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Tugas Besar V IF3038 Pemrograman Internet #74

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- Synchronization
Chlorophyne committed May 20, 2013
commit 9612d4fc0010a398e6351795305e075df1cff798
37 changes: 35 additions & 2 deletions Client/src/client/Client.java
Original file line number Diff line number Diff line change
@@ -44,16 +44,49 @@ public static void main(String[] args) {
String username = inClient.readLine();
System.out.print("Enter password: ");
String password = inClient.readLine();
request = ("1,"+username+","+password);

request = ("1,"+username+","+password);
outServer.writeBytes(request + '\n');
respond = inServer.readLine();

String[] responds = respond.split(",");
if (responds[0].equals("200")){
c.lastUpdate = Long.parseLong(responds[1]);
System.out.println("Login successful, this client lastUpdate is "+c.lastUpdate);
//TODO:

//Synchronize...
request = ("4,"+username+","+c.lastUpdate);
outServer.writeBytes(request + '\n');

//menerima string berisi task_id dan status yang terupdate
respond = inServer.readLine();
responds = respond.split(",");
if (responds[0].equals("200")){
System.out.println("Synchronizing...");
String[] responds2;
for (int i = 1; i < responds.length; i++){
responds2 = responds[i].split(":");
System.out.println("task_id: " + responds2[0] + ", current status: " + responds2[1] + ", updated");
}

String request2, respond2;
long now = System.currentTimeMillis();
request2 = ""+now;
outServer.writeBytes(request2 + '\n');

respond2 = inServer.readLine();
if (respond2.equals("200")){
System.out.println("Update last update successful");
} else if (respond2.equals("400")){
System.out.println("Update last update failed");
} else {
System.out.println("Unrecognized respond");
}
} else if (responds[0].equals("400")){
System.out.println("No update...");
} else {
System.out.println("unrecognized respond");
}
System.out.println("Creating 'keep update' thread");
Runnable task = new MyRunnable();
Thread threadUpdate = new Thread(task);
49 changes: 49 additions & 0 deletions Server/src/server/Database.java
Original file line number Diff line number Diff line change
@@ -91,4 +91,53 @@ public String Uncheck(String task_id){
}
return message;
}

public String SynchronizeUponConnection(String username, Long lastUpdate){
String message = "400\n";
try{
preparedStatement = connection.prepareStatement("SELECT * FROM task JOIN task_asignee WHERE task.task_id = task_asignee.task_id AND username = ? AND timestamp > ? ");
preparedStatement.setString(1, username);
preparedStatement.setLong(2, lastUpdate);
resultSet = preparedStatement.executeQuery();
int rowcount = 0;
if (resultSet.last()) {
rowcount = resultSet.getRow();
resultSet.beforeFirst(); // not rs.first() because the rs.next() below will move on, missing the first element
}
if (rowcount != 0){ //jika ada hasilnya
message = "200,";

System.out.println("row(s) affected: "+rowcount);
while (resultSet.next()){
String task_id = resultSet.getString("task_id");
String _username = resultSet.getString("username");
String task_status = resultSet.getString("task_status");
long timestamp = resultSet.getLong("timestamp");
message += task_id+":"+task_status+",";
System.out.println("task_id: " + task_id + ", task_status; "+ task_status +", username: "+ _username +", timestamp: " + timestamp);
}
message = message.substring(0, message.length()-1);
message += "\n";
}
} catch (Exception e){
System.out.println("SynchronizedUponConnection Error: " + e.getMessage());
}
System.out.println(message);
return message;
}

public String UpdateLastUpdate(String username, Long lastUpdate){
String message = "400\n";
try{
preparedStatement = connection.prepareStatement("UPDATE user SET last_update = ? WHERE username = ?");
preparedStatement.setLong(1, lastUpdate);
preparedStatement.setString(2, username);
if (preparedStatement.executeUpdate() != 0){
message = "200\n"; //success
}
} catch (Exception e){
System.out.println("UpdateTaskStatus Error: " + e.getMessage());
}
return message;
}
}
24 changes: 24 additions & 0 deletions Server/src/server/Server.java
Original file line number Diff line number Diff line change
@@ -107,6 +107,30 @@ public void run() {
out.writeBytes(respond);
break;
}
case ("4"): //synchronize
{
//argumen 1 adalah username, argumen 2 adalah lastUpdate
String clientUsername = parts[1];
Long clientLastUpdate = Long.parseLong(parts[2]);
//lakukan sinkronisasi
respond = db.SynchronizeUponConnection(clientUsername, clientLastUpdate);
out.writeBytes(respond); //bila 200 berhasil, bila 400 tak ada update
String[] responds = respond.split(",");
if (responds[0].equals("200")){
System.out.println("Synchronizing...");
String request2, respond2;
respond2 = "400\n";
request2 = in.readLine();
clientLastUpdate = Long.parseLong(request2);
respond2 = db.UpdateLastUpdate(clientUsername, clientLastUpdate);
out.writeBytes(respond2);
} else if (responds[0].equals("400")){
System.out.println("No update...");
} else {

}
break;
}
default:
{
break;