public void updateDailyExchangeRateTable(
CurrencyPair currencyPair, List<ExchangeRate> exchangeRates)
throws CantSaveExchangeRateException {
List<String> exchangeRateTimestampsInDatabase = new ArrayList<>();
DatabaseTable table =
this.database.getTable(
BitcoinVenezuelaProviderDatabaseConstants.DAILY_EXCHANGE_RATES_TABLE_NAME);
table.addStringFilter(
BitcoinVenezuelaProviderDatabaseConstants.DAILY_EXCHANGE_RATES_FROM_CURRENCY_COLUMN_NAME,
currencyPair.getFrom().getCode(),
DatabaseFilterType.EQUAL);
table.addStringFilter(
BitcoinVenezuelaProviderDatabaseConstants.DAILY_EXCHANGE_RATES_TO_CURRENCY_COLUMN_NAME,
currencyPair.getTo().getCode(),
DatabaseFilterType.EQUAL);
try {
table.loadToMemory();
for (DatabaseTableRecord record : table.getRecords()) {
String timestamp =
record.getStringValue(
BitcoinVenezuelaProviderDatabaseConstants
.DAILY_EXCHANGE_RATES_TIMESTAMP_COLUMN_NAME);
exchangeRateTimestampsInDatabase.add(timestamp);
}
} catch (CantLoadTableToMemoryException e) {
throw new CantSaveExchangeRateException(
CantSaveExchangeRateException.DEFAULT_MESSAGE,
e,
"Failed to get ExchangeRates in database for CurrencyPair: " + currencyPair.toString(),
"Couldn't load table to memory");
}
for (ExchangeRate e : exchangeRates) {
String currentTimestamp = String.valueOf(e.getTimestamp());
if (!exchangeRateTimestampsInDatabase.contains(currentTimestamp)) {
this.saveDailyExchangeRate(e); // TODO: improve this.. saving one by one..
}
}
}
public List<ExchangeRate> getQueriedExchangeRateHistory(
ExchangeRateType exchangeRateType, CurrencyPair currencyPair)
throws CantGetExchangeRateException {
List<ExchangeRate> exchangeRateList = new ArrayList<>();
DatabaseTable table = null;
switch (exchangeRateType) {
case CURRENT:
table =
this.database.getTable(
BitcoinVenezuelaProviderDatabaseConstants.CURRENT_EXCHANGE_RATES_TABLE_NAME);
table.addStringFilter(
BitcoinVenezuelaProviderDatabaseConstants
.CURRENT_EXCHANGE_RATES_FROM_CURRENCY_COLUMN_NAME,
currencyPair.getFrom().getCode(),
DatabaseFilterType.EQUAL);
table.addStringFilter(
BitcoinVenezuelaProviderDatabaseConstants
.CURRENT_EXCHANGE_RATES_TO_CURRENCY_COLUMN_NAME,
currencyPair.getTo().getCode(),
DatabaseFilterType.EQUAL);
break;
case DAILY:
table =
this.database.getTable(
BitcoinVenezuelaProviderDatabaseConstants.DAILY_EXCHANGE_RATES_TABLE_NAME);
table.addStringFilter(
BitcoinVenezuelaProviderDatabaseConstants
.DAILY_EXCHANGE_RATES_FROM_CURRENCY_COLUMN_NAME,
currencyPair.getFrom().getCode(),
DatabaseFilterType.EQUAL);
table.addStringFilter(
BitcoinVenezuelaProviderDatabaseConstants.DAILY_EXCHANGE_RATES_TO_CURRENCY_COLUMN_NAME,
currencyPair.getTo().getCode(),
DatabaseFilterType.EQUAL);
break;
}
try {
table.loadToMemory();
for (DatabaseTableRecord record : table.getRecords()) {
ExchangeRate exchangeRate = constructExchangeRateFromRecord(record);
exchangeRateList.add(exchangeRate);
}
} catch (CantLoadTableToMemoryException e) {
throw new CantGetExchangeRateException(
CantGetExchangeRateException.DEFAULT_MESSAGE,
e,
"Failed to get History for currencyPair: " + currencyPair.toString(),
"Couldn't load table to memory");
} catch (CantCreateExchangeRateException e) {
throw new CantGetExchangeRateException(
CantGetExchangeRateException.DEFAULT_MESSAGE,
e,
"Failed to get History for currencyPair: " + currencyPair.toString(),
"Couldn't create ExchangeRate object");
}
return exchangeRateList;
}