/// <summary>Loads a Country record using Metadata Parameters.</summary> /// <param name="transaction">Contains the parameters and exceptions for this command.</param> public static void Load(ParameterList parameters) { // Accessor for the Country Table. ServerMarketData.CountryDataTable countryTable = ServerMarketData.Country; // Extract the parameters from the command batch. AdoTransaction adoTransaction = parameters["adoTransaction"]; SqlTransaction sqlTransaction = parameters["sqlTransaction"]; object configurationId = parameters["configurationId"].Value; string abbreviation = parameters["abbreviation"]; object externalCountryId = parameters["countryId"].Value; object externalId0 = parameters["externalId0"].Value; object externalId1 = parameters["externalId1"].Value; string name = parameters["name"]; // The row versioning is largely disabled for external operations. The value is returned to the caller in the // event it's needed for operations within the batch. long rowVersion = long.MinValue; // Resolve External Identifiers int countryId = Country.FindKey(configurationId, "countryId", externalCountryId); // The load operation will create a record if it doesn't exist, or update an existing record. The external // identifier is used to determine if a record exists with the same key. if ((countryId == int.MinValue)) { // Populate the 'externalId' varaibles so that the external identifier can be used to find the row when an // external method is called with the same 'configurationId' parameter. int externalKeyIndex = Country.GetExternalKeyIndex(configurationId, "countryId"); object[] externalIdArray = new object[2]; externalIdArray[externalKeyIndex] = externalCountryId; externalId0 = externalIdArray[0]; externalId1 = externalIdArray[1]; // Call the internal method to complete the operation. MarkThree.Guardian.Core.Country.Insert(adoTransaction, sqlTransaction, ref rowVersion, abbreviation, externalId0, externalId1, name); } else { // While the optimistic concurrency checking is disabled for the external methods, the internal methods // still need to perform the check. This ncurrency checking logic by finding the current row version to be // will bypass the coused when the internal method is called. ServerMarketData.CountryRow countryRow = countryTable.FindByCountryId(countryId); rowVersion = ((long)(countryRow[countryTable.RowVersionColumn])); // Call the internal method to complete the operation. MarkThree.Guardian.Core.Country.Update(adoTransaction, sqlTransaction, ref rowVersion, abbreviation, countryId, externalId0, externalId1, name); } // Return values. parameters["rowVersion"] = rowVersion; }
/// <summary>Finds a a Country record using a configuration and an external identifier.</summary> /// <param name="configurationId">Specified which mappings (user id columns) to use when looking up external identifiers.</param> /// <param name="parameterId">The name of the parameter as specified in the configuration table.</param> /// <param name="externalId">The external (user supplied) identifier for the record.</param> public static int FindKey(object configurationId, string parameterId, object externalId) { // A missing key will never match a column. if ((externalId == null)) { return int.MinValue; } // Accessor for the Country Table. ServerMarketData.CountryDataTable countryTable = ServerMarketData.Country; // Look for the record using the external identifier. The configuration selected the key to use, which effectively // selected the external id column to use for the search. If a record is found in the view, a translation still needs // to be made back to the original table before an index to the record can be returned to the caller. int externalKeyIndex = Country.GetExternalKeyIndex(configurationId, parameterId); System.Data.DataView externalKeyView = Country.externalKeyArray[externalKeyIndex]; int recordIndex = externalKeyView.Find(new object[] { externalId}); if ((recordIndex == -1)) { return int.MinValue; } return ((int)(externalKeyView[recordIndex].Row[countryTable.CountryIdColumn])); }