iot::mqtt::server::broker::SubscribtionTree::TopicLevel Class Reference

Collaboration diagram for iot::mqtt::server::broker::SubscribtionTree::TopicLevel:

Public Member Functions
	TopicLevel (iot::mqtt::server::broker::Broker *broker, const std::string &topicLevel)
void	appear (const std::string &clientId, const std::string &topic)
bool	subscribe (const std::string &clientId, uint8_t qoS, std::string topic)
void	publish (Message &message, std::string topic)
bool	unsubscribe (const std::string &clientId, std::string topic)
bool	unsubscribe (const std::string &clientId)
TopicLevel &	fromJson (const nlohmann::json &json)
nlohmann::json	toJson () const
void	clear ()

Private Attributes
std::map< std::string, uint8_t >	clientIds
std::map< std::string, TopicLevel >	topicLevels
iot::mqtt::server::broker::Broker *	broker
std::string	topicLevel

Detailed Description

Definition at line 58 of file SubscribtionTree.h.

Constructor & Destructor Documentation

TopicLevel()

iot::mqtt::server::broker::SubscribtionTree::TopicLevel::TopicLevel ( iot::mqtt::server::broker::Broker * broker, const std::string & topicLevel )

explicit

Definition at line 85 of file SubscribtionTree.cpp.

        : broker(broker)
        , topicLevel(topicLevel) {
    }

Member Function Documentation

appear()

void iot::mqtt::server::broker::SubscribtionTree::TopicLevel::appear	(	const std::string &	clientId,
		const std::string &	topic )

Definition at line 90 of file SubscribtionTree.cpp.

                                                                                             {
        if (clientIds.contains(clientId)) {
            broker->appear(clientId, topic, clientIds[clientId]);
        }
 
        for (auto& [topicLevel, subscribtion] : topicLevels) {
            subscribtion.appear(clientId, std::string(topic).append(topic.empty() ? "" : "/").append(topicLevel));
        }
    }

clear()

void iot::mqtt::server::broker::SubscribtionTree::TopicLevel::clear

(

)

Definition at line 257 of file SubscribtionTree.cpp.

                                           {
        *this = TopicLevel(broker, "");
    }

fromJson()

SubscribtionTree::TopicLevel & iot::mqtt::server::broker::SubscribtionTree::TopicLevel::fromJson

(

const nlohmann::json &

json

)

Definition at line 238 of file SubscribtionTree.cpp.

                                                                                             {
        clientIds.clear();
        topicLevels.clear();
 
        if (json.contains("qos_map")) {
            for (const auto& subscriber : json["qos_map"].items()) {
                clientIds.emplace(subscriber.key(), subscriber.value());
            }
        }
 
        if (json.contains("topic_filter")) {
            for (const auto& topicLevelItem : json["topic_filter"].items()) {
                topicLevels.emplace(topicLevelItem.key(), TopicLevel(broker, topicLevelItem.key()).fromJson(topicLevelItem.value()));
            }
        }
 
        return *this;
    }

publish()

void iot::mqtt::server::broker::SubscribtionTree::TopicLevel::publish	(	Message &	message,
		std::string	topic )

Definition at line 125 of file SubscribtionTree.cpp.

                                                                              {
        if (topic.empty()) {
            LOG(INFO) << "MQTT Broker: Found match:";
            LOG(INFO) << "MQTT Broker:   Topic: '" << message.getTopic() << "';";
            LOG(INFO) << "MQTT Broker:   Message:\n" << iot::mqtt::Mqtt::toHexString(message.getMessage());
 
            LOG(INFO) << "MQTT Broker: Distribute PUBLISH for match ...";
            for (auto& [clientId, clientQoS] : clientIds) {
                broker->sendPublish(clientId, message, clientQoS, false);
            }
            LOG(INFO) << "MQTT Broker: ... distributing PUBLISH for match completed";
 
            const auto nextHashLevel = topicLevels.find("#");
            if (nextHashLevel != topicLevels.end()) {
                LOG(INFO) << "MQTT Broker: Found parent match:";
                LOG(INFO) << "MQTT Broker:   Topic: '" << message.getTopic() << "'";
                LOG(INFO) << "MQTT Broker:   Message:\n" << iot::mqtt::Mqtt::toHexString(message.getMessage());
 
                LOG(INFO) << "MQTT Broker: Distribute PUBLISH for match ...";
                for (auto& [clientId, clientQoS] : nextHashLevel->second.clientIds) {
                    broker->sendPublish(clientId, message, clientQoS, false);
                }
                LOG(INFO) << "MQTT Broker: ... distributing PUBLISH for match completed";
            }
        } else {
            const std::string topicLevel = topic.substr(0, topic.find('/'));
 
            topic.erase(0, topicLevel.size() + 1);
 
            auto foundNode = topicLevels.find(topicLevel);
            if (foundNode != topicLevels.end()) {
                foundNode->second.publish(message, topic);
            }
 
            foundNode = topicLevels.find("+");
            if (foundNode != topicLevels.end()) {
                foundNode->second.publish(message, topic);
            }
 
            foundNode = topicLevels.find("#");
            if (foundNode != topicLevels.end()) {
                LOG(INFO) << "MQTT Broker: Found match:";
                LOG(INFO) << "MQTT Broker:   Topic: '" << message.getTopic() << "'";
                LOG(INFO) << "MQTT Broker:   Message:\n" << iot::mqtt::Mqtt::toHexString(message.getMessage());
 
                LOG(INFO) << "MQTT Broker: Distribute PUBLISH for match '" << message.getTopic() << "' ...";
                for (auto& [clientId, clientQoS] : foundNode->second.clientIds) {
                    broker->sendPublish(clientId, message, clientQoS, false);
                }
                LOG(INFO) << "MQTT Broker: ... distributing PUBLISH for match completed";
            }
        }
    }

subscribe()

bool iot::mqtt::server::broker::SubscribtionTree::TopicLevel::subscribe	(	const std::string &	clientId,
		uint8_t	qoS,
		std::string	topic )

Definition at line 100 of file SubscribtionTree.cpp.

                                                                                                      {
        if (topic.empty()) {
            LOG(INFO) << "MQTT Broker: Subscribe";
            LOG(INFO) << "MQTT Broker:   ClientId: " << clientId;
 
            clientIds[clientId] = qoS;
        } else {
            const std::string topicLevel = topic.substr(0, topic.find('/'));
 
            topic.erase(0, topicLevel.size() + 1);
 
            const auto& [it, inserted] = topicLevels.insert({topicLevel, SubscribtionTree::TopicLevel(broker, topicLevel)});
 
            if (!it->second.subscribe(clientId, qoS, topic)) {
                LOG(DEBUG) << "MQTT Broker:   Erase topic: " << topicLevel << " /" << topic;
 
                topicLevels.erase(it);
            } else {
                LOG(INFO) << "MQTT Broker:   Topic: " << topicLevel << " /" << topic;
            }
        }
 
        return !topicLevels.empty() || !clientIds.empty();
    }

toJson()

nlohmann::json iot::mqtt::server::broker::SubscribtionTree::TopicLevel::toJson

(

)

const

Definition at line 224 of file SubscribtionTree.cpp.

                                                          {
        nlohmann::json json;
 
        for (const auto& [topicLevelName, topicLevel] : topicLevels) {
            json["topic_filter"][topicLevelName] = topicLevel.toJson();
        }
 
        for (const auto& [subscriber, qoS] : clientIds) {
            json["qos_map"][subscriber] = qoS;
        }
 
        return json;
    }

unsubscribe() [1/2]

bool iot::mqtt::server::broker::SubscribtionTree::TopicLevel::unsubscribe

(

const std::string &

clientId

)

Definition at line 204 of file SubscribtionTree.cpp.

                                                                          {
        if (clientIds.erase(clientId) != 0) {
            LOG(INFO) << "MQTT Broker: Unsubscribe";
            LOG(INFO) << "MQTT Broker:   ClientId: " << clientId;
            LOG(INFO) << "MQTT Broker:   Topic: " << topicLevel;
        }
 
        for (auto it = topicLevels.begin(); it != topicLevels.end();) {
            if (it->second.unsubscribe(clientId)) {
                LOG(DEBUG) << "MQTT Broker:   Erase Topic: " << it->first;
 
                it = topicLevels.erase(it);
            } else {
                ++it;
            }
        }
 
        return clientIds.empty() && topicLevels.empty();
    }

unsubscribe() [2/2]

bool iot::mqtt::server::broker::SubscribtionTree::TopicLevel::unsubscribe	(	const std::string &	clientId,
		std::string	topic )

Definition at line 179 of file SubscribtionTree.cpp.

                                                                                           {
        if (topic.empty()) {
            if (clientIds.erase(clientId) != 0) {
                LOG(INFO) << "MQTT Broker: Unsubscribe";
                LOG(INFO) << "MQTT Broker:   ClientId: " << clientId;
                LOG(INFO) << "MQTT Broker:   Topic: " << topicLevel;
            }
        } else {
            const std::string topicLevel = topic.substr(0, topic.find('/'));
 
            auto&& it = topicLevels.find(topicLevel);
            if (it != topicLevels.end()) {
                topic.erase(0, topicLevel.size() + 1);
 
                if (it->second.unsubscribe(clientId, topic)) {
                    LOG(DEBUG) << "MQTT Broker:   Erase Topic: " << it->first;
 
                    topicLevels.erase(it);
                }
            }
        }
 
        return clientIds.empty() && topicLevels.empty();
    }

Member Data Documentation

broker

iot::mqtt::server::broker::Broker* iot::mqtt::server::broker::SubscribtionTree::TopicLevel::broker

private

Definition at line 81 of file SubscribtionTree.h.

clientIds

std::map<std::string, uint8_t> iot::mqtt::server::broker::SubscribtionTree::TopicLevel::clientIds

private

Definition at line 77 of file SubscribtionTree.h.

topicLevel

std::string iot::mqtt::server::broker::SubscribtionTree::TopicLevel::topicLevel

private

Definition at line 82 of file SubscribtionTree.h.

topicLevels

std::map<std::string, TopicLevel> iot::mqtt::server::broker::SubscribtionTree::TopicLevel::topicLevels

private

Definition at line 79 of file SubscribtionTree.h.

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The documentation for this class was generated from the following files:

• iot/mqtt/server/broker/SubscribtionTree.h
• iot/mqtt/server/broker/SubscribtionTree.cpp