Function Start

doc/src/tutorial/spellcheckclient/Activator.cpp:67–124

* Implements BundleActivator::Start(). Creates a service * tracker object to monitor spell checker services. Enters * a spell check loop where it reads passages from standard * input and checks their spelling using the spell checker service. * * \note It is very bad practice to use the calling thread to perform a * lengthy process like th

         * @param context the bundle context for this bundle.
         */
        void
        Start(BundleContext context)
        {
            m_context = context;

            // Create a service tracker to monitor spell check services.
            m_tracker = new ServiceTracker<ISpellCheckService>(m_context);
            m_tracker->Open();

            // std::cout << "Tracker count is :" << m_tracker->GetTrackingCount() << std::endl;
            std::cout << "Enter a blank line to exit." << std::endl;

            // Loop endlessly until the user enters a blank line
            while (std::cin)
            {
                // Ask the user to enter a passage.
                std::cout << "Enter passage: ";

                std::string passage;
                std::getline(std::cin, passage);

                // Get the selected spell check service, if available.
                std::shared_ptr<ISpellCheckService> checker = m_tracker->GetService();

                // If the user entered a blank line, then
                // exit the loop.
                if (passage.empty())
                {
                    break;
                }
                // If there is no spell checker, then say so.
                else if (checker == nullptr)
                {
                    std::cout << "No spell checker available." << std::endl;
                }
                // Otherwise check passage and print misspelled words.
                else
                {
                    std::vector<std::string> errors = checker->Check(passage);

                    if (errors.empty())
                    {
                        std::cout << "Passage is correct." << std::endl;
                    }
                    else
                    {
                        std::cout << "Incorrect word(s):" << std::endl;
                        for (std::size_t i = 0; i < errors.size(); ++i)
                        {
                            std::cout << "    " << errors[i] << std::endl;
                        }
                    }
                }
            }

            // This automatically closes the tracker
            delete m_tracker;
        }