@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
final Channel channel = ctx.getChannel();
Message m = (Message) e.getMessage();
Tuple t = cb.receive(m);
if (m.type() == Type.DEREG) {
channel.close();
}
if (t != null) {
if (m.type() == Type.REG) {
PhysicalLocation pl = new PhysicalLocation(m.source().logId(), (Integer) t.get(0));
plMap.put(pl, channel);
ctx.setAttachment(pl);
}
Message rsp = new Message(m.type(), m.getAck(), m.destination(), m.source(), t);
channel.write(rsp);
}
}
private void handleTaintMessage(Message m) throws ExecException {
if (m.body().get(0).equals("cross")) { // cross-task (accumulates)
String sourceAlias = m.source().logId();
Map<Tuple, Set<String>> oneCTTT = crossTaskTaintTags.get(sourceAlias);
Tuple keys = (Tuple) m.body().get(1);
if (!oneCTTT.containsKey(keys)) {
oneCTTT.put(keys, new HashSet<String>());
}
Set<String> tags = oneCTTT.get(keys);
for (int i = 2; i < m.body().size(); i++) {
tags.add((String) m.body().get(i));
}
} else { // within-task (replaces)
currentWithinTaskTaintTag = new HashSet<String>();
for (int i = 1; i < m.body().size(); i++) {
currentWithinTaskTaintTag.add((String) m.body().get(i));
}
}
}
public void initialize() throws Exception {
this.communicator =
new Communicator() {
@Override
public Location myLocation() {
return location;
}
@Override
public void sendToCoordinator(Tuple message) {
senderReceiver.sendAsync(
new Message(location, PhysicalLocation.coordinatorLocation(), message));
}
@Override
public void sendDownstream(Tuple message) throws NoSuchLocationException {
if (withinTaskDownstreamNeighbors.isEmpty() && crossTaskDownstreamNeighbors.isEmpty())
throw new NoSuchLocationException(
"Line " + logicalLocation.logId() + " has no downstream neighbor.");
for (String neighbor : withinTaskDownstreamNeighbors) {
sendWithinTaskMessage(
neighbor, new Message(location, new LogicalLocation(neighbor), message));
}
for (String neighbor : crossTaskDownstreamNeighbors) {
senderReceiver.sendAsync(
new Message(location, new LogicalLocation(neighbor), message));
}
}
@Override
public void sendUpstream(Tuple message) throws NoSuchLocationException {
if (withinTaskUpstreamNeighbors.isEmpty())
throw new NoSuchLocationException(
"Line " + logicalLocation.logId() + " has no within-task upstream neighbor.");
for (String neighbor : withinTaskUpstreamNeighbors) {
sendWithinTaskMessage(
neighbor, new Message(location, new LogicalLocation(neighbor), message));
}
}
@Override
public void sendToAgents(LogicalLocation destination, Tuple tuple)
throws NoSuchLocationException {
if (!logicalIds.contains(destination.logId()))
throw new NoSuchLocationException(
"Logical location " + destination + " does not exist.");
senderReceiver.sendAsync(new Message(location, destination, tuple));
}
};
this.messageReceiptCallback =
new MessageReceiptCallback() {
public Tuple receive(Message m) {
if (m.type() == Message.Type.TAINT) {
try {
handleTaintMessage(m);
} catch (ExecException e) {
throw new RuntimeException("Error in taint logic.", e);
}
} else {
synchronized (monitorAgent) { // avoid concurrent calls to
// monitorAgent, and also
// wait for initialization
// to finish
monitorAgent.receiveMessage(m.source(), m.body());
}
}
return null; // default ack
}
@Override
public void ioError(PhysicalLocation addr, Exception e) {}
};
synchronized (monitorAgent) { // block tuple-processing and message
// receipt activity until initialization
// finishes
this.senderReceiver = new MessagingClient(masterAddr, messageReceiptCallback);
this.senderReceiver.connect();
monitorAgent.initialize(communicator);
// send registration message to master
Tuple regResponse = senderReceiver.sendSync(createRegistrationMessage());
// first part of registration response contains assigned physical
// location id
this.location = new PhysicalLocation(logicalLocation, (Integer) regResponse.get(0));
// next part of registration response contains pending incoming
// async messages
for (Iterator<Tuple> it = ((DataBag) regResponse.get(1)).iterator(); it.hasNext(); ) {
messageReceiptCallback.receive(Message.fromTuple(it.next()));
}
}
}