// Disconnects from the spread daemon.
//////////////////////////////////////
/**
* Disconnects the connection to the daemon. Nothing else should be done with this connection
* after disconnecting it.
*
* @throws SpreadException if there is no connection or there is an error disconnecting
* @see SpreadConnection#connect(InetAddress, int, String, boolean, boolean)
*/
public void Disconnect()
{
// Check if we're connected.
////////////////////////////
if (connected == false)
{
throw new SpreadException("Not connected.");
}
// Get a new message.
/////////////////////
SpreadMessage killMessage = new SpreadMessage();
// Send it to our private group.
////////////////////////////////
killMessage.AddGroup(group);
// Set the service type.
////////////////////////
killMessage.ServiceType = SpreadMessage.KILL_MESS;
// Send the message.
////////////////////
Multicast(killMessage);
// Close the socket.
////////////////////
try
{
socket.Close();
}
catch (Exception e)
{
throw new SpreadException("close(): " + e);
}
}
public void Join(SpreadConnection c, string groupName)
{
// Check if this group has already been joined.
///////////////////////////////////////////////
if (this.connection != null)
{
throw new SpreadException("Already joined.");
}
// Set member variables.
////////////////////////
this.connection = c;
this.name = groupName;
// Error check the name.
////////////////////////
byte[] bytes;
try
{
bytes = System.Text.Encoding.ASCII.GetBytes(name);
}
catch (Exception e)
{
throw new SpreadException("Encoding not supported: " + e);
}
for (int i = 0; i < bytes.Length; i++)
{
// Make sure the byte (character) is within the valid range.
////////////////////////////////////////////////////////////
if ((bytes[i] < 36) || (bytes[i] > 126))
{
throw new SpreadException("Illegal character in group name.");
}
}
// Get a new message.
/////////////////////
SpreadMessage joinMessage = new SpreadMessage();
// Set the group we're sending to.
//////////////////////////////////
joinMessage.AddGroup(name);
// Set the service type.
////////////////////////
joinMessage.ServiceType = SpreadMessage.JOIN_MESS;
// Send the message.
////////////////////
connection.Multicast(joinMessage);
}
public void Leave()
{
// Check if we can leave.
/////////////////////////
if (connection == null)
{
throw new SpreadException("No group to leave.");
}
// Get a new message.
/////////////////////
SpreadMessage leaveMessage = new SpreadMessage();
// Set the group we're sending to.
//////////////////////////////////
leaveMessage.AddGroup(name);
// Set the service type.
////////////////////////
leaveMessage.ServiceType = SpreadMessage.LEAVE_MESS;
// Send the message.
////////////////////
connection.Multicast(leaveMessage);
// No longer connected.
///////////////////////
connection = null;
}
private void button3_Click(object sender, EventArgs e)
{
SpreadMessage msg;
try
{
msg = new SpreadMessage();
msg.IsSafe = true;
msg.AddGroup(comboBox1.Text);
msg.Data = System.Text.Encoding.ASCII.GetBytes(textBox3.Text);
// Send it
connection.Multicast(msg);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
