/// <summary>
/// PollyNotes-SearchFunction
///
/// This lambda function is integrated with the following API methods:
/// /notes/search/GET
///
/// This function does the following:
///
/// 1. Takes a JSON payload from API gateway and converts it into a Note POCO <see cref="Note"/>
/// 2. Queries DynamoDB using the QueryAsync feature. It will use the userId for the Partition Key, but a Filter will need
/// to be applied to do the search based on the note text.
/// 3. Returns the List of Note found
/// </summary>
/// <param name="note">POCO of Note from the JSON payload from API GW to Lambda. Only userId and note will be set.</param>
/// <param name="context">Lambda context</param>
/// <returns>List of Note from the Query to DynamoDB based on the userId and the note</returns>
public List <Note> FunctionHandler(Note note, ILambdaContext context)
{
// The note object contains the userId and a partial note sent from API GW in the /notes/search/GET
// {
// "userId": "...",
// "note": "..."
// }
Console.WriteLine("Initiating PollyNotes-SearchFunction...");
Console.WriteLine("Note received: " + JsonConvert.SerializeObject(note));
// Create the DynamoDB client and the Context for Object Persistence Model
AmazonDynamoDBClient client = new AmazonDynamoDBClient();
DynamoDBContext ddbcontext = new DynamoDBContext(client);
// Create a DynamoDB Operation Config to pass in a QueryFilter on the note
// Since the note attribute isn't a key, we need to use a QueryFilter
// The QueryFilter takes a list of ScanCondition
DynamoDBOperationConfig opConfig = new DynamoDBOperationConfig()
{
QueryFilter =
new List <ScanCondition>()
{
new ScanCondition("note", ScanOperator.Contains, note.note)
}
};
// Use the QueryAsync method to issue a query to DynamoDB based on the userId and QueryFilter
// We are using an Async command due to the .netcore SDK which doesn't support sync invokes
// We are using the Note POCO defined with the Object Persistence Model so all the data
// will be mapped to the right entries. The Table name is also defined in the POCO
AsyncSearch <Note> noteQuery = ddbcontext.QueryAsync <Note>(note.userId, opConfig);
// Retrieve all of the notes based on the Query from DynamoDB and wait
Task <List <Note> > searchTask = noteQuery.GetRemainingAsync();
searchTask.Wait();
// Once the list of Note has been fetched entirely, check for Exceptions.
// If there are no Exceptions
if (searchTask.Exception == null)
{
Console.WriteLine("Successfully executed QueryAsync with userId: " + note.userId + " and text containing: " + note.note);
// Log the Notes found
Console.WriteLine("Notes found in DynamoDB: " + JsonConvert.SerializeObject(searchTask.Result));
// Return the list
return(searchTask.Result);
}
else
{
// There was an exception, log the entry data and the exception
Console.WriteLine("Unable to QueryAsync with userId: " + note.userId + " and text containing: " + note.note);
Console.WriteLine(searchTask.Exception);
// Return an empty list
return(new List <Note>());
}
}
public async Task <List <Model.ObjectCode> > List(string parentObjectCodeId)
{
ListTablesResponse existingTables = await client.ListTablesAsync();
if (!existingTables.TableNames.Contains(TABLE_NAME))
{
await SetupTable(client, TABLE_NAME, "CodeId");
}
try
{
List <ScanCondition> filter = new List <ScanCondition>()
{
new ScanCondition("ParentId", ScanOperator.Equal, parentObjectCodeId.ToUpper())
};
AsyncSearch <Model.ObjectCode> scan = DDBContext.ScanAsync <Model.ObjectCode>(filter);
List <Model.ObjectCode> documentList = new List <Model.ObjectCode>();
do
{
documentList.AddRange(await scan.GetNextSetAsync());
} while (!scan.IsDone);
return(documentList);
}
catch (Exception ex)
{
Console.WriteLine("Error listing object codes: " + ex.Message);
}
return(null);
}
public async Task <IActionResult> Get(string firstName, string lastName, string secondLastName, string curp)
{
var credentials = new BasicAWSCredentials(AWSAccessKeyId, AWSSecretAccessKey);
var client = new AmazonDynamoDBClient(credentials, RegionEndpoint.USWest2);
ScanFilter scanFilter = new ScanFilter();
scanFilter.AddCondition("FirstName", ScanOperator.Equal, firstName);
scanFilter.AddCondition("LastName", ScanOperator.Equal, lastName);
scanFilter.AddCondition("SecondLastName", ScanOperator.Equal, secondLastName);
scanFilter.AddCondition("CURP", ScanOperator.Equal, curp);
ScanOperationConfig soc = new ScanOperationConfig()
{
// AttributesToGet = new List { "Id", "Title", "ISBN", "Price" },
Filter = scanFilter
};
DynamoDBContext context = new DynamoDBContext(client);
AsyncSearch <EmployeesPTU> search = context.FromScanAsync <EmployeesPTU>(soc, null);
List <EmployeesPTU> documentList = new List <EmployeesPTU>();
do
{
documentList = await search.GetNextSetAsync(default(System.Threading.CancellationToken));
} while (!search.IsDone);
return(Ok(documentList));
}
/// <summary>
/// Queries for replies posted within a specific time period.
/// </summary>
/// <param name="context">The DynamoDB context used to perform the query.</param>
/// <param name="forumName">The name of the ofrum we're interested in.</param>
/// <param name="threadSubject">Information about the subject we are
/// interested in.</param>
public static async Task FindRepliesPostedWithinTimePeriod(
IDynamoDBContext context,
string forumName,
string threadSubject)
{
string forumId = forumName + "#" + threadSubject;
Console.WriteLine("\nReplies posted within time period:");
DateTime startDate = DateTime.UtcNow - TimeSpan.FromDays(30);
DateTime endDate = DateTime.UtcNow - TimeSpan.FromDays(1);
List <object> times = new List <object>();
times.Add(startDate);
times.Add(endDate);
List <ScanCondition> scs = new List <ScanCondition>();
var sc = new ScanCondition("LastPostedBy", ScanOperator.Between, times.ToArray());
scs.Add(sc);
var cfg = new DynamoDBOperationConfig
{
QueryFilter = scs
};
AsyncSearch <Reply> response = context.QueryAsync <Reply>(forumId, cfg);
IEnumerable <Reply> repliesInAPeriod = await response.GetRemainingAsync();
foreach (Reply r in repliesInAPeriod)
{
Console.WriteLine("{r.Id}\t{r.PostedBy}\t{r.Message}\t{r.ReplyDateTime}");
}
}
public async Task <IEnumerable <BetsStat> > GetBetsStats()
{
AsyncSearch <BetsStat> search = context.ScanAsync <BetsStat>(Enumerable.Empty <ScanCondition>(), null);
List <BetsStat> result = await search.GetRemainingAsync();
return(result);
}
public async Task <IActionResult> GetAsync()
{
try
{ // COGNITO SERVICE
//AWSCredentials credentials = new CognitoAWSCredentials(cognitoID,RegionEndpoint.USEast1);
//var client = new AmazonDynamoDBClient(credentials,RegionEndpoint.USEast1);
// IAM SERVICE - Local
//var credentials = new BasicAWSCredentials(AWSAccessKeyId, AWSSecretAccessKey);
//var client = new AmazonDynamoDBClient(credentials, RegionEndpoint.USEast1);
// This approach works when you are depending on a role
var client = new AmazonDynamoDBClient(RegionEndpoint.USEast1);
ScanFilter scanFilter = new ScanFilter();
ScanOperationConfig soc = new ScanOperationConfig()
{
Filter = scanFilter
};
DynamoDBContext context = new DynamoDBContext(client);
AsyncSearch <lreb> search = context.FromScanAsync <lreb>(soc, null);
List <lreb> documentList = new List <lreb>();
do
{
documentList = await search.GetNextSetAsync(default(System.Threading.CancellationToken));
} while (!search.IsDone);
return(Ok(documentList));
}
catch (Exception e)
{
return(StatusCode(500, e));
}
}
/// <summary>
/// Queries a DynamoDB table to find replies posted within the last 15 days.
/// </summary>
/// <param name="context">The DynamoDB context used to perform the query.</param>
/// <param name="forumName">The name of the forum we're interested in.</param>
/// <param name="threadSubject">The thread object containing the query parameters.</param>
public static async Task FindRepliesInLast15Days(
IDynamoDBContext context,
string forumName,
string threadSubject)
{
string replyId = $"{forumName} #{threadSubject}";
DateTime twoWeeksAgoDate = DateTime.UtcNow - TimeSpan.FromDays(15);
List <object> times = new List <object>();
times.Add(twoWeeksAgoDate);
List <ScanCondition> scs = new List <ScanCondition>();
var sc = new ScanCondition("LastPostedBy", ScanOperator.GreaterThan, times.ToArray());
scs.Add(sc);
var cfg = new DynamoDBOperationConfig
{
QueryFilter = scs,
};
AsyncSearch <Reply> response = context.QueryAsync <Reply>(replyId, cfg);
IEnumerable <Reply> latestReplies = await response.GetRemainingAsync();
Console.WriteLine("\nReplies in last 15 days:");
foreach (Reply r in latestReplies)
{
Console.WriteLine($"{r.Id}\t{r.PostedBy}\t{r.Message}\t{r.ReplyDateTime}");
}
}
/// <summary>
/// PollyNotes-ListFunction
///
/// This lambda function is integrated with the following API methods:
/// /notes/GET
///
/// This function does the following:
/// 1. Takes a JSON payload from API gateway and converts it into a Note POCO <see cref="Note"/>
/// 2. Queries DynamoDB based on that payload using the QueryAsync feature
/// 3. Returns the List of Note found
/// </summary>
/// <param name="note">POCO of Note from the JSON payload from API GW to Lambda. In this case, it will only have the userId set</param>
/// <param name="context">Lambda context</param>
/// <returns>List of Note from the Query to DynamoDB based on the userId</returns>
public List <Note> FunctionHandler(Note note, ILambdaContext context)
{
// The note object only contains the userId as it's the only parameter sent in the /notes/GET
// {
// "userId": "..."
// }
Console.WriteLine("Initiating PollyNotes-ListFunction...");
// Create the DynamoDB client and the Context for Object Persistence Model
var dbClient = new AmazonDynamoDBClient();
var dbContext = new DynamoDBContext(dbClient);
// Use the QueryAsync method to issue a query to DynamoDB based on the userId
AsyncSearch <Note> noteQuery = dbContext.QueryAsync <Note>(note.userId);
// Retrieve all of the notes based on the Query from DynamoDB using GetRemainingAsync and wait
var list = noteQuery.GetRemainingAsync();
list.Wait();
// Return the list of Note (currently returning an empty list)
return((list.Exception == null)? list.Result : new List <Note>());
}
public List <T> GetScan <T>(IEnumerable <ScanCondition> scan) where T : class
{
AsyncSearch <T> search = _Context.ScanAsync <T>(scan);
Task <List <T> > item = search.GetRemainingAsync();
return(item.Result);
}
public async Task <IEnumerable <TenTwentyAgency> > GetAsync(CancellationToken cancellationToken = default(CancellationToken))
{
DynamoDBContext context = new DynamoDBContext(Settings.AmazonDynamoDBClient);
AsyncSearch <TenTwentyAgency> search = context.ScanAsync <TenTwentyAgency>(Enumerable.Empty <ScanCondition>(), null);
List <TenTwentyAgency> result = await search.GetRemainingAsync(cancellationToken);
return(result);
}
private static async Task <List <T> > GetAllAsync <T>(AsyncSearch <T> searchResult)
{
List <T> result;
do
{
result = await searchResult.GetRemainingAsync().ConfigureAwait(false);
} while (!searchResult.IsDone);
return(result);
}
public async Task <List <T> > GetAsyncSearchResult <T>(AsyncSearch <T> asyncSearch, CancellationToken cancellationToken)
{
var results = await asyncSearch.GetNextSetAsync(cancellationToken);
while (!asyncSearch.IsDone && !cancellationToken.IsCancellationRequested)
{
results.AddRange(await asyncSearch.GetRemainingAsync(cancellationToken));
}
return(results);
}
/// <summary>
/// Get a role by its normalized name.
/// </summary>
/// <param name="normalizedName">Normalized role name</param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public async Task <DynamoDBRole> GetRoleByName(string normalizedName, CancellationToken cancellationToken)
{
List <ScanCondition> conditionList = new List <ScanCondition>();
conditionList.Add(new ScanCondition("NormalizedName", ScanOperator.Equal, normalizedName));
AsyncSearch <DynamoDBRole> Roles = _context.ScanAsync <DynamoDBRole>(
conditionList, _roleStoreDBConfig
);
List <DynamoDBRole> RolesList = await Roles.GetRemainingAsync(cancellationToken);
return(RolesList.FirstOrDefault());
}
/// <summary>
/// Search for users by any of their attributes
/// </summary>
/// <param name="key">Name of the attribute</param>
/// <param name="expectedValue">Value that the attribute will have</param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public async Task <DynamoDBUser> GetUserByAttribute(string key, string expectedValue, CancellationToken cancellationToken)
{
List <ScanCondition> conditionList = new List <ScanCondition>();
conditionList.Add(new ScanCondition(key, ScanOperator.Equal, expectedValue));
AsyncSearch <DynamoDBUser> users = _context.ScanAsync <DynamoDBUser>(
conditionList, _userStoreDBConfig
);
List <DynamoDBUser> usersList = await users.GetRemainingAsync(cancellationToken);
return(usersList.FirstOrDefault());
}
public async Task <APIGatewayProxyResponse> Read(APIGatewayProxyRequest request, ILambdaContext context)
{
var response = new APIGatewayProxyResponse();
try
{
DynamoDBContext dbContext = new DynamoDBContext(new AmazonDynamoDBClient(RegionEndpoint.APSoutheast2));
AsyncSearch <Canvas> search = dbContext.ScanAsync <Canvas>(Enumerable.Empty <ScanCondition>(), null);
List <Canvas> result = await search.GetRemainingAsync();
//List<Canvas> list = new List<Canvas>();
//foreach (Canvas item in result)
//{
// Canvas canvas = item;
// string back = await GetS3Object(item.LayoutBackContent, context);
// canvas.LayoutBackContent = back;
// string front = await GetS3Object(item.LayoutFrontContent, context);
// canvas.LayoutFrontContent = front;
// list.Add(canvas);
//}
//context.Logger.Log(JsonConvert.SerializeObject(result));
//AmazonDynamoDBClient client = new AmazonDynamoDBClient(RegionEndpoint.APSoutheast2);
//var req = new ScanRequest
//{
// TableName = "identityONE_Card_Layouts",
// ProjectionExpression = "ID, Name, LastModifiedDatetime"
//};
//var resp = await client.ScanAsync(req);
//foreach (Dictionary<string, AttributeValue> item in resp.Items)
//{
// // Process the result.
// context.Logger.Log(JsonConvert.SerializeObject(item));
//}
response.StatusCode = (int)HttpStatusCode.OK;
response.Body = JsonConvert.SerializeObject(result);
response.Headers = new Dictionary <string, string> {
{ "Content-Type", "application/json" }, { "Access-Control-Allow-Origin", "*" }
};
}
catch (Exception ex)
{
return(ReturnResponse(ex));
}
return(response);
}
/// <summary>
/// Get users who are in a role.
/// </summary>
/// <param name="roleName">Normalized role name</param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public async Task <List <DynamoDBUser> > GetUsersByRole(string roleName, CancellationToken cancellationToken)
{
List <ScanCondition> conditionList = new List <ScanCondition>();
conditionList.Add(new ScanCondition("Roles", ScanOperator.Contains, roleName));
AsyncSearch <DynamoDBUser> users = _context.ScanAsync <DynamoDBUser>(
conditionList, _userStoreDBConfig
);
List <DynamoDBUser> usersList = await users.GetRemainingAsync(cancellationToken);
return(usersList);
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
var searchOptions = new AsyncSearchOptions <List <DataMap> >(SearchAsync, ReloadData);
_asyncSearch = new AsyncSearch <List <DataMap> >(View, searchOptions);
tableView.Source = new TableSource(this);
Title = _field.Label;
AddSearchBar();
}
protected async Task <TenTwentyResultSet <T> > ProtectedGetAsync(Guid agencyId, CancellationToken cancellationToken = default(CancellationToken))
{
DynamoDBContext context = new DynamoDBContext(Settings.AmazonDynamoDBClient);
AsyncSearch <T> result = context.QueryAsync <T>(agencyId.ToString(), QueryOperator.BeginsWith, new[] { prefix });
TenTwentyResultSet <T> resultSet = new TenTwentyResultSet <T>();
resultSet.Results = await result.GetRemainingAsync(cancellationToken);
resultSet.ContinuationToken = null;
resultSet.IsComplete = true;
return(resultSet);
}
public async Task <IEnumerable <T> > GetAll()
{
ScanFilter scanFilter = new ScanFilter();
scanFilter.AddCondition("Id", ScanOperator.NotEqual, 0);
ScanOperationConfig soc = new ScanOperationConfig
{
Filter = scanFilter
};
AsyncSearch <T> search = _context.FromScanAsync <T>(soc);
return(await search.GetRemainingAsync());
}
/// <summary>
/// Get all users with the provided claim
/// </summary>
/// <param name="claim">The claim in question</param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public async Task <List <DynamoDBUser> > GetUsersByClaim(Claim claim, CancellationToken cancellationToken)
{
List <ScanCondition> conditionList = new List <ScanCondition>();
conditionList.Add(new ScanCondition("ClaimTypes", ScanOperator.Contains, claim.Type));
conditionList.Add(new ScanCondition("ClaimValues", ScanOperator.Contains, claim.Value));
AsyncSearch <DynamoDBUser> users = _context.ScanAsync <DynamoDBUser>(
conditionList, _userStoreDBConfig
);
List <DynamoDBUser> usersList = await users.GetRemainingAsync(cancellationToken);
return(usersList);
}
/// <summary>
/// Get a user by one of the social logins they have used with the site
/// </summary>
/// <param name="loginProvider">Name of the provider</param>
/// <param name="providerKey">Unique key identifying the user</param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public async Task <DynamoDBUser> GetUserByLogin(string loginProvider, string providerKey, CancellationToken cancellationToken)
{
List <ScanCondition> conditionList = new List <ScanCondition>();
conditionList.Add(new ScanCondition("LoginProviders", ScanOperator.Contains, loginProvider));
conditionList.Add(new ScanCondition("LoginProviderKeys", ScanOperator.Contains, providerKey));
AsyncSearch <DynamoDBUser> users = _context.ScanAsync <DynamoDBUser>(
conditionList, _userStoreDBConfig
);
List <DynamoDBUser> usersList = await users.GetRemainingAsync(cancellationToken);
return(usersList.FirstOrDefault());
}
/// <summary>
/// Configures an async Query operation against DynamoDB, finding items that match the specified hash primary key.
/// </summary>
/// <param name="hashKeyValue">Hash key of the items to query.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="take">The number of items to take.</param>
/// <param name="queryFilter">Query filter for the Query operation operation.</param>
/// <returns>The async task.</returns>
private async Task <List <T> > QueryAsyncEx(object hashKeyValue, CancellationToken cancellationToken, int take = 100, List <ScanCondition> queryFilter = null)
{
List <T> items = new List <T>();
AsyncSearch <T> result = null;
bool foundEnought = false;
// Add the filter.
if (queryFilter != null)
{
// Add the query filter.
DynamoDBOperationConfig operationConfig = new DynamoDBOperationConfig();
operationConfig.QueryFilter = queryFilter;
result = _context.QueryAsync <T>(hashKeyValue, operationConfig);
}
else
{
// Set the query.
result = _context.QueryAsync <T>(hashKeyValue);
}
do
{
// Get the set of results.
List <T> data = await result.GetNextSetAsync(cancellationToken);
foreach (T entity in data)
{
// Add the item found.
items.Add(entity);
// If we have enought.
if (items.Count >= take)
{
break;
}
}
// No more data.
foundEnought = result.IsDone;
// If we have enought.
if (items.Count >= take)
{
break;
}
}while (!foundEnought);
// Return the list.
return(items);
}
public async Task <List <MediaItem> > LoadByUniqueNameAsync(Guid accountId, string uniqueName, bool decending)
{
var stopwatch = Stopwatch.StartNew();
try
{
var config = new DynamoDBContextConfig {
TableNamePrefix = _tablePrefix
};
var context = new DynamoDBContext(_client, config);
var operationConfig = new DynamoDBOperationConfig
{
IndexName = "UniqueMediaKey-DateAdded-index",
TableNamePrefix = _tablePrefix,
ConditionalOperator = ConditionalOperatorValues.And,
OverrideTableName = TableName,
BackwardQuery = decending
};
// Pagination doesn't work to well at present (or at-least not start/limit type for Dynamo).
// Pagination needs to use datetime range.
var hashKeyValue = string.Format("{0}-{1}", accountId, uniqueName.ToLower());
var operatorType = QueryOperator.Between;
IEnumerable <object> values = new List <object>
{
DateTime.MinValue,
DateTime.UtcNow,
};
AsyncSearch <MediaItem> asyncSearch = context.QueryAsync <MediaItem>(hashKeyValue, operatorType, values, operationConfig);
List <MediaItem> items = await asyncSearch.GetNextSetAsync();
// Assume one batch of query items is enough.
// really needs to be paginated on date range.
return(items.ToList());
}
catch (Exception ex)
{
Logger.LogException(ex, "Exception loading media items");
throw;
}
finally
{
stopwatch.Stop();
Logger.LogMessage("LoadByUniqueNameAsync took: {0}ms", stopwatch.ElapsedMilliseconds);
}
}
public async void listCartItems(List <ShoppingCart> dataCartItems, GridLayout grdShoppingCart)
{
dbConfig.ServiceURL = "https://026821060357.signin.aws.amazon.com/console/dynamobdb/";
dbConfig.AuthenticationRegion = "dynamodb.us-east-1.amazonaws.com";
dbConfig.RegionEndpoint = RegionEndpoint.USEast1;
AmazonDynamoDBClient dynDBClient = new AmazonDynamoDBClient("AKIAIMDIMZSEHYRAI6CQ", "6B2FRtd4JZiwq2iqiQJOmJPytboQ7EDOb08xovN3", dbConfig.RegionEndpoint);
//dynDBClient.Config.ServiceURL= "https://console.aws.amazon.com/dynamodb/";
dynDBClient.Config.ServiceURL = "https://026821060357.signin.aws.amazon.com/console/dynamodb/";
dynDBClient.Config.RegionEndpoint = RegionEndpoint.USEast1;
DynamoDBContext dynContext = new DynamoDBContext(dynDBClient);
AsyncSearch <ShoppingCart> listCartItems = dynContext.FromScanAsync <ShoppingCart>(new ScanOperationConfig()
{
ConsistentRead = true
});
dataCartItems = await listCartItems.GetRemainingAsync();
var theCart = from aCartItem in dataCartItems
where aCartItem.CustomerFname == strCustFName && aCartItem.CustomerLname == strCustLName && aCartItem.CheckedOut == false
select aCartItem;
grdShoppingCart.RemoveAllViews();
foreach (ShoppingCart cartItem in theCart)
{
CheckBox tvCartItem = new CheckBox(this);
string strCartItemDesc = cartItem.ProductDescription;
double dblCartItemUnitPrice = cartItem.UnitPrice;
int iCartItemQuant = cartItem.Quantity;
double dblCartItemTotalCost = cartItem.TotalCost;
tvCartItem.Text = string.Format("{0} qty. {1} @ ${2} = {3}", strCartItemDesc, iCartItemQuant, dblCartItemUnitPrice, dblCartItemTotalCost);
tvCartItem.SetTextSize(Android.Util.ComplexUnitType.Dip, 10f);
tvCartItem.SetTextColor(Android.Graphics.Color.Black);
tvCartItem.SetBackgroundColor(Android.Graphics.Color.White);
tvCartItem.SetPadding(20, 5, 20, 5);
tvCartItem.TextAlignment = TextAlignment.ViewStart;
tvCartItem.SetWidth(1200);
tvCartItem.SetBackgroundResource(Resource.Drawable.StoreName);
grdShoppingCart.AddView(tvCartItem);
}
dblTotalPurchase = dataCartItems.Sum <ShoppingCart>(x => x.TotalCost);
}
public async Task <List <MediaItem> > LoadByUserAsync(Guid userId, DateTime startDate, DateTime endDate)
{
var stopwatch = Stopwatch.StartNew();
try
{
var config = new DynamoDBContextConfig {
TableNamePrefix = _tablePrefix
};
var context = new DynamoDBContext(_client, config);
//QueryFilter filter = new QueryFilter();
//filter.AddCondition("UserId", QueryOperator.Equal, userId);
var operationConfig = new DynamoDBOperationConfig
{
IndexName = "UserId-DateAdded-index",
TableNamePrefix = _tablePrefix,
ConditionalOperator = ConditionalOperatorValues.And,
OverrideTableName = TableName,
BackwardQuery = true,
};
var hashKeyValue = userId;
var operatorType = QueryOperator.Between;
IEnumerable <object> values = new List <object> {
startDate, endDate
};
AsyncSearch <MediaItem> asyncSearch = context.QueryAsync <MediaItem>(hashKeyValue, operatorType, values, operationConfig);
List <MediaItem> items = await asyncSearch.GetNextSetAsync();
Logger.LogMessage("LoadByUserAsync loaded {0} items", items.Count);
return(items);
}
catch (Exception ex)
{
Logger.LogException(ex, "Exception loading media items (LoadByUserAsync)");
throw;
}
finally
{
stopwatch.Stop();
Logger.LogMessage("LoadByUserAsync took: {0} ms", stopwatch.ElapsedMilliseconds);
}
}
/// <summary>
/// PollyNotes-ListFunction
///
/// This lambda function is integrated with the following API methods:
/// /notes/GET
///
/// This function does the following:
///
/// 1. Takes a JSON payload from API gateway and converts it into a Note POCO <see cref="Note"/>
/// 2. Queries DynamoDB based on that payload using the QueryAsync feature
/// 3. Returns the List of Note found
/// </summary>
/// <param name="note">POCO of Note from the JSON payload from API GW to Lambda. In this case, it will only have the userId set</param>
/// <param name="context">Lambda context</param>
/// <returns>List of Note from the Query to DynamoDB based on the userId</returns>
public List <Note> FunctionHandler(Note note, ILambdaContext context)
{
// The note object only contains the userId as it's the only parameter sent in the /notes/GET
// {
// "userId": "..."
// }
Console.WriteLine("Initiating PollyNotes-ListFunction...");
Console.WriteLine("Note received: " + JsonConvert.SerializeObject(note));
// Create the DynamoDB client and the Context for Object Persistence Model
AmazonDynamoDBClient client = new AmazonDynamoDBClient();
DynamoDBContext ddbcontext = new DynamoDBContext(client);
// Use the QueryAsync method to issue a query to DynamoDB based on the userId
// We are using an Async command due to the .netcore SDK which doesn't support sync invokes
// We are using the Note POCO defined with the Object Persistence Model so all the data
// will be mapped to the right entries. The Table name is also defined in the POCO
AsyncSearch <Note> noteQuery = ddbcontext.QueryAsync <Note>(note.userId);
// Retrieve all of the notes based on the Query from DynamoDB and wait
Task <List <Note> > listTask = noteQuery.GetRemainingAsync();
listTask.Wait();
// Once the list has been fetched entirely, check for Exceptions.
// If there are no Exceptions
if (listTask.Exception == null)
{
Console.WriteLine("Successfully executed QueryAsync with userId: " + note.userId);
// Log the Notes found
Console.WriteLine("Notes found in DynamoDB: " + JsonConvert.SerializeObject(listTask.Result));
// Return the list
return(listTask.Result);
}
else
{
// There was an exception, log the entry data and the exception
Console.WriteLine("Unable to QueryAsync note with userId: " + note.userId);
Console.WriteLine(listTask.Exception);
// Return an empty list
return(new List <Note>());
}
}
public async Task <List <T> > LoadAll <T>(Dictionary <string, object>?conditions = null)
where T : EntryBase, new()
{
if (this.context == null)
{
throw new Exception("Database is not connected");
}
try
{
AsyncSearch <T> search = this.context.ScanAsync <T>(ToScanConditions(conditions), this.operationConfig);
return(await search.GetRemainingAsync());
}
catch (ResourceNotFoundException)
{
throw new Exception("Database table not found. This may be caused by new tables not propagating immediately.");
}
}
public async Task <IEnumerable <Expense> > GetExpenses()
{
ScanFilter scanFilter = new ScanFilter();
scanFilter.AddCondition("Id", ScanOperator.NotEqual, 0);
ScanOperationConfig soc = new ScanOperationConfig()
{
Filter = scanFilter
};
AsyncSearch <Expense> search = context.FromScanAsync <Expense>(soc, null);
List <Expense> documentList = new List <Expense>();
do
{
documentList = await search.GetNextSetAsync(default(System.Threading.CancellationToken));
} while (!search.IsDone);
return(documentList);
}
public async Task <List <Coupon> > Get()
{
CreateTable();
ScanFilter scanFilter = new ScanFilter();
//scanFilter.AddCondition("StoreName", ScanOperator.Equal, storeName);
ScanOperationConfig soc = new ScanOperationConfig()
{
Filter = scanFilter
};
DynamoDBContext context = new DynamoDBContext(dynamoDBClient);
AsyncSearch <Coupon> search = context.FromScanAsync <Coupon>(soc, null);
List <Coupon> documentList = new List <Coupon>();
do
{
documentList = await search.GetNextSetAsync(default(System.Threading.CancellationToken));
} while (!search.IsDone);
return(documentList);
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
var searchOptions = new AsyncSearchOptions <List <DataMap> >(SearchAsync, ReloadData);
_asyncSearch = new AsyncSearch <List <DataMap> >(View, searchOptions);
AddBorders();
AddNavigationItems();
AddSearchBar();
SwitchOrientation(InterfaceOrientation);
// TODO: this null check should be removed. If
// metadata is null, Reload should not called
// in the first place.
if (null != _applicationMetadata)
{
ReloadData();
}
}
/// <summary>
/// Performs an asynchronous search using the query parameters specified.
/// On completion the AsyncCallback specified as callback is notified.
/// </summary>
/// <param name="queryParameters">A Google.CustomSearch.QueryParameters that specifies the search to be performed.</param>
/// <param name="callback">A System.AsyncCallback object that will be notified when the call completes.</param>
/// <returns>Returns a System.IAsyncResult that can be used to monitor the status of the asynchronous call.</returns>
public IAsyncResult SearchAsync(QueryParameters queryParameters, AsyncCallback callback)
{
AsyncSearch caller = new AsyncSearch(this.Search);
// TODO: What should be passed as the state object? is the Filter.Label appropriate?
return caller.BeginInvoke(queryParameters, callback, queryParameters.Filter.Label);
}