public void run() {
// Register our handlers with reactor
PollItem poller = new PollItem(snapshot, ZMQ.Poller.POLLIN);
loop.addPoller(poller, new Snapshots(), this);
poller = new PollItem(collector, ZMQ.Poller.POLLIN);
loop.addPoller(poller, new Collector(), this);
loop.addTimer(1000, 0, new FlushTTL(), this);
loop.start();
loop.destroy();
ctx.destroy();
}
/**
* And the main task now sets-up child tasks, then starts its reactor. If you press Ctrl-C, the
* reactor exits and the main task shuts down.
*/
public static void main(String[] args) {
ZContext context = new ZContext();
LBBroker arg = new LBBroker();
// Prepare our context and sockets
arg.frontend = context.createSocket(ZMQ.ROUTER);
arg.backend = context.createSocket(ZMQ.ROUTER);
arg.frontend.bind("ipc://frontend.ipc");
arg.backend.bind("ipc://backend.ipc");
int clientNbr;
for (clientNbr = 0; clientNbr < NBR_CLIENTS; clientNbr++) ZThread.start(new ClientTask());
for (int workerNbr = 0; workerNbr < NBR_WORKERS; workerNbr++) ZThread.start(new WorkerTask());
// Queue of available workers
arg.workers = new LinkedList<ZFrame>();
// Prepare reactor and fire it up
ZLoop reactor = new ZLoop();
PollItem item = new PollItem(arg.backend, ZMQ.Poller.POLLIN);
reactor.addPoller(item, backendHandler, arg);
reactor.start();
context.destroy();
}
@Override
public int handle(ZLoop loop, PollItem item, Object arg_) {
LBBroker arg = (LBBroker) arg_;
ZMsg msg = ZMsg.recvMsg(arg.backend);
if (msg != null) {
ZFrame address = msg.unwrap();
// Queue worker address for load-balancing
arg.workers.add(address);
// Enable reader on frontend if we went from 0 to 1 workers
if (arg.workers.size() == 1) {
PollItem newItem = new PollItem(arg.frontend, ZMQ.Poller.POLLIN);
loop.addPoller(newItem, frontendHandler, arg);
}
// Forward message to client if it's not a READY
ZFrame frame = msg.getFirst();
if (Arrays.equals(frame.getData(), WORKER_READY)) msg.destroy();
else msg.send(arg.frontend);
}
return 0;
}