Method getInstance

src/main/java/groovy/grape/Grape.java:148–160

Returns the shared grape engine instance. @return the shared engine, or null if grapes are unavailable

()

     * @return the shared engine, or {@code null} if grapes are unavailable
     */
    public static synchronized GrapeEngine getInstance() {
        if (instance == null) {
            String configuredImpl = System.getProperty(GRAPE_IMPL_SYSTEM_PROPERTY);
            ServiceLoader.Provider<GrapeEngine> provider = findProvider(configuredImpl);
            if (provider != null) {
                instance = createEngineFromProvider(provider);
            }
            if (instance == null) {
                LOGGER.log(WARNING, "Grapes disabled");
            }
        }
        return instance;
    }

    private static ServiceLoader.Provider<GrapeEngine> findProvider(final String configuredImpl) {
        List<ServiceLoader.Provider<GrapeEngine>> providers;