@Override
public void run() {
try {
long now = System.currentTimeMillis();
synchronized (monitor) {
// Send due empty acknowledgements
Iterator<Map.Entry<Long, Collection<IncomingReliableMessageExchange>>>
dueAcknowledgements =
emptyAcknowledgementSchedule.asMap().headMap(now, true).entrySet().iterator();
while (dueAcknowledgements.hasNext()) {
Map.Entry<Long, Collection<IncomingReliableMessageExchange>> part =
dueAcknowledgements.next();
for (IncomingReliableMessageExchange messageExchange : part.getValue()) {
if (!messageExchange.isAcknowledgementSent()) {
InetSocketAddress remoteEndpoint = messageExchange.getRemoteEndpoint();
int messageID = messageExchange.getMessageID();
writeEmptyAcknowledgement(remoteEndpoint, messageID);
messageExchange.setAcknowledgementSent();
}
}
dueAcknowledgements.remove();
}
// Retire open NON messages
}
} catch (Exception e) {
log.error("Error in reliability task for incoming message exchanges!", e);
}
}
private void handleOutgoingCoapResponse(ChannelHandlerContext ctx, MessageEvent me) {
CoapResponse coapResponse = (CoapResponse) me.getMessage();
InetSocketAddress remoteEndpoint = (InetSocketAddress) me.getRemoteAddress();
IncomingMessageExchange messageExchange;
synchronized (monitor) {
messageExchange = ongoingMessageExchanges.remove(remoteEndpoint, coapResponse.getMessageID());
}
if (messageExchange instanceof IncomingReliableMessageExchange) {
// if the ongoing message exchange is reliable and the empty ACK was not yet sent make
// response piggy-
// backed and suppress scheduled empty ACK
if (!((IncomingReliableMessageExchange) messageExchange).isAcknowledgementSent()) {
coapResponse.setMessageType(MessageType.Name.ACK.getNumber());
((IncomingReliableMessageExchange) messageExchange).setAcknowledgementSent();
}
}
ctx.sendDownstream(me);
}