//--- Methods ---
public IDynamoTableTransactWriteItemsConditionCheck <TRecord> BeginConditionCheck <TRecord>(DynamoPrimaryKey <TRecord> primaryKey) where TRecord : class
{
var transactWriteItem = new TransactWriteItem {
ConditionCheck = new ConditionCheck {
TableName = _table.TableName,
Key = new Dictionary <string, AttributeValue> {
[primaryKey.PKName] = new AttributeValue(primaryKey.PKValue),
[primaryKey.SKName] = new AttributeValue(primaryKey.SKValue)
}
}
};
_request.TransactItems.Add(transactWriteItem);
var converter = new DynamoRequestConverter(transactWriteItem.ConditionCheck.ExpressionAttributeNames, transactWriteItem.ConditionCheck.ExpressionAttributeValues, _table.SerializerOptions);
return(new DynamoTableTransactWriteItemsConditionCheck <TRecord>(this, transactWriteItem.ConditionCheck, converter));
}
private TransactWriteItem GetInsertOrderFlow(Order order)
{
var item = new Dictionary <string, AttributeValue>
{
{ "ContractId", new AttributeValue()
{
S = order.ContractId
} },
{ "InstrumentId", new AttributeValue()
{
N = order.InstrumentId.ToString()
} },
{ "InstrumentName", new AttributeValue()
{
S = order.InstrumentName
} },
{ "Quantity", new AttributeValue()
{
N = order.Quantity.ToString()
} },
{ "Price", new AttributeValue()
{
N = order.Price.ToString()
} },
{ "Side", new AttributeValue()
{
S = order.Side
} },
{ "Status", new AttributeValue()
{
S = order.Status
} }
};
var writeItem = new TransactWriteItem()
{
Put = new Put()
{
TableName = "OrderFlow",
Item = item
}
};
return(writeItem);
}
public void Execute(AmazonDynamoDBRequest dynamoRequest)
{
var item = new TransactWriteItem();
if (dynamoRequest is UpdateItemRequest)
{
item.Update = ((UpdateItemRequest)dynamoRequest).Convert();
}
if (dynamoRequest is PutItemRequest)
{
item.Put = ((PutItemRequest)dynamoRequest).Convert();
}
if (dynamoRequest is DeleteItemRequest)
{
item.Delete = ((DeleteItemRequest)dynamoRequest).Convert();
}
_transactionItems.Add(item);
}
TransactWriteItem CreateDeleteTransactWriteItem <T>(T item)
{
var tableName = GetDynamoDBTableName <T>();
var properties = typeof(T).GetProperties();
var deleteItem = new Dictionary <string, AttributeValue>();
var partitionKeyProperty = properties.FirstOrDefault(p => p.CustomAttributes.Any(a => a.AttributeType == typeof(DynamoDBHashKeyAttribute)));
if (partitionKeyProperty == null)
{
throw new Exception();
}
var pkPropertyName = GetDynamoDBPropertyName(partitionKeyProperty);
var pkAttributeValue = CreateAttributeValue(partitionKeyProperty, item);
deleteItem.Add(pkPropertyName, pkAttributeValue);
var sortKeyProperty = properties.FirstOrDefault(p => p.CustomAttributes.Any(a => a.AttributeType == typeof(DynamoDBRangeKeyAttribute)));
if (sortKeyProperty != null)
{
var skPropertyName = GetDynamoDBPropertyName(sortKeyProperty);
var skAttributeValue = CreateAttributeValue(sortKeyProperty, item);
deleteItem.Add(skPropertyName, skAttributeValue);
}
var transactItem = new TransactWriteItem
{
Delete = new Delete
{
TableName = tableName,
Key = deleteItem
}
};
return(transactItem);
}