public void handle()

in src/main/java/org/apache/datasketches/server/BaseSketchesQueryHandler.java [107:155]
38 lines of code
10 McCabe index (conditional complexity)

  public void handle(final String target,
                     final Request baseRequest,
                     final HttpServletRequest request,
                     final HttpServletResponse response) throws IOException {
    JsonElement query = null;
    if (!queryExempt && ((query = checkMethodAndReadJson(baseRequest, request, response)) == null)) {
      return;
    }

    // error messages will be wrapped in json
    response.setCharacterEncoding("utf-8");
    response.setContentType("application/json");

    JsonElement result = null;

    try {
      if (query == null) {
        result = processQuery(null);
      } else if (query.isJsonArray()) {
        for (final JsonElement subQuery : query.getAsJsonArray()) {
          final JsonObject subResult = processQuery(subQuery.getAsJsonObject());
          if (subResult != null) {
            // lazy initialization to avoid possibly empty array
            if (result == null) {
              result = new JsonArray(((JsonArray) query).size());
            }
            ((JsonArray) result).add(subResult);
          }
        }
      } else {
        //result = callProcessQuery((JsonObject) query);
        result = processQuery((JsonObject) query);
      }

      if (result != null) {
        //response.getWriter().print(result.toString());
        response.getWriter().print(new GsonBuilder().setPrettyPrinting().create().toJson(result));
      }

      // we're ok if we reach here without an exception
      response.setStatus(HttpServletResponse.SC_OK);
    } catch (final Exception e) {
      final JsonObject error = new JsonObject();
      error.addProperty(ERROR_KEY, e.getMessage());
      response.setStatus(UNPROCESSABLE_ENTITY);
    }

    baseRequest.setHandled(true);
  }