Initial Commit
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174
MarketData/MarketDataLib/DataAccess/CurrencyConversionDA.cs
Executable file
174
MarketData/MarketDataLib/DataAccess/CurrencyConversionDA.cs
Executable file
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using System;
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using System.Collections.Generic;
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using System.Text;
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using MySql.Data.MySqlClient;
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using MarketData.MarketDataModel;
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using MarketData.Utils;
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namespace MarketData.DataAccess
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{
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public class CurrencyConversionDA
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{
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private CurrencyConversionDA()
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{
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}
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// get the maximum date on record on or before asof. If maxDate turns out to be less than asof then return null
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public static DateTime? GetMaxDateForCurrency(String sourceCurrency,String destinationCurrency,DateTime asof)
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{
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MySqlConnection sqlConnection = null;
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MySqlDataReader sqlDataReader = null;
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MySqlCommand sqlCommand=null;
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String strQuery = null;
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DateTime? maxDate=null;
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try
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{
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StringBuilder sb = new StringBuilder();
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sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
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sb.Append("select asof from CurrencyConversion ");
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sb.Append(" where ");
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sb.Append("source_currency=").Append("'").Append(sourceCurrency).Append("'").Append(" ");
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sb.Append("and ").Append(" destination_currency=").Append("'").Append(destinationCurrency).Append("'").Append(" ");
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sb.Append("and asof<=").Append("'").Append(Utility.DateTimeToStringYYYYHMMHDD(asof)).Append("'");
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sb.Append(" order by asof desc ");
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sb.Append(" limit 1");
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strQuery = sb.ToString(); ;
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sqlCommand = new MySqlCommand(strQuery, sqlConnection);
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sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
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sqlDataReader = sqlCommand.ExecuteReader();
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if (!sqlDataReader.Read()) return maxDate;
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if(!sqlDataReader.IsDBNull(0))maxDate=sqlDataReader.GetDateTime(0);
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if(maxDate<asof)return null;
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return maxDate;
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}
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catch (Exception exception)
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{
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MDTrace.WriteLine(LogLevel.DEBUG,exception);
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return null;
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}
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finally
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{
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if(null!=sqlCommand)sqlCommand.Dispose();
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if (null != sqlDataReader) sqlDataReader.Close();
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if (null != sqlConnection) sqlConnection.Close();
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}
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}
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// Assumes like source_currency and like asof
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public static bool InsertCurrencyConversionRates(CurrencyConversionCollection currencyConversionCollection)
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{
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MySqlConnection sqlConnection=null;
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MySqlTransaction sqlTransaction=null;
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try
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{
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if(null==currencyConversionCollection||0==currencyConversionCollection.Count)return false;
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sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
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sqlTransaction = sqlConnection.BeginTransaction(System.Data.IsolationLevel.ReadCommitted);
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CurrencyConversionElement currencyConversionElementPrimary=currencyConversionCollection[0];
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RemoveCurrecyConversionForSourceAndDate(currencyConversionElementPrimary.SourceCurrency,currencyConversionElementPrimary.AsOf,sqlConnection,sqlTransaction);
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foreach(CurrencyConversionElement currencyConversionElement in currencyConversionCollection)
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{
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StringBuilder sb = new StringBuilder();
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sb.Append("insert into CurrencyConversion(asof,source_currency,destination_currency,destination_currency_name,units_per_source,source_per_unit) ");
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sb.Append("values(");
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sb.Append("'").Append(Utility.DateTimeToStringYYYYHMMHDD(currencyConversionElement.AsOf)).Append("'").Append(",");
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sb.Append("'").Append(currencyConversionElement.SourceCurrency).Append("'").Append(",");
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sb.Append("'").Append(currencyConversionElement.DestinationCurrency).Append("'").Append(",");
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sb.Append("'").Append(currencyConversionElement.DestinationCurrencyName).Append("'").Append(",");
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sb.Append(currencyConversionElement.UnitsPerSource).Append(",");
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sb.Append(currencyConversionElement.SourcePerUnit);
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sb.Append(")");
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String strQuery=sb.ToString();
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MySqlCommand sqlCommand = new MySqlCommand(strQuery, sqlConnection, sqlTransaction);
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sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
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sqlCommand.ExecuteNonQuery();
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sqlCommand.Dispose();
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}
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sqlTransaction.Commit();
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return true;
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}
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catch(Exception exception)
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{
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MDTrace.WriteLine(LogLevel.DEBUG,exception);
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return false;
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}
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finally
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{
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if(null!=sqlTransaction)sqlTransaction.Dispose();
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if (null != sqlConnection) sqlConnection.Close();
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}
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}
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public static bool RemoveCurrecyConversionForSourceAndDate(String sourceCurrency,DateTime asof,MySqlConnection sqlConnection,MySqlTransaction sqlTransaction)
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{
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StringBuilder sb = new StringBuilder();
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String strQuery = null;
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try
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{
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sb.Append("delete from currencyconversion where ");
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sb.Append("source_currency='").Append(sourceCurrency).Append("'");
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sb.Append(" and ");
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sb.Append("asof='").Append(Utility.DateTimeToStringYYYYHMMHDD(asof)).Append("'");
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strQuery = sb.ToString();
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MySqlCommand sqlCommand = new MySqlCommand(strQuery, sqlConnection, sqlTransaction);
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sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
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sqlCommand.ExecuteNonQuery();
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sqlCommand.Dispose();
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return true;
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}
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catch (Exception exception)
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{
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sqlTransaction.Rollback();
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MDTrace.WriteLine(LogLevel.DEBUG,exception);
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if (null != strQuery) MDTrace.WriteLine(LogLevel.DEBUG,"Query was " + strQuery);
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return false;
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}
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finally
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{
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}
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}
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public static CurrencyConversionElement GetCurrencyConversionMaxDate(String sourceCurrency,String destinationCurrency, DateTime asof)
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{
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MySqlConnection sqlConnection = null;
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MySqlDataReader sqlDataReader = null;
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MySqlCommand sqlCommand=null;
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String strQuery = null;
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try
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{
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DateTime? maxDate=GetMaxDateForCurrency(sourceCurrency,destinationCurrency,asof); // get the maximum date on record on or before max date
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if(null==maxDate)return null;
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StringBuilder sb = new StringBuilder();
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sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
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sb.Append("select asof,source_currency,destination_currency,destination_currency_name,units_per_source,source_per_unit from CurrencyConversion where source_currency=");
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sb.Append("'").Append(sourceCurrency).Append("'").Append(" ");
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sb.Append(" and destination_currency=").Append("'").Append(destinationCurrency).Append("'").Append(" ");
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sb.Append("and asof=").Append("'").Append(Utility.DateTimeToStringYYYYHMMHDD(maxDate.Value)).Append("'");
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sb.Append(" limit 1");
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strQuery = sb.ToString(); ;
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sqlCommand = new MySqlCommand(strQuery, sqlConnection);
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sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
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sqlDataReader = sqlCommand.ExecuteReader();
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if (!sqlDataReader.Read()) return null;
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CurrencyConversionElement currencyConversionElement = new CurrencyConversionElement();
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currencyConversionElement.AsOf = sqlDataReader.GetDateTime(0);
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currencyConversionElement.SourceCurrency = sqlDataReader.GetString(1);
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currencyConversionElement.DestinationCurrency = sqlDataReader.GetString(2);
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if (!sqlDataReader.IsDBNull(2)) currencyConversionElement.DestinationCurrencyName = sqlDataReader.GetString(3);
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currencyConversionElement.UnitsPerSource = sqlDataReader.GetDouble(4);
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currencyConversionElement.SourcePerUnit = sqlDataReader.GetDouble(5);
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return currencyConversionElement;
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}
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catch (Exception exception)
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{
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MDTrace.WriteLine(LogLevel.DEBUG,exception);
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return null;
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}
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finally
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{
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if(null!=sqlCommand)sqlCommand.Dispose();
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if (null != sqlDataReader) sqlDataReader.Close();
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if (null != sqlConnection) sqlConnection.Close();
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}
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}
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}
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}
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