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Server1.java
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Server1.java
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package DCRS;
import java.io.BufferedWriter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import org.omg.CORBA.ORB;
import org.omg.CosNaming.NameComponent;
import org.omg.CosNaming.NamingContextExt;
import org.omg.CosNaming.NamingContextExtHelper;
import org.omg.PortableServer.POA;
import org.omg.PortableServer.POAHelper;
class student_comp{
static List<String> list11 = new ArrayList<>();
static List<String> list12 = new ArrayList<>();
static List<String> list13 = new ArrayList<>();
static HashMap<String,List<String>> student_comp_fall = new HashMap<>();
static HashMap<String,List<String>> student_comp_winter = new HashMap<>();
static HashMap<String,List<String>> student_comp_summer = new HashMap<>();
static HashMap<String, HashMap<String,List<String>>> std_comp = new HashMap<>();
static List<String> students_co = new ArrayList<>();
static List<String> advisor_co = new ArrayList<>();
public student_comp(){
list11.add("COMPS001");
list11.add("COMPS004");
student_comp_fall.put("COMP6231",list11);
std_comp.put("Fall", student_comp_fall);
list12.add("COMPS002");
student_comp_winter.put("COMP6281", list12);
std_comp.put("Winter", student_comp_winter);
list13.add("COMPS003");
student_comp_summer.put("COMP6461", list13);
std_comp.put("Summer", student_comp_summer);
students_co.add("COMPS001");
students_co.add("COMPS002");
students_co.add("COMPS003");
advisor_co.add("COMPA1");
}
}
class CourseDetail_comp implements Serializable{
private static final long serialVersionUID = 1L;
static int capacity;
static HashMap<String,Integer> comp_fall = new HashMap<>();
static HashMap<String,Integer> comp_winter = new HashMap<>();
static HashMap<String,Integer> comp_summer = new HashMap<>();
static HashMap<String, HashMap<String,Integer>> hash_comp = new HashMap<>();
public CourseDetail_comp(){
capacity = 3;
comp_fall.put("COMP6231",capacity);
hash_comp.put("Fall", comp_fall);
comp_winter.put("COMP6281",capacity);
hash_comp.put("Winter", comp_winter);
comp_summer.put("COMP6461",capacity);
hash_comp.put("Summer", comp_summer);
}
static void set(int c){
capacity = c;
}
}
class Check_comp{
CourseDetail_comp cdc = new CourseDetail_comp();
student_comp sdc = new student_comp();
Set s;
public synchronized Set checkReply(String sem,String courseID,String sid,String msg){
if(msg.equals("checkcourse")) {
boolean contains = false;
if(CourseDetail_comp.comp_fall.containsKey(courseID))
contains = true;
if(CourseDetail_comp.comp_winter.containsKey(courseID))
contains = true;
if(CourseDetail_comp.comp_summer.containsKey(courseID))
contains = true;
if(contains)
return new Set(sem,courseID,sid,"yes");
else
return new Set(sem,courseID,sid,"no");
}
if(msg.equals("checkOld")) {
String semester = "";
boolean contains = false;
System.out.println(student_comp.std_comp);
System.out.println(student_comp.student_comp_fall.containsKey(courseID));
if(student_comp.student_comp_fall.containsKey(courseID))
semester = "Fall";
if(student_comp.student_comp_winter.containsKey(courseID))
semester = "Winter";
if(student_comp.student_comp_summer.containsKey(courseID))
semester = "Summer";
if(semester.equals("Fall")) {
// contains = student_comp.list11.contains(sid);
for(Map.Entry<String, List<String>>map : student_comp.student_comp_fall.entrySet()) {
List<String> ls = map.getValue();
if(ls.contains(sid))
contains = true;
}
}
if(semester.equals("Winter")) {
for(Map.Entry<String, List<String>>map : student_comp.student_comp_winter.entrySet()) {
List<String> ls = map.getValue();
if(ls.contains(sid))
contains = true;
}
}
if(semester.equals("Summer")) {
for(Map.Entry<String, List<String>>map : student_comp.student_comp_summer.entrySet()) {
List<String> ls = map.getValue();
if(ls.contains(sid))
contains = true;
}
}
System.out.println("contains:"+contains);
if(contains) return new Set(sem,courseID,sid,semester);
else return new Set(sem,courseID,sid,"no");
}
if(msg.equals("schedule")){
String value ="a";
String st = new String("1");
String st1 = new String("2");
String st2 = new String("3");
String[] str_array2 = {"ASC","SAD","ASD"};
for(Map.Entry<String, HashMap<String, List<String>>> entry : student_comp.std_comp.entrySet()){
HashMap<String, List<String>> hash = entry.getValue();
for(Map.Entry<String, List<String>> entry1 : hash.entrySet()){
List<String> str = entry1.getValue();
if(str.contains(sid)){
System.out.println("list"+str);
if(entry.getKey().equals("Fall")){
if(st.equals("1"))
st = "f"+entry1.getKey()+",";
else
st = st + "f"+entry1.getKey()+",";
str_array2[0] = entry.getKey();
}
if(entry.getKey().equals("Winter")){
if(st1.equals("2"))
st1 = "w"+entry1.getKey()+",";
else
st1 = st1 + "w" +entry1.getKey()+",";
str_array2[1] = entry.getKey();
}
if(entry.getKey().equals("Summer")){
if(st2.equals("s"))
st2 = "s"+entry1.getKey()+",";
else
st2 += "s"+entry1.getKey()+",";
str_array2[3] = entry.getKey();
}
}
}
}
if(str_array2[0].equals("Fall")){
st = str_array2[0].toString()+","+st;
}
if(str_array2[1].equals("Winter")){
st1 = str_array2[1].toString()+","+st1;
}
if(str_array2[2].equals("Summer"))
st2 = str_array2[2].toString()+","+st2;
if(!st.equals("1")){
if(value.equals("a"))
value = st;
else
value+=st;
}
if(!st1.equals("2")){
if(value.equals("a"))
value = st1;
else
value+=st1;
}
if(!st2.equals("3")){
if(value.equals("a"))
value = st2;
else
value+=st2;
}
if(value.equals("a"))
s = new Set(sem, courseID, sid, "empty");
else{
System.out.println(value);
s = new Set(sem, courseID, sid, value);
}
return s;
}
if(msg.equals("drop")){
if(student_comp.student_comp_fall.containsKey(courseID)){
List<String> lst = student_comp.student_comp_fall.get(courseID);
lst.remove(sid);
student_comp.student_comp_fall.replace(courseID, student_comp.list11, lst);
Integer i = CourseDetail_comp.comp_fall.get(courseID);
CourseDetail_comp.comp_fall.replace(courseID, i, (i+1));
return new Set(sem, courseID, sid, "dropped");
}
if(student_comp.student_comp_winter.containsKey(courseID)){
List<String> lst = student_comp.student_comp_winter.get(courseID);
lst.remove(sid);
student_comp.student_comp_winter.replace(courseID, student_comp.list12, lst);
Integer i = CourseDetail_comp.comp_fall.get(courseID);
CourseDetail_comp.comp_winter.replace(courseID, i, (i+1));
return new Set(sem, courseID, sid, "dropped");
}
if(student_comp.student_comp_summer.containsKey(courseID)){
List<String> lst = student_comp.student_comp_summer.get(courseID);
lst.remove(sid);
student_comp.student_comp_summer.replace(courseID, student_comp.list13, lst);
Integer i = CourseDetail_comp.comp_summer.get(courseID);
CourseDetail_comp.comp_summer.replace(courseID, i, (i+1));
return new Set(sem, courseID, sid, "dropped");
}
return new Set(sem, courseID, sid, "notexists");
}
if(msg.equals("list")){
StringBuilder builder = new StringBuilder();
ArrayList<String> ar = new ArrayList<>();
if(sem.equals("Fall")){
for(Map.Entry<String, Integer> map : CourseDetail_comp.comp_fall.entrySet()){
String str = map.getKey() + " " + map.getValue()+ ",";
ar.add(str);
}
}
if(sem.equals("Winter")){
for(Map.Entry<String, Integer> map : CourseDetail_comp.comp_winter.entrySet()){
String str = map.getKey() + " " + map.getValue()+ ",";
ar.add(str);
}
}
if(sem.equals("Summer")){
for(Map.Entry<String, Integer> map : CourseDetail_comp.comp_summer.entrySet()){
String str = map.getKey() + " " + map.getValue()+ ",";
ar.add(str);
}
}
if(ar.isEmpty())
return new Set(sem, "course", "sid", "empty");
for(String s : ar){
builder.append(s);
}
s = new Set(sem, "course", "sid", builder.toString());
return s;
}
if(msg.equals("seats")){
int i = 0;
int j = 0;
if(sem.equals("Fall")){
for(Map.Entry<String, List<String>> map1:student_comp.student_comp_fall.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid))
j++;
}
}
if(sem.equals("Winter")){
for(Map.Entry<String, List<String>> map1:student_comp.student_comp_winter.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid))
j++;
}
}
if(sem.equals("Summer")){
for(Map.Entry<String, List<String>> map1:student_comp.student_comp_summer.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid))
j++;
}
}
for(Map.Entry<String, List<String>> map1:student_comp.student_comp_fall.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid))
i++;
}
for(Map.Entry<String, List<String>> map1:student_comp.student_comp_winter.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid))
i++;
}
for(Map.Entry<String, List<String>> map1:student_comp.student_comp_summer.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid))
i++;
}
s = new Set(sem, courseID, sid, Integer.toString(i)+","+Integer.toString(j));
return s;
}
if(msg.equals("enroll")){
int i = 0;
int j = 0;
List<String> ls = new ArrayList<>();
HashMap<String, Integer> hm = CourseDetail_comp.hash_comp.get(sem);
if(!hm.containsKey(courseID))
return new Set(sem, courseID, sid, "notexists");
j = hm.get(courseID);
System.out.println("j"+j);
if(j == 0){
return new Set(sem, courseID, sid, "full");
}
if(courseID.substring(0,4).equals("COMP")){
if(student_comp.student_comp_fall.get(courseID) != null){
List<String> lst = student_comp.student_comp_fall.get(courseID);
if(lst.contains(sid)){
return new Set(sem, courseID, sid, "taken");
}
}
if(student_comp.student_comp_winter.get(courseID) != null){
List<String> lst = student_comp.student_comp_winter.get(courseID);
if(lst.contains(sid)){
return new Set(sem, courseID, sid, "taken");
}
}
if(student_comp.student_comp_summer.get(courseID) != null){
List<String> lst = student_comp.student_comp_summer.get(courseID);
if(lst.contains(sid)){
return new Set(sem, courseID, sid, "taken");
}
}
}
for(Map.Entry<String, HashMap<String,List<String>>> map: student_comp.std_comp.entrySet()){
HashMap<String, List<String>> hash = map.getValue();
for(Map.Entry<String, List<String>> map1:hash.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid))
i++;
}
}
for(Map.Entry<String, HashMap<String,List<String>>> map: student_comp.std_comp.entrySet()){
HashMap<String, List<String>> hash = map.getValue();
for(Map.Entry<String, List<String>> map1:hash.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid)){
if(map1.getKey().equals(courseID))
return new Set(sem, courseID, sid, "taken");
}
}
}
System.out.println("i :"+i);
if(i == 2){
return new Set(sem, courseID, sid, "cant");
}
if(i < 2){
if(courseID.substring(0,4).equals("COMP")){
if(sem.equals("Fall")){
if(!student_comp.student_comp_fall.containsKey(courseID) && CourseDetail_comp.comp_fall.containsKey(courseID))
{
ls.add(sid);
student_comp.student_comp_fall.put(courseID, ls);
}
else{
ls = student_comp.student_comp_fall.get(courseID);
ls.add(sid);
student_comp.student_comp_fall.replace(courseID, student_comp.list11, ls);
}
CourseDetail_comp.comp_fall.replace(courseID, j, j-1);
return new Set(sem, courseID, sid, "enroll");
}
if(sem.equals("Winter")){
if(!student_comp.student_comp_winter.containsKey(courseID) && CourseDetail_comp.comp_winter.containsKey(courseID))
{
ls.add(sid);
student_comp.student_comp_winter.put(courseID, ls);
}
else{
ls = student_comp.student_comp_winter.get(courseID);
ls.add(sid);
student_comp.student_comp_winter.replace(courseID, student_comp.list12, ls);
}
CourseDetail_comp.comp_fall.replace(courseID, j, j-1);
return new Set(sem, courseID, sid, "enroll");
}
if(sem.equals("Summer")){
if(student_comp.student_comp_summer.containsValue(sid)){
return new Set(sem, courseID, sid, "taken");
}
else{
student_comp.list13.add(sid);
CourseDetail_comp.comp_summer.replace(courseID, (j-1));
student_comp.student_comp_summer.put(courseID, student_comp.list13);
return new Set(sem, courseID, sid, "enroll");
}
}
}
}
}
return new Set(sem, courseID, sid, "na");
}
}
class Send implements Runnable{
Thread t;
int port;
String message;
String sem;
String courseID;
String sid;
byte[] buffer1;
byte[] buffer2;
StudentDetails sd;
// Set s = new Set();
public Send(int p,String sem1,String courseID1,String sid1,String msg) {
port = p;
this.message = msg;
sem = sem1;
courseID = courseID1;
sid = sid1;
t = new Thread(this);
t.start();
}
@Override
public void run() {
DatagramSocket socket = null;
Set s = new Set(sem,courseID,sid,message);
try{
buffer1 = new byte[1000];
socket = new DatagramSocket();
InetAddress host = InetAddress.getByName("localhost");
ByteArrayOutputStream outstream = new ByteArrayOutputStream();
ObjectOutputStream outobj = new ObjectOutputStream(outstream);
outobj.writeObject(s);
buffer1 = outstream.toByteArray();
outobj.flush();
DatagramPacket packet = new DatagramPacket(buffer1, buffer1.length, host, port);
socket.send(packet);
buffer2 = new byte[1000];
// reply from servers
DatagramPacket reply = new DatagramPacket(buffer2, buffer2.length);
socket.receive(reply);
ByteArrayInputStream in = new ByteArrayInputStream(buffer2);
ObjectInputStream objin = new ObjectInputStream(in);
Set s1 = (Set)objin.readObject();
setMsg(s1.message);
System.out.println(Thread.activeCount());
System.out.println("send"+s1.message);
}
catch(SocketException e){}
catch(IOException e){}
catch (ClassNotFoundException e) {
}
finally {
if(socket != null) socket.close();
}
}
public void setMsg(String msg){
this.message = msg;
}
public String getMsg(){
return message;
}
}
class Receive implements Runnable{
Thread t;
StudentDetails sd;
Check_comp c;
public Receive() {
c = new Check_comp();
t = new Thread(this);
t.start();
}
@Override
public void run() {
DatagramSocket socket = null;
try{
socket = new DatagramSocket(3965);
byte[] buffer;
System.out.println("server 1 is running on port 3965...");
while(true){
buffer = new byte[1000];
DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
socket.receive(packet);
//reply back to client
ByteArrayInputStream in = new ByteArrayInputStream(buffer);
ObjectInputStream objin = new ObjectInputStream(in);
try {
Set s1 = (Set)objin.readObject();
s1 = c.checkReply(s1.getSem(),s1.getCourseID(),s1.getId(),s1.getMessage());
ByteArrayOutputStream ob = new ByteArrayOutputStream();
ObjectOutputStream oo = new ObjectOutputStream(ob);
oo.writeObject(s1);
buffer = ob.toByteArray();
}
catch (Exception e) {
}
DatagramPacket reply = new DatagramPacket(buffer, buffer.length, packet.getAddress(), packet.getPort());
socket.send(reply);
}
}
catch(SocketException e){}
catch (IOException e) { }
finally {
if(socket != null) socket.close();
}
}
}
public class Server1 {
static BufferedWriter bw = null;
static FileWriter fw = null;
static CourseDetail_comp cdc;
static StudentDetails sdc;
static String msg;
String date;
void LogFile(String advisor,String student,String date,String arguments,String method,String ans,String status) {
try {
fw = new FileWriter("./CompServer/COMPServer.txt",true);
bw = new BufferedWriter(fw);
bw.write(date+", ");
bw.write(student+", ");
bw.write(method+", ");
bw.write(arguments+", ");
bw.write(ans+", ");
bw.write(status);
bw.newLine();
} catch (Exception e) {}
finally{
try {
if (bw != null)
bw.close();
if (fw != null)
fw.close();
}
catch (Exception ex) {
ex.printStackTrace();
}
}
}
public synchronized String swap(String studentID,String newCourseID,String oldCourseID) {
date = ZonedDateTime.now().format(DateTimeFormatter.ofPattern("E dd/MM/yyyy HH:mm:ss"));
String ans = "";
Send s1,s2;
int a,b,a_total,b_total;
String arguments = "( "+studentID+", "+newCourseID+", "+oldCourseID + " )";
if(oldCourseID.substring(0, 4).equals("SOEN")) {
s1 = new Send(3966,"sem",oldCourseID,studentID,"checkOld");
try {
s1.t.join();
if(s1.message.equals("no")) {
LogFile("none",studentID,date,arguments,"swap","not found","unsuccessful");
return "no";
}
else {
String sem = s1.message;
if(newCourseID.substring(0, 4).equals("SOEN")) {
s1 = new Send(3966,"sem",newCourseID,studentID,"checkcourse");
try {
s1.t.join();
if(s1.message.equals("no")) {
LogFile("none",studentID,date,arguments,"swap","not found","unsuccessful");
return "notfound";
}
}
catch(Exception e) {}
s1 = new Send(3966,sem,newCourseID,studentID,"seats");
s2 = new Send(3967,sem,newCourseID,studentID,"seats");
try{
s1.t.join();
s2.t.join();
}
catch(InterruptedException e){}
String[] a1 = s1.message.split(",");
String[] a2 = s2.message.split(",");
a_total = Integer.parseInt(a1[0]);
a = Integer.parseInt(a1[1]);
b = Integer.parseInt(a2[1]);
b_total = Integer.parseInt(a2[0]);
if(a+b >= 3) {
LogFile("none",studentID,date,arguments,"swap","seats full","unsuccessful");
return "full";
}
if(a+b < 3) {
s1 = new Send(3966,sem,oldCourseID,studentID,"drop");
try {
s1.t.join();
if(s1.message.equals("dropped")) {
s2 = new Send(3966,sem,newCourseID,studentID,"enroll");
s2.t.join();
msg = s2.message;
if(msg.equals("enroll")) {
LogFile("none",studentID,date,arguments,"swap","enrolled","successful");
return "enroll";
}
}
s1 = new Send(3966,sem,oldCourseID,studentID,"enroll");
s1.t.join();
return msg;
} catch (Exception e) { }
}
}
if(newCourseID.substring(0, 4).equals("INSE")) {
s1 = new Send(3967,"sem",newCourseID,studentID,"checkcourse");
try {
s1.t.join();
if(s1.message.equals("no")) {
LogFile("none",studentID,date,arguments,"swap","not found","unsuccessful");
return "notfound";
}
}
catch(Exception e) {}
s1 = new Send(3966,sem,newCourseID,studentID,"seats");
s2 = new Send(3967,sem,newCourseID,studentID,"seats");
try{
s1.t.join();
s2.t.join();
}
catch(InterruptedException e){}
String[] a1 = s1.message.split(",");
String[] a2 = s2.message.split(",");
a_total = Integer.parseInt(a1[0]);
a = Integer.parseInt(a1[1]);
b = Integer.parseInt(a2[1]);
b_total = Integer.parseInt(a2[0]);
if(a+b >= 3) {
LogFile("none",studentID,date,arguments,"swap","seats full","unsuccessful");
return "full";
}
if(a+b < 3) {
s1 = new Send(3966,sem,oldCourseID,studentID,"drop");
try {
s1.t.join();
if(s1.message.equals("dropped")) {
s2 = new Send(3967,sem,newCourseID,studentID,"enroll");
s2.t.join();
msg = s2.message;
if(msg.equals("enroll")) {
LogFile("none",studentID,date,arguments,"swap","enrolled","successful");
return "enroll";
}
}
s1 = new Send(3966,sem,oldCourseID,studentID,"enroll");
s1.t.join();
return msg;
} catch (Exception e) { }
}
}
if(newCourseID.substring(0, 4).equals("COMP")) {
boolean contains = false;
if(student_comp.student_comp_fall.containsKey(newCourseID))
contains = true;
if(student_comp.student_comp_winter.containsKey(newCourseID))
contains = true;
if(student_comp.student_comp_summer.containsKey(newCourseID))
contains = true;
if(!contains) {
LogFile("none",studentID,date,arguments,"swap","Course Not Found","unsuccessful");
return "notfound";
}
int i = 0;
if(sem.equals("Fall")) {
for(Map.Entry<String, List<String>> map1:student_comp.student_comp_fall.entrySet()){
List<String> l = map1.getValue();
if(l.contains(studentID))
i++;
}
}
if(sem.equals("Winter")) {
for(Map.Entry<String, List<String>> map1:student_comp.student_comp_winter.entrySet()){
List<String> l = map1.getValue();
if(l.contains(studentID))
i++;
}
}
if(sem.equals("Summer")) {
for(Map.Entry<String, List<String>> map1:student_comp.student_comp_summer.entrySet()){
List<String> l = map1.getValue();
if(l.contains(studentID))
i++;
}
}
if(i >= 3) {
LogFile("none",studentID,date,arguments,"swap","Limit exceed","unsuccessful");
return "limit";
}
if(i<3) {
s2 = new Send(3966,sem,oldCourseID,studentID,"drop");
s2.t.join();
if(s2.message.equals("dropped")) {
String res = enroll_comp(studentID, newCourseID, sem);
if(res.equals("enroll")) {
LogFile("none",studentID,date,arguments,"swap","enrolled","successful");
return res;
}
msg = res;
}
s2 = new Send(3966,sem,oldCourseID,studentID,"enroll");
s2.t.join();
return msg;
}
}
}
}
catch (Exception e) {}
}
if(oldCourseID.substring(0, 4).equals("INSE")) {
s1 = new Send(3967,"sem",oldCourseID,studentID,"checkOld");
try {
s1.t.join();
if(s1.message.equals("no")) {
LogFile("none",studentID,date,arguments,"swap","not found","unsuccessful");
return "no";
}
else {
String sem = s1.message;
if(newCourseID.substring(0, 4).equals("SOEN")) {
s1 = new Send(3966,"sem",newCourseID,studentID,"checkcourse");
try {
s1.t.join();
if(s1.message.equals("no")) {
LogFile("none",studentID,date,arguments,"swap","not found","unsuccessful");
return "notfound";
}
}
catch(Exception e) {}
s1 = new Send(3966,sem,newCourseID,studentID,"seats");
s2 = new Send(3967,sem,newCourseID,studentID,"seats");
try{
s1.t.join();
s2.t.join();
}
catch(InterruptedException e){}
String[] a1 = s1.message.split(",");
String[] a2 = s2.message.split(",");
a_total = Integer.parseInt(a1[0]);
a = Integer.parseInt(a1[1]);
b = Integer.parseInt(a2[1]);
b_total = Integer.parseInt(a2[0]);
if(a+b >= 3) {
LogFile("none",studentID,date,arguments,"swap","seats full","unsuccessful");
return "full";
}
if(a+b < 3) {
s1 = new Send(3967,sem,oldCourseID,studentID,"drop");
try {
s1.t.join();
if(s1.message.equals("dropped")) {
s2 = new Send(3966,sem,newCourseID,studentID,"enroll");
s2.t.join();
msg = s2.message;
if(msg.equals("enroll")) {
LogFile("none",studentID,date,arguments,"swap","enrolled","successful");
return "enroll";
}
}
s1 = new Send(3967,sem,oldCourseID,studentID,"enroll");
s1.t.join();
return msg;
} catch (Exception e) { }
}
}
if(newCourseID.equals("INSE")) {
s1 = new Send(3967,"sem",newCourseID,studentID,"checkcourse");
try {
s1.t.join();
if(s1.message.equals("no")) {
LogFile("none",studentID,date,arguments,"swap","not found","unsuccessful");
return "notfound";
}
}
catch(Exception e) {}
s1 = new Send(3966,sem,newCourseID,studentID,"seats");
s2 = new Send(3967,sem,newCourseID,studentID,"seats");
try{
s1.t.join();
s2.t.join();
}
catch(InterruptedException e){}
String[] a1 = s1.message.split(",");
String[] a2 = s2.message.split(",");
a_total = Integer.parseInt(a1[0]);
a = Integer.parseInt(a1[1]);
b = Integer.parseInt(a2[1]);
b_total = Integer.parseInt(a2[0]);
if(a+b >= 3) {
LogFile("none",studentID,date,arguments,"swap","seats full","unsuccessful");
return "full";
}
if(a+b < 3) {
s1 = new Send(3967,sem,oldCourseID,studentID,"drop");
try {
s1.t.join();
if(s1.message.equals("dropped")) {
s2 = new Send(3967,sem,newCourseID,studentID,"enroll");
s2.t.join();
msg = s2.message;
if(msg.equals("enroll")) {
LogFile("none",studentID,date,arguments,"swap","enrolled","successful");
return "enroll";
}
}
s1 = new Send(3967,sem,oldCourseID,studentID,"enroll");
s1.t.join();
return msg;
} catch (Exception e) { }
}
}
if(newCourseID.substring(0, 4).equals("COMP")) {
boolean contains = false;
if(CourseDetail_comp.comp_fall.containsKey(newCourseID))
contains = true;
if(CourseDetail_comp.comp_winter.containsKey(newCourseID))
contains = true;
if(CourseDetail_comp.comp_summer.containsKey(newCourseID))
contains = true;
if(!contains) {
LogFile("none",studentID,date,arguments,"swap","Course Not Found","unsuccessful");
return "notfound";
}
int i = 0;
if(sem.equals("Fall")) {
for(Map.Entry<String, List<String>> map1:student_comp.student_comp_fall.entrySet()){
List<String> l = map1.getValue();
if(l.contains(studentID))
i++;
}
}
if(sem.equals("Winter")) {
for(Map.Entry<String, List<String>> map1:student_comp.student_comp_winter.entrySet()){
List<String> l = map1.getValue();
if(l.contains(studentID))
i++;
}
}
if(sem.equals("Summer")) {
for(Map.Entry<String, List<String>> map1:student_comp.student_comp_summer.entrySet()){
List<String> l = map1.getValue();
if(l.contains(studentID))
i++;
}
}
if(i >= 3) {
LogFile("none",studentID,date,arguments,"swap","limit excced","unsuccessful");
return "limit";
}
if(i<3) {
s2 = new Send(3967,sem,oldCourseID,studentID,"drop");
s2.t.join();
if(s2.message.equals("dropped")) {
String res = enroll_comp(studentID, newCourseID, sem);
if(res.equals("enroll")) {
LogFile("none",studentID,date,arguments,"swap","enrolled","successful");
return res;
}
msg = res;
}
s2 = new Send(3967,sem,oldCourseID,studentID,"enroll");
s2.t.join();
return msg;
}
}
}
}
catch (Exception e) {}
}
if(oldCourseID.substring(0,4).equals("COMP")) {
String semester = "";
boolean contains = false;
if(student_comp.student_comp_fall.containsKey(oldCourseID))
semester = "Fall";
if(student_comp.student_comp_winter.containsKey(oldCourseID))
semester = "Winter";
if(student_comp.student_comp_summer.containsKey(oldCourseID)) {
System.out.println("sem taken");
semester = "Summer";
}
if(semester.equals("Fall")) {
List<String> ls = student_comp.student_comp_fall.get(oldCourseID);
if(ls.contains(studentID)) {
System.out.println("contains : ");
contains = true;
}
}
if(semester.equals("Winter")) {
List<String> ls = student_comp.student_comp_winter.get(oldCourseID);
if(ls.contains(studentID)) {
contains = true;
}
}
if(semester.equals("Summer")) {
List<String> ls = student_comp.student_comp_summer.get(oldCourseID);
if(ls.contains(studentID)) {
contains = true;
}
}
if(!contains) {
LogFile("none",studentID,date,arguments,"swap","not enrolled in old course","unsuccessful");
return "notenroll";
}
if(contains) {
if(newCourseID.substring(0, 4).equals("SOEN")) {
s1 = new Send(3966,"sem",newCourseID,studentID,"checkcourse");
try {
s1.t.join();
if(s1.message.equals("no")) {
LogFile("none",studentID,date,arguments,"swap","not found","unsuccessful");
System.out.println("1st no");
return "no";
}
}
catch(Exception e) {}
s1 = new Send(3966,semester,newCourseID,studentID,"seats");
s2 = new Send(3967,semester,newCourseID,studentID,"seats");
try{
s1.t.join();
s2.t.join();
}
catch(InterruptedException e){}
String[] a1 = s1.message.split(",");
String[] a2 = s2.message.split(",");
a_total = Integer.parseInt(a1[0]);
a = Integer.parseInt(a1[1]);
b = Integer.parseInt(a2[1]);
b_total = Integer.parseInt(a2[0]);
if(a+b >= 3) {
LogFile("none",studentID,date,arguments,"swap","seats full","unsuccessful");
return "full";
}
if(a_total + b_total >= 2) {
LogFile("none",studentID,date,arguments,"swap","Can't take more than 2 courses of other Dept","unsuccessful");
return "cant";
}
if(a+b < 3 && a_total + b_total < 2) {
String res = drop(studentID, oldCourseID);
try {
if(res.equals("dropped")) {
s1 = new Send(3966,semester,newCourseID,studentID,"enroll");
s1.t.join();
msg = s1.message;
if(s1.message.equals("enroll")) {
LogFile("none",studentID,date,arguments,"swap","enrolled","successful");
return "enroll";
}
}
enroll_comp(studentID, oldCourseID, semester);
return msg;
} catch (Exception e) { }
}
}
if(newCourseID.substring(0, 4).equals("INSE")) {
s1 = new Send(3967,"sem",newCourseID,studentID,"checkcourse");
try {