bp3_graphql_server.java

private Map<String, Object> graphql(Request request, 
                                    Response response) {
  Map<String, Object> payload;
  payload = getMapper().readValue(request.body(), Map.class);
  Map<String,Object> variables = 
    (Map<String, Object>) payload.get("variables");
  ExecutionResult executionResult = 
    graphql.execute(payload.get("query").toString(), null, null, variables);
  Map<String, Object> result = new LinkedHashMap<>();
  if (executionResult.getErrors().size() > 0) {
    result.put("errors", executionResult.getErrors());
  }
  result.put("data", executionResult.getData());
  response.type("application/json");
  return result;
}