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/*
$RCSfile$
$Author$
Last Update: $Date$
$Revision$
REVISION HISTORY:
$Log$
Revision 1.1 1997/01/31 01:11:09 sumedh
Added the Nexus II source code files.
# Revision 1.1 1996/12/07 06:27:38 rajeev
# Initial revision
#
# Revision 1.1 1996/12/02 06:06:22 rajeev
# Initial revision
#
# Revision 1.1 1996/12/02 06:02:24 rajeev
# Initial revision
#
*/
// This class will handle the event generated when user presses "join/leave"
// button. It will maintain all the state associated with all the rooms
// It'll also create and maintain the rooms
// -- Rajeev Bector 11/26/96
// package NexusII.networking ;
// This is a SINGLETON
import java.net.* ;
import java.util.* ;
import java.awt.* ;
import java.io.* ;
//import NexusII.client.* ;
//import NexusII.util.* ;
//import NexusII.networking.* ;
import awtCommand.* ;
public class joinHandler implements Command,consts {
MT_Bounded_Queue write_q_ ;
Hashtable name_to_q_ ;
Hashtable name_to_handler_ ;
NexusClientApplet applet_ ;
// This will be called when the "join/leave" button is pressed
public joinHandler(MT_Bounded_Queue writer_q,NexusClientApplet applet) {
write_q_ = writer_q ;
applet_ = applet ;
// init. the Hashtables
name_to_q_ = new Hashtable(HASH_SIZE);
name_to_handler_ = new Hashtable(HASH_SIZE);
}
public Hashtable Mapper() {
return name_to_q_ ;
}
public void execute(Object target, Event evt, Object what) {
String roomName = applet_.GetRoomName() ;
if(roomName.length()==0) {
return ;
}
// if it is the join button
if(((String)what).equalsIgnoreCase(JOIN_STR)) {
//if already joined -- return
if(name_to_q_.get(roomName) != null)
return ;
// room doesnt exist
// Just in case the room name isn't listed
applet_.AddRoomName(roomName);
// create a new queue for the room to use
MT_Bounded_Queue q_ = new MT_Bounded_Queue(QUEUE_SIZE);
if(DEBUG) {
System.out.println("joinHandler: inserted the queue in hash ");
}
name_to_q_.put(roomName,q_);
roomHandler handler = new roomHandler(roomName,q_,write_q_,applet_);
name_to_handler_.put(roomName,handler);
// send a request to the server
sayJoinToServer(roomName);
// sendTestPacket(roomName,"URL","http://cumbia.cs.wustl.edu:4242/~sumedh/NexusII/NexusII.gif",q_);
} // of join
else {
// its a "leave packet"
if(name_to_q_.get(roomName) == null)
return ;
// remove the entry from the queue
name_to_q_.remove(roomName);
roomHandler handle = (roomHandler) name_to_handler_.get(roomName);
if(DEBUG)
System.out.println("joinHandler:Stopiing the room thread" + roomName);
handle.mystop();
// handle = null ;
// remove the entry from the queue
name_to_handler_.remove(roomName);
sayLeaveToServer(roomName);
} // of else
} // of execute
private void sayJoinToServer(String roomName) {
//if (DEBUG)
// System.out.println("In the say J to server...");
byte[] packetHeader = new byte[PACKET_HEADER_LENGTH] ;
String clientID = new String(NexusClientApplet.myName);
String roomID = new String("ROOT");
String contentType = new String("JOIN");
String contentLength = String.valueOf(roomName.length());
String content = new String(roomName);
// Make a proper packet out of it
dataPacket joinPacket = new dataPacket(clientID,roomID,contentType,contentLength,content);
// enqueue that packet for socketWriter to read
write_q_.nq(joinPacket);
}
private void sayLeaveToServer(String roomName) {
byte[] packetHeader = new byte[PACKET_HEADER_LENGTH] ;
String clientID = new String(NexusClientApplet.myName);
String roomID = new String("ROOT");
String contentType = new String("LEAVE");
String contentLength = new String(Integer.toString(roomName.length()));
String content = new String(roomName);
// Make a proper packet out of it
dataPacket leavePacket = new dataPacket(clientID,roomID,contentType,contentLength,content);
// enqueue that packet for socketWriter to read
write_q_.nq(leavePacket);
}
public void sendTestPacket(String roomName,String type,String content,MT_Bounded_Queue readq) {
byte[] packetHeader = new byte[PACKET_HEADER_LENGTH] ;
String clientID = new String(NexusClientApplet.myName);
String contentLength = new String(Integer.toString(content.length()));
// Make a proper packet out of it
dataPacket testPacket = new dataPacket(clientID,roomName,type,contentLength,content);
// enqueue that packet for socketWriter to read
readq.nq(testPacket);
}
}
// of class
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