/*! Notifies all interested listeners of this transaction about the \a event.
If \a event is a closing event (ie. TRANSACTION_ENDED, and
TRANSACTION_ABORTED), all listeners except those listening to
TRANSACTION_WRITTEN will be removed.
*/
static void
notify_transaction_listeners(block_cache* cache, cache_transaction* transaction,
int32_t event)
{
bool isClosing = is_closing_event(event);
bool isWritten = is_written_event(event);
ListenerList::Iterator iterator = transaction->listeners.GetIterator();
while (iterator.HasNext()) {
cache_listener* listener = iterator.Next();
bool remove = (isClosing && !is_written_event(listener->events))
|| (isWritten && is_written_event(listener->events));
if (remove)
iterator.Remove();
if ((listener->events & event) != 0)
add_notification(cache, listener, event, remove);
else if (remove)
delete_notification(listener);
}
// This must work asynchronously in the kernel, but since we're not using
// most transaction events, we can do it here.
flush_pending_notifications(cache);
}
/*
* vislib::net::TcpServer::fireServerStopped
*/
void vislib::net::TcpServer::fireServerStopped(void) {
this->lock.Lock();
ListenerList::Iterator it = this->listeners.GetIterator();
while (it.HasNext()) {
it.Next()->OnServerStopped();
}
this->lock.Unlock();
}
/*
* vislib::net::CommServer::fireServerStarted
*/
void vislib::net::CommServer::fireServerStarted(void) {
VLSTACKTRACE("CommServer::fireServerStarted", __FILE__, __LINE__);
this->listeners.Lock();
ListenerList::Iterator it = this->listeners.GetIterator();
while (it.HasNext()) {
it.Next()->OnServerStarted(*this);
}
this->listeners.Unlock();
}
/*! Removes and deletes all listeners that are still monitoring this
transaction.
*/
static void
remove_transaction_listeners(block_cache* cache, cache_transaction* transaction)
{
ListenerList::Iterator iterator = transaction->listeners.GetIterator();
while (iterator.HasNext()) {
cache_listener* listener = iterator.Next();
iterator.Remove();
delete_notification(listener);
}
}
/*
* vislib::net::TcpServer::fireNewConnection
*/
bool vislib::net::TcpServer::fireNewConnection(Socket& socket,
const IPEndPoint& addr) {
bool retval = false;
this->lock.Lock();
ListenerList::Iterator it = this->listeners.GetIterator();
while (it.HasNext()) {
if ((retval = it.Next()->OnNewConnection(socket, addr))) {
break;
}
}
this->lock.Unlock();
return retval;
}
/*
* vislib::net::CommServer::fireServerError
*/
bool vislib::net::CommServer::fireServerError(
const vislib::Exception& exception) {
VLSTACKTRACE("CommServer::fireServerError", __FILE__, __LINE__);
bool retval = true;
this->listeners.Lock();
ListenerList::Iterator it = this->listeners.GetIterator();
while (it.HasNext()) {
retval = it.Next()->OnServerError(*this, exception) && retval;
}
this->listeners.Unlock();
VLTRACE(Trace::LEVEL_VL_ANNOYINGLY_VERBOSE, "CommServer "
"received exit request from registered error listener: %s\n",
!retval ? "yes" : "no");
return retval;
}
/*
* vislib::net::CommServer::fireNewConnection
*/
bool vislib::net::CommServer::fireNewConnection(
SmartRef<AbstractCommClientChannel>& channel) {
VLSTACKTRACE("CommServer::fireNewConnection", __FILE__, __LINE__);
bool retval = false;
this->listeners.Lock();
ListenerList::Iterator it = this->listeners.GetIterator();
while (it.HasNext()) {
if (it.Next()->OnNewConnection(*this, channel)) {
retval = true;
break;
}
}
this->listeners.Unlock();
VLTRACE(Trace::LEVEL_VL_ANNOYINGLY_VERBOSE, "CommServer informed "
"listeners about new connection. Was accepted: %s\n",
retval ? "yes" : "no");
return retval;
}
static fssh_status_t
add_transaction_listener(block_cache* cache, cache_transaction* transaction,
int32_t events, fssh_transaction_notification_hook hookFunction, void* data)
{
ListenerList::Iterator iterator = transaction->listeners.GetIterator();
while (iterator.HasNext()) {
cache_listener* listener = iterator.Next();
if (listener->data == data && listener->hook == hookFunction) {
// this listener already exists, just update it
listener->events |= events;
return FSSH_B_OK;
}
}
cache_listener* listener = new(std::nothrow) cache_listener;
if (listener == NULL)
return FSSH_B_NO_MEMORY;
set_notification(transaction, *listener, events, hookFunction, data);
transaction->listeners.Add(listener);
return FSSH_B_OK;
}
