SendGrid StackMob - query datastore

gistfile1.java

JSONParser parser = new JSONParser();

try {
  Object obj = parser.parse(request.getBody());
  JSONObject jsonObject = (JSONObject) obj;

  //We use the username passed to query the StackMob datastore
  //and retrieve the user's name and email address
  username = (String) jsonObject.get("username");

  // The following values could be static or dynamic
  subject = (String) jsonObject.get("subject");
  text = (String) jsonObject.get("text");
  from = (String) jsonObject.get("from");
} catch (ParseException e) {
  logger.error(e.getMessage(), e);
  responseCode = -1;
  responseBody = e.getMessage();
}
	
if (username == null || username.isEmpty()) {
    HashMap<String, String> errParams = new HashMap<String, String>();
    errParams.put("error", "the username passed was empty or null");
    return new ResponseToProcess(HttpURLConnection.HTTP_BAD_REQUEST, errParams); // http 400 - bad request
}
    	
// get the StackMob datastore service and assemble the query
DataService dataService = serviceProvider.getDataService();
    	 
// build a query
List<SMCondition> query = new ArrayList<SMCondition>();
query.add(new SMEquals("username", new SMString(username)));

SMObject userObject;
    
List<SMObject> result;
try {
  // return results from user query
  result = dataService.readObjects("user", query);
  if (result != null && result.size() == 1) {
    userObject = result.get(0);
    to = userObject.getValue().get("email").toString();
    toname = userObject.getValue().get("name").toString();
  } else {
    HashMap<String, String> errMap = new HashMap<String, String>();
    errMap.put("error", "no user found");
    errMap.put("detail", "no matches for the username passed");
    return new ResponseToProcess(HttpURLConnection.HTTP_OK, errMap); // http 500 - internal server error
  }      
} catch (InvalidSchemaException e) {
    ...
}