diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Garibay/Assignment_2_Output.PNG b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Garibay/Assignment_2_Output.PNG
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index 0000000000000000000000000000000000000000..a3b41584d12402956b667791cec03bfd8f9b3da6
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Garibay/GaribayClient.java b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Garibay/GaribayClient.java
new file mode 100644
index 0000000000000000000000000000000000000000..54f7d6be6479793e473fcfa4efe2c81b0b7b93b7
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Garibay/GaribayClient.java
@@ -0,0 +1,80 @@
+package MV3500Cohort2020JulySeptember.homework2.Garibay;
+
+import java.io.*;
+import java.net.*;
+/**
+ *
+ * @author Chris
+ */
+public class GaribayClient {
+
+ // IPv6 String constant for localhost address, similarly IPv4 127.0.0.1
+ public final static String LOCALHOST = "0:0:0:0:0:0:0:1";
+
+ public static void main(String[] args) {
+
+ // Local vars/fields
+ Socket socket;
+ InputStream is;
+ InputStreamReader isr;
+ BufferedReader br;
+ String serverMessage;
+ Integer count = 0;
+ OutputStream os;
+ PrintStream ps;
+
+
+ try {
+ while (true) {
+ System.out.println("TcpExample3Client creating socket...");
+
+ // We request an IP to connect to ("localhost") and
+ // port number at that IP (2317). This establishes
+ // a connection to that IP in the form of a Socket
+ // object; the server uses a ServerSocket to wait for
+ // connections.
+ socket = new Socket(LOCALHOST, 2317); // locohost?
+
+ // Now hook everything up (i.e. set up the streams), Java style:
+ is = socket.getInputStream();
+ isr = new InputStreamReader(is);
+ br = new BufferedReader(isr);
+
+
+ // Read a single line written by the server. We'd
+ // do things a bit differently if there were many lines to be read
+ // from the server instead of one only.
+ serverMessage = br.readLine();
+ System.out.println("==================================================");
+ System.out.println("'How many beer bottles are on the wall?");
+ System.out.println("The GaribayServer responds by saying: '" + serverMessage + "'");
+ System.out.println("GaribayClient says, 'There are "+ count +" beer bottles on the wall. Always good to have more beer bottles.");
+ count++;
+ // socket gets closed, either automatically/silently by this code (or possibly by the server)
+
+
+ // Now hook everything up (i.e. set up the streams), Java style:
+ os = socket.getOutputStream();
+ ps = new PrintStream(os);
+ ps.println("GaribayClient message."); // this gets sent back to client!
+
+ ps.flush();
+
+
+
+ } // end while(true)
+ } catch (IOException e) {
+ System.err.println("Problem with TcpExample3ServerClient networking:"); // describe what is happening
+ System.err.println("Error: " + e);
+
+ // Provide more helpful information to user if exception occurs due to running twice at one time
+ if (e instanceof java.net.BindException) {
+ System.err.println("*** Be sure to stop any other running instances of programs using this port!");
+ }
+ } finally {
+
+ // program exit: tell somebody about that
+ System.out.println("\nclient exit");
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Garibay/GaribayServer.java b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Garibay/GaribayServer.java
new file mode 100644
index 0000000000000000000000000000000000000000..353cdebcd1e38aeb2397d457b5a97ec064a4fc7c
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Garibay/GaribayServer.java
@@ -0,0 +1,93 @@
+package MV3500Cohort2020JulySeptember.homework2.Garibay;
+
+import java.io.*;
+import java.net.*;
+
+/**
+ *
+ * @author Chris
+ */
+public class GaribayServer {
+
+ public static void main(String[] args) {
+ try {
+
+ // ServerSocket waits for a connection from a client.
+ // Notice that it is outside the loop; ServerSocket
+ // needs to be made only once.
+ System.out.println("TcpExample3Server has started..."); // it helps debugging to put this on console first
+
+ ServerSocket serverSocket = new ServerSocket(2317);
+ OutputStream os;
+ PrintStream ps;
+ InetAddress localAddress, remoteAddress;
+
+ InputStream is;
+ InputStreamReader isr;
+ BufferedReader br;
+ String clientMessage;
+ int localPort, remotePort;
+
+ // Server is up and waiting (i.e. "blocked" or paused)
+ // Loop, infinitely, waiting for client connections.
+ // Stop the program somewhere else.
+ while (true) {
+
+ // block until connected to a client
+ try (Socket clientConnection = serverSocket.accept()) {
+
+ // Now hook everything up (i.e. set up the streams), Java style:
+ os = clientConnection.getOutputStream();
+ ps = new PrintStream(os);
+ ps.println("Count for yourself!"); // this gets sent back to client!
+
+ // Print some information locally about the Socket connection.
+ // This includes the port and IP numbers on both sides (the socket pair).
+ localAddress = clientConnection.getLocalAddress();
+ remoteAddress = clientConnection.getInetAddress();
+ localPort = clientConnection.getLocalPort();
+ remotePort = clientConnection.getPort();
+
+ // My socket pair connection looks like this, to localhost:
+ // Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54876 ))
+ // Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54881 ))
+
+ // Why is the first IP/port the same, while the second set has different ports?
+ System.out.println("TcpExample3Server socket pair: (( " + localAddress.toString() + ", " + localPort + " ), ( "
+ + remoteAddress.toString() + ", " + remotePort + " ))");
+
+ // Notice the use of flush() and try w/ resources. Without
+ // the try w/ resources the Socket object may stay open for
+ // a while after the client has stopped needing this
+ // connection. try w/ resources explicitly ends the connection.
+
+ // Now hook everything up (i.e. set up the streams), Java style:
+ is = clientConnection.getInputStream();
+ isr = new InputStreamReader(is);
+ br = new BufferedReader(isr);
+
+
+ // Read a single line written by the server. We'd
+ // do things a bit differently if there were many lines to be read
+ // from the server instead of one only.
+ clientMessage = br.readLine();
+ System.out.println("==================================================");
+ System.out.println("Now we're talking!");
+ System.out.println("The message the server sent was: '" + clientMessage + "'");
+// System.out.println("This was the "+ count +" connection.");
+
+
+ ps.flush();
+ // like it or not, you're outta here!
+ }
+ }
+ } catch (IOException e) {
+ System.err.println("Problem with TcpExample3Server networking: " + e);
+
+ // Provide more helpful information to user if exception occurs due to running twice at one time
+ if (e instanceof java.net.BindException) {
+ System.err.println("*** Be sure to stop any other running instances of programs using this port!");
+ }
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Garibay/GaribayUML.PNG b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Garibay/GaribayUML.PNG
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index 0000000000000000000000000000000000000000..b706e2dbc8bfceab4903de1f2fda5487afca82c8
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Goericke/GoerickeClient.java b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Goericke/GoerickeClient.java
new file mode 100644
index 0000000000000000000000000000000000000000..092a90ba4ddbd267e7aa0eccc98a4b70f25c3663
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Goericke/GoerickeClient.java
@@ -0,0 +1,75 @@
+package MV3500Cohort2020JulySeptember.homework2.Goericke;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.net.Socket;
+
+/**
+ *
+ * @author stefa
+ */
+public class GoerickeClient {
+
+ // IPv6 String constant for localhost address, similarly IPv4 127.0.0.1
+ public final static String LOCALHOST = "0:0:0:0:0:0:0:1";
+
+ public static void main(String[] args) {
+
+ // Local vars/fields
+ Socket socket;
+ InputStream is;
+ InputStreamReader isr;
+ BufferedReader br;
+ String serverMessage;
+
+ try {
+ while (true) {
+ System.out.println("\nGoerickeClient creating socket...");
+
+ // We request an IP to connect to ("localhost") and
+ // port number at that IP (2317). This establishes
+ // a connection to that IP in the form of a Socket
+ // object; the server uses a ServerSocket to wait for
+ // connections.
+ socket = new Socket(LOCALHOST, 2317); // locohost?
+
+ // thats my input stream
+ is = socket.getInputStream();
+ isr = new InputStreamReader(is);
+ br = new BufferedReader(isr);
+
+ // Read a single line written by the server. We'd
+ // do things a bit differently if there were many lines to be read
+ // from the server instead of one only.
+ serverMessage = br.readLine();
+ System.out.println("The message the server sent was: '" + serverMessage + "'");
+ // socket gets closed, either automatically/silently by this code (or possibly by the server)
+ if (serverMessage.contentEquals("Welcome, how are you !!!")) {
+ System.out.println("What a nice and friendly server");
+ } else if (serverMessage.contentEquals("Still alive there ?")){
+ System.out.println("Yes, I am ... still .... where else should I be");
+ } else{
+ System.out.println("Seems he does not have anything to tell");
+ }
+
+ } // end while(true)
+ } catch (IOException e) {
+ System.err.println("Problem with TcpExample3ServerClient networking:"); // describe what is happening
+ System.err.println("Error: " + e);
+
+ // Provide more helpful information to user if exception occurs due to running twice at one time
+ if (e instanceof java.net.BindException) {
+ System.err.println("*** Be sure to stop any other running instances of programs using this port!");
+ }
+ } finally {
+
+ // program exit: tell somebody about that
+ System.out.println("\nclient exit");
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Goericke/GoerickeServer.java b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Goericke/GoerickeServer.java
new file mode 100644
index 0000000000000000000000000000000000000000..b85a12b0e2d5d8a17eeea248b8b23c5c37e9c533
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Goericke/GoerickeServer.java
@@ -0,0 +1,102 @@
+package MV3500Cohort2020JulySeptember.homework2.Goericke;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.net.InetAddress;
+import java.net.ServerSocket;
+import java.net.Socket;
+
+/**
+ * This runable sets up a TCP/IP server for use with a client coded
+ * within MV3500 - Homework 2.
+ * @author stefan goericke */
+public class GoerickeServer {
+
+
+ private static String getLogo(){
+ String masterString = " ######### ###### # #\r\n";
+ masterString = masterString + " # # # #\r\n";
+ masterString = masterString + " # ###### # #\r\n";
+ masterString = masterString + " # # # #\r\n";
+ masterString = masterString + " # ###### #\r\n\n\n";
+ return masterString;
+ }
+
+
+ /**
+ * @param args the command line arguments
+ */
+ public static void main(String[] args) {
+ System.out.print(getLogo());
+ try {
+
+ // ServerSocket waits for a connection from a client.
+ // Notice that it is outside the loop; ServerSocket
+ // needs to be made only once.
+ System.out.println("GoerickeServer has started... "); // it helps debugging to put this on console first
+ ServerSocket serverSocket = new ServerSocket(2317);
+ OutputStream os;
+ PrintStream ps;
+ InetAddress localAddress, remoteAddress;
+ int localPort, remotePort;
+
+ // Server is up and waiting (i.e. "blocked" or paused)
+ // Loop, infinitely, waiting for client connections.
+ // Stop the program somewhere else.
+ int counter = 0;
+ while (true) {
+
+ // block until connected to a client
+ try (Socket clientConnectionSocket = serverSocket.accept()) {
+ counter++;
+ // my output stream
+ os = clientConnectionSocket.getOutputStream();
+ ps = new PrintStream(os);
+
+
+ if (counter==1){
+ ps.println("Welcome, how are you !!!"); // this gets sent back to client!
+ }
+ else if (counter%10 == 0){
+ ps.println("Still alive there ?");
+ } else {
+ ps.println("----------");
+ }
+
+ // Print some information locally about the Socket connection.
+ // This includes the port and IP numbers on both sides (the socket pair).
+ localAddress = clientConnectionSocket.getLocalAddress();
+ remoteAddress = clientConnectionSocket.getInetAddress();
+ localPort = clientConnectionSocket.getLocalPort();
+ remotePort = clientConnectionSocket.getPort();
+
+ if (( localAddress.getHostName().equals( localAddress.getHostAddress()) ||
+ remoteAddress.getHostName().equals(remoteAddress.getHostAddress())) &&
+ (counter%50==0)){
+ System.out.println("Talking to myself ..... again");
+ } else if (counter%50==0) {
+ System.out.println("Connected to ....");
+ System.out.print("(" + remoteAddress.getHostName() + "=" + remoteAddress.getHostAddress() + ", " + remotePort + " ))");
+ System.out.println();
+ System.out.println("I am ....");
+ System.out.print("(" + localAddress.getHostName() + "=" + localAddress.getHostAddress() + ", " + localPort + " ), ( ");
+ }
+
+ // connection. try w/ resources explicitly ends the connection.
+ ps.flush();
+ }
+ }
+ } catch (IOException e) {
+ System.err.println("Problem with TcpExample3Server networking: " + e);
+
+ // Provide more helpful information to user if exception occurs due to running twice at one time
+ if (e instanceof java.net.BindException) {
+ System.err.println("*** Be sure to stop any other running instances of programs using this port!");
+ }
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Goericke/Goericke_HW2.pdf b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Goericke/Goericke_HW2.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..e8226f4ef9a75b3099df8cadd40129a43186485d
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Mahan_Client.java b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Mahan_Client.java
new file mode 100644
index 0000000000000000000000000000000000000000..a3bc4bc62668dd67bd48c7cd79a86b97979e4a0a
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Mahan_Client.java
@@ -0,0 +1,81 @@
+package MV3500Cohort2020JulySeptember.homework2.Mahan;
+
+import java.io.*;
+import java.net.*;
+/**
+ *
+ * @author Bill
+ */
+public class Mahan_Client {
+
+ // IPv6 String constant for localhost address, similarly IPv4 127.0.0.1
+ public final static String LOCALHOST = "0:0:0:0:0:0:0:1";
+
+ public static void main(String[] args) {
+
+ // Local vars/fields
+ Socket socket;
+ InputStream is;
+ InputStreamReader isr;
+ BufferedReader br;
+ String serverMessage;
+ Integer count = 0;
+
+ OutputStream os;
+ PrintStream ps;
+
+
+ try {
+ while (true) {
+ System.out.println("TcpExample3Client creating socket...");
+
+ // We request an IP to connect to ("localhost") and
+ // port number at that IP (2317). This establishes
+ // a connection to that IP in the form of a Socket
+ // object; the server uses a ServerSocket to wait for
+ // connections.
+ socket = new Socket(LOCALHOST, 2317); // locohost?
+
+ // Now hook everything up (i.e. set up the streams), Java style:
+ is = socket.getInputStream();
+ isr = new InputStreamReader(is);
+ br = new BufferedReader(isr);
+
+
+ // Read a single line written by the server. We'd
+ // do things a bit differently if there were many lines to be read
+ // from the server instead of one only.
+ serverMessage = br.readLine();
+ System.out.println("==================================================");
+ System.out.println("'Knock, knock,' says the MahanClient.");
+ System.out.println("The MahanServer responds by saying: '" + serverMessage + "'");
+ System.out.println("A frustrated MahanClient responds, 'Answer your door! I have knocked "+ count +" times.");
+ count++;
+ // socket gets closed, either automatically/silently by this code (or possibly by the server)
+
+
+ // Now hook everything up (i.e. set up the streams), Java style:
+ os = socket.getOutputStream();
+ ps = new PrintStream(os);
+ ps.println("This message was produced by the MahanClient."); // this gets sent back to client!
+
+ ps.flush();
+
+
+
+ } // end while(true)
+ } catch (IOException e) {
+ System.err.println("Problem with TcpExample3ServerClient networking:"); // describe what is happening
+ System.err.println("Error: " + e);
+
+ // Provide more helpful information to user if exception occurs due to running twice at one time
+ if (e instanceof java.net.BindException) {
+ System.err.println("*** Be sure to stop any other running instances of programs using this port!");
+ }
+ } finally {
+
+ // program exit: tell somebody about that
+ System.out.println("\nclient exit");
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Mahan_Server.java b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Mahan_Server.java
new file mode 100644
index 0000000000000000000000000000000000000000..7e8ef6460bda2cb538461e6dc6d4cf61b5d6482c
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Mahan_Server.java
@@ -0,0 +1,94 @@
+package MV3500Cohort2020JulySeptember.homework2.Mahan;
+
+import java.io.*;
+import java.net.*;
+
+/**
+ *
+ * @author Bill
+ */
+public class Mahan_Server {
+
+ public static void main(String[] args) {
+ try {
+
+ // ServerSocket waits for a connection from a client.
+ // Notice that it is outside the loop; ServerSocket
+ // needs to be made only once.
+ System.out.println("TcpExample3Server has started..."); // it helps debugging to put this on console first
+
+ ServerSocket serverSocket = new ServerSocket(2317);
+ OutputStream os;
+ PrintStream ps;
+ InetAddress localAddress, remoteAddress;
+
+ InputStream is;
+ InputStreamReader isr;
+ BufferedReader br;
+ String clientMessage;
+ int localPort, remotePort;
+
+ // Server is up and waiting (i.e. "blocked" or paused)
+ // Loop, infinitely, waiting for client connections.
+ // Stop the program somewhere else.
+ while (true) {
+
+ // block until connected to a client
+ try (Socket clientConnection = serverSocket.accept()) {
+
+ // Now hook everything up (i.e. set up the streams), Java style:
+ os = clientConnection.getOutputStream();
+ ps = new PrintStream(os);
+ ps.println("Go away!"); // this gets sent back to client!
+
+ // Print some information locally about the Socket connection.
+ // This includes the port and IP numbers on both sides (the socket pair).
+ localAddress = clientConnection.getLocalAddress();
+ remoteAddress = clientConnection.getInetAddress();
+ localPort = clientConnection.getLocalPort();
+ remotePort = clientConnection.getPort();
+
+ // My socket pair connection looks like this, to localhost:
+ // Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54876 ))
+ // Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54881 ))
+
+ // Why is the first IP/port the same, while the second set has different ports?
+ System.out.println("TcpExample3Server socket pair: (( " + localAddress.toString() + ", " + localPort + " ), ( "
+ + remoteAddress.toString() + ", " + remotePort + " ))");
+
+ // Notice the use of flush() and try w/ resources. Without
+ // the try w/ resources the Socket object may stay open for
+ // a while after the client has stopped needing this
+ // connection. try w/ resources explicitly ends the connection.
+
+ // Now hook everything up (i.e. set up the streams), Java style:
+ is = clientConnection.getInputStream();
+ isr = new InputStreamReader(is);
+ br = new BufferedReader(isr);
+
+
+ // Read a single line written by the server. We'd
+ // do things a bit differently if there were many lines to be read
+ // from the server instead of one only.
+ clientMessage = br.readLine();
+ System.out.println("==================================================");
+ System.out.println("Now we're talking!");
+ System.out.println("The message the server sent was: '" + clientMessage + "'");
+// System.out.println("This was the "+ count +" connection.");
+
+
+
+ ps.flush();
+ // like it or not, you're outta here!
+ }
+ }
+ } catch (IOException e) {
+ System.err.println("Problem with TcpExample3Server networking: " + e);
+
+ // Provide more helpful information to user if exception occurs due to running twice at one time
+ if (e instanceof java.net.BindException) {
+ System.err.println("*** Be sure to stop any other running instances of programs using this port!");
+ }
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Output.PNG b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Output.PNG
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/diagram.PNG b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/diagram.PNG
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/Doku.pdf b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/Doku.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..191a0c453cae997e6a39f7cc48997ada7d31ede1
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/HW2.jpg b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/HW2.jpg
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiChatClient.java b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiChatClient.java
new file mode 100644
index 0000000000000000000000000000000000000000..4c133b53fb47cbaf0686254824b86f5534f2192e
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiChatClient.java
@@ -0,0 +1,107 @@
+package MV3500Cohort2020JulySeptember.homework2.Weissenberger;
+
+import java.io.*;
+import java.net.*;
+
+/**
+ * This client program establishes a socket connection to the chat server, hand
+ * over the connection to a thread.
+ *
+ * @author Bernd "Loki" Weissenberger
+ */
+public class LokiChatClient implements Runnable {
+
+ private Socket socket = null;
+ private Thread thread = null;
+ private DataInputStream console = null;
+ private DataOutputStream streamOut = null;
+ private LokiClientThread client = null;
+
+ /**
+ * constructor.
+ * @param serverName as named (localhost per default)
+ * @param serverPort as named (should be 2317)
+ */
+ public LokiChatClient(String serverName, int serverPort) {
+ System.out.println("***********************************************");
+ System.out.println("* Establishing connection. Please wait ... :) *");
+ System.out.println("***********************************************");
+
+ try {
+ socket = new Socket(serverName, serverPort);
+ System.out.println("I'm connected: " + socket);
+ start();
+ } catch (UnknownHostException uhe) {
+ System.out.println("Host unknown: " + uhe.getMessage());
+ } catch (IOException ioe) {
+ System.out.println("Unexpected exception (server isn't up??): " + ioe.getMessage());
+ }
+ }
+
+ public void run() {
+ while (thread != null) {
+ try {
+ streamOut.writeUTF(console.readLine());
+ streamOut.flush();
+ } catch (IOException ioe) {
+ System.out.println("Sending error: " + ioe.getMessage());
+ stop();
+ }
+ }
+ }
+
+ public void handle(String msg) {
+ if (msg.equals(".bye")) {
+ System.out.println("Good bye. Press RETURN to exit ...");
+ stop();
+ } else {
+ System.out.println(msg);
+ }
+ }
+
+ /**
+ * setup the streams and (if possible) the Thread
+ * @throws IOException
+ */
+ public void start() throws IOException {
+ console = new DataInputStream(System.in);
+ streamOut = new DataOutputStream(socket.getOutputStream());
+ if (thread == null) {
+ client = new LokiClientThread(this, socket);
+ thread = new Thread(this);
+ thread.start();
+ }
+ }
+
+ /**
+ * stops the Thread
+ */
+ public void stop() {
+ if (thread != null) { //thread.stop();
+ thread = null;
+ }
+ try {
+ if (console != null) {
+ console.close();
+ }
+ if (streamOut != null) {
+ streamOut.close();
+ }
+ if (socket != null) {
+ socket.close();
+ }
+ } catch (IOException ioe) {
+ System.out.println("Error closing ...");
+ }
+ client.close();
+ }
+
+ /**
+ * main method with fix IP and Port
+ * @param args
+ */
+ public static void main(String args[]) {
+ LokiChatClient client = null;
+ client = new LokiChatClient("127.0.0.1", 2317);
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiChatServer.java b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiChatServer.java
new file mode 100644
index 0000000000000000000000000000000000000000..393d40bd9285d5cea5d6873d43e3d339bbf50ec5
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiChatServer.java
@@ -0,0 +1,149 @@
+package MV3500Cohort2020JulySeptember.homework2.Weissenberger;
+
+import java.io.*;
+import java.net.*;
+
+/**
+ * A server example that creates a new thread to handle multiple
+ * connections one after another, running in parallel.
+ *
+ * @author Bernd Weissenberger
+ */
+public class LokiChatServer implements Runnable {
+
+ private LokiServerThread clients[] = new LokiServerThread[50];
+ private ServerSocket server = null;
+ private Thread thread = null;
+ private int clientCount = 0;
+
+ /**
+ * constructor
+ * @param port
+ */
+ public LokiChatServer(int port) {
+ try {
+ System.out.println("Binding to port " + port + ", please wait ...");
+ server = new ServerSocket(port);
+ System.out.println("Server started: " + server);
+ start();
+ } catch (IOException ioe) {
+ System.out.println("Can not bind to port " + port + ": " + ioe.getMessage());
+ }
+ }
+
+ /**
+ * start a new thread
+ */
+ @Override
+ public void run() {
+ while (thread != null) {
+ try {
+ System.out.println("Waiting for a client ...");
+ addThread(server.accept());
+ } catch (IOException ioe) {
+ System.out.println("Server accept error: " + ioe);
+ stop();
+ }
+ }
+ }
+ public void start() {
+ if (thread == null) {
+ thread = new Thread(this);
+ thread.start();
+ }
+ }
+
+ /**
+ * kill the thread
+ */
+ public void stop() {
+ if (thread != null) {
+ //thread.stop();
+ thread = null;
+ }
+ }
+
+ /**
+ * get the client by ID
+ * @param ID
+ * @return
+ */
+ private int findClient(int ID) {
+ for (int i = 0; i < clientCount; i++) {
+ if (clients[i].getID() == ID) {
+ return i;
+ }
+ }
+ return -1;
+ }
+
+ /**
+ * sending message to all clients
+ * @param ID
+ * @param input
+ */
+ public synchronized void handle(int ID, String input) {
+ if (input.equals(".bye")) {
+ clients[findClient(ID)].send(".bye");
+ remove(ID);
+ } else {
+ for (int i = 0; i < clientCount; i++) {
+ clients[i].send(ID + " says: " + input);
+ }
+ }
+ }
+
+ /**
+ * remove a quit client from list
+ * @param ID
+ */
+ public synchronized void remove(int ID) {
+ int pos = findClient(ID);
+ if (pos >= 0) {
+ LokiServerThread toTerminate = clients[pos];
+ System.out.println("Removing client thread " + ID + " at " + pos);
+ if (pos < clientCount - 1) {
+ for (int i = pos + 1; i < clientCount; i++) {
+ clients[i - 1] = clients[i];
+ }
+ }
+ clientCount--;
+ try {
+ toTerminate.close();
+ } catch (IOException ioe) {
+ System.out.println("Error closing thread: " + ioe);
+ }
+ //toTerminate.stop();
+ }
+ }
+
+ /**
+ * add a thread to list
+ * @param socket
+ */
+ private void addThread(Socket socket) {
+ if (clientCount < clients.length) {
+ System.out.println("Client accepted: " + socket);
+ clients[clientCount] = new LokiServerThread(this, socket);
+ try {
+ clients[clientCount].open();
+ clients[clientCount].start();
+ clientCount++;
+ } catch (IOException ioe) {
+ System.out.println("Error opening thread: " + ioe);
+ }
+ } else {
+ System.out.println("Client refused: maximum " + clients.length + " reached.");
+ }
+ }
+
+ /**
+ * the main for this class. Just starts a new server listening at port 2317
+ * @param args
+ */
+ public static void main(String args[]) {
+ LokiChatServer server = null;
+ server = new LokiChatServer(2317);
+ }
+
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiClientThread.java b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiClientThread.java
new file mode 100644
index 0000000000000000000000000000000000000000..7c17ba9e045f2f5f06eb07092fbd24f4584ac414
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiClientThread.java
@@ -0,0 +1,67 @@
+package MV3500Cohort2020JulySeptember.homework2.Weissenberger;
+
+import java.io.*;
+import java.net.*;
+
+/**
+ * A program that handles all logic associated with one socket connection by
+ * running in a thread of its own. This is the client portion.
+ *
+ * @author Bernd Weisenberger
+ */
+public class LokiClientThread extends Thread {
+
+ private Socket socket = null;
+ private LokiChatClient client = null;
+ private DataInputStream streamIn = null;
+
+ /**
+ * constructor
+ * @param client
+ * @param socket
+ */
+ public LokiClientThread(LokiChatClient client, Socket socket) {
+ this.client = client;
+ this.socket = socket;
+ this.open();
+ this.start();
+ }
+
+ /**
+ * initialize the stream
+ */
+ public void open() {
+ try {
+ streamIn = new DataInputStream(socket.getInputStream());
+ } catch (IOException ioe) {
+ System.out.println("Error getting input stream: " + ioe);
+ }
+ }
+
+ /**
+ * closes the stream
+ */
+ public void close() {
+ try {
+ if (streamIn != null) {
+ streamIn.close();
+ }
+ } catch (IOException ioe) {
+ System.out.println("Error closing input stream: " + ioe);
+ }
+ }
+
+ /**
+ * uses the handle() from Client to react (send or quit)
+ */
+ public void run() {
+ while (true) {
+ try {
+ client.handle(streamIn.readUTF());
+ } catch (IOException ioe) {
+ System.out.println("Listening error: " + ioe.getMessage());
+ client.stop();
+ }
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiServerThread.java b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiServerThread.java
new file mode 100644
index 0000000000000000000000000000000000000000..a8dfc011f097413cb779d4dd88927c7801f55da0
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiServerThread.java
@@ -0,0 +1,97 @@
+package MV3500Cohort2020JulySeptember.homework2.Weissenberger;
+
+import java.io.*;
+import java.net.*;
+
+/**
+ * A program that handles all logic associated with one socket connection
+ * by running in a thread of its own. This is the server
+ * portion
+ *
+ * @author Bernd Weissenberger
+ */
+public class LokiServerThread extends Thread {
+
+ // as named
+ private LokiChatServer server = null;
+ private Socket socket = null;
+ private int ID = -1;
+ private DataInputStream streamIn = null;
+ private DataOutputStream streamOut = null;
+
+ /**
+ * constructor
+ * @param server instance of the server
+ * @param socket ...and the socket
+ */
+ public LokiServerThread(LokiChatServer server, Socket socket) {
+ super();
+ this.server = server;
+ this.socket = socket;
+ this.ID = socket.getPort();
+ }
+
+ /**
+ * send the messages
+ * @param msg
+ */
+ public void send(String msg) {
+ try {
+ streamOut.writeUTF(msg);
+ streamOut.flush();
+ } catch (IOException ioe) {
+ System.out.println(ID + " ERROR sending: " + ioe.getMessage());
+ server.remove(ID);
+ }
+ }
+
+ /**
+ * simple getter
+ * @return
+ */
+ public int getID() {
+ return ID;
+ }
+
+ /**
+ * read he input using the handler method
+ */
+ @Override
+ public void run() {
+ System.out.println("Server Thread " + ID + " running.");
+ while (true) {
+ try {
+ server.handle(ID, streamIn.readUTF());
+ } catch (IOException ioe) {
+ System.out.println(ID + " ERROR reading: " + ioe.getMessage());
+ server.remove(ID);
+ //stop();
+ }
+ }
+ }
+
+ /**
+ * open all needed streams
+ * @throws IOException
+ */
+ public void open() throws IOException {
+ streamIn = new DataInputStream(new BufferedInputStream(socket.getInputStream()));
+ streamOut = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream()));
+ }
+
+ /**
+ * close socket and streams
+ * @throws IOException
+ */
+ public void close() throws IOException {
+ if (socket != null) {
+ socket.close();
+ }
+ if (streamIn != null) {
+ streamIn.close();
+ }
+ if (streamOut != null) {
+ streamOut.close();
+ }
+ }
+}