void checkIO() {
long timeout;
if (NewConnections.size() > 0) {
timeout = -1;
} else if (!Timers.isEmpty()) {
long now = new Date().getTime();
long k = Timers.firstKey();
long diff = k - now;
if (diff <= 0) timeout = -1; // don't wait, just poll once
else timeout = diff;
} else {
timeout = 0; // wait indefinitely
}
try {
if (timeout == -1) mySelector.selectNow();
else mySelector.select(timeout);
} catch (IOException e) {
e.printStackTrace();
}
}
void processIO() {
Iterator<SelectionKey> it = mySelector.selectedKeys().iterator();
while (it.hasNext()) {
SelectionKey k = it.next();
it.remove();
if (k.isConnectable()) isConnectable(k);
else if (k.isAcceptable()) isAcceptable(k);
else {
if (k.isWritable()) isWritable(k);
if (k.isReadable()) isReadable(k);
}
}
}
void close() {
try {
if (mySelector != null) mySelector.close();
} catch (IOException e) {
}
mySelector = null;
// run down open connections and sockets.
Iterator<ServerSocketChannel> i = Acceptors.values().iterator();
while (i.hasNext()) {
try {
i.next().close();
} catch (IOException e) {
}
}
// 29Sep09: We create an ArrayList of the existing connections, then iterate over
// that to call unbind on them. This is because an unbind can trigger a reconnect,
// which will add to the Connections HashMap, causing a ConcurrentModificationException.
// XXX: The correct behavior here would be to latch the various reactor methods to return
// immediately if the reactor is shutting down.
ArrayList<EventableChannel> conns = new ArrayList<EventableChannel>();
Iterator<EventableChannel> i2 = Connections.values().iterator();
while (i2.hasNext()) {
EventableChannel ec = i2.next();
if (ec != null) {
conns.add(ec);
}
}
Connections.clear();
ListIterator<EventableChannel> i3 = conns.listIterator(0);
while (i3.hasNext()) {
EventableChannel ec = i3.next();
eventCallback(ec.getBinding(), EM_CONNECTION_UNBOUND, null);
ec.close();
EventableSocketChannel sc = (EventableSocketChannel) ec;
if (sc != null && sc.isAttached()) DetachedConnections.add(sc);
}
ListIterator<EventableSocketChannel> i4 = DetachedConnections.listIterator(0);
while (i4.hasNext()) {
EventableSocketChannel ec = i4.next();
ec.cleanup();
}
DetachedConnections.clear();
}
public void run() {
try {
mySelector = Selector.open();
bRunReactor = true;
} catch (IOException e) {
throw new RuntimeException("Could not open selector", e);
}
while (bRunReactor) {
runLoopbreaks();
if (!bRunReactor) break;
runTimers();
if (!bRunReactor) break;
removeUnboundConnections();
checkIO();
addNewConnections();
processIO();
}
close();
}
public void signalLoopbreak() {
loopBreaker.set(true);
if (mySelector != null) mySelector.wakeup();
}