/// <summary>
/// synchroniously updates <see cref="CoinListing"/> repository with data from server.
/// </summary>
public void UpdateRepository()
{
try
{
CoinListing[] coinListingArray = CMCRequestHandler.RequestCoinListings();
// update id-to-CoinListing, name-to-CoinListing, symbol-to-CoinListing dictionaries
for (int i = 0; i < coinListingArray.Length; i++)
{
CoinListing curCoinListing = coinListingArray[i];
// get CoinListing fields in lowercase
int id = curCoinListing.Id;
string lowercaseName = curCoinListing.Name.ToLower();
string lowercaseSymbol = curCoinListing.Symbol.ToLower();
// update dictionaries
coinIdToCoinListing[id] = curCoinListing;
coinNameToCoinListing[lowercaseName] = curCoinListing;
coinSymbolToCoinListing[lowercaseSymbol] = curCoinListing;
}
}
catch (DataRequestException dataRequestException) // request unsuccessful
{
throw new RepositoryUpdateException(dataRequestException);
}
}
/// <summary>
/// if <see cref="coinTickerUpdateThreadRunning"/> is true,
/// updates <see cref="CoinTickerRequestMaxNumberOfCoins"/> least recently updated
/// <see cref="CoinTicker"/>s in repository.
/// </summary>
/// <seealso cref="RequestHandler.RequestCoinTicker(int, int, eSortType)"/>
/// <seealso cref="handleCoinTickerRepositoryUpdateException(DataRequestException)"/>
private void coinTickerUpdateTask_Target()
{
while (repositoryUpdateThreadRunning)
{
try
{
// fetch data of current coin section
CoinTicker[] currentCoinTickerSection = CMCRequestHandler.RequestCoinTicker(
leastRecentlyUpdatedCoinIndex,
CoinTickerRequestMaxNumberOfCoins);
// update appropriate section in coin data array with newly fetched data
int currentCoinDataSectionSize = Math.Min(
NumberOfCoinsInRepository - leastRecentlyUpdatedCoinIndex,
currentCoinTickerSection.Length);
// overwrite corresponding old CoinTickers in coinId-to-CoinTicker dictionary
foreach (CoinTicker coinTicker in currentCoinTickerSection)
{
coinIdToCoinTicker[coinTicker.Id] = coinTicker;
}
// calculate range of updated coin IDs
int lowerBound = leastRecentlyUpdatedCoinIndex;
int upperBound = leastRecentlyUpdatedCoinIndex + currentCoinDataSectionSize - 1;
Range updatedCoinIdRange = new Range(lowerBound, upperBound);
// raise repository update event
onRepositoryUpdated(updatedCoinIdRange);
// set start index of next coin section (0 if current update run is complete)
leastRecentlyUpdatedCoinIndex += currentCoinTickerSection.Length;
if (leastRecentlyUpdatedCoinIndex > NumberOfCoinsInRepository - 1)
{
leastRecentlyUpdatedCoinIndex = 0;
}
if (leastRecentlyUpdatedCoinIndex == 0) // current update run is complete
{
// if repository was not yet initialized, raise repository initialized event
if (!repositoryInitialized)
{
repositoryInitialized = true;
onRepositoryInitialized();
}
else // notify user that update run is complete
{
ConsoleIOManager.Instance.LogNotice(
"Coin ticker repository updated.",
ConsoleIOManager.eOutputReportType.System);
}
// wait until next update run
Task.Delay(COIN_TICKER_UPDATE_DELAY_TIME_UNTIL_NEXT_RUN).Wait();
}
}
// exception while requesting CoinTicker data from server
catch (DataRequestException dataRequestException)
{
handleCoinTickerRepositoryUpdateException(dataRequestException);
try
{
Task.Delay(COIN_TICKER_UPDATE_DELAY_TIME_AFTER_EXCEPTION).Wait();
}
catch (AggregateException) // thrown by Task.Delay(int).wait()
{
}
}
catch (AggregateException) // thrown by Task.Delay(int).wait()
{
}
}
}
