internal void AddRequestHandler(AmazonDynamoDBRequest request, bool isAsync)
{
((Amazon.Runtime.Internal.IAmazonWebServiceRequest)request).AddBeforeRequestHandler(isAsync ?
new RequestEventHandler(this.UserAgentRequestEventHandlerAsync) :
new RequestEventHandler(this.UserAgentRequestEventHandlerSync)
);
}
public IEnumerable <T> Query <T>(AmazonDynamoDBRequest query)
{
var queryResult = base.GetDynamo()
.QueryAsync((QueryRequest)query)
.Result;
return(queryResult
.Items
.Select(x => x.Map <T>())
.ToList());
}
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);
}
public RequestWrapper(AmazonDynamoDBClient mDynamoDB, AmazonDynamoDBRequest req)
{
this.mDynamoDB = mDynamoDB;
this.mReq = req;
}
public override int ExecuteNonQuery(ServiceCursorDef cursorDef, IDataParameterCollection parms, CommandBehavior behavior)
{
Initialize();
Query query = cursorDef.Query as Query;
Dictionary <string, AttributeValue> values = new Dictionary <string, AttributeValue>();
if (parms.Count > 0)
{
for (int i = 0; i < parms.Count; i++)
{
ServiceParameter parm = parms[i] as ServiceParameter;
DynamoDBHelper.GXToDynamoQueryParameter("", values, parm);
}
}
var pattern = @"\((.*) = :(.*)\)";
Dictionary <string, AttributeValue> keyCondition = new Dictionary <string, AttributeValue>();
List <string> filters = new List <string>();
foreach (var keyFilter in query.Filters)
{
var match = Regex.Match(keyFilter, pattern);
String varName = match.Groups[2].Value;
if (match.Groups.Count > 1)
{
keyCondition[match.Groups[1].Value] = values[varName];
}
}
AmazonDynamoDBRequest request = null;
switch (query.CursorType)
{
case ServiceCursorDef.CursorType.Select:
throw new NotImplementedException();
case ServiceCursorDef.CursorType.Delete:
request = new DeleteItemRequest()
{
TableName = query.TableName,
Key = keyCondition
};
mDynamoDB.DeleteItem((DeleteItemRequest)request);
break;
case ServiceCursorDef.CursorType.Insert:
request = new PutItemRequest
{
TableName = query.TableName,
Item = values
};
mDynamoDB.PutItem((PutItemRequest)request);
break;
case ServiceCursorDef.CursorType.Update:
request = new UpdateItemRequest
{
TableName = query.TableName,
Key = keyCondition,
AttributeUpdates = ToAttributeUpdates(keyCondition, values)
};
mDynamoDB.UpdateItem((UpdateItemRequest)request);
break;
default:
break;
}
return(0);
}
private static void CreateDynamoQuery(Query query, Dictionary <string, AttributeValue> values, String[] queryFilters, out DynamoDBDataReader dataReader, out AmazonDynamoDBRequest req)
{
dataReader = null;
req = null;
if (query is Scan)
{
req = new ScanRequest
{
TableName = query.TableName,
ProjectionExpression = String.Join(",", query.Projection),
};
if (queryFilters.Length > 0)
{
((ScanRequest)req).FilterExpression = String.Join(" AND ", queryFilters);
((ScanRequest)req).ExpressionAttributeValues = values;
}
}
else
{
req = new QueryRequest
{
TableName = query.TableName,
KeyConditionExpression = String.Join(" AND ", query.Filters),
ExpressionAttributeValues = values,
ProjectionExpression = String.Join(",", query.Projection),
};
}
}
