private String getDate(String timeStampStr, String format) {
DateFormat formatter = new SimpleDateFormat(format);
long timeStamp = Long.parseLong(timeStampStr);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(timeStamp);
return formatter.format(calendar.getTime());
}
private List<Long> parseUsersIdsFromFile(String listFilePath) throws ServletException {
List<Long> ids = new ArrayList<Long>();
try {
BufferedReader fileReader = new BufferedReader(new FileReader(listFilePath));
String currentLine = fileReader.readLine();
while (currentLine != null) {
LOGGER.debug(currentLine);
long id = Long.parseLong(currentLine);
ids.add(id);
currentLine = fileReader.readLine();
}
fileReader.close();
} catch (FileNotFoundException e) {
String emsg = "cant find file '" + listFilePath + "'";
throw new ServletException(emsg, e);
} catch (IOException e) {
String emsg = "cant read from file '" + listFilePath + "'";
throw new ServletException(emsg, e);
}
return ids;
}
private void setupRoutes() {
get(
"/transactionservice/transaction/:id",
(req, res) -> {
try {
long id = Long.parseLong(req.params(":id"));
Transaction tx = store.getTxById(id);
if (tx == null) {
res.status(HTTP_NOT_FOUND);
return errorUnknownIdBody;
}
return gson.toJson(tx);
} catch (Exception e) {
res.status(HTTP_REQUEST_ERROR);
return errorInvalidBody;
}
});
// Queries for a type will always succeed: If there is no transaction, the (valid) response is
// an empty list.
get(
"/transactionservice/types/:type",
(req, res) -> gson.toJson(store.getTxIdsByType(req.params(":type"))));
get(
"/transactionservice/sum/:id",
(req, res) -> {
try {
long id = Long.parseLong(req.params(":id"));
double sum = store.getSum(id);
JsonObject resJson = new JsonObject();
resJson.addProperty("sum", sum);
return resJson;
} catch (TransactionNotFoundException e) {
res.status(HTTP_NOT_FOUND);
return errorUnknownIdBody;
} catch (Exception e) {
res.status(HTTP_REQUEST_ERROR);
return errorInvalidBody;
}
});
put(
"/transactionservice/transaction/:id",
(req, res) -> {
try {
JsonObject input = (JsonObject) new JsonParser().parse(req.body());
long id = Long.parseLong(req.params(":id"));
double amount = input.get("amount").getAsDouble();
// TODO: Specify and enforce allowed characters in the type string. Currently, all
// strings are valid.
String type = input.get("type").getAsString();
// Parent ID is optional; set to zero if not provided
long parentId = 0L;
if (input.has("parent")) {
parentId = input.get("parent").getAsLong();
}
store.addTx(id, amount, type, parentId);
} catch (DuplicateTransactionException e) {
res.status(HTTP_CONFLICT);
return errorDuplicateBody;
} catch (InvalidParentTransactionException e) {
res.status(HTTP_REQUEST_ERROR);
return errorInvalidParent;
} catch (Exception e) {
// Something else went wrong (e.g. unparseable request format)
res.status(HTTP_REQUEST_ERROR);
return errorInvalidBody;
}
// If everything went OK, the resource has now been created: Return the appropriate HTTP
// status
res.status(HTTP_CREATED);
return okBody;
});
}