public void run() {
Event evt;
while (evt_thread != null && event_queue != null) {
try {
evt = (Event) event_queue.remove();
switch (evt.getType()) {
case Event.SUSPECT:
impl.suspect((Address) evt.getArg());
break;
case Event.MERGE:
impl.merge((Vector) evt.getArg());
break;
default:
Trace.error(
"GMS.run()",
"event handler thread encountered event of type "
+ Event.type2String(evt.getType())
+ ": not handled by me !");
break;
}
} catch (QueueClosedException closed) {
break;
} catch (Exception ex) {
Trace.warn("GMS.run()", "exception=" + ex);
}
}
}
/**
* An event is to be sent down the stack. The layer may want to examine its type and perform some
* action on it, depending on the event's type. If the event is a message MSG, then the layer may
* need to add a header to it (or do nothing at all) before sending it down the stack using <code>
* PassDown</code>. In case of a GET_ADDRESS event (which tries to retrieve the stack's address
* from one of the bottom layers), the layer may need to send a new response event back up the
* stack using <code>up_prot.up()</code>. The PING protocol is interested in several different
* down events, Event.FIND_INITIAL_MBRS - sent by the GMS layer and expecting a GET_MBRS_OK
* Event.TMP_VIEW and Event.VIEW_CHANGE - a view change event Event.BECOME_SERVER - called after
* client has joined and is fully working group member Event.CONNECT, Event.DISCONNECT.
*/
@SuppressWarnings("unchecked")
public Object down(Event evt) {
switch (evt.getType()) {
case Event.FIND_INITIAL_MBRS: // sent by GMS layer
case Event.FIND_ALL_VIEWS:
// sends the GET_MBRS_REQ to all members, waits 'timeout' ms or until 'num_initial_members'
// have been retrieved
long start = System.currentTimeMillis();
boolean find_all_views = evt.getType() == Event.FIND_ALL_VIEWS;
Promise<JoinRsp> promise = (Promise<JoinRsp>) evt.getArg();
List<PingData> rsps = find_all_views ? findAllViews(promise) : findInitialMembers(promise);
long diff = System.currentTimeMillis() - start;
if (log.isTraceEnabled())
log.trace("discovery took " + diff + " ms: responses: " + Util.printPingData(rsps));
return rsps;
case Event.TMP_VIEW:
case Event.VIEW_CHANGE:
List<Address> tmp;
view = (View) evt.getArg();
if ((tmp = view.getMembers()) != null) {
synchronized (members) {
members.clear();
members.addAll(tmp);
}
}
current_coord = !members.isEmpty() ? members.get(0) : null;
is_coord = current_coord != null && local_addr != null && current_coord.equals(local_addr);
return down_prot.down(evt);
case Event.BECOME_SERVER: // called after client has joined and is fully working group member
down_prot.down(evt);
is_server = true;
return null;
case Event.SET_LOCAL_ADDRESS:
local_addr = (Address) evt.getArg();
return down_prot.down(evt);
case Event.CONNECT:
case Event.CONNECT_WITH_STATE_TRANSFER:
case Event.CONNECT_USE_FLUSH:
case Event.CONNECT_WITH_STATE_TRANSFER_USE_FLUSH:
is_leaving = false;
group_addr = (String) evt.getArg();
Object ret = down_prot.down(evt);
handleConnect();
return ret;
case Event.DISCONNECT:
is_leaving = true;
handleDisconnect();
return down_prot.down(evt);
default:
return down_prot.down(evt); // Pass on to the layer below us
}
}
// Starts the simulation. It will end when no more packets are in the
// medium
public void runSimulator() {
Event next;
Packet p;
while (true) {
next = eventList.removeNext();
if (next == null) {
break;
}
if (traceLevel > 1) {
System.out.println();
System.out.println(
"main(): event received. t=" + next.getTime() + ", node=" + next.getEntity());
if (next.getType() == FROMLAYER2) {
p = next.getPacket();
System.out.print(" src=" + p.getSource() + ", ");
System.out.print("dest=" + p.getDest() + ", ");
System.out.print("contents=[");
for (int i = 0; i < NUMENTITIES - 1; i++) {
System.out.print(p.getMincost(i) + ", ");
}
System.out.println(p.getMincost(NUMENTITIES - 1) + "]");
} else if (next.getType() == LINKCHANGE) {
System.out.println(" Link cost change.");
}
}
time = next.getTime();
if (next.getType() == FROMLAYER2) {
p = next.getPacket();
if ((next.getEntity() < 0) || (next.getEntity() >= NUMENTITIES)) {
System.out.println("main(): Panic. Unknown event entity.");
} else {
entity[next.getEntity()].update(p);
}
} else if (next.getType() == LINKCHANGE) {
if (time < 10001.0) {
cost[0][1] = 20;
cost[1][0] = 20;
entity[0].linkCostChangeHandler(1, 20);
entity[1].linkCostChangeHandler(0, 20);
} else {
cost[0][1] = 1;
cost[1][0] = 1;
entity[0].linkCostChangeHandler(1, 1);
entity[1].linkCostChangeHandler(0, 1);
}
} else {
System.out.println("main(): Panic. Unknown event type.");
}
}
System.out.println("Simulator terminated at t=" + time + ", no packets in medium.");
}
public static void dispatchEvent(World world, Entity entity, Event event) {
if (scm.has(entity) && scm.get(entity).hasEventScripts(event.getType()))
for (Script script : scm.get(entity).getScriptsByEvent(event.getType())) {
script.run(world, event);
}
else
LOGGER.fine(
"Dispatch event " + event.getType() + " to a entity which do not has ScriptComponent");
}
/**
* @param event AbstractEvent
* @return EventType
*/
public static XLifecycleExtension.StandardModel getType(Event event) {
XLifecycleExtension.StandardModel type = XLifecycleExtension.StandardModel.COMPLETE;
if (event.getType().equals(Event.Type.STARTED)) {
type = XLifecycleExtension.StandardModel.START;
}
if (event.getType().equals(Event.Type.CANCELLED)) {
type = XLifecycleExtension.StandardModel.ATE_ABORT;
}
return type;
}
public EventBuilder setNewEntity(AbstractHibernateObject updated) {
if (updated != null) {
if (event.getType() == Type.DELETED || event.getType() == Type.EXPIRED) {
throw new IllegalArgumentException("You cannot set the new entity for a deletion event");
}
setEventData(updated);
event.setNewEntity(factory.entityToJson(updated));
}
return this;
}
@Test
public void testClone() {
final Event event = this.createTestEvent();
final Event clonedEvent = Event.create(event).build();
assertEquals(event.getType(), clonedEvent.getType());
assertEquals(event.isDistributed(), clonedEvent.isDistributed());
assertEquals(event.getData(), clonedEvent.getData());
assertEquals(event, clonedEvent);
}
// Priority handling, otherwise GMS.down(DISCONNECT) would block !
// Similar to FLUSH protocol
public void receiveDownEvent(Event evt) {
if (evt.getType() == Event.BLOCK_OK) {
passDown(evt);
return;
}
super.receiveDownEvent(evt);
}
/**
* <b>Callback</b>. Called by superclass when event may be handled.
*
* <p><b>Do not use <code>PassDown</code> in this method as the event is passed down by default by
* the superclass after this method returns !</b>
*
* @return boolean Defaults to true. If false, event will not be passed down the stack.
*/
public boolean handleDownEvent(Event evt) {
switch (evt.getType()) {
case Event.CONNECT:
passDown(evt);
try {
group_addr = (String) evt.getArg();
} catch (ClassCastException cce) {
Trace.error(
"GMS.handleDownEvent(CONNECT)",
"group address must " + "be a string (group name) to make sense");
}
impl.join(local_addr);
passUp(new Event(Event.CONNECT_OK));
startEventHandlerThread();
return false; // don't pass down: was already passed down
case Event.DISCONNECT:
impl.leave((Address) evt.getArg());
passUp(new Event(Event.DISCONNECT_OK));
stopEventHandlerThread();
initState();
return true; // pass down
}
return impl.handleDownEvent(evt);
}
public Object up(Event evt) {
switch (evt.getType()) {
case Event.MSG:
Message msg = (Message) evt.getArg();
DaisyHeader hdr = (DaisyHeader) msg.getHeader(getId());
if (hdr == null) break;
// 1. forward the message to the next in line if ttl > 0
short ttl = hdr.getTTL();
if (log.isTraceEnabled())
log.trace(local_addr + ": received message from " + msg.getSrc() + " with ttl=" + ttl);
if (--ttl > 0) {
Message copy = msg.copy(true);
copy.setDest(next);
copy.putHeader(getId(), new DaisyHeader(ttl));
msgs_forwarded++;
if (log.isTraceEnabled())
log.trace(local_addr + ": forwarding message to " + next + " with ttl=" + ttl);
down_prot.down(new Event(Event.MSG, copy));
}
// 2. Pass up
msg.setDest(null);
break;
}
return up_prot.up(evt);
}
public Object down(Event evt) {
if (drop_next && evt.getType() == Event.MSG) {
drop_next = false;
return null;
}
return super.down(evt);
}
@Test
public void deserializeEventDataAccountEvent() throws IOException {
String json = resource("account_event.json");
Event e = StripeObject.PRETTY_PRINT_GSON.fromJson(json, Event.class);
assertEquals(e.getType(), "account.updated");
}
public Object up(Event evt) {
switch (evt.getType()) {
case Event.MSG:
Message msg = (Message) evt.getArg();
ForkHeader hdr = (ForkHeader) msg.getHeader(id);
if (hdr == null) break;
if (hdr.fork_stack_id == null)
throw new IllegalArgumentException("header has a null fork_stack_id");
Protocol bottom_prot = get(hdr.fork_stack_id);
return bottom_prot != null
? bottom_prot.up(evt)
: this.unknownForkHandler.handleUnknownForkStack(msg, hdr.fork_stack_id);
case Event.VIEW_CHANGE:
for (Protocol bottom : fork_stacks.values()) bottom.up(evt);
break;
case Event.STATE_TRANSFER_OUTPUTSTREAM:
if (!process_state_events) break;
getStateFromMainAndForkChannels(evt);
return null;
case Event.STATE_TRANSFER_INPUTSTREAM:
if (!process_state_events) break;
setStateInMainAndForkChannels((InputStream) evt.getArg());
return null;
}
return up_prot.up(evt);
}
@Override
protected boolean handleEvent(Event evt) {
if (evt.isKeyEvent() && content != null && content.canAcceptKeyboardFocus()) {
if (content.handleEvent(evt)) {
content.requestKeyboardFocus();
return true;
}
}
if (super.handleEvent(evt)) {
return true;
}
switch (evt.getType()) {
case KEY_PRESSED:
case KEY_RELEASED:
{
int keyCode = evt.getKeyCode();
if (keyCode == Event.KEY_LEFT || keyCode == Event.KEY_RIGHT) {
return scrollbarH.handleEvent(evt);
}
if (keyCode == Event.KEY_UP
|| keyCode == Event.KEY_DOWN
|| keyCode == Event.KEY_PRIOR
|| keyCode == Event.KEY_NEXT) {
return scrollbarV.handleEvent(evt);
}
break;
}
case MOUSE_WHEEL:
if (scrollbarV.isVisible()) {
return scrollbarV.handleEvent(evt);
}
return false;
}
return evt.isMouseEvent() && contentArea.isMouseInside(evt);
}
/**
* addAthlete(String n, String t) This method creates an iterator, itr, and iterates through each
* event to match the event passed into the parameter, t. If t matches an event, it will check to
* make sure the athlete is not already in that event, and then add that athlete to the event. If
* the event does not match, or if the athlete is already in that event, the athlete will not be
* added
*
* @param t The event name that is compared with the events already created
* @param n The athlete name that is compared with the athletes already added
*/
public void addAthlete(String n, String t) {
Iterator<Event> itr1 = events.iterator();
Event currentEvent;
boolean eventExists = false;
boolean contains = false;
while (itr1.hasNext()) {
if (itr1.next().getType().equalsIgnoreCase(t)) {
eventExists = true;
}
}
if (!eventExists) {
throw new java.lang.IllegalArgumentException("Error " + "event not found");
}
itr1 = events.iterator();
while (itr1.hasNext()) {
currentEvent = itr1.next();
if (currentEvent.getType().equalsIgnoreCase(t)) {
Iterator<String> itr2 = currentEvent.getRoster().iterator();
while (itr2.hasNext()) {
String currAthlete = itr2.next();
if (currAthlete.equalsIgnoreCase(n)) {
contains = true;
break;
}
}
if (!contains) {
currentEvent.getRoster().add(n);
}
}
}
}
@SuppressWarnings("unchecked")
protected void dispatch(Event event) {
// all events go thru this loop
if (LOG.isDebugEnabled()) {
LOG.debug("Dispatching the event " + event.getClass().getName() + "." + event.toString());
}
Class<? extends Enum> type = event.getType().getDeclaringClass();
try {
EventHandler handler = eventDispatchers.get(type);
if (handler != null) {
handler.handle(event);
} else {
throw new Exception("No handler for registered for " + type);
}
} catch (Throwable t) {
// TODO Maybe log the state of the queue
LOG.fatal("Error in dispatcher thread", t);
// If serviceStop is called, we should exit this thread gracefully.
if (exitOnDispatchException
&& (ShutdownHookManager.get().isShutdownInProgress()) == false
&& stopped == false) {
Thread shutDownThread = new Thread(createShutDownThread());
shutDownThread.setName("AsyncDispatcher ShutDown handler");
shutDownThread.start();
}
}
}
public Object up(Event evt) {
switch (evt.getType()) {
case Event.MSG:
Message msg = (Message) evt.getArg();
LockingHeader hdr = (LockingHeader) msg.getHeader(id);
if (hdr == null) break;
Request req = (Request) msg.getObject();
if (log.isTraceEnabled())
log.trace("[" + local_addr + "] <-- [" + msg.getSrc() + "] " + req);
switch (req.type) {
case GRANT_LOCK:
case RELEASE_LOCK:
handleLockRequest(req);
break;
case LOCK_GRANTED:
handleLockGrantedResponse(req.lock_name, req.owner, msg.getSrc());
break;
case LOCK_DENIED:
handleLockDeniedResponse(req.lock_name, req.owner);
break;
case CREATE_LOCK:
handleCreateLockRequest(req.lock_name, req.owner);
break;
case DELETE_LOCK:
handleDeleteLockRequest(req.lock_name);
break;
case COND_SIG:
case COND_SIG_ALL:
handleSignalRequest(req);
break;
case LOCK_AWAIT:
handleAwaitRequest(req.lock_name, req.owner);
handleLockRequest(req);
break;
case DELETE_LOCK_AWAIT:
handleDeleteAwaitRequest(req.lock_name, req.owner);
break;
case SIG_RET:
handleSignalResponse(req.lock_name, req.owner);
break;
case CREATE_AWAITER:
handleCreateAwaitingRequest(req.lock_name, req.owner);
break;
case DELETE_AWAITER:
handleDeleteAwaitingRequest(req.lock_name, req.owner);
break;
default:
log.error("Request of type " + req.type + " not known");
break;
}
return null;
case Event.VIEW_CHANGE:
handleView((View) evt.getArg());
break;
}
return up_prot.up(evt);
}
public Object up(Event evt) {
switch (evt.getType()) {
case Event.VIEW_CHANGE:
handleView(evt.getArg());
break;
}
return up_prot.up(evt);
}
private Event getNextDisappearEventWithTheSameType(Event event, int position) {
for (int i = position, n = events.size(); i < n; i++) {
if (events.get(i).getType() == event.getType() && !events.get(i).isNoteAppear()) {
return events.get(i);
}
}
return null;
}
public Object down(Event evt) {
switch (evt.getType()) {
case Event.SET_LOCAL_ADDRESS:
local_addr = (Address) evt.getArg();
break;
}
return down_prot.down(evt);
}
public Object down(Event evt) {
if (channel != null) {
if (evt.getType() == Event.MSG && !(channel.isConnected() || channel.isConnecting()))
throw new IllegalStateException("channel is not connected");
return channel.down(evt);
}
return null;
}
/**
* Sends an event down the protocol stack. Note that - contrary to {@link #send(Message)}, if the
* event is a message, no checks are performed whether the channel is closed or disconnected.
*
* @param evt the message to send down, encapsulated in an event
*/
public Object down(Event evt) {
if (evt == null) return null;
if (stats && evt.getType() == Event.MSG) {
sent_msgs++;
sent_bytes += ((Message) evt.getArg()).getLength();
}
return prot_stack.down(evt);
}
public int getCompletedNotesCount(NoteType noteType) {
int disappearCount = 0;
for (Event event : events) {
if (!event.isNoteAppear() && noteType == event.getType()) {
disappearCount++;
}
}
return disappearCount;
}
public Object up(Event evt) {
switch (evt.getType()) {
case Event.MSG:
Message msg = (Message) evt.getArg();
// Do something with the event, e.g. extract the message and remove a header.
// Optionally pass up
break;
}
return up_prot.up(evt); // Pass up to the layer above us
}
/**
* Determines if an event should be printed or not.
*
* <p>Filters may be: - by event source - by event type
*
* @param source used to filter by
* @param event event to check
* @return true if filter does not match, else true
*/
private boolean shouldPrint(final Node source, final Event event) {
if (isNodeFiltered(source)) {
return false;
}
if (isTypeFiltered(event.getType())) {
return false;
}
return true;
}
public Object down(Event evt) {
switch (evt.getType()) {
case Event.TMP_VIEW:
case Event.VIEW_CHANGE:
handleViewChange((View) evt.getArg());
break;
case Event.GET_STATE:
Address target;
StateTransferInfo info = (StateTransferInfo) evt.getArg();
if (info.target == null) {
target = determineCoordinator();
} else {
target = info.target;
if (target.equals(local_addr)) {
log.error("%s: cannot fetch state from myself", local_addr);
target = null;
}
}
if (target == null) {
log.debug("%s: first member (no state)", local_addr);
up_prot.up(new Event(Event.GET_STATE_OK, new StateTransferInfo()));
} else {
Message state_req =
new Message(target)
.putHeader(this.id, new StateHeader(StateHeader.STATE_REQ))
.setFlag(Message.Flag.DONT_BUNDLE, Message.Flag.OOB, Message.Flag.SKIP_BARRIER);
log.debug("%s: asking %s for state", local_addr, target);
// suspend sending and handling of message garbage collection gossip messages,
// fixes bugs #943480 and #938584). Wake up when state has been received
/*if(log.isDebugEnabled())
log.debug("passing down a SUSPEND_STABLE event");
down_prot.down(new Event(Event.SUSPEND_STABLE, new Long(info.timeout)));*/
waiting_for_state_response = true;
start = System.currentTimeMillis();
down_prot.down(new Event(Event.MSG, state_req));
}
return null; // don't pass down any further !
case Event.CONFIG:
Map<String, Object> config = (Map<String, Object>) evt.getArg();
if (config != null && config.containsKey("flush_supported")) {
flushProtocolInStack = true;
}
break;
case Event.SET_LOCAL_ADDRESS:
local_addr = (Address) evt.getArg();
break;
}
return down_prot.down(evt); // pass on to the layer below us
}
@POST
@Consumes(MediaType.APPLICATION_JSON)
public Response post(List<Event> events) throws IOException {
Set<String> badEvents = Sets.newHashSet();
for (Event event : events) {
if (acceptedEventType(event.getType())) {
for (EventWriter writer : writers) {
writer.write(event);
}
increment(event.getType());
} else {
badEvents.add(event.getType());
}
}
if (!badEvents.isEmpty()) {
String errorMessage = "Invalid event type(s): " + Joiner.on(", ").join(badEvents);
return Response.status(Status.BAD_REQUEST).entity(errorMessage).build();
}
return Response.status(Response.Status.ACCEPTED).build();
}
/**
* getRoster(String t) Retrieves the athlete roster from the event, t, and returns it. If the
* event is not in the database, it returns null.
*
* @param t The event name that the method is searching for
* @return currentEvent.getRoster(), the roster, if the event is found, else it returns null if
* the event is empty or not in the database.
*/
public List<String> getRoster(String t) {
Iterator<Event> itr = events.iterator();
Event currentEvent;
while (itr.hasNext()) {
currentEvent = itr.next();
// checking to make sure event is register
if (currentEvent.getType().equalsIgnoreCase(t)) {
return currentEvent.getRoster();
}
}
return null;
}
/**
* removeEvent(String t) This method creates an iterator, itr, and iterates through each event to
* match the event passed into the parameter, t. If t matches an event, the method will remove the
* event, t, from the database, and it will return true. If the event, t, does not match a current
* event, it will return false.
*
* @param t The event name that is compared with the events already created
* @return true if the event is removed and false if the event, t, is not in the database and
* therefore not removed.
*/
public boolean removeEvent(String t) {
Iterator<Event> itr = events.iterator();
Event currentEvent;
while (itr.hasNext()) {
currentEvent = itr.next();
if (currentEvent.getType().equalsIgnoreCase(t)) {
events.remove(currentEvent);
return true;
}
}
return false;
}
public void addEvent(Event event) {
if (event == null) {
throw new IllegalArgumentException("Event could not be null");
}
Event latestEvent = getLatestEvent(event.getType());
if (latestEvent == null || latestEvent.isNoteAppear() != event.isNoteAppear()) {
events.add(event);
} else {
throw new IllegalArgumentException(
"Note could not appear twice in a row. It could only appear and then disappear");
}
}
