@Override
  public void identify(IdentifyPayload identify) {
    super.identify(identify);

    String userId = identify.userId();
    amplitude.setUserId(userId);
    log.verbose("AmplitudeClient.getInstance().setUserId(%s);", userId);

    JSONObject traits = identify.traits().toJsonObject();
    amplitude.setUserProperties(traits);
    log.verbose("AmplitudeClient.getInstance().setUserProperties(%s);", traits);
  }
  @Override
  public void flush() {
    super.flush();

    amplitude.uploadEvents();
    log.verbose("AmplitudeClient.getInstance().uploadEvents();");
  }
  @Override
  public void initialize(Analytics analytics, ValueMap settings) throws IllegalStateException {
    log = analytics.getLogger().newLogger(AMPLITUDE_KEY);

    trackAllPages = settings.getBoolean("trackAllPages", false);
    trackCategorizedPages = settings.getBoolean("trackCategorizedPages", false);
    trackNamedPages = settings.getBoolean("trackNamedPages", false);
    boolean trackSessionEvents = settings.getBoolean("trackSessionEvents", false);
    String apiKey = settings.getString("apiKey");

    amplitude = provider.get();
    amplitude.initialize(analytics.getApplication(), apiKey);
    log.verbose("AmplitudeClient.getInstance().initialize(context, %s);", apiKey);
    amplitude.enableForegroundTracking(analytics.getApplication());
    log.verbose("AmplitudeClient.getInstance().enableForegroundTracking(context);");
    amplitude.trackSessionEvents(trackSessionEvents);
    log.verbose("AmplitudeClient.getInstance().trackSessionEvents(%s);", trackSessionEvents);
  }
  private void event(String name, Properties properties) {
    JSONObject propertiesJSON = properties.toJsonObject();
    amplitude.logEvent(name, propertiesJSON);
    log.verbose("AmplitudeClient.getInstance().logEvent(%s, %s);", name, propertiesJSON);

    double revenue = properties.getDouble("revenue", -1);
    if (revenue == -1) {
      return;
    }
    String productId = properties.getString("productId");
    int quantity = properties.getInt("quantity", 0);
    String receipt = properties.getString("receipt");
    String receiptSignature = properties.getString("receiptSignature");
    amplitude.logRevenue(productId, quantity, revenue, receipt, receiptSignature);
    log.verbose(
        "AmplitudeClient.getInstance().logRevenue(%s, %s, %s, %s, %s);",
        productId, quantity, revenue, receipt, receiptSignature);
  }
 @Override
 public AmplitudeClient get() {
   return AmplitudeClient.getInstance();
 }