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refactor: add strong types to public API (#414)

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This introduces strong types for `std::string`-based D-Bus types. This facilitates safer, less error-prone and more expressive API.

What previously was `auto proxy = createProxy("org.sdbuscpp.concatenator", "/org/sdbuscpp/concatenator");` is now written like `auto proxy = createProxy(ServiceName{"org.sdbuscpp.concatenator"}, ObjectPath{"/org/sdbuscpp/concatenator"});`.

These types are:
  * `ObjectPath` type for the object path (the type has been around already but now is also used consistently in sdbus-c++ API for object path strings),
  * `InterfaceName` type for D-Bus interface names,
  * `BusName` (and its aliases `ServiceName` and `ConnectionName`) type for bus/service/connection names,
  * `MemberName` (and its aliases `MethodName`, `SignalName` and `PropertyName`) type for D-Bus method, signal and property names,
  * `Signature` type for the D-Bus signature (the type has been around already but now is also used consistently in sdbus-c++ API for signature strings),
  * `Error::Name` type for D-Bus error names.
This commit is contained in:
Stanislav Angelovič
2024-04-24 20:20:29 +02:00
parent fe21ee9656
commit 42f0bd07c0
60 changed files with 1085 additions and 621 deletions
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examples/org.freedesktop.DBus.ObjectManager/obj-manager-client.cpp
+15 -14
View File
@@ -17,7 +17,7 @@
class PlanetProxy final : public sdbus::ProxyInterfaces< org::sdbuscpp::ExampleManager::Planet1_proxy >
{
public:
PlanetProxy(sdbus::IConnection& connection, std::string destination, std::string path)
PlanetProxy(sdbus::IConnection& connection, sdbus::ServiceName destination, sdbus::ObjectPath path)
: ProxyInterfaces(connection, std::move(destination), std::move(path))
{
registerProxy();
@@ -29,13 +29,13 @@ public:
}
};
class ManagerProxy final : public sdbus::ProxyInterfaces< sdbus::ObjectManager_proxy >
class ManagerProxy final : public sdbus::ProxyInterfaces<sdbus::ObjectManager_proxy>
{
public:
ManagerProxy(sdbus::IConnection& connection, const std::string& destination, std::string path)
: ProxyInterfaces(connection, destination, std::move(path))
, m_connection(connection)
, m_destination(destination)
ManagerProxy(sdbus::IConnection& connection, sdbus::ServiceName destination, sdbus::ObjectPath path)
: ProxyInterfaces(connection, destination, std::move(path))
, m_connection(connection)
, m_destination(destination)
{
registerProxy();
}
@@ -47,8 +47,7 @@ public:
void handleExistingObjects()
{
std::map<sdbus::ObjectPath, std::map<std::string, std::map<std::string, sdbus::Variant>>> objectsInterfacesAndProperties;
objectsInterfacesAndProperties = GetManagedObjects();
auto objectsInterfacesAndProperties = GetManagedObjects();
for (const auto& [object, interfacesAndProperties] : objectsInterfacesAndProperties) {
onInterfacesAdded(object, interfacesAndProperties);
}
@@ -56,7 +55,7 @@ public:
private:
void onInterfacesAdded( const sdbus::ObjectPath& objectPath
, const std::map<std::string, std::map<std::string, sdbus::Variant>>& interfacesAndProperties) override
, const std::map<sdbus::InterfaceName, std::map<sdbus::PropertyName, sdbus::Variant>>& interfacesAndProperties) override
{
std::cout << objectPath << " added:\t";
for (const auto& [interface, _] : interfacesAndProperties) {
@@ -71,14 +70,14 @@ private:
}
const auto& properties = planetInterface->second;
// get a property which was passed as part of the signal.
const auto& name = properties.at("Name").get<std::string>();
const auto& name = properties.at(sdbus::PropertyName{"Name"}).get<std::string>();
// or create a proxy instance to the newly added object.
PlanetProxy planet(m_connection, m_destination, objectPath);
std::cout << name << " has a population of " << planet.GetPopulation() << ".\n" << std::endl;
}
void onInterfacesRemoved( const sdbus::ObjectPath& objectPath
, const std::vector<std::string>& interfaces) override
, const std::vector<sdbus::InterfaceName>& interfaces) override
{
std::cout << objectPath << " removed:\t";
for (const auto& interface : interfaces) {
@@ -88,14 +87,16 @@ private:
}
sdbus::IConnection& m_connection;
std::string m_destination;
sdbus::ServiceName m_destination;
};
int main()
{
auto connection = sdbus::createSessionBusConnection();
auto managerProxy = std::make_unique<ManagerProxy>(*connection, "org.sdbuscpp.examplemanager", "/org/sdbuscpp/examplemanager");
sdbus::ServiceName destination{"org.sdbuscpp.examplemanager"};
sdbus::ObjectPath objectPath{"/org/sdbuscpp/examplemanager"};
auto managerProxy = std::make_unique<ManagerProxy>(*connection, std::move(destination), std::move(objectPath));
try {
managerProxy->handleExistingObjects();
}
@@ -107,4 +108,4 @@ int main()
connection->enterEventLoop();
return 0;
}
}