QuasarApp Heart

QuasarApp Heart - it is base backend for C++/Qt projects. This library support work with databases and work with lite network requests.

Futures

This library consists of two levels (AbstractNode level and DataBaseNode level).

• Support ssl sockets
• Support initialize database
• Support work in database
• Support decentralized network mode

AbstractNode level (0)

Description

The AbstractNode level implement only base functions of create a new work threads and parsing packages. For more information see QuasarApp Heart documentation, QH namespace.

DataBaseNode level (1)

Description

The DataBaseNode level implement methods and packages for work with databases. This level using Qt classes for wrking with database, so for more information about suport databases see Qt Documentation.

NetworkNode level (2)

Description

This level is still in develop.

Build and Include

For cmake projects

• cd yourRepo

• git submodule add https://github.com/QuasarApp/Heart.git # add the repository of Heart into your repo like submodule

• git submodule update --init --recursive

• Include in your CMakeLists.txt file the main CMakeLists.txt file of Heart library

  add_subdirectory(Heart)
  

• select requiriment build level for you project

  set(HEART_BUILD_LVL 2)
  

  where 1 - is code of build level

  1 - AbstractNode

  2 - DataBaseNode

  3 - NetworkNode

• link the Heart library to your target

  target_link_libraries(yourLib PUBLIC Heart)
  

• rebuild yuor project

Usage

Create a own package class and override some basic methods.

class MyPackage: public QH::AbstractData
{
public:
    MyPackage();

    // override this method for validation your package class
    bool isValid() const {
        return AbstractData::isValid();
    };                     /

    // your data for for server of client
    std::string _data = "";

protected:
    // StreamBase interface override this methods for serialization your package
    QDataStream &fromStream(QDataStream &stream) {
        AbstractData::fromStream(stream);
        stream >> _data;
        return stream;
    }
    QDataStream &toStream(QDataStream &stream) const {
        AbstractData::toStream(stream);
        stream << _data;
        return stream;
    }

};

Create a server class and override parsePackage method for work with packages.

class TestingServer: public QH::AbstractNode {
    Q_OBJECT
public:
    TestingServer() {
        registerPackageType<MyPackage>();
    }
 
protected:
    // override this method for processed received data.
    ParserResult parsePackage(const Package &pkg,
                              const AbstractNodeInfo *sender) {
 
        auto parentResult = AbstractNode::parsePackage(pkg, sender);
        if (parentResult != ParserResult::NotProcessed) {
            return parentResult;
        }
 
        auto result = commandHandler<MyPackage>(this, &MyClass::processMyPackage, pkg, sender, pkgHeader);
        if (result != QH::ParserResult::NotProcessed) {
            return result;
        }
 
        return ParserResult::NotProcessed;
    }
 
    bool processMyPackage(const QSharedPointer<MyPackage> &cardrequest,
                    const QH::AbstractNodeInfo *sender, const QH::Header &hdr) {
 
        BaseId requesterId = getSender(sender, &cardrequest);
 
        if (!cardrequest.isValid()) {
            badRequest(sender->networkAddress(), hdr);
            return ParserResult::Error;
        }
 
        cardrequest._data = "responce for client "
 
        SendData(cardrequest, sender->networkAddress(), &pkg.hdr);
        return ParserResult::Processed;
    }
};

Create a client class and override parsePackage method for work with packages.

class TestingClient: public QH::AbstractNode {


protected:
    // parsing incoming packages
    ParserResult parsePackage(const Package &pkg,
                                            const AbstractNodeInfo *sender) {
                                            
        auto parentResult = AbstractNode::parsePackage(pkg, sender);
        if (parentResult != ParserResult::NotProcessed) {
            return parentResult;
        }
    
        if (MyPackage::command() == pkg.hdr.command) {
            MyPackage obj(pkg);
   
            // print responce of server
            std::cout << obj._data;
            ...
            return ParserResult::Processed;            
        }
        // Do not forget return status of parsing packages
        return ParserResult::NotProcessed;
    
    }
    // sending request to server
    bool sendMyPackage() {
        Ping cmd;
        return sendData(&cmd, address);
    }
};

For more information, see our QuasarApp Heart Code Documentation.