How can I make this use multiple threads as clients - who all perform a task each within the switch statement? I would also like the threads to perform these tasks and once they have carried them out they stop (currently these tasks are performed from user input).
There are 3 classes the server, client and developer database - which holds a constructor for the 'developer' objects within an ArrayList in the server. This array list is providing the information which is being passed to the clients upon their specific requests.
Here is my code: Client:
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.*;
public class QuoteOfTheDayClient_2 {
static String devName;
static String devSkill;
static Boolean devHire;
static Socket echoSocket = null; // holds the Socket object
static Scanner fromServer = null; // input stream from remote host
static Scanner fromServer1 = null; // input stream from remote host
static PrintWriter toServer = null; // output stream to remote host
static PrintWriter toServer1 = null; // output stream to remote host
static Scanner stdIn = new Scanner(System.in);
static String remoteServer = "localhost"; // are you 'local'?!
//String remoteServer = "193.61.190.96"; // remote host is not 'local'!
static int port;
static String reply;// holds reply from remote host
public static void searchForSkill(String skill) {
toServer.println(1);
String quoteNum = "php"; //Search for a specific coding language -
Specific to the entered parameters
System.out.println("Searching for Skill: " + skill + " in Developer
Database");
toServer.println(quoteNum);
while (!(reply = fromServer.nextLine()).isEmpty()) {
// System.out.println(reply1);
System.out.println(reply);// print reply to screen
}
fromServer.nextLine(); // Consume the newline
System.out.println();
}
public static void addDeveloper(String name, String skill,boolean
hire)
{
toServer.println(2);
System.out.println("Add Developer to system ");
stdIn.nextLine(); // flush newline
String quoteString = name;//stdIn.nextLine();
String quoteString1 = skill;//stdIn.nextLine();
boolean quoteString2 = hire;//stdIn.nextLine();
toServer.println(quoteString);
toServer.println(quoteString1);
toServer.println(quoteString2);
fromServer.next();
System.out.println("\nDeveloper entered: " + quoteString + "\n");
while (!(reply = fromServer.nextLine()).isEmpty()) {
// System.out.println(reply1);
System.out.println(reply);// print reply to screen
}
}
public static void checkAvailability(String developerName) {
try {
toServer.println(3);
System.out.println("Send Developer Name to Find Availability:
");
String quoteDel = developerName;
toServer.println(quoteDel);
while (!(reply = fromServer.nextLine()).isEmpty()) {
// System.out.println(reply1);
System.out.println(reply);// print reply to screen
}
} catch (NoSuchElementException e) {
}
}
public static void hireDeveloper(String name) {
toServer.println(4);
String quoteNum = name; //Search for a specific coding language -
Specific to the entered parameters
System.out.println("Searching for: " + name + " in Developer
Database");
toServer.println(quoteNum);
while (!(reply = fromServer.nextLine()).isEmpty()) {
// System.out.println(reply1);
System.out.println(reply);// print reply to screen
}
fromServer.nextLine(); // Consume the newline
System.out.println();
}
public static void printAllDevelopers(){
toServer.println(5);
while (!(reply = fromServer.nextLine()).isEmpty()) {
// System.out.println(reply1);
System.out.println(reply);// print reply to screen
}
fromServer.nextLine(); // Consume the newline
System.out.println();
}
public static void clientMenu(){
try {
port = 4444; // 17 for localhost
echoSocket = new Socket(remoteServer, port);
fromServer = new Scanner(echoSocket.getInputStream());
fromServer1 = new Scanner(echoSocket.getInputStream());
toServer = new PrintWriter(echoSocket.getOutputStream(), true);
toServer1 = new PrintWriter(echoSocket.getOutputStream(),
true);
OutputStream os = echoSocket.getOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(os);
} catch (Exception e) {
System.err.println("Exception: " + e);
System.exit(1);
} // try-catch
String reply;// holds reply from remote host
int command;
String reply1;
String devName="David Blaine";
String devSkill="Java";
System.out.println("Enter command: 1:Search Skill 2:Add
Developer 3:Search Availability 4:Hire Developer 5:Show all
Developers 6:Exit");
command = 0;
command = command+1;
// while (command != 0) {
for(int i=1;i<6;i++) {
command=i;
switch (i) {
case 1: {
// get quote
searchForSkill("PHP");
break;
}
case 2: {
// add quote
addDeveloper("David Blaine", "Java", true);
break;
}
case 3: {
// delete quote
checkAvailability("David Ferguson");
break;
}
case 4: {
hireDeveloper("Thompson");
break;
}
case 5: {
printAllDevelopers();
}
case 6: {
System.exit(6);
}
default:
System.out.println("*** Command not recognised ***");
break;
}
System.out.println("Enter command: 1:Search Skill 2:Add Developer
3:Search Availability 4:Hire Developer 5:Show all Developers
6:Exit");
command = stdIn.nextInt();
//}
}
toServer.println(command);
try {
echoSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
fromServer.close();
toServer.close();
stdIn.close();
}
public static void main(String[] args) throws IOException {
clientMenu();
} // main
} // EchoClient
Server code:
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.PrintWriter;
import java.lang.reflect.Array;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.InputMismatchException;
import java.util.List;
import java.util.Scanner;
public class QuoteOfTheDayServer_2 {
private static DeveloperDatabase[] developerList = new
DeveloperDatabase[7];
static DeveloperDatabase temp []=new DeveloperDatabase[7];
static String userAddDevName;
static String userAddCodeSkills;
static Boolean userAddHireAvailability;
static int command;
static List<DeveloperDatabase> list = new
ArrayList<DeveloperDatabase>(){
{
add(new DeveloperDatabase(1,"David Ferguson", "Java",
true));
add(new DeveloperDatabase(2,"Grant Thompson", "Java",
true));
add(new DeveloperDatabase(3,"Craig Jackson", "C++", true));
add(new DeveloperDatabase(4,"Kevin James","C++", true));
add(new DeveloperDatabase(5,"Greg Troupe", "Python",
true));
add(new DeveloperDatabase(6,"James Smith", "Python",
true));
add(new DeveloperDatabase(7,"Jamie Richie", "PHP", true));
add(new DeveloperDatabase(8,"Rory McGrattan", "PHP",
false));
}
};
public static String printJava(){
String message="";
for (int i=0;i<2;i++){
message +=list.get(i).toString();
message+=" \n";
}
return message;
}
public static String printC(){
String message="";
for (int i=2;i<4;i++){
message +=list.get(i).toString();
message+=" \n";
}
return message;
}
public static String printPy(){
String message="";
for (int i=4;i<6;i++){
message +=list.get(i).toString();
message+=" \n";
}
return message;
}
public static String printPHP(){
String message="";
for (int i=6;i<8;i++){
message +=list.get(i).toString();
message+=" \n";
}
return message;
}
public static void addDeveloper(String name,String
codeSkill,Boolean hire){
userAddDevName=name;
userAddCodeSkills = codeSkill;
userAddHireAvailability = hire;
System.out.println("*********Adding Developer***********");
System.out.println(userAddDevName+ " has been added to the
system");
list.add(new DeveloperDatabase(9,
userAddDevName,userAddCodeSkills, userAddHireAvailability));
System.out.println(list.get(8));
}//addDeveloper
public static String checkAvail(String clientMessage){
String message="";
for (int i=0;i<list.size();i++){
if
(clientMessage.equalsIgnoreCase(list.get(i).getDeveloperName())) {
message+= list.get(i).toString();
message+="\n";
}
} return message;
}
public static String printAllDevelopers(){
String message="";
for (int i=0;i<8;i++){
message +=list.get(i).toString();
message+=" \n";
}
return message;
}
public static void main(String[] args) throws IOException {
// Wrap the standard System.in stream with a Scanner so that
Scanner stdIn = new Scanner(System.in);
Scanner fromClient = null;
PrintWriter toClient = null;
PrintWriter toClient1=null;
int pNum = 4444;
ServerSocket sSocket = null;
Socket cSocket = null;
try {
sSocket = new ServerSocket(pNum);
} catch (IOException e) {
System.out.println("Couldn't listen on port: " + pNum + ";
" +
e);
System.exit(1);
}
// Continuously wait for client; accept them; and send a quote
to
them.
while (true) {
try {
System.out.println("Waiting for client ....");
// Blocking 'accept' i.e. wait for a client
cSocket = sSocket.accept();
System.out.println("Client connected from: " +
cSocket.getInetAddress());
// Set up the output stream for the server, i.e. a
PrintWriter stream
toClient = new PrintWriter(cSocket.getOutputStream(),
true);
toClient1 = new PrintWriter(cSocket.getOutputStream(),
true);
ObjectInputStream ois = new
ObjectInputStream(cSocket.getInputStream());
fromClient = new Scanner(cSocket.getInputStream());
try {
command = fromClient.nextInt();
//fromClient.nextLine();
} catch (InputMismatchException e){
System.out.print("Your selection can only be an
integer!");
}
System.out.println("Received command: " + command + "
from
client at " + cSocket.getInetAddress());
while (command != 0) {
switch (command) {
case 1: // get skills
{
System.out.println("GET skill");
fromClient.nextLine();
String quoteNum =
fromClient.nextLine();//receive from client
if (quoteNum.equalsIgnoreCase("Java")) {
toClient1.println(printJava());
} else if
(quoteNum.equalsIgnoreCase("C++")) {
toClient1.println(printC());
} else if
(quoteNum.equalsIgnoreCase("Python"))
{
toClient.println(printPy());
} else if
(quoteNum.equalsIgnoreCase("PHP")) {
toClient.println(printPHP());
}
else {
toClient.println("No developer with
those
skills found");
}
//
toClient.println(list.equals("Java"));//number -1 for array (0) to
client print
System.out.println("Pushed Developer
number: "
+ quoteNum + " to client at " + cSocket.getInetAddress());
//toClient.println(quotes[quoteNum]); //
return
quote //if "java' { get(0) get(1)
break;
}
case 2: // add quote
{
System.out.println("ADD Developer to
System");
fromClient.nextLine(); // flush newline
String quote = fromClient.next();
fromClient.nextLine();
String quote1 = fromClient.next();
fromClient.nextLine();
boolean quote2 = fromClient.nextBoolean();
toClient.println("The\t*************Developer
has been Added to the Developer Database********");
list.add(new DeveloperDatabase(9, quote,
quote1, quote2));
toClient.println(list.get(8).toString());
//addDeveloper(quote,quote1,quote2);
System.out.println(list.get(8));
//System.out.println("Received quote from
client:" + quote);
quote = quote + "\n\n";
//list.add((quote);
System.out.println("Added Developer: " +
quote);
break;
}
case 3: // Check if Developer is available
{
System.out.println("Check if developer is
Available\n");
fromClient.nextLine();
String quoteNum = fromClient.nextLine();
System.out.println("Checking availability
for:
" + quoteNum);
if (quoteNum.equalsIgnoreCase("Rory
McGrattan")) {
toClient.println("The Developer is not
available for hire");
} else {
toClient.println("The Developer is
available for hire");
}break;
}case 4: {
System.out.println("Hire A Developer");
String quoteNum =fromClient.next();
System.out.println("Client wants to hire:
"+quoteNum);
String message = quoteNum;
for(int i=0;i<list.size();i++){
if
(quoteNum.equalsIgnoreCase(list.get(i).getDeveloperName())){
list.get(i).hireDeveloper();
}//if
}//if
//System.out.println(message);
toClient.println("******* You have Hired:
"+
message+" ********");
break;
}
case 5: {// Print all Developers
String message="";
for (int i=0;i<8;i++){
message +=list.get(i).toString();
message+=" \n";
}
toClient.println(message);
}
default:
break;
}
try {
//command = fromClient.nextInt();
}catch(InputMismatchException e){
}
System.out.println("Received command: " + command +
"from client at " + cSocket.getInetAddress());
}
// Close all streams
toClient.close();
cSocket.close();
fromClient.close();
stdIn.close();
} catch (IOException e) {
System.out.println("Accept failed: " + pNum + "; " +
e);
System.exit(1);
}
}
} // main
} // QuoteOfTheDayServer_2
DeveloperDatabase code:
public class DeveloperDatabase {
private int id;
private String developerName;
private String codingLanguage;
private boolean freeForHire;
public DeveloperDatabase(){
}
public DeveloperDatabase(int id,String name,String codeSkills,boolean
hire){
this.id = id;
this.developerName = name;
this.codingLanguage=codeSkills;
this.freeForHire=hire;
}
public String toString() {
String message = "\tName: " +developerName;
message += "\n" + "\tCoding Language: "+ codingLanguage+"\n";
if (freeForHire== true) {
message += "\tThe developer is Available! for Hire!\n";
} else {
message += "\tThe developer is not Available for Hire!\n";
}
return message;
}//toString
public boolean getFreeForHire() {
if (freeForHire==true){
System.out.println("The Developer is free to hire!");
}else{
System.out.println("The Developer is not free to hire!");
}
return freeForHire;
}
public String getCodingLanguage() {
return codingLanguage;
}
public void hireDeveloper(){
if (freeForHire==true)
freeForHire = false;
System.out.println(developerName +" is Hired!");
}
public String getDeveloperName() {
return developerName;
}
public static void main(String[] args) {
}//main
}//class
