@Override
public void run() {
Systrace.beginSection(Systrace.TRACE_TAG_REACT_JAVA_BRIDGE, "DispatchEventsRunnable");
try {
Systrace.endAsyncFlow(
Systrace.TRACE_TAG_REACT_JAVA_BRIDGE,
"ScheduleDispatchFrameCallback",
mHasDispatchScheduledCount);
mHasDispatchScheduled = false;
mHasDispatchScheduledCount++;
Assertions.assertNotNull(mRCTEventEmitter);
synchronized (mEventsToDispatchLock) {
// We avoid allocating an array and iterator, and "sorting" if we don't need to.
// This occurs when the size of mEventsToDispatch is zero or one.
if (mEventsToDispatchSize > 1) {
Arrays.sort(mEventsToDispatch, 0, mEventsToDispatchSize, EVENT_COMPARATOR);
}
for (int eventIdx = 0; eventIdx < mEventsToDispatchSize; eventIdx++) {
Event event = mEventsToDispatch[eventIdx];
// Event can be null if it has been coalesced into another event.
if (event == null) {
continue;
}
Systrace.endAsyncFlow(
Systrace.TRACE_TAG_REACT_JAVA_BRIDGE, event.getEventName(), event.getUniqueID());
event.dispatch(mRCTEventEmitter);
event.dispose();
}
clearEventsToDispatch();
mEventCookieToLastEventIdx.clear();
}
} finally {
Systrace.endSection(Systrace.TRACE_TAG_REACT_JAVA_BRIDGE);
}
}
/**
* Process events in the queue as they are added. The queue must be synchronized for thread safety
* but we must be careful not to block for too long or else new events get blocked from being
* added to the queue causing long delays. The design is to process events in batches. This allows
* for the most efficient use of computer cycles since much of the time the queue will not be
* blocked.
*
* <p>This method was modified by tap on 6/17/2004 to allow both efficient event processing and
* thread safety. Later optimized by msekoranja.
*/
public void run() {
// eventBatch is local and only referenced by a single thread so we
// don't have to synchronize it
int eventsToProcess = 0;
Event[] eventBatch = new Event[0];
while (!_killed) {
try {
// for performance reasons we don't want to block for too long
// synchronize _queue for thread safety
// copy all of the new queued events to the local batch and clear _queue
synchronized (_queue) {
// wait for new requests
while (!_killed && _queue.isEmpty()) _queue.wait();
if (!_killed) {
eventsToProcess = _queue.size();
// create new instance of batch array only if necessary
if (eventsToProcess > eventBatch.length) eventBatch = new Event[eventsToProcess];
// only copy (will not recreate array)
_queue.toArray(eventBatch);
_queue.clear();
// notify queue clean-up
_queue.notifyAll();
}
}
// process all events in the local batch until it is empty
for (int i = 0; !_killed && i < eventsToProcess; i++) {
// catch all exceptions, so that one buggy listener does not harm the others
final Event event = eventBatch[i];
try {
// remove from override id
final Object overrideId = eventBatch[i]._overrideId;
if (overrideId != null) {
synchronized (_overrideMap) {
_overrideMap.remove(overrideId);
}
}
event.dispatch();
} catch (Throwable th) {
th.printStackTrace();
}
decrementSyncCounter(eventBatch[i]);
eventBatch[i] = null; // allow to be gc'ed
Thread.yield();
}
} catch (Throwable th) {
th.printStackTrace();
}
}
}
void remove(Event ev) {
m_events.remove(ev);
ev.dispatch(
new Event.Switch() {
private void onObjectEvent(ObjectEvent e) {
if (e.equals(getLastEvent(e.getObject()))) {
m_objectEvents.remove(getKey(e.getObject()));
}
}
public void onCreate(CreateEvent e) {
onObjectEvent(e);
}
public void onDelete(DeleteEvent e) {
onObjectEvent(e);
}
public void onSet(SetEvent e) {
if (e.equals(getLastEvent(e.getObject(), e.getProperty()))) {
m_setEvents.remove(getKey(e.getObject(), e.getProperty()));
}
}
private void onCollectionEvent(PropertyEvent e) {
List lst = (List) m_collectionEvents.get(getKey(e.getObject(), e.getProperty()));
if (lst != null) {
lst.remove(e);
}
}
public void onAdd(AddEvent e) {
onCollectionEvent(e);
}
public void onRemove(RemoveEvent e) {
onCollectionEvent(e);
}
});
}
public void add(Event ev) {
m_events.add(ev);
ev.dispatch(
new Event.Switch() {
private void onObjectEvent(ObjectEvent e) {
m_objectEvents.put(getKey(e.getObject()), e);
ObjectType type = m_ssn.getObjectType(e.getObject());
for (Iterator it = type.getProperties().iterator(); it.hasNext(); ) {
Property prop = (Property) it.next();
Object key = getKey(e.getObject(), prop);
if (prop.isCollection()) {
if (m_collectionEvents.containsKey(key)) {
m_collectionEvents.remove(key);
}
} else {
if (m_setEvents.containsKey(key)) {
m_setEvents.remove(key);
}
}
}
}
public void onCreate(CreateEvent e) {
onObjectEvent(e);
}
public void onDelete(DeleteEvent e) {
Object key = getKey(e.getObject());
boolean found = false;
if (m_coalescing && getLastEvent(e.getObject()) != null) {
CreateEvent ce = (CreateEvent) getLastEvent(e.getObject());
for (Iterator it = m_events.iterator(); it.hasNext(); ) {
Event ev = (Event) it.next();
if (ev.equals(ce)) {
found = true;
}
if (!found) {
continue;
}
if (getKey(ev.getObject()).equals(key)) {
it.remove();
} else if (ev instanceof PropertyEvent) {
PropertyEvent pe = (PropertyEvent) ev;
if (key.equals(getKey(pe.getArgument()))) {
it.remove();
}
}
}
if (!found) {
throw new IllegalStateException();
}
}
onObjectEvent(e);
if (m_coalescing && found) {
m_objectEvents.remove(key);
for (int i = m_events.size() - 1; i >= 0; i--) {
if (m_events.get(i) instanceof DeleteEvent) {
DeleteEvent de = (DeleteEvent) m_events.get(i);
if (key.equals(getKey(de.getObject()))) {
m_objectEvents.put(key, de);
break;
}
}
}
}
}
public void onSet(SetEvent e) {
m_setEvents.put((getKey(e.getObject(), e.getProperty())), e);
}
private void onCollectionEvent(PropertyEvent e) {
Object key = getKey(e.getObject(), e.getProperty());
List lst = (List) m_collectionEvents.get(key);
if (lst == null) {
lst = new LinkedList();
m_collectionEvents.put(key, lst);
}
lst.add(e);
}
public void onAdd(AddEvent e) {
onCollectionEvent(e);
}
public void onRemove(RemoveEvent e) {
onCollectionEvent(e);
}
});
}
