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

Collaboration diagram for iot::mqtt::server::broker::SubscriptionTree::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)
std::list< std::string >	getSubscriptions (const std::string &clientId) const
std::map< std::string, std::list< std::pair< std::string, uint8_t > > >	getSubscriptionTree () const
TopicLevel &	fromJson (const nlohmann::json &json)
nlohmann::json	toJson () const
void	clear ()

Private Member Functions
std::list< std::string >	getSubscriptions (const std::string &absoluteTopicLevel, const std::string &clientId) const
std::map< std::string, std::list< std::pair< std::string, uint8_t > > >	getSubscriptionTree (const std::string &absoluteTopicLevel) const

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

Detailed Description

Definition at line 87 of file SubscriptionTree.h.

Constructor & Destructor Documentation

TopicLevel()

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

explicit

Definition at line 128 of file SubscriptionTree.cpp.

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

References topicLevel.

Referenced by clear(), fromJson(), subscribe(), and iot::mqtt::server::broker::SubscriptionTree::SubscriptionTree().

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Member Function Documentation

appear()

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

Definition at line 133 of file SubscriptionTree.cpp.

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

References iot::mqtt::server::broker::Broker::appear(), appear(), clientIds, and topicLevels.

Referenced by iot::mqtt::server::broker::SubscriptionTree::appear(), and appear().

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clear()

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

(

)

Definition at line 345 of file SubscriptionTree.cpp.

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

References TopicLevel().

Referenced by iot::mqtt::server::broker::SubscriptionTree::clear().

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fromJson()

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

(

const nlohmann::json &

json

)

Definition at line 326 of file SubscriptionTree.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;
    }

References clientIds, fromJson(), TopicLevel(), and topicLevels.

Referenced by iot::mqtt::server::broker::SubscriptionTree::fromJson(), and fromJson().

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getSubscriptions() [1/2]

std::list< std::string > iot::mqtt::server::broker::SubscriptionTree::TopicLevel::getSubscriptions ( const std::string & absoluteTopicLevel, const std::string & clientId ) const

private

Definition at line 289 of file SubscriptionTree.cpp.

                                                                                                           {
        std::list<std::string> topicLevelList;
 
        for (const auto& [topicLevelName, nextTopicLevel] : topicLevels) {
            const std::string currentAbsoluteTopicLevel = absoluteTopicLevel + topicLevelName;
 
            if (nextTopicLevel.clientIds.contains(clientId)) {
                topicLevelList.push_back(currentAbsoluteTopicLevel);
            }
 
            topicLevelList.splice(topicLevelList.end(), nextTopicLevel.getSubscriptions(currentAbsoluteTopicLevel + "/", clientId));
        }
 
        return topicLevelList;
    }

References clientIds, getSubscriptions(), and topicLevels.

Referenced by getSubscriptions(), and getSubscriptions().

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getSubscriptions() [2/2]

std::list< std::string > iot::mqtt::server::broker::SubscriptionTree::TopicLevel::getSubscriptions

(

const std::string &

clientId

)

const

Definition at line 281 of file SubscriptionTree.cpp.

                                                                                                   {
        return getSubscriptions("", clientId);
    }

References getSubscriptions().

Referenced by iot::mqtt::server::broker::SubscriptionTree::getSubscriptions().

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getSubscriptionTree() [1/2]

std::map< std::string, std::list< std::pair< std::string, uint8_t > > > iot::mqtt::server::broker::SubscriptionTree::TopicLevel::getSubscriptionTree

(

)

const

Definition at line 285 of file SubscriptionTree.cpp.

                                                                                                                  {
        return getSubscriptionTree("");
    }

References getSubscriptionTree().

Referenced by iot::mqtt::server::broker::SubscriptionTree::getSubscriptionTree().

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getSubscriptionTree() [2/2]

std::map< std::string, std::list< std::pair< std::string, uint8_t > > > iot::mqtt::server::broker::SubscriptionTree::TopicLevel::getSubscriptionTree ( const std::string & absoluteTopicLevel ) const

private

Definition at line 307 of file SubscriptionTree.cpp.

                                                                                             {
        std::map<std::string, std::list<std::pair<std::string, uint8_t>>> topicLevelTree;
 
        for (const auto& [topicLevelName, nextTopicLevel] : topicLevels) {
            const std::string composedAbsoluteTopicLevelName = absoluteTopicLevel + topicLevelName;
 
            for (const auto& clientId : nextTopicLevel.clientIds) {
                topicLevelTree[composedAbsoluteTopicLevelName].emplace_back(clientId);
            }
 
            std::map<std::string, std::list<std::pair<std::string, uint8_t>>> subSubscriptionTree =
                nextTopicLevel.getSubscriptionTree(composedAbsoluteTopicLevelName + "/");
 
            topicLevelTree.insert(subSubscriptionTree.begin(), subSubscriptionTree.end());
        }
 
        return topicLevelTree;
    }

References clientIds, getSubscriptionTree(), and topicLevels.

Referenced by getSubscriptionTree(), and getSubscriptionTree().

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publish()

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

Definition at line 168 of file SubscriptionTree.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";
            }
        }
    }

References clientIds, iot::mqtt::server::broker::Message::getMessage(), iot::mqtt::server::broker::Message::getTopic(), publish(), iot::mqtt::server::broker::Broker::sendPublish(), iot::mqtt::Mqtt::toHexString(), and topicLevels.

Referenced by iot::mqtt::server::broker::SubscriptionTree::publish(), and publish().

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subscribe()

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

Definition at line 143 of file SubscriptionTree.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, SubscriptionTree::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();
    }

References clientIds, subscribe(), TopicLevel(), and topicLevels.

Referenced by iot::mqtt::server::broker::SubscriptionTree::subscribe(), and subscribe().

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toJson()

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

(

)

const

Definition at line 267 of file SubscriptionTree.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;
    }

References clientIds, toJson(), and topicLevels.

Referenced by iot::mqtt::server::broker::SubscriptionTree::toJson(), and toJson().

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unsubscribe() [1/2]

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

(

const std::string &

clientId

)

Definition at line 247 of file SubscriptionTree.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();
    }

References clientIds, topicLevel, topicLevels, and unsubscribe().

Referenced by unsubscribe(), and iot::mqtt::server::broker::SubscriptionTree::unsubscribe().

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unsubscribe() [2/2]

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

Definition at line 222 of file SubscriptionTree.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();
    }

References clientIds, topicLevel, topicLevels, and unsubscribe().

Referenced by unsubscribe(), and iot::mqtt::server::broker::SubscriptionTree::unsubscribe().

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Member Data Documentation

broker

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

private

Definition at line 114 of file SubscriptionTree.h.

clientIds

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

private

Definition at line 116 of file SubscriptionTree.h.

Referenced by appear(), fromJson(), getSubscriptions(), getSubscriptionTree(), publish(), subscribe(), toJson(), unsubscribe(), and unsubscribe().

topicLevel

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

private

Definition at line 119 of file SubscriptionTree.h.

Referenced by TopicLevel(), unsubscribe(), and unsubscribe().

topicLevels

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

private

Definition at line 117 of file SubscriptionTree.h.

Referenced by appear(), fromJson(), getSubscriptions(), getSubscriptionTree(), publish(), subscribe(), toJson(), unsubscribe(), and unsubscribe().

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

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