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Server3.java
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Server3.java
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package DCRS;
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;
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;
class student_inse{
static List<String> list11 = new ArrayList<>();
static List<String> list12 = new ArrayList<>();
static List<String> list13 = new ArrayList<>();
static HashMap<String,List<String>> student_inse_fall = new HashMap<>();
static HashMap<String,List<String>> student_inse_winter = new HashMap<>();
static HashMap<String,List<String>> student_inse_summer = new HashMap<>();
static HashMap<String, HashMap<String,List<String>>> std_inse = new HashMap<>();
static List<String> students_in = new ArrayList<>();
static List<String> advisor_in = new ArrayList<>();
public student_inse(){
list11.add("SOENS005");
student_inse_fall.put("INSE6261",list11);
std_inse.put("Fall", student_inse_fall);
list12.add("INSES002");
student_inse_winter.put("INSE2361", list12);
std_inse.put("Winter", student_inse_winter);
list13.add("INSES003");
student_inse_summer.put("INSE6401", list13);
std_inse.put("Summer", student_inse_summer);
students_in.add("INSES001");
students_in.add("INSES002");
students_in.add("INSES003");
advisor_in.add("INSEA1");
}
}
class CourseDetail_inse implements Serializable{
private static final long serialVersionUID = 1L;
static int capacity;
static HashMap<String,Integer> inse_fall = new HashMap<>();
static HashMap<String,Integer> inse_winter = new HashMap<>();
static HashMap<String,Integer> inse_summer = new HashMap<>();
static HashMap<String, HashMap<String,Integer>> hash_inse = new HashMap<>();
public CourseDetail_inse(){
capacity = 3;
inse_fall.put("INSE6261",capacity);
hash_inse.put("Fall", inse_fall);
inse_winter.put("INSE2361",capacity);
hash_inse.put("Winter", inse_winter);
inse_summer.put("INSE6401",capacity);
hash_inse.put("Summer", inse_summer);
}
static void set(int c){
capacity = c;
}
}
class Check_inse{
CourseDetail_inse cdc = new CourseDetail_inse();
student_inse sdc = new student_inse();
Set s;
public synchronized Set checkReply(String sem,String courseID,String sid,String msg){
if(msg.equals("checkcourse")) {
boolean contains = false;
if(CourseDetail_inse.inse_fall.containsKey(courseID))
contains = true;
if(CourseDetail_inse.inse_winter.containsKey(courseID))
contains = true;
if(CourseDetail_inse.inse_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;
if(student_inse.student_inse_fall.containsKey(courseID))
semester = "Fall";
if(student_inse.student_inse_winter.containsKey(courseID))
semester = "Winter";
if(student_inse.student_inse_summer.containsKey(courseID))
semester = "Summer";
if(semester.equals("Fall")) {
for(Map.Entry<String, List<String>>map : student_inse.student_inse_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_inse.student_inse_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_inse.student_inse_summer.entrySet()) {
List<String> ls = map.getValue();
if(ls.contains(sid))
contains = true;
}
}
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_inse.std_inse.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("3"))
st2 = "s"+entry1.getKey()+",";
else
st2 = st2 + "s"+entry1.getKey()+",";
str_array2[2] = 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;
System.out.println("st"+st);
System.out.println("value"+value);
}
System.out.println(!st1.equals("2"));
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_inse.student_inse_fall.containsKey(courseID)){
List<String> lst = student_inse.student_inse_fall.get(courseID);
lst.remove(sid);
student_inse.student_inse_fall.replace(courseID, student_inse.list11, lst);
Integer i = CourseDetail_inse.inse_fall.get(courseID);
CourseDetail_inse.inse_fall.replace(courseID, i, (i+1));
return new Set(sem, courseID, sid, "dropped");
}
if(student_inse.student_inse_winter.containsKey(courseID)){
List<String> lst = student_inse.student_inse_winter.get(courseID);
lst.remove(sid);
student_inse.student_inse_winter.replace(courseID, student_inse.list12, lst);
Integer i = CourseDetail_inse.inse_fall.get(courseID);
CourseDetail_inse.inse_winter.replace(courseID, i, (i+1));
return new Set(sem, courseID, sid, "dropped");
}
if(student_inse.student_inse_summer.containsKey(courseID)){
List<String> lst = student_inse.student_inse_summer.get(courseID);
lst.remove(sid);
student_inse.student_inse_summer.replace(courseID, student_inse.list13, lst);
Integer i = CourseDetail_inse.inse_summer.get(courseID);
CourseDetail_inse.inse_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_inse.inse_fall.entrySet()){
String str = map.getKey() + " " + map.getValue() + ",";
ar.add(str);
}
System.out.println(ar);
}
if(sem.equals("Winter")){
for(Map.Entry<String, Integer> map : CourseDetail_inse.inse_winter.entrySet()){
String str = map.getKey() + " " + map.getValue() + ",";
ar.add(str);
}
System.out.println(ar);
}
if(sem.equals("Summer")){
for(Map.Entry<String, Integer> map : CourseDetail_inse.inse_summer.entrySet()){
String str = map.getKey() + " " + map.getValue() + ",";
ar.add(str);
}
System.out.println(ar);
}
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_inse.student_inse_fall.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid))
j++;
}
}
if(sem.equals("Winter")){
System.out.println(student_inse.student_inse_winter);
for(Map.Entry<String, List<String>> map1:student_inse.student_inse_winter.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid))
j++;
}
}
if(sem.equals("Summer")){
for(Map.Entry<String, List<String>> map1:student_inse.student_inse_summer.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid))
j++;
}
}
for(Map.Entry<String, List<String>> map1:student_inse.student_inse_fall.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid))
i++;
}
System.out.println(student_inse.student_inse_winter);
for(Map.Entry<String, List<String>> map1:student_inse.student_inse_winter.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid))
i++;
}
for(Map.Entry<String, List<String>> map1:student_inse.student_inse_summer.entrySet()){
List<String> l = map1.getValue();
if(l.contains(sid))
i++;
}
System.out.println("SEATS IN INSE"+i);
s = new Set(sem, courseID, sid, Integer.toString(i)+","+Integer.toString(j));
return s;
}
if(msg.equals("enroll")){
int i = 0;
int j = 1000;
List<String> ls = new ArrayList<>();
HashMap<String, Integer> hm = CourseDetail_inse.hash_inse.get(sem);
if(!hm.containsKey(courseID))
return new Set(sem, courseID, sid, "notexists");
j = hm.get(courseID);
if(j == 0){
return new Set(sem, courseID, sid, "full");
}
if(courseID.substring(0,4).equals("INSE")){
if(student_inse.student_inse_fall.get(courseID) != null){
List<String> lst = student_inse.student_inse_fall.get(courseID);
if(lst.contains(sid)){
return new Set(sem, courseID, sid, "taken");
}
}
if(student_inse.student_inse_winter.get(courseID) != null){
List<String> lst = student_inse.student_inse_winter.get(courseID);
if(lst.contains(sid)){
return new Set(sem, courseID, sid, "taken");
}
}
if(student_inse.student_inse_summer.get(courseID) != null){
List<String> lst = student_inse.student_inse_summer.get(courseID);
if(lst.contains(sid)){
return new Set(sem, courseID, sid, "taken");
}
}
}
for(Map.Entry<String, HashMap<String,List<String>>> map: student_inse.std_inse.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_inse.std_inse.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");
}
}
}
if(i == 2){
return new Set(sem, courseID, sid, "cant");
}
if(i < 2 && j != 0){
if(courseID.substring(0,4).equals("INSE")){
if(sem.equals("Fall")){
if(!student_inse.student_inse_fall.containsKey(courseID) && CourseDetail_inse.inse_fall.containsKey(courseID))
{
ls.add(sid);
student_inse.student_inse_fall.put(courseID, ls);
}
else if(student_inse.student_inse_fall.containsValue(sid)){
return new Set(sem, courseID, sid, "taken");
}
else{
ls = student_inse.student_inse_fall.get(courseID);
ls.add(sid);
student_inse.student_inse_fall.replace(courseID, student_inse.list11, ls);
}
CourseDetail_inse.inse_fall.replace(courseID, j, j-1);
return new Set(sem, courseID, sid, "enroll");
}
if(sem.equals("Winter")){
if(!student_inse.student_inse_winter.containsKey(courseID) && CourseDetail_inse.inse_winter.containsKey(courseID))
{
ls.add(sid);
student_inse.student_inse_winter.put(courseID, ls);
}
else if(student_inse.student_inse_winter.containsValue(sid)){
return new Set(sem, courseID, sid, "taken");
}
else{
ls = student_inse.student_inse_winter.get(courseID);
ls.add(sid);
student_inse.student_inse_winter.replace(courseID, student_soen.list12, ls);
}
CourseDetail_inse.inse_winter.replace(courseID, j, j-1);
return new Set(sem, courseID, sid, "enroll");
}
if(sem.equals("Summer")){
if(!student_inse.student_inse_summer.containsKey(courseID) && CourseDetail_inse.inse_summer.containsKey(courseID))
{
ls.add(sid);
student_inse.student_inse_summer.put(courseID, ls);
}
else if(student_inse.student_inse_summer.containsValue(sid)){
return new Set(sem, courseID, sid, "taken");
}
else{
ls = student_inse.student_inse_summer.get(courseID);
ls.add(sid);
student_inse.student_inse_summer.replace(courseID, student_soen.list13, ls);
}
CourseDetail_inse.inse_summer.replace(courseID, j, j-1);
return new Set(sem, courseID, sid, "enroll");
}
}
}
}
return new Set(sem, courseID, sid, "na");
}
}
class Send3 implements Runnable{
Thread t;
int port;
Set s = new Set();
String message;
byte[] buffer1;
byte[] buffer2;
public Send3(int p,String sem,String courseID,String sid,String message) {
port = p;
this.message = message;
s = new Set(sem,courseID,sid,message);
t = new Thread(this);
t.start();
}
@Override
public void run() {
DatagramSocket socket = null;
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();
DatagramPacket packet = new DatagramPacket(buffer1, buffer1.length, host, port);
socket.send(packet);
buffer2 = new byte[1000];
DatagramPacket reply = new DatagramPacket(buffer2, buffer2.length);
socket.receive(reply);
ByteArrayInputStream in = new ByteArrayInputStream(buffer2);
ObjectInputStream objin = new ObjectInputStream(in);
s = (Set)objin.readObject();
setMsg(s.message);
}
catch(SocketException e){e.printStackTrace();}
catch(IOException e){e.printStackTrace();}
catch (ClassNotFoundException e) {
e.printStackTrace();
}
finally {
if(socket != null) socket.close();
}
}
public void setMsg(String msg){
this.message = msg;
}
public String getMsg(){
return message;
}
}
class Receive3 implements Runnable{
Thread t;
StudentDetails sd;
Check_inse c;
public Receive3() {
c = new Check_inse();
t = new Thread(this);
t.start();
}
@Override
public void run() {
DatagramSocket socket = null;
try{
socket = new DatagramSocket(3967);
byte[] buffer;
byte[] buffer1;
System.out.println("server 3 is running on port 3967...");
while(true){
buffer = new byte[20000];
buffer1 = new byte[20000];
DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
socket.receive(packet);
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());
System.out.println("message:"+s1.message);
ByteArrayOutputStream ob = new ByteArrayOutputStream();
ObjectOutputStream oo = new ObjectOutputStream(ob);
oo.writeObject(s1);
buffer1 = ob.toByteArray();
}
catch (Exception e) {
}
//reply back to client
DatagramPacket reply = new DatagramPacket(buffer1, buffer1.length, packet.getAddress(), packet.getPort());
socket.send(reply);
}
}
catch(SocketException e){}
catch (IOException e) { }
finally {
if(socket != null) socket.close();
}
}
}
public class Server3 {
static BufferedWriter bw = null;
static FileWriter fw = null;
static CourseDetail_inse cdc;
static student_inse 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("./InseServer/INSEServer.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 = "";
Send3 s1,s2;
String arguments = "( "+studentID+", "+newCourseID+", "+oldCourseID + " )";
int a,b,a_total,b_total;
if(oldCourseID.substring(0, 4).equals("COMP")) {
s1 = new Send3(3965,"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("COMP")) {
s1 = new Send3(3965,"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 Send3(3965,sem,newCourseID,studentID,"seats");
s2 = new Send3(3966,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 Send3(3965,sem,oldCourseID,studentID,"drop");
try {
s1.t.join();
if(s1.message.equals("dropped")) {
s2 = new Send3(3965,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 Send3(3965,sem,oldCourseID,studentID,"enroll");
s1.t.join();
return msg;
} catch (Exception e) { }
}
}
if(newCourseID.substring(0, 4).equals("SOEN")) {
s1 = new Send3(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 Send3(3965,sem,newCourseID,studentID,"seats");
s2 = new Send3(3966,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 Send3(3965,sem,oldCourseID,studentID,"drop");
try {
s1.t.join();
if(s1.message.equals("dropped")) {
s2 = new Send3(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 Send3(3965,sem,oldCourseID,studentID,"enroll");
s1.t.join();
return msg;
} catch (Exception e) { }
}
}
if(newCourseID.substring(0, 4).equals("INSE")) {
boolean contains = false;
if(student_inse.student_inse_fall.containsKey(newCourseID))
contains = true;
if(student_inse.student_inse_winter.containsKey(newCourseID))
contains = true;
if(student_inse.student_inse_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_inse.student_inse_fall.entrySet()){
List<String> l = map1.getValue();
if(l.contains(studentID))
i++;
}
}
if(sem.equals("Winter")) {
for(Map.Entry<String, List<String>> map1:student_inse.student_inse_winter.entrySet()){
List<String> l = map1.getValue();
if(l.contains(studentID))
i++;
}
}
if(sem.equals("Summer")) {
for(Map.Entry<String, List<String>> map1:student_inse.student_inse_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 Send3(3965,sem,oldCourseID,studentID,"drop");
s2.t.join();
if(s2.message.equals("dropped")) {
String res = enroll_inse(studentID, newCourseID, sem);
if(res.equals("enroll")) {
LogFile("none",studentID,date,arguments,"swap","enrolled","successful");
return res;
}
msg = res;
}
enroll_inse(studentID, oldCourseID, sem);
return msg;
}
}
}
}
catch (Exception e) {}
}
if(oldCourseID.substring(0, 4).equals("SOEN")) {
s1 = new Send3(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("COMP")) {
s1 = new Send3(3965,"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 Send3(3965,sem,newCourseID,studentID,"seats");
s2 = new Send3(3966,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 Send3(3966,sem,oldCourseID,studentID,"drop");
try {
s1.t.join();
if(s1.message.equals("dropped")) {
s2 = new Send3(3965,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 Send3(3966,sem,oldCourseID,studentID,"enroll");
s1.t.join();
return msg;
} catch (Exception e) { }
}
}
if(newCourseID.equals("SOEN")) {
s1 = new Send3(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 Send3(3965,sem,newCourseID,studentID,"seats");
s2 = new Send3(3966,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 Send3(3966,sem,oldCourseID,studentID,"drop");
try {
s1.t.join();
if(s1.message.equals("dropped")) {
s2 = new Send3(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 Send3(3966,sem,oldCourseID,studentID,"enroll");
s1.t.join();
return msg;
} catch (Exception e) { }
}
}
if(newCourseID.substring(0, 4).equals("INSE")) {
boolean contains = false;
if(student_inse.student_inse_fall.containsKey(newCourseID))
contains = true;
if(student_inse.student_inse_winter.containsKey(newCourseID))
contains = true;
if(student_inse.student_inse_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_inse.student_inse_fall.entrySet()){
List<String> l = map1.getValue();
if(l.contains(studentID))
i++;
}
}
if(sem.equals("Winter")) {
for(Map.Entry<String, List<String>> map1:student_inse.student_inse_winter.entrySet()){
List<String> l = map1.getValue();
if(l.contains(studentID))
i++;
}
}
if(sem.equals("Summer")) {
for(Map.Entry<String, List<String>> map1:student_inse.student_inse_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 Send3(3966,sem,oldCourseID,studentID,"drop");
s2.t.join();
if(s2.message.equals("dropped")) {
String res = enroll_inse(studentID, newCourseID, sem);
if(res.equals("enroll")) {
LogFile("none",studentID,date,arguments,"swap","enrolled","successful");
return res;
}
msg = res;
}
enroll_inse(studentID, oldCourseID, sem);
return msg;
}
}
}
}
catch (Exception e) {}
}
if(oldCourseID.substring(0,4).equals("INSE")) {
String semester = "";
boolean contains = false;
if(student_inse.student_inse_fall.containsKey(oldCourseID))
semester = "Fall";
if(student_inse.student_inse_winter.containsKey(oldCourseID))
semester = "Winter";
if(student_inse.student_inse_summer.containsKey(oldCourseID)) {
semester = "Summer";
}
if(semester.equals("Fall")) {
List<String> ls = student_inse.student_inse_fall.get(oldCourseID);
if(ls.contains(studentID))
contains = true;
}
if(semester.equals("Winter")) {
List<String> ls = student_inse.student_inse_winter.get(oldCourseID);
if(ls.contains(studentID))
contains = true;
}
if(semester.equals("Summer")) {
List<String> ls = student_inse.student_inse_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("COMP")) {
s1 = new Send3(3965,"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 Send3(3965,semester,newCourseID,studentID,"seats");
s2 = new Send3(3966,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 Send3(3965,semester,newCourseID,studentID,"enroll");
s1.t.join();
msg = s1.message;
if(msg.equals("enroll")) {
LogFile("none",studentID,date,arguments,"swap","enrolled","successful");
return "enroll";
}
}
enroll_inse(studentID, oldCourseID, semester);
return msg;
} catch (Exception e) { }
}
}
if(newCourseID.substring(0, 4).equals("SOEN")) {
s1 = new Send3(3965,"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 Send3(3965,semester,newCourseID,studentID,"seats");
s2 = new Send3(3966,semester,newCourseID,studentID,"seats");