QIviServiceManager Class
QIviServiceManager provides the backends to QIviAbstractFeature. More...
| Header: | #include <QIviServiceManager> |
| qmake: | QT += ivicore |
| Instantiated By: | ServiceManager |
| Inherits: | QAbstractListModel |
Public Types
| enum | BackendType { ProductionBackend, SimulationBackend } |
| enum | Roles { NameRole, ServiceObjectRole, InterfacesRole } |
| enum | SearchFlag { IncludeProductionBackends, IncludeSimulationBackends, IncludeAll } |
| flags | SearchFlags |
Public Functions
| QList<QIviServiceObject *> | findServiceByInterface(const QString &interface, QIviServiceManager::SearchFlags searchFlags = IncludeAll) |
| bool | hasInterface(const QString &interface) const |
| bool | registerService(QObject *serviceBackendInterface, const QStringList &interfaces, QIviServiceManager::BackendType backendType = ProductionBackend) |
Reimplemented Public Functions
| virtual QVariant | data(const QModelIndex &index, int role) const override |
| virtual QHash<int, QByteArray> | roleNames() const override |
| virtual int | rowCount(const QModelIndex &parent = QModelIndex()) const override |
Static Public Members
| QIviServiceManager * | instance() |
Detailed Description
QIviServiceManager is the heart of QtIvi and provides you with an easy way to detect which backends and interfaces are available.
By default QIviServiceManager reads the metaData of all plugins within the "qtivi" folder of your plugin path. The plugin itself will be loaded once it's explicitly requested by the developer by using findServiceByInterface().
The manager can distinguish between Production and Simulation backends. For the recognition either the filename or the metaData is used.
Simulation Backends can set the simulation key in their plugin metadata to true or use one of two supported plugin postfixes (_simulation, _simulator) in the plugin filename.
The registerService() function can be used to add Backend classes without putting them into a plugin.
The service manager is a process wide singleton and can be accessed through the instance method.
For more detailed information on which plugins are recognized, enable the "qt.ivi.servicemanagement" logging category.
See Dynamic Backend System for more information about how backend loading works.
Note: The QIviServiceManager will only accept plugins, which match the build configuration used for building qtivicore. This means qtivicore "release" build, doesn't accept plugins from a "debug" build.
Member Type Documentation
enum QIviServiceManager::BackendType
| Constant | Value | Description |
|---|---|---|
QIviServiceManager::ProductionBackend | 0 | A backend controlling a real automotive interface (e.g. a climate control connected over the CAN bus) |
QIviServiceManager::SimulationBackend | 1 | A backend used for development as it's only returning simulation values and won't be deployed to the final hardware |
enum QIviServiceManager::Roles
| Constant | Value | Description |
|---|---|---|
QIviServiceManager::NameRole | Qt::DisplayRole | The name of the backend e.g. MediaPlugin |
QIviServiceManager::ServiceObjectRole | Qt::UserRole | The actual QIviServiceObject, which can be used to connect a frontend API to this backend. |
Note: When using this role in the data() function, the backend plugin will be loaded and instantiated.
| Constant | Value | Description |
|---|---|---|
QIviServiceManager::InterfacesRole | Qt::UserRole +1 | A list of interefaces the backend implements. |
enum QIviServiceManager::SearchFlag
flags QIviServiceManager::SearchFlags
| Constant | Value | Description |
|---|---|---|
QIviServiceManager::IncludeProductionBackends | 0x01 | Include production backends in the search result. |
QIviServiceManager::IncludeSimulationBackends | 0x02 | Include simulation backends in the search result. |
QIviServiceManager::IncludeAll | IncludeProductionBackends | IncludeSimulationBackends | Include production and simulation backends in the search result |
The SearchFlags type is a typedef for QFlags<SearchFlag>. It stores an OR combination of SearchFlag values.
See also ProductionBackend and SimulationBackend.
Member Function Documentation
[override virtual] QVariant QIviServiceManager::data(const QModelIndex &index, int role) const
Reimplements: QAbstractItemModel::data(const QModelIndex &index, int role) const.
Returns the data for index and role.
See also QAbstractListModel::data().
QList<QIviServiceObject *> QIviServiceManager::findServiceByInterface(const QString &interface, QIviServiceManager::SearchFlags searchFlags = IncludeAll)
Returns a list of backends implementing the specified interface.
The searchFlags argument can be used to control which type of backends are included in the search result.
Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.
bool QIviServiceManager::hasInterface(const QString &interface) const
Returns true if the specified interface has been registered.
Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.
[static] QIviServiceManager *QIviServiceManager::instance()
Returns the global service manager instance.
bool QIviServiceManager::registerService(QObject *serviceBackendInterface, const QStringList &interfaces, QIviServiceManager::BackendType backendType = ProductionBackend)
Register a backend. The provided serviceBackendInterface must implement the QIviServiceInterface else the registration will fail. interfaces is a list with interfaces (at least one) supported by the backend. The backendType indicates the type of the backend and has influence on whether the backend is found by the auto discovery of the Feature.
Returns true if the backend was successfully registered else false.
See also QIviServiceInterface.
[override virtual] QHash<int, QByteArray> QIviServiceManager::roleNames() const
Reimplements: QAbstractItemModel::roleNames() const.
[override virtual] int QIviServiceManager::rowCount(const QModelIndex &parent = QModelIndex()) const
Reimplements: QAbstractItemModel::rowCount(const QModelIndex &parent) const.
Returns the number of rows for the given parent. Typically parent is an empty model index.
See also QAbstractListModel::data().
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