addListener #
Adds a listener to an event.
When an event is triggered, listeners are triggered in the order in which they were added.
Theses listener will receive a const std::string
as argument. This string is a JSON payload representing the event.
Arguments #
virtual kuzzleio::KuzzleEventEmitter* addListener(
kuzzleio::Event event,
kuzzleio::SharedEventListener listener);
Argument | Type | Description |
---|---|---|
event | kuzzleio::Event | An enum representing the listened event |
listener | kuzzleio::SharedEventListener | Smart pointer to a c++11 lambda |
event #
One of the following event:
KUZZLE_EVENT_CONNECTED,
KUZZLE_EVENT_DISCARDED,
KUZZLE_EVENT_DISCONNECTED,
KUZZLE_EVENT_LOGIN_ATTEMPT,
KUZZLE_EVENT_NETWORK_ERROR,
KUZZLE_EVENT_OFFLINE_QUEUE_POP,
KUZZLE_EVENT_OFFLINE_QUEUE_PUSH,
KUZZLE_EVENT_QUERY_ERROR,
KUZZLE_EVENT_RECONNECTED,
KUZZLE_EVENT_JWT_EXPIRED,
KUZZLE_EVENT_ERROR
listener #
EventListener
is defined as const std::function<void(const std::string)>
SharedEventListener
is defined as std::shared_ptr<EventListener>
Return #
The Kuzzle
instance.
Usage #
{
using kuzzleio::SharedEventListener;
using kuzzleio::EventListener;
SharedEventListener listener = std::make_shared<EventListener>(
[](const std::string &payload) {
std::cout << payload << std::endl;
});
SharedEventListener other_listener = std::make_shared<EventListener>(
[](const std::string &payload) {
std::cerr << payload << std::endl;
});
kuzzle
->addListener(kuzzleio::KUZZLE_EVENT_CONNECTED, listener)
->addListener(kuzzleio::KUZZLE_EVENT_CONNECTED, other_listener);
}
std::cout << "Listener successfully added" << std::endl;