public async Task OnDomainEventAsync(IDomainEventingContext context, TransferTransactionStartedDomainEvent @event, CancellationToken token = default)
{
var insertWithdrawSql = $"INSERT INTO `{Tables.AccountOutTransactions}` (`Id`, `Type`, `AccountId`, `AccountName`, `Bank`, `Amount`, `Status`, `Creator`, `CreatedTimestamp`) VALUES (@TransactionId, @Type, @AccountId, @AccountName, @Bank, @amount, @Status, @Creator, @CreatedTimestamp);";
var insertDepositSql = $"INSERT INTO `{Tables.AccountInTransactions}` (`Id`, `Type`, `AccountId`, `AccountName`, `Bank`, `Amount`, `Status`, `Creator`, `CreatedTimestamp`) VALUES (@TransactionId, @Type, @AccountId, @AccountName, @Bank, @amount, @Status, @Creator, @CreatedTimestamp);";
await _db.ExecuteAsync(insertWithdrawSql, new
{
TransactionId = @event.AggregateRootId.Id,
Type = AccountTransactionType.Transfer.ToString(),
AccountId = @event.SourceAccount.Id.Id,
AccountName = @event.SourceAccount.Name.Name,
Bank = @event.SourceAccount.Bank.Name,
Amount = @event.Money.Amount,
Status = TransferTransactionStatus.Started.ToString(),
Creator = "justmine",
CreatedTimestamp = @event.Timestamp
}, token);
await _db.ExecuteAsync(insertDepositSql, new
{
TransactionId = @event.AggregateRootId.Id,
Type = AccountTransactionType.Transfer.ToString(),
AccountId = @event.SinkAccount.Id.Id,
AccountName = @event.SinkAccount.Name.Name,
Bank = @event.SinkAccount.Bank.Name,
Amount = @event.Money.Amount,
Status = TransferTransactionStatus.Started.ToString(),
Creator = "justmine",
CreatedTimestamp = @event.Timestamp
}, token);
}
public async Task OnDomainEventAsync(IDomainEventingContext context, AccountOpenedDomainEvent @event, CancellationToken token = default)
{
var sql = $"INSERT INTO `{Tables.BankAccounts}` (`Id`, `Name`, `Bank`, `Balance`, `Creator`, `CreatedTimestamp`) VALUES (@Id, @Name, @Bank, @Balance, @Creator, @CreatedTimestamp);";
var parameter = new
{
Id = @event.AggregateRootId.Id,
Name = @event.AccountName.Name,
Bank = @event.Bank.Name,
Balance = @event.InitialBalance.Amount,
Creator = "justmine",
CreatedTimestamp = @event.Timestamp
};
await _db.ExecuteAsync(sql, parameter, token);
}
public async Task <AggregateRootCheckpointResult> AppendAsync(
AggregateRootCheckpoint <TPayload> checkpoint,
CancellationToken token = default)
{
PreConditions.NotNull(checkpoint, nameof(checkpoint));
PreConditions.NotNullOrEmpty(checkpoint.AggregateRootId, nameof(checkpoint.AggregateRootId));
PreConditions.NotNull(checkpoint.AggregateRootType, nameof(checkpoint.AggregateRootType));
PreConditions.Nonnegative(checkpoint.AggregateRootGeneration, nameof(checkpoint.AggregateRootGeneration));
PreConditions.Nonnegative(checkpoint.AggregateRootVersion, nameof(checkpoint.AggregateRootVersion));
var record = AggregateRootCheckpointRecordPortAdapter.ToRecord(checkpoint, _binarySerializer);
var parameters = DbParameterProvider.ReflectionParameters(record);
var tables = _options.Tables.DomainModelOptions;
var insertCheckpointIndexSql = $"INSERT INTO `{tables.AggregateRootCheckpointIndices}`(`AggregateRootId`,`AggregateRootType`,`AggregateRootVersion`,`AggregateRootGeneration`,`CreatedTimestamp`) VALUES(@AggregateRootId,@AggregateRootType,@AggregateRootVersion,@AggregateRootGeneration,@CreatedTimestamp)";
var insertCheckpointSql = $"INSERT INTO `{tables.AggregateRootCheckpoints}`(`AggregateRootId`,`Payload`) VALUES (@AggregateRootId,@Payload)";
var maxNumErrorTries = 3;
var maxExecutionTime = TimeSpan.FromSeconds(3);
var expectedRows = 2;
bool ErrorFilter(Exception exc, int attempt)
{
if (exc is MySqlException inner &&
inner.HasDuplicateEntry())
{
_logger.LogWarning($"{record.AggregateRootType}: [Ignored]find duplicated aggregate root checkpoint from mysql state backend：{inner.Message}.");
return(false);
}
_logger.LogError($"Append aggregate root checkpoint has unknown exception: {LogFormatter.PrintException(exc)}.");
return(true);
}
var affectedRows = await AsyncExecutorWithRetries.ExecuteWithRetriesAsync(async attempt =>
{
return(await _db.ExecuteAsync(
$"{insertCheckpointIndexSql};{insertCheckpointSql};",
command => command.Parameters.AddRange(parameters),
token));
}, maxNumErrorTries, ErrorFilter, maxExecutionTime).ConfigureAwait(false);
if (affectedRows != expectedRows)
{
return(AggregateRootCheckpointResult.StorageFailed(record.AggregateRootId,
$"The affected rows returned MySql state backend is incorrect when append aggregate root checkpoint, expected: {expectedRows}, actual: {affectedRows}."));
}
return(AggregateRootCheckpointResult.StorageSucceed(record.AggregateRootId));
}
public async Task <DomainEventResult> AppendAsync(
IDomainEvent @event,
CancellationToken token = default)
{
if ([email protected]())
{
return(DomainEventResult.StorageFailed(@event.Id, $"The domain event: [{@event.Print()}] cannot be stored mysql state backend."));
}
var domainEventRecord = DomainEventRecordPortAdapter.ToDomainEventRecord(@event, _binarySerializer);
var parameters = DbParameterProvider.ReflectionParameters(domainEventRecord);
var tables = _options.Tables.DomainEventOptions;
var insertDomainEventIndexSql = $"INSERT INTO `{tables.DomainEventIndices}`(`DomainCommandId`,`DomainCommandType`,`DomainCommandVersion`,`AggregateRootId`,`AggregateRootType`,`AggregateRootVersion`,`AggregateRootGeneration`,`DomainEventId`,`DomainEventType`,`DomainEventVersion`,`DomainEventPayloadBytes`,`CreatedTimestamp`) VALUES(@DomainCommandId,@DomainCommandType,@DomainCommandVersion,@AggregateRootId,@AggregateRootType,@AggregateRootVersion,@AggregateRootGeneration,@DomainEventId,@DomainEventType,@DomainEventVersion,@DomainEventPayloadBytes,@CreatedTimestamp)";
var insertDomainEventSql = $"INSERT INTO `{tables.DomainEvents}`(`DomainEventId`,`Payload`) VALUES (@DomainEventId,@Payload)";
var maxNumErrorTries = 3;
var maxExecutionTime = TimeSpan.FromSeconds(3);
var expectedRows = 2;
bool ErrorFilter(Exception exc, int attempt)
{
if (exc is MySqlException inner &&
inner.HasDuplicateEntry())
{
_logger.LogWarning($"{domainEventRecord.AggregateRootType}: [Ignored]find duplicated domain event from mysql state backend：{inner.Message}.");
return(false);
}
_logger.LogError($"Append domain event has unknown exception: {LogFormatter.PrintException(exc)}.");
return(true);
}
var affectedRows = await AsyncExecutorWithRetries.ExecuteWithRetriesAsync(async attempt =>
{
return(await _db.ExecuteAsync(
$"{insertDomainEventIndexSql};{insertDomainEventSql};",
command => command.Parameters.AddRange(parameters),
token));
}, maxNumErrorTries, ErrorFilter, maxExecutionTime).ConfigureAwait(false);
if (affectedRows != expectedRows)
{
return(DomainEventResult.StorageFailed(@event.Id,
$"The affected rows returned MySql state backend is incorrect, expected: {expectedRows}, actual: {affectedRows}."));
}
return(DomainEventResult.StorageSucceed(@event.Id));
}
/// <summary>
/// Uses <see cref="IRelationalDbStorage"/> with <see cref="DbExtensions.ReflectionSelector{TResult}(System.Data.IDataRecord)"/>.
/// </summary>
/// <param name="storage">The storage to use.</param>
/// <param name="query">Executes a given statement. Especially intended to use with <em>INSERT</em>, <em>UPDATE</em>, <em>DELETE</em> or <em>DDL</em> queries.</param>
/// <param name="parameters">Adds parameters to the query. Parameter names must match those defined in the query.</param>
/// <param name="cancellationToken">The cancellation token. Defaults to <see cref="CancellationToken.None"/>.</param>
/// <returns>Affected rows count.</returns>
/// <example>This uses reflection to provide parameters to an execute
/// query that reads only affected rows count if available.
/// <code>
/// //Here reflection (<seealso cref="DbExtensions.ReflectionParameterProvider{T}(IDbCommand, T, IReadOnlyDictionary{string, string})"/>)
/// is used to match parameter names as well as to read back the results (<seealso cref="DbExtensions.ReflectionSelector{TResult}(IDataRecord)"/>).
/// var query = "IF NOT EXISTS(SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = @tname) CREATE TABLE Test(Id INT PRIMARY KEY IDENTITY(1, 1) NOT NULL);"
/// await db.ExecuteAsync(query, new { tname = "test_table" });
/// </code>
/// </example>
public static Task <int> ExecuteAsync(
this IRelationalDbStorage storage,
string query,
object parameters,
CancellationToken cancellationToken = default)
{
return(storage.ExecuteAsync(query, command =>
{
if (parameters != null)
{
command.ReflectionParameterProvider(parameters);
}
}, cancellationToken));
}
/// <summary>
/// Executes a multi-record insert query clause with <em>SELECT UNION ALL</em>.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="storage">The storage to use.</param>
/// <param name="tableName">The table name to against which to execute the query.</param>
/// <param name="parameters">The parameters to insert.</param>
/// <param name="cancellationToken">The cancellation token. Defaults to <see cref="CancellationToken.None"/>.</param>
/// <param name="nameMap">If provided, maps property names from <typeparamref name="T"/> to ones provided in the map.</param>
/// <param name="onlyOnceColumns">If given, SQL parameter values for the given <typeparamref name="T"/> property types are generated only once. Effective only when <paramref name="useSqlParams"/> is <em>TRUE</em>.</param>
/// <param name="useSqlParams"><em>TRUE</em> if the query should be in parameterized form. <em>FALSE</em> otherwise.</param>
/// <returns>The rows affected.</returns>
public static Task <int> ExecuteMultipleInsertIntoAsync <T>(
this IRelationalDbStorage storage,
string tableName,
IEnumerable <T> parameters,
CancellationToken cancellationToken = default,
IReadOnlyDictionary <string, string> nameMap = null,
IEnumerable <string> onlyOnceColumns = null,
bool useSqlParams = true)
{
if (string.IsNullOrWhiteSpace(tableName))
{
throw new ArgumentException("The name must be a legal SQL table name", nameof(tableName));
}
if (parameters == null)
{
throw new ArgumentNullException(nameof(parameters));
}
var storageConstants = DbConstantsStore.GetDbConstants(storage.InvariantName);
var startEscapeIndicator = storageConstants.StartEscapeIndicator;
var endEscapeIndicator = storageConstants.EndEscapeIndicator;
//SqlParameters map is needed in case the query needs to be parameterized in order to avoid two
//reflection passes as first a query needs to be constructed and after that when a database
//command object has been created, parameters need to be provided to them.
var sqlParameters = new Dictionary <string, object>();
const string insertIntoValuesTemplate = "INSERT INTO {0} ({1}) SELECT {2};";
var columns = string.Empty;
var values = new List <string>();
if (parameters.Any())
{
//Type and property information are the same for all of the objects.
//The following assumes the property names will be retrieved in the same
//order as is the index iteration done.
var onlyOnceRow = new List <string>();
var properties = parameters.First().GetType().GetProperties();
columns = string.Join(",", nameMap == null
? properties.Select(pn =>
$"{startEscapeIndicator}{pn.Name}{endEscapeIndicator}")
: properties.Select(pn =>
$"{startEscapeIndicator}{(nameMap.ContainsKey(pn.Name) ? nameMap[pn.Name] : pn.Name)}{endEscapeIndicator}"));
if (onlyOnceColumns != null && onlyOnceColumns.Any())
{
var onlyOnceProperties = properties.Where(pn => onlyOnceColumns.Contains(pn.Name)).Select(pn => pn).ToArray();
var onlyOnceData = parameters.First();
foreach (var t in onlyOnceProperties)
{
var currentProperty = t;
var parameterValue = currentProperty.GetValue(onlyOnceData, null);
if (useSqlParams)
{
var parameterName = $"@{(nameMap.ContainsKey(t.Name) ? nameMap[t.Name] : t.Name)}";
onlyOnceRow.Add(parameterName);
sqlParameters.Add(parameterName, parameterValue);
}
else
{
onlyOnceRow.Add(string.Format(AdoNetFormatProvider, "{0}", parameterValue));
}
}
}
var dataRows = new List <string>();
var multiProperties = onlyOnceColumns == null ? properties : properties.Where(pn => !onlyOnceColumns.Contains(pn.Name)).Select(pn => pn).ToArray();
var parameterCount = 0;
foreach (var row in parameters)
{
foreach (var currentProperty in multiProperties)
{
var parameterValue = currentProperty.GetValue(row, null);
if (useSqlParams)
{
var parameterName = string.Format(IndexedParameterTemplate, parameterCount);
dataRows.Add(parameterName);
sqlParameters.Add(parameterName, parameterValue);
++parameterCount;
}
else
{
dataRows.Add(string.Format(AdoNetFormatProvider, "{0}", parameterValue));
}
}
values.Add($"{string.Join(",", onlyOnceRow.Concat(dataRows))}");
dataRows.Clear();
}
}
var query = string.Format(insertIntoValuesTemplate, tableName, columns, string.Join(storageConstants.UnionAllSelectTemplate, values));
return(storage.ExecuteAsync(query, command =>
{
if (!useSqlParams)
{
return;
}
foreach (var sp in sqlParameters)
{
var p = command.CreateParameter();
p.ParameterName = sp.Key;
p.Value = sp.Value ?? DBNull.Value;
p.Direction = ParameterDirection.Input;
command.Parameters.Add(p);
}
}, cancellationToken));
}