private void handleSendable(SendableEvent e) {
log.debug(":handleSendable: " + e);
if (e.getDir() == Direction.DOWN) {
formatAndSend(e);
}
/* Now that the packet is sent, event follows his way */
if (e.getChannel().isStarted()) {
try {
e.go();
} catch (AppiaEventException ex) {
System.err.println("Event not initialized but tried to be " + "sent in UdpSimpleSession");
}
}
}
/* Event deserialization. Returns the event or null if something wrong
* happened.
*/
private void receiveFormatSend(DatagramPacket p) {
byte[] data = new byte[p.getLength()];
System.arraycopy(p.getData(), p.getOffset(), data, 0, p.getLength());
SendableEvent e = null;
Message msg = null;
try {
/* Extract event class name */
// size of class name
int sLength = ParseUtils.byteArrayToInt(data, 0);
// the class name
String className = new String(data, 4, sLength, "ISO-8859-1");
/* Create event */
Class c = Class.forName(className);
if (debugFull) {
logReader.debug(":receiveAndFormat: Reader, creating " + className + " event.");
}
e = (SendableEvent) c.newInstance();
msg = e.getMessage();
msg.setByteArray(data, 4 + sLength, data.length - (4 + sLength));
/* Extract channel hash and put event in it*/
mbuf.len = 4;
msg.pop(mbuf);
int channelHash = ParseUtils.byteArrayToInt(mbuf.data, mbuf.off);
Channel msgChannel = (Channel) parentSession.channels.get(new Integer(channelHash));
/* If channel does not exist, discard message */
if (msgChannel == null) {
if (debugFull)
logReader.debug(
this.getClass().getName()
+ ": channel does not exist. message will be discarded. "
+ "hash="
+ channelHash
+ " "
+ e);
return;
}
if (debugFull)
logReader.debug(
":receiveAndFormat: " + msgChannel.getChannelID() + " (" + channelHash + ")");
/* Extract the addresses and put them on the event */
// msg's source, futurely change udpsimple to common
InetSocketAddress addr = new InetSocketAddress(p.getAddress(), p.getPort());
e.source = addr;
// msg's destination
e.dest = dest;
// send event
e.asyncGo(msgChannel, Direction.UP);
} catch (Exception ex) {
if (logReader.isDebugEnabled()) {
ex.printStackTrace();
logReader.debug(
"Exception catched while processing message from "
+ p.getAddress().getHostName()
+ ":"
+ p.getPort()
+ ". Continued operation.");
}
}
}
private void formatAndSend(SendableEvent e) {
/* Event Class name */
try {
if (sock == null) {
if (!newSock(RegisterSocketEvent.FIRST_AVAILABLE, null, e.getChannel().getThreadFactory()))
throw new IOException("Impossible to create new socket.");
}
Message msg = e.getMessage();
MsgBuffer mbuf = new MsgBuffer();
byte[] eventType = e.getClass().getName().getBytes("ISO-8859-1");
int channelHash = e.getChannel().getChannelID().hashCode();
mbuf.len = 4;
msg.push(mbuf);
ParseUtils.intToByteArray(channelHash, mbuf.data, mbuf.off);
mbuf.len = eventType.length;
msg.push(mbuf);
System.arraycopy(eventType, 0, mbuf.data, mbuf.off, mbuf.len);
mbuf.len = 4;
msg.push(mbuf);
ParseUtils.intToByteArray(eventType.length, mbuf.data, mbuf.off);
if (msg.length() > param_MAX_UDPMSG_SIZE)
throw new IOException("Message length to great, may be truncated");
/* Create the packet and send it */
byte[] bytes = msg.toByteArray();
if ((e.dest instanceof AppiaMulticast)
&& (((AppiaMulticast) e.dest).getMulticastAddress() == null)) {
Object[] dests = ((AppiaMulticast) e.dest).getDestinations();
if (dests == null) {
System.err.println(
"UdpSimpleSession: Destinations field of AppiaMulticast empty. Not sending event "
+ e);
return;
}
DatagramPacket dp = new DatagramPacket(bytes, bytes.length);
for (int i = 0; i < dests.length; i++) {
if (dests[i] instanceof InetSocketAddress) {
dp.setAddress(((InetSocketAddress) dests[i]).getAddress());
dp.setPort(((InetSocketAddress) dests[i]).getPort());
sock.send(dp);
if (debugFull)
log.debug(
":formatAndSend: Multicast emulation: "
+ dp.getLength()
+ " bytes datagram sent to "
+ dp.getAddress().getHostAddress()
+ " (port "
+ dp.getPort()
+ ")");
} else log.error("UdpSimpleSession: Wrong destination address type in event " + e);
}
} else {
InetSocketAddress dest = null;
if (e.dest instanceof InetSocketAddress) {
dest = (InetSocketAddress) e.dest;
} else if (e.dest instanceof AppiaMulticast) {
Object aux = ((AppiaMulticast) e.dest).getMulticastAddress();
if (aux instanceof InetSocketAddress) {
dest = (InetSocketAddress) aux;
if (!dest.getAddress().isMulticastAddress()) {
System.err.println(
"UdpSimpleSession: Not a multicast address in AppiaMulticast of event " + e);
return;
}
} else {
System.err.println("UdpSimpleSession: Wrong multicast address type in event " + e);
return;
}
} else {
System.err.println("UdpSimpleSession: Wrong destination address type in event " + e);
return;
}
DatagramPacket dp =
new DatagramPacket(bytes, bytes.length, dest.getAddress(), dest.getPort());
sock.send(dp);
if (debugFull)
log.debug(
":formatAndSend: "
+ dp.getLength()
+ " bytes datagram sent to "
+ dp.getAddress().getHostAddress()
+ " (port "
+ dp.getPort()
+ ")");
}
} catch (IOException ex) {
if (log.isDebugEnabled()) ex.printStackTrace();
/* Couldn't send message to socket. */
try {
SendableNotDeliveredEvent snd = new SendableNotDeliveredEvent(e.getChannel(), this, e);
snd.go();
log.debug(
":formatAndSend: IOException when sending Datagram to socket. "
+ "Inserting SendableNotDeliveredEvent in the channel.");
} catch (AppiaEventException ex1) {
/* Possible exception: Unwanted Event */
ex.printStackTrace();
}
}
}