// *******************************Uncomment this method and comment out the other to implement AppFabric caching for market summary
/*
/// <summary>
/// Gets the current market summary. This results in an expensive DB query in the DAL; hence look to cache data returned for 60 second or so.
/// </summary>
public MarketSummaryDataModelWS getMarketSummary()
{
// ============ To use WINDOWS SERVER App Fabric Caching (on-premise only): uncomment at top of page 'using Microsoft.ApplicationServer.Caching;'
// Add references to the host program (TradeWebBSL, BusinessServiceHost, BusinessServiceConsole and/or BusinessServiceNTServiceHost project(s):
// \stocktrader\sharedlibraries\winserverappfabric\*.dll (all assemblies in this directory).
// Add reference to: \stocktrader\sharedlibraries\configuration\ConfigService.WinServerAppFabricUtility.dll
//
// ============ To use WINDOWS AZURE App Fabric Caching (on-premise or on-azure): uncomment at top of page 'using Microsoft.ApplicationServer.Caching;'
// Add references to the host program (TradeWebBSL, BusinessServiceHost, BusinessServiceConsole and/or BusinessServiceNTServiceHost project(s):
// \stocktrader\sharedlibraries\winazureappfabric\*.dll (all assemblies in this directory).
// Add reference to: \stocktrader\sharedlibraries\configuration\ConfigService.AzureAppFabricConfigUtility.dll
//This is an example of using ConfigService distributed cache utility to access a Win Server or Win Azure AppFabric cache
//without any cache config info embedded in config. The utility returns a pre-tuned client, already connected to the
//distributed cache so its high performance. First, you must find the cache you want from the Settings.connectedCaches list.
//This list is automatically created based on using ConfigWeb inherited settings to specified connected_caches.
//Note, your app may use as many different caches (namespaces on Azure, or named caches on Win Server) as you want.
//Just add more keys to ConfigSettings (currently, keys are defined for up to three different caches from a single app.
//Also note below, on Azure AppFabric, there is only one named cache 'default'; but you can create many different namespaces,
//hence, many different caches (they will all just be named 'default', but the different namespaces mean they reside om
//different servers (and maybe different geographic regions, depending on how you setup the App Fabric cache namespace(s).
//At any rate, StockTrader as an app does not present a lot of opportunity to use a cache, since most information should not be
//stale to the user. However, market summary is an exception--who cares if updated only every 30 seconds or so? Plus, its an
//expensive query. The below code is for example only. Yo can also use ASP.NET local output caching from the Web app to cache the
//results of the call to this method (or, put in a distributed cache the StockTrader Web app uses. But, it is useful to
//also cache the data here on the Web Service tier itself; since other clients may be calling this method a lot, putting stress
//on the database.
//The differnce between using a local ASP.NET cache vs. a AppFabric distributed cache is one makes sure all nodes/instances in a scale-out
//cluster are using/presenting the exact same data; local .NET caching means nodes will be out of sync. So it depends on the data
//and the scenario on when to use a distributed cache vs. a node-local cache. You can never use a local cache for session data
//in a scale-out scenario: the nodes must be using the same cache.
//Finally, most of the logic below to use the Config Service cache utility could be put into a re-usable method, if an app was going to use the utility in lots of places.
MarketSummaryDataModelWS returnData=null;
DistributedCaches myStockTraderMktSummaryCache=null;
DataCache theCache =null;
//First we need to find the actual cache we are interested in using, the service domain might be using many
//different caches, potentially on different servers/azure namespaces. We will look up by name. However,
//we really should look up by name and Azure namespace, since all Azure AppFabric caches are named 'default.' (as
//of this writing. On-premise, Win Server AppFabric clusters can have named caches with different names/properties.
if (Settings.connectedCaches!=null)
myStockTraderMktSummaryCache = Settings.connectedCaches.Find(delegate (DistributedCaches cacheExists) {return cacheExists.Name.ToLower().Equals("default");});
//Ok, if we have it, keep going. If you have not setup a distributed cache, the logic below simply gets it from the DB
//on every call.
if (myStockTraderMktSummaryCache!=null)
{
//If using the ConfigServer pre-tuned DistributedCacheUtility, make sure to put the getDataCache call in a try-catch,
//and call closeDataCache on an exception. An exception can happen if for any reason the
//cache connection from the client was broken. The closeDataCache method ensure the cache is
//disposed of, a new factory created and new connection established on any subsequent calls.
try
{
theCache = (DataCache)DistributedCacheUtility.getDataCache(myStockTraderMktSummaryCache, false, new Settings());
returnData = (MarketSummaryDataModelWS)theCache.Get("mktSummary");
}
catch
{
DistributedCacheUtility.closeDataCache(myStockTraderMktSummaryCache, new Settings());
}
}
//Ok, it was either not in the cache, or the cache was offline--so we must go get it from the DB. And then stuff
//it into the cache so next caller does not have to goto the DB.
if (returnData == null)
{
dalMarketSummary = Trade.DALFactory.MarketSummary.Create(Settings.DAL);
dalMarketSummary.Open(Settings.TRADEDB_SQL_CONN_STRING);
try
{
returnData = dalMarketSummary.getMarketSummaryData();
if (theCache != null && returnData!=null)
try
{
theCache.Put("mktSummary", returnData, new TimeSpan(0,0,60));
}
catch (Exception ePut)
{
ConfigUtility.writeConfigConsoleMessage("Warning: a cache put operation failed.\n\n" + ePut.ToString(), System.Diagnostics.EventLogEntryType.Warning, true, new Settings());
}
}
catch
{
throw;
}
finally
{
dalMarketSummary.Close();
}
}
return returnData;
}
* */
/// <summary>
/// Gets a single quote based on symbol.
/// </summary>
/// <param name="symbol">Symbol to get data for.</param>
public QuoteDataModel getQuote(string symbol)
{
dalMarketSummary = Trade.DALFactory.MarketSummary.Create(Settings.DAL);
dalMarketSummary.Open(Settings.TRADEDB_SQL_CONN_STRING);
try
{
return dalMarketSummary.getQuote(symbol);
}
catch
{
throw;
}
finally
{
dalMarketSummary.Close();
}
}
/// <summary>
/// Gets a quotes based on symbols string.
/// </summary>
/// <param name="symbol">Symbol to get data for.</param>
public List<QuoteDataModel> getQuotes(string symbols)
{
dalMarketSummary = Trade.DALFactory.MarketSummary.Create(Settings.DAL);
dalMarketSummary.Open(Settings.TRADEDB_SQL_CONN_STRING);
try
{
string[] quotes = symbols.Split(new char[] { ' ', ',', ';' });
List<QuoteDataModel> quoteList = new List<QuoteDataModel>();
foreach (string quote in quotes)
{
string stringquotetrim = quote.Trim();
if (!stringquotetrim.Equals(""))
{
QuoteDataModel quoteData = dalMarketSummary.getQuote(stringquotetrim);
if (quoteData != null)
{
quoteList.Add(quoteData);
}
}
}
return quoteList;
}
catch
{
throw;
}
finally
{
dalMarketSummary.Close();
}
}
/// <summary>
/// Gets the current market summary. This results in an expensive DB query in the DAL; hence look to cache data returned for 60 second or so.
/// </summary>
public MarketSummaryDataModelWS getMarketSummary()
{
MarketSummaryDataModelWS returnData=null;
dalMarketSummary = Trade.DALFactory.MarketSummary.Create(Settings.DAL);
dalMarketSummary.Open(Settings.TRADEDB_SQL_CONN_STRING);
try
{
returnData = dalMarketSummary.getMarketSummaryData();
}
catch
{
throw;
}
finally
{
dalMarketSummary.Close();
}
return returnData;
}
