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loop can be infinity or not #32

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97 changes: 52 additions & 45 deletions mqtt/MQTT.php
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Original file line number Diff line number Diff line change
Expand Up @@ -1089,52 +1089,59 @@ protected function handle_publish($msgid=0)
}
}

/**
* Main Loop
*
* @return bool
* @throws \Exception
*/
public function loop()
/**
* Main Loop
*
* @param null|int $handleMessagesCount - if null loop will be infinity. If number loop will be ending after getting $handleMessagesCount
* @return void
* @throws Exception
*/
public function loop($handleMessagesCount = NULL)
{
Debug::Log(Debug::DEBUG, 'loop()');

while (true) {
# check if any commands awaits or topics to subscribe
if (!$this->cmdstore->countWaits() && empty($this->topics) && empty($this->topics_to_subscribe) && empty($this->subscribe_awaits)) {
Debug::Log(Debug::INFO, "loop(): No tasks, leaving...");
break;
}

# Subscribe topics
if (!empty($this->topics_to_subscribe)) {
list($last_subscribe_msgid, $last_subscribe_topics) = $this->do_subscribe();
$this->subscribe_awaits[$last_subscribe_msgid] = $last_subscribe_topics;
}
# Unsubscribe topics
if (!empty($this->topics_to_unsubscribe)) {
list($last_unsubscribe_msgid, $last_unsubscribe_topics) = $this->do_unsubscribe();
$this->unsubscribe_awaits[$last_unsubscribe_msgid] = $last_unsubscribe_topics;
}

try {
# It is the responsibility of the Client to ensure that the interval between Control Packets
# being sent does not exceed the Keep Alive value. In the absence of sending any other Control
# Packets, the Client MUST send a PINGREQ Packet [MQTT-3.1.2-23].
$this->keepalive();

$this->handle_message();

} catch (Exception\NetworkError $e) {
Debug::Log(Debug::INFO, 'loop(): Connection lost.');
$this->reconnect();
$this->subscribe($this->topics);
} catch (\Exception $e) {
throw $e;
}
}

return true;
Debug::Log(Debug::DEBUG, 'loop()');

$iterations = empty($handleMessagesCount) ? TRUE : $handleMessagesCount + 1;

while ($iterations) {
# check if any commands awaits or topics to subscribe
if (!$this->cmdstore->countWaits() && empty($this->topics) && empty($this->topics_to_subscribe) && empty($this->subscribe_awaits)) {
Debug::Log(Debug::INFO, "loop(): No tasks, leaving...");
break;
}

# Subscribe topics
if (!empty($this->topics_to_subscribe)) {
list($last_subscribe_msgid, $last_subscribe_topics) = $this->do_subscribe();
$this->subscribe_awaits[$last_subscribe_msgid] = $last_subscribe_topics;
}
# Unsubscribe topics
if (!empty($this->topics_to_unsubscribe)) {
list($last_unsubscribe_msgid, $last_unsubscribe_topics) = $this->do_unsubscribe();
$this->unsubscribe_awaits[$last_unsubscribe_msgid] = $last_unsubscribe_topics;
}

try {
# It is the responsibility of the Client to ensure that the interval between Control Packets
# being sent does not exceed the Keep Alive value. In the absence of sending any other Control
# Packets, the Client MUST send a PINGREQ Packet [MQTT-3.1.2-23].
$this->keepalive();

$this->handle_message();

} catch (Exception\NetworkError $e) {
Debug::Log(Debug::INFO, 'loop(): Connection lost.');
$this->reconnect();
$this->subscribe($this->topics);
} catch (\Exception $e) {
throw $e;
}

if ($iterations !== TRUE) {
$iterations--;
}
}

$this->disconnect();
}

protected $last_ping_time = 0;
Expand Down