public void stop() {
if (jmdns != null) {
for (Iterator<ServiceInfo> iter = serviceInfos.iterator(); iter.hasNext(); ) {
ServiceInfo si = iter.next();
jmdns.unregisterService(si);
}
// Close it down async since this could block for a while.
final JmDNS closeTarget = jmdns;
Thread thread =
new Thread() {
public void run() {
try {
if (JmDNSFactory.onClose(getLocalAddress())) {
closeTarget.close();
}
;
} catch (IOException e) {
LOG.debug(
"Error closing JmDNS " + getLocalhost() + ". This exception will be ignored.",
e);
}
}
};
thread.setDaemon(true);
thread.start();
jmdns = null;
}
}
/**
* Takes a calculated DFT results set, reformats the data, and sends it out to all registered
* listeners.
*/
private void dispatch(float[] results) {
Iterator<DFTResultsConverter> it = mListeners.iterator();
while (it.hasNext()) {
it.next().receive(results);
}
}
protected void advanceInitializers(IOFSwitchExt sw) {
CopyOnWriteArrayList<IOFInitializerListener> initializers = initializerMap.get(sw);
// Remove first initializer if it exists
Iterator<IOFInitializerListener> it = initializers.iterator();
if (it.hasNext()) {
IOFInitializerListener initializer = it.next();
initializers.remove(initializer);
log.debug("Remaining initializers for switch {}: {}", sw, initializers);
}
if (it.hasNext()) {
IOFInitializerListener initializer = it.next();
queueInitializer(sw, initializer);
} else {
/**
* Must synchronize here to ensure we don't transition into active while simultaneously being
* disconnected.
*/
synchronized (sw) {
if (!OFSwitchState.DISCONNECTED.equals(sw.getState())) {
sw.transitionToState(OFSwitchState.ACTIVE);
// Add switch to active list
addActiveSwitch(sw);
}
initializerMap.remove(sw);
}
}
}
private void releaseDialogs(boolean finish) {
// clean up dialogs when activity is pausing or finishing
for (Iterator<DialogWrapper> iter = dialogs.iterator(); iter.hasNext(); ) {
DialogWrapper p = iter.next();
Dialog dialog = p.getDialog();
boolean persistent = p.getPersistent();
// if the activity is pausing but not finishing, clean up dialogs only if
// they are non-persistent
if (finish || !persistent) {
if (dialog != null && dialog.isShowing()) {
dialog.dismiss();
}
dialogs.remove(p);
}
}
}
public List<Pet> getPets() {
List<Pet> sortme = new ArrayList<Pet>();
synchronized (pets) {
Iterator<Pet> it = pets.iterator();
while (it.hasNext()) {
Pet pet = it.next();
sortme.add(pet);
}
}
ComparatorPet pc = new ComparatorPet();
Collections.sort(sortme, pc);
// pets.clear();
return sortme;
}
@Override
public Iterator iterator() {
return copyOnWriteArrayList.iterator();
}
/**
* Handle replies to certain OFMessages, and pass others off to listeners
*
* @param sw
* @param msgs
* @throws IOException
*/
@SuppressWarnings("unchecked")
protected void handleMessages(IOFSwitchExt sw, List<OFMessage> msgs) throws IOException {
for (OFMessage m : msgs) {
// If we detect a write failure, break early so we can disconnect
if (((OFStream) sw.getInputStream()).getWriteFailure()) {
break;
}
// Always handle ECHO REQUESTS, regardless of state
switch (m.getType()) {
case ECHO_REQUEST:
OFMessageInStream in = sw.getInputStream();
OFMessageOutStream out = sw.getOutputStream();
OFEchoReply reply = (OFEchoReply) in.getMessageFactory().getMessage(OFType.ECHO_REPLY);
reply.setXid(m.getXid());
out.write(reply);
break;
case ECHO_REPLY:
// *Note, ECHO REPLIES need no handling due to last message timestamp
break;
case ERROR:
logError(sw, (OFError) m);
// fall through intentionally so error can be listened for
default:
switch (sw.getState()) {
case DISCONNECTED:
log.info("Switch {} in state DISCONNECTED, exiting message processing loop", sw);
return;
case HELLO_SENT:
if (m.getType() == OFType.HELLO) {
log.debug("HELLO from {}", sw);
sw.transitionToState(OFSwitchState.FEATURES_REQUEST_SENT);
// Send initial Features Request
sw.getOutputStream().write(factory.getMessage(OFType.FEATURES_REQUEST));
}
break;
case FEATURES_REQUEST_SENT:
if (m.getType() == OFType.FEATURES_REPLY) {
log.debug("Features Reply from {}", sw);
sw.setFeaturesReply((OFFeaturesReply) m);
// Send Description Statistics Request
OFStatisticsRequest sr = new OFStatisticsRequest();
sr.setStatisticType(OFStatisticsType.DESC);
sw.getOutputStream().write(sr);
sw.transitionToState(OFSwitchState.DESCRIPTION_STATISTICS_REQUEST_SENT);
}
break;
case DESCRIPTION_STATISTICS_REQUEST_SENT:
if (m.getType() == OFType.STATS_REPLY) {
OFStatisticsReply sr = (OFStatisticsReply) m;
if (sr.getStatisticType() == OFStatisticsType.DESC
&& sr.getStatistics().size() > 0) {
OFDescriptionStatistics desc =
(OFDescriptionStatistics) sr.getStatistics().get(0);
sw.setDescriptionStatistics(desc);
log.debug("Description Statistics Reply from {}: {}", sw, desc);
// Set config and request to receive the config
OFSetConfig config = (OFSetConfig) factory.getMessage(OFType.SET_CONFIG);
config.setMissSendLength((short) 0xffff).setLengthU(OFSetConfig.MINIMUM_LENGTH);
sw.getOutputStream().write(config);
sw.getOutputStream().write(factory.getMessage(OFType.BARRIER_REQUEST));
sw.getOutputStream().write(factory.getMessage(OFType.GET_CONFIG_REQUEST));
sw.transitionToState(OFSwitchState.GET_CONFIG_REQUEST_SENT);
}
}
break;
case GET_CONFIG_REQUEST_SENT:
if (m.getType() == OFType.GET_CONFIG_REPLY) {
OFGetConfigReply cr = (OFGetConfigReply) m;
if (cr.getMissSendLength() == (short) 0xffff) {
log.debug("Config Reply from {} confirms miss length set to 0xffff", sw);
sw.transitionToState(OFSwitchState.INITIALIZING);
CopyOnWriteArrayList<IOFInitializerListener> initializers =
(CopyOnWriteArrayList<IOFInitializerListener>) initializerList.clone();
// Add all existing initializers to the list
this.initializerMap.put(sw, initializers);
log.debug(
"Remaining initializers for switch {}: {}", sw, this.initializerMap.get(sw));
// Delete all pre-existing flows
if (deletePreExistingFlows) {
OFMatch match = new OFMatch().setWildcards(OFMatch.OFPFW_ALL);
OFMessage fm =
((OFFlowMod)
sw.getInputStream().getMessageFactory().getMessage(OFType.FLOW_MOD))
.setMatch(match)
.setCommand(OFFlowMod.OFPFC_DELETE)
.setOutPort(OFPort.OFPP_NONE)
.setLength(U16.t(OFFlowMod.MINIMUM_LENGTH));
sw.getOutputStream().write(fm);
sw.getOutputStream().write(factory.getMessage(OFType.BARRIER_REQUEST));
}
if (initializers.size() > 0) queueInitializer(sw, initializers.iterator().next());
else advanceInitializers(sw);
} else {
log.error(
"Switch {} refused to set miss send length to 0xffff, disconnecting", sw);
disconnectSwitch(((OFStream) sw.getInputStream()).getKey(), sw);
return;
}
}
break;
case INITIALIZING:
CopyOnWriteArrayList<IOFInitializerListener> initializers = initializerMap.get(sw);
Iterator<IOFInitializerListener> it = initializers.iterator();
if (it.hasNext()) {
IOFInitializerListener listener = it.next();
try {
listener.initializerReceive(sw, m);
} catch (Exception e) {
log.error(
"Error calling initializer listener: {} on switch: {} for message: {}, removing listener",
new Object[] {listener, sw, m});
advanceInitializers(sw);
}
}
break;
case ACTIVE:
List<IOFMessageListener> listeners = messageListeners.get(m.getType());
if (listeners != null) {
for (IOFMessageListener listener : listeners) {
try {
if (listener instanceof IOFSwitchFilter) {
if (!((IOFSwitchFilter) listener).isInterested(sw)) {
continue;
}
}
if (Command.STOP.equals(listener.receive(sw, m))) {
break;
}
} catch (Exception e) {
log.error(
"Failure calling listener ["
+ listener.toString()
+ "] with message ["
+ m.toString()
+ "]",
e);
}
}
} else {
log.debug("Unhandled OF Message: {} from {}", m, sw);
}
break;
} // end switch(sw.getState())
} // end switch(m.getType())
}
}
/**
* Creates a new iterator for iterating over all listeners.
*
* @return a new {@link Iterator} instance, never <code>null</code>.
*/
final Iterator createListenerIterator() {
return m_listeners.iterator();
}
protected void fireConflictRemoved() {
Iterator<IConflictListener> it = listeners.iterator();
while (it.hasNext()) {
it.next().onConflictsRemoved(this);
}
}
@Override
public void run() {
Iterator<TickedEventLoop> it;
TickedEventLoop eventLoop;
setName("Deadlock-" + this.getId());
while (true) {
it = eventLoops.iterator();
while (it.hasNext()) {
eventLoop = it.next();
if (eventLoop.deadlock_tick != eventLoop.deadlock_tick_lastseen) {
eventLoop.deadlock_tick_lastseen = eventLoop.deadlock_tick;
continue;
}
eventLoops.remove(eventLoop);
String trace = "";
Thread thread = eventLoop.myThread;
for (StackTraceElement stack : thread.getStackTrace()) {
trace += stack.toString() + "\n";
}
boolean kill = true;
if (listener != null) {
kill = listener.deadlockDetected(eventLoop, thread);
}
if (kill) {
log.log(
Level.SEVERE,
"Deadlock or infinite loop detected in thread {0}, attemping to stop ... Stack trace: \n{1}",
new Object[] {thread.getName(), trace});
SwissArmyKnife.logTraceOfAllThreads(log);
thread.interrupt();
try {
Thread.sleep(1000);
} catch (InterruptedException ex) {
return;
}
log.log(Level.SEVERE, "Attemping stop of thread {0}", thread.getName());
thread.stop();
if (listener != null) {
listener.deadlockAfterStop(eventLoop, thread);
}
if (gui) {
ErrorDialog diag;
diag = new ErrorDialog();
diag.setTitle("Deadlock: " + thread.getName());
diag.setErrorText(trace);
}
} else {
log.log(
Level.SEVERE,
"Deadlock or infinite loop detected in thread {0} (no action). Stack trace: \n{1}",
new Object[] {thread.getName(), trace});
}
}
try {
Thread.sleep(CHECK_INTERVAL_MILLIS);
} catch (InterruptedException ex) {
return;
}
}
}
