloMethod(), getCallOptions(), request);
}
}
/**
* <pre>
* The greeting service definition
* </pre>
*/
public static final class HelloWorldServiceFutureStub extends io.grpc.stub.AbstractFutureStub<HelloWorldServiceFutureStub> {
private HelloWorldServiceFutureStub(
io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
super(channel, callOptions);
}
@java.lang.Override
protected HelloWorldServiceFutureStub build(
io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
return new HelloWorldServiceFutureStub(channel, callOptions);
}
/**
*/
public com.google.common.util.concurrent.ListenableFuture<org.tinsae.grpc.HelloReply> sayHello(
org.tinsae.grpc.HelloRequest request) {
return io.grpc.stub.ClientCalls.futureUnaryCall(
getChannel().newCall(getSayHelloMethod(), getCallOptions()), request);
}
}
private static final int METHODID_SAY_HELLO = 0;
private static final class MethodHandlers<Req, Resp> implements
io.grpc.stub.ServerCalls.UnaryMethod<Req, Resp>,
io.grpc.stub.ServerCalls.ServerStreamingMethod<Req, Resp>,
io.grpc.stub.ServerCalls.ClientStreamingMethod<Req, Resp>,
io.grpc.stub.ServerCalls.BidiStreamingMethod<Req, Resp> {
private final HelloWorldServiceImplBase serviceImpl;
private final int methodId;
MethodHandlers(HelloWorldServiceImplBase serviceImpl, int methodId) {
this.serviceImpl = serviceImpl;
this.methodId = methodId;
}
@java.lang.Override
@java.lang.SuppressWarnings("unchecked")
public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
switch (methodId) {
case METHODID_SAY_HELLO:
serviceImpl.sayHello((org.tinsae.grpc.HelloRequest) request,
(io.grpc.stub.StreamObserver<org.tinsae.grpc.HelloReply>) responseObserver);
break;
default:
throw new AssertionError();
}
}
@java.lang.Override
@java.lang.SuppressWarnings("unchecked")
public io.grpc.stub.StreamObserver<Req> invoke(
io.grpc.stub.StreamObserver<Resp> responseObserver) {
switch (methodId) {
default:
throw new AssertionError();
}
}
}
private static abstract class HelloWorldServiceBaseDescriptorSupplier
implements io.grpc.protobuf.ProtoFileDescriptorSupplier, io.grpc.protobuf.ProtoServiceDescriptorSupplier {
HelloWorldServiceBaseDescriptorSupplier() {}
@java.lang.Override
public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
return org.tinsae.grpc.HelloWorldServiceProtos.getDescriptor();
}
@java.lang.Override
public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
return getFileDescriptor().findServiceByName("HelloWorldService");
}
}
private static final class HelloWorldServiceFileDescriptorSupplier
extends HelloWorldServiceBaseDescriptorSupplier {
HelloWorldServiceFileDescriptorSupplier() {}
}
private static final class HelloWorldServiceMethodDescriptorSupplier
extends HelloWorldServiceBaseDescriptorSupplier
implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
private final String methodName;
HelloWorldServiceMethodDescriptorSupplier(String methodName) {
this.methodName = methodName;
}
@java.lang.Override
public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
return getServiceDescriptor().findMethodByName(methodName);
}
}
private static volatile io.grpc.ServiceDescriptor serviceDescriptor;
public static io.grpc.ServiceDescriptor getServiceDescriptor() {
io.grpc.ServiceDescriptor result = serviceDescriptor;
if (result == null) {
synchronized (HelloWorldServiceGrpc.class) {
result = serviceDescriptor;
if (result == null) {
serviceDescriptor = result = io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
.setSchemaDescriptor(new HelloWorldServiceFileDescriptorSupplier())
.addMethod(getSayHelloMethod())
.build();
}
}
}
return result;
}
}

20
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package org.tinsae.grpc;
import io.grpc.stub.StreamObserver;
public class HelloWorldServiceImpl extends
HelloWorldServiceGrpc.HelloWorldServiceImplBase {
@Override
public void sayHello(HelloRequest req, StreamObserver<HelloReply> responseObserver) {
System.out.println("Hello! Received: " + req.getName());
System.out.println("Sending back: Hello " + req.getName());
HelloReply reply = HelloReply.newBuilder().setMessage("Hello " + req.getName()).build();
responseObserver.onNext(reply);
responseObserver.onCompleted();
}
}

63
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@@ -0,0 +1,63 @@
// Generated by the protocol buffer compiler. DO NOT EDIT!
// source: HelloWorldServiceProtos.proto
package org.tinsae.grpc;
public final class HelloWorldServiceProtos {
private HelloWorldServiceProtos() {}
public static void registerAllExtensions(
com.google.protobuf.ExtensionRegistryLite registry) {
}
public static void registerAllExtensions(
com.google.protobuf.ExtensionRegistry registry) {
registerAllExtensions(
(com.google.protobuf.ExtensionRegistryLite) registry);
}
static final com.google.protobuf.Descriptors.Descriptor
internal_static_org_tinsae_grpc_HelloRequest_descriptor;
static final
com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
internal_static_org_tinsae_grpc_HelloRequest_fieldAccessorTable;
static final com.google.protobuf.Descriptors.Descriptor
internal_static_org_tinsae_grpc_HelloReply_descriptor;
static final
com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
internal_static_org_tinsae_grpc_HelloReply_fieldAccessorTable;
public static com.google.protobuf.Descriptors.FileDescriptor
getDescriptor() {
return descriptor;
}
private static com.google.protobuf.Descriptors.FileDescriptor
descriptor;
static {
java.lang.String[] descriptorData = {
"\n\035HelloWorldServiceProtos.proto\022\017org.tin" +
"sae.grpc\"\034\n\014HelloRequest\022\014\n\004name\030\001 \001(\t\"\035" +
"\n\nHelloReply\022\017\n\007message\030\001 \001(\t2[\n\021HelloWo" +
"rldService\022F\n\010sayHello\022\035.org.tinsae.grpc" +
".HelloRequest\032\033.org.tinsae.grpc.HelloRep" +
"lyB,\n\017org.tinsae.grpcB\027HelloWorldService" +
"ProtosP\001b\006proto3"
};
descriptor = com.google.protobuf.Descriptors.FileDescriptor
.internalBuildGeneratedFileFrom(descriptorData,
new com.google.protobuf.Descriptors.FileDescriptor[] {
});
internal_static_org_tinsae_grpc_HelloRequest_descriptor =
getDescriptor().getMessageTypes().get(0);
internal_static_org_tinsae_grpc_HelloRequest_fieldAccessorTable = new
com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
internal_static_org_tinsae_grpc_HelloRequest_descriptor,
new java.lang.String[] { "Name", });
internal_static_org_tinsae_grpc_HelloReply_descriptor =
getDescriptor().getMessageTypes().get(1);
internal_static_org_tinsae_grpc_HelloReply_fieldAccessorTable = new
com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
internal_static_org_tinsae_grpc_HelloReply_descriptor,
new java.lang.String[] { "Message", });
}
// @@protoc_insertion_point(outer_class_scope)
}

26
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package org.tinsae.grpc.client;
import org.tinsae.grpc.HelloReply;
import org.tinsae.grpc.HelloRequest;
import org.tinsae.grpc.HelloWorldServiceGrpc;
import io.grpc.ManagedChannel;
import io.grpc.ManagedChannelBuilder;
public class HelloWorldClient {
public static void main(String[] args) {
ManagedChannel channel = ManagedChannelBuilder.forAddress("localhost",
8080)
.usePlaintext()
.build();
HelloWorldServiceGrpc.HelloWorldServiceBlockingStub stub = HelloWorldServiceGrpc.newBlockingStub(channel);
HelloRequest request = HelloRequest.newBuilder().setName("Andrea").build();
HelloReply response = stub.sayHello(request);
System.out.println("Response: " + response.getMessage());
}
}

18
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@@ -0,0 +1,18 @@
package org.tinsae.grpc.server;
import org.tinsae.grpc.HelloWorldServiceImpl;
import io.grpc.Server;
import io.grpc.ServerBuilder;
import java.io.IOException;
public class HelloWorldServer {
public static void main(String[] args) throws IOException,
InterruptedException {
Server server = ServerBuilder.forPort(8080)
.addService(new HelloWorldServiceImpl())
.build();
server.start();
System.out.println("Server started...");
server.awaitTermination();
}
}

22
week3_TinsaeGhilay/Task 7/example/src/main/proto/HelloWorldServiceProtos.proto Normal file
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syntax = "proto3";
option java_multiple_files = true;
option java_package = "org.tinsae.grpc";
option java_outer_classname = "HelloWorldServiceProtos";
package org.tinsae.grpc;
// The greeting service definition
service HelloWorldService {
rpc sayHello ( HelloRequest) returns ( HelloReply);
}
// The request message containing the user's name
message HelloRequest {
string name = 1;
}
// The response message containing the response
message HelloReply {
string message = 1;
}

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artifactId=example
groupId=org.tinsae.grpc
version=1.0-SNAPSHOT

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org/tinsae/grpc/HelloReply$1.class
org/tinsae/grpc/HelloWorldServiceGrpc$HelloWorldServiceFileDescriptorSupplier.class
org/tinsae/grpc/HelloWorldServiceGrpc$3.class
org/tinsae/grpc/client/HelloWorldClient.class
org/tinsae/grpc/HelloRequestOrBuilder.class
org/tinsae/grpc/HelloWorldServiceGrpc$HelloWorldServiceImplBase.class
org/tinsae/grpc/HelloWorldServiceGrpc$1.class
org/tinsae/grpc/HelloRequest.class
org/tinsae/grpc/HelloWorldServiceGrpc$HelloWorldServiceMethodDescriptorSupplier.class
org/tinsae/grpc/server/HelloWorldServer.class
org/tinsae/grpc/HelloWorldServiceGrpc$HelloWorldServiceBaseDescriptorSupplier.class
org/tinsae/grpc/HelloRequest$1.class
org/tinsae/grpc/HelloReplyOrBuilder.class
org/tinsae/grpc/HelloWorldServiceGrpc$MethodHandlers.class
org/tinsae/grpc/HelloWorldServiceProtos.class
org/tinsae/grpc/HelloWorldServiceImpl.class
org/tinsae/grpc/HelloWorldServiceGrpc.class
org/tinsae/grpc/HelloWorldServiceGrpc$HelloWorldServiceStub.class
org/tinsae/grpc/HelloReply$Builder.class
org/tinsae/grpc/HelloRequest$Builder.class
org/tinsae/grpc/HelloWorldServiceGrpc$HelloWorldServiceBlockingStub.class
org/tinsae/grpc/HelloWorldServiceGrpc$2.class
org/tinsae/grpc/HelloWorldServiceGrpc$HelloWorldServiceFutureStub.class
org/tinsae/grpc/HelloReply.class

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/home/tgk/Repos/Trusted/DistributedSystems/week3_TinsaeGhilay/Task 7/example/src/main/java/org/tinsae/grpc/HelloReply.java
/home/tgk/Repos/Trusted/DistributedSystems/week3_TinsaeGhilay/Task 7/example/src/main/java/org/tinsae/grpc/HelloReplyOrBuilder.java
/home/tgk/Repos/Trusted/DistributedSystems/week3_TinsaeGhilay/Task 7/example/src/main/java/org/tinsae/grpc/HelloRequest.java
/home/tgk/Repos/Trusted/DistributedSystems/week3_TinsaeGhilay/Task 7/example/src/main/java/org/tinsae/grpc/HelloRequestOrBuilder.java
/home/tgk/Repos/Trusted/DistributedSystems/week3_TinsaeGhilay/Task 7/example/src/main/java/org/tinsae/grpc/HelloWorldServiceGrpc.java
/home/tgk/Repos/Trusted/DistributedSystems/week3_TinsaeGhilay/Task 7/example/src/main/java/org/tinsae/grpc/HelloWorldServiceImpl.java
/home/tgk/Repos/Trusted/DistributedSystems/week3_TinsaeGhilay/Task 7/example/src/main/java/org/tinsae/grpc/HelloWorldServiceProtos.java
/home/tgk/Repos/Trusted/DistributedSystems/week3_TinsaeGhilay/Task 7/example/src/main/java/org/tinsae/grpc/client/HelloWorldClient.java
/home/tgk/Repos/Trusted/DistributedSystems/week3_TinsaeGhilay/Task 7/example/src/main/java/org/tinsae/grpc/server/HelloWorldServer.java

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Exercise 1: not mandatory
Exercise 2: done 100%
Exercise 3: done 100%
Exercise 4: not mandatory
Exercise 5: done 100%
Exercise 6: not mandatory
Exercise 7: done 100%