task 2 ongoing

week3_TinsaeGhilay/Task 2/src/client/Client.java

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+
+package client;
+
+import java.util.Vector;
+import java.util.Scanner;
+import java.net.URL;
+
+/**
+ * Client class for XML-RPC communication
+ * 
+ * @author Tinsae Ghilay
+ *         from the example on
+ *         https://www.tutorialspoint.com/xml-rpc/xml_rpc_examples.htm
+ */
+// import the org.apache.xmlrpc package
+// it contains classes for XML-RPC client (and server) implementation
+import org.apache.xmlrpc.*;
+import org.apache.xmlrpc.client.XmlRpcClient;
+import org.apache.xmlrpc.client.XmlRpcClientConfigImpl;
+
+public class Client {
+
+    private static String TAG = "Client";
+
+    public static void main(String[] args) {
+
+        try (Scanner scanner = new Scanner(System.in)) {
+            // create an XML-RPC client object with address to server @ localhost
+            // URL can be any valid URL. the default port for XML-RPC is 80
+            // but here we use 8080 since 80 may need root privileges
+            XmlRpcClientConfigImpl config = new XmlRpcClientConfigImpl();
+            config.setServerURL(new URL("http://localhost:8080/RPC2"));
+
+            XmlRpcClient client = new XmlRpcClient();
+            client.setConfig(config);
+
+            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);
+
+                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.sum", params);
+                // process the result
+                int sum = ((Integer) result).intValue();
+                System.out.println("The sum is: " + sum);
+
+            }
+
+        } catch (Exception e) { // catch exceptions if problems occur
+            System.err.println(TAG + ": " + e.getMessage());
+        }
+    }
+
+    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;
+    }
+
+}

week3_TinsaeGhilay/Task 2/src/server/Server.java

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+package server;
+
+/** 
+ * Server class for XML-RPC communication
+ * @author Tinsae Ghilay
+ *         from the example on
+ *         https://www.tutorialspoint.com/xml-rpc/xml_rpc_examples.htm
+ */
+
+// import the org.apache.xmlrpc package
+// it contains classes for XML-RPC client (and server) implementation
+import org.apache.xmlrpc.webserver.WebServer;
+import java.net.URL;
+import org.apache.xmlrpc.server.PropertyHandlerMapping;
+import org.apache.xmlrpc.server.XmlRpcServer;
+
+public class Server {
+
+    private static String TAG = "Server";
+
+    public static void main(String[] args) {
+
+        try {
+            // 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);
+            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);
+    }
+
+}