The below steps need to be followed by the applications that control the TCU-activity state, to change the TCU-activity state.
### 1. Implement a command response function ###
void commandResponse(ErrorCode error) {
if (error == ErrorCode::SUCCESS) {
std::cout << " Command executed successfully" << std::endl;
} else {
std::cout << " Command failed, errorCode: " << static_cast<int>(error) << std::endl;
}
}
### 2. Implement ITcuActivityListener interface. ###
class MyTcuActivityStateListener : public ITcuActivityListener {
public:
void onTcuActivityStateUpdate(TcuActivityState state) override;
};
### 3. Get the Power-Factory instance ###
auto &powerFactory = PowerFactory::getInstance();
### 4. Get TCU-activity manager instance ###
auto tcuActivityManager = powerFactory.getTcuActivityManager();
### 5. Wait for the TCU-activity management services to be initialized and ready ###
bool isReady = tcuActivityManager->isReady();
if(!isReady) {
std::cout << "TCU-activity management service is not ready" << std::endl;
std::cout << "Waiting uncondotionally for it to be ready " << std::endl;
std::future<bool> f = tcuActivityManager->onReady();
isReady = f.get();
}
### 6. Exit the application, if SDK is unable to initialize TCU-activity management service ###
if(isReady) {
std::cout << " *** TCU-activity management service is Ready *** " << std::endl;
} else {
std::cout << " *** ERROR - Unable to initialize TCU-activity management service" << std::endl;
return 1;
}
### 7. Instantiate MyTcuActivityStateListener ###
auto myTcuStateListener = std::make_shared<MyTcuActivityStateListener>();
### 8. Register for updates on TCU-activity state and its management service status ###
tcuActivityManager->registerListener(myTcuStateListener);
### 9. Set the TCU-activity state ###
tcuActivityManager->setActivityState(state,&commandResponse);
10. Command response callback function is invoked with error code indicating whether the request was SUCCESS or FAILURE
### 11. This API on the listener is invoked to notify that the TCU-activity state is changing to the desired state ###
void MyTcuActivityStateListener::onTcuActivityStateUpdate(TcuActivityState state) {
std::cout << std::endl << "********* TCU-activity state update *********" << std::endl;
}
12. On SUSPEND/SHUTDOWN notification, save any required information and send one(despite multiple listeners) acknowledgement
tcuActivityManager->sendActivityStateAck(TcuActivityStateAck);