Why can't I connect to Google Talk in agsXMPP? - mono

I'm trying to get started using agsXMPP, but I'm having some problems. I'm trying to run this code:
using System;
using agsXMPP;
namespace TestAgs
{
class MainClass
{
public static void Main (string[] args)
{
XmppClientConnection connection = new XmppClientConnection ();
connection.OnLogin += delegate {
Console.WriteLine ("logged in");
};
connection.Server = "gmail.com";
connection.ConnectServer = "talk.google.com";
connection.Username = "my username"; // I tried both with and without '#gmail.com'
connection.Password = "my password";
connection.Open();
}
}
}
This compiles fine, but when I try to run it, nothing happens. It runs and completes without any errors, but "logged in" never gets printed to the console. What am I doing wrong?
If it makes a difference, I'm using Mono 2.4 on Ubuntu 10.04.

Unless connection.Open () blocks, which I doubt, the issue is that your program hits the end of main, and therefore it is done running and ends.
How you want to keep it from exiting depends on what you are trying to do, but one way would be a ManualResetEvent:
var mre = new System.Threading.ManualResetEvent (false);
mre.WaitOne ();
Of course, now you may have the opposite problem, there is no way for your app to finish.

I think issue is port number. You did not supply 5222 or 5223 in the connection.

just add Console.ReadLine(); after the line 'connection.Open();'

// connection.Server = "gmail.com";
connection.ConnectServer = "talk3.l.google.com"; OR
connection.ConnectServer = "talk2.l.google.com";
connection.Username = "my username"; // I tried both with and without '#gmail.com'
connection.Password = "my password";
connection.Open();
talk3.l.google worked fine for me.

Related

Transaction not working after unsuccessful connection to redis using StackExchange.Redis

I'm not sure, whether it is a bug or I'm doing something wrong. Here is the code:
using StackExchange.Redis;
ConnectionMultiplexer conn = null;
while (conn == null);
{
try
{
conn = ConnectionMultiplexer.Connect("localhost:6379");
}
catch (Exception)
{
conn = null;
Thread.Sleep(TimeSpan.FromSeconds(5));
}
}
var db = conn.GetDatabase();
var transaction = db.CreateTransaction();
var tasks = new List<Task>();
tasks.Add(transaction.HashSetAsync("key", "field", "value"));
if (transaction.Execute())
{
Task.WaitAll(tasks.ToArray());
}
When I run it with started redis (windows version - 2.6, 2.8.17, 2.8.19), everything works fine. If I start redis after few loops of the cycle, either it doesn't jump into if-statement or it jumps and get blocked on WaitAll(). If I try to check values in redis, they are stored.
This situation happens when we start server and forget to start redis. After postpone start of redis it gets stuck. The same problem appears when using batch instead of transaction.
Am I doing connection to multiplexer wrong or is it bug? (I found few that looked similar but I'm not sure)
It was a bug in older versions of StackExchange.Redis - 1.0.481, 1.0.488 (didn't test any older ones). With new version 1.1.553 it works fine (https://github.com/StackExchange/StackExchange.Redis/issues/200).

Issue of multiple SQL notifications in ASP.Net web application on page refresh

I am facing an issue while using SQL Server Notifications. I am developing a web application in ASP.net where one of the page needs to be notified about new entries in one of the tables in a SQL Server database. I am using SQL Server Notification services along with Signal R to achieve this functionality.All seems to work fine with my web page getting updates about new data entries.
The problem arises when the page using notification is refreshed. I find the no of notification for single entry in database go up by the number of refreshes. So if I refresh the page thrice, I get 3 notifications for one entry. I am bit concerned if this would be a burden on server when the no of connected users increases. Also if there is an error while processing the request to update the page with new entry, the user gets multiple error messages with same text. I tried debugging my code and found out that the on change event of SqlDependency object used is fired multiple time with different IDs every time. Below is brief overview of what my code is doing to use notifications -
I am using SQL Server 2012 and enable_broker is set for the database.
In global.asax, I am using application_start and application_stop events to start and stop SqlDependency.
In page code, I am setting a new SqlDependency object on page load using a command object to monitor the exact data field of the table.
When onchange of SqlDependency object fires, I am notifying the UI using Signal R hub class. Then I remove the OnChange handler of the SqlDependency object, call for SqlDependency.Stop(connectionstring), set SqlDependency object to nothing, call for SqlDependency.Start(connectionstring) and finally set up the SqlDependency object again using the command object for updated data. This whole set to nothing-stop-start-reset object is to continue monitoring the data for changes.
The above steps work fine but when I refresh the page, those are repeated for the number of refreshes. I tried a lot of things by changing code and debugging but nothing seems to resolve the issue. Now I am wondering if it is some setting somewhere that I missed.
Please help me resolve this issue. Also let me know if any other information such as environment, coding details etc are required.
Regards,
Tanmay
This is probably caused by connection pooling. It reurns a notification for each connection open in the pool. You can cancel the pooling for this specific service by changing the Connection String property:
Pooling = False;
i have resolved the following problem by using the below code, its works me.
SingletonDbConnect.cs
public class SingletonDbConnect
{
private static SingletonDbConnect dbInstance;
private static string connString = ConfigurationManager.ConnectionStrings["MyConnection"].ConnectionString;
private readonly SqlConnection conn = new SqlConnection(connString);
private SingletonDbConnect()
{
}
public static SingletonDbConnect getDbInstance()
{
if (dbInstance == null)
{
dbInstance = new SingletonDbConnect();
}
return dbInstance;
}
public SqlConnection getDbConnection()
{
try
{
conn.Close();
conn.Open();
}
catch (SqlException e)
{
}
finally
{
}
return conn;
}
}
SqlDependencyEvent.cs
public class SqlDependencyEvent
{
internal static int PageLoadCounter = 0;
public void getEmailMessagesByEmailId(Guid emailid)
{
SingletonDbConnect conn = SingletonDbConnect.getDbInstance();
using (MembersController.command = new SqlCommand(SQL.emailmessagesbyaccount_sql(), conn.getDbConnection()))
{
MembersController.command.Notification = null;
if (MembersController.dependency == null)
{
MembersController.dependency = new SqlDependency(MembersController.command);
MembersController.dependency.OnChange += new OnChangeEventHandler(emailMessages_OnChange);
}
var reader = MembersController.command.ExecuteReader();
}
PageLoadCounter++;
}
private void emailMessages_OnChange(object sender, SqlNotificationEventArgs e)
{
if (e.Type == SqlNotificationType.Change)
{
if (MembersController.dependency != null)
{
MembersController.dependency.OnChange -= emailMessages_OnChange;
}
NotificationHub.EmailUpdateRecords();
SingletonDbConnect conn = SingletonDbConnect.getDbInstance();
using (MembersController.command = new SqlCommand(SQL.emailmessagesbyaccount_sql(), conn.getDbConnection()))
{
MembersController.command.Parameters.Add(new SqlParameter("#emailaccountid", defaultemailid));
MembersController.command.Notification = null;
MembersController.dependency = new SqlDependency(MembersController.command);
MembersController.dependency.OnChange += new OnChangeEventHandler(emailMessages_OnChange);
var reader = MembersController.command.ExecuteReader();
}
PageLoadCounter++;
}
}
}
MembersController.cs
public class MembersController : Controller
{
SingletonDbConnect conn = SingletonDbConnect.getDbInstance();
internal static SqlCommand command = null;
internal static SqlDependency dependency = null;
//
// GET: /Members/
public ActionResult Index()
{
SqlDependency.Stop(conn.getDbConnection().ConnectionString);
SqlDependency.Start(conn.getDbConnection().ConnectionString);
return View();
}
}
its resolved my problem and its working me, even we refresh page more than 1, but SqlDependency will call only once.
i used one of the MembersController for SqlDependency start and stop, its your own logic, you can use the same code in Global.ascx instead of MembersController.cs
i hope it will help you and resolve issue. ask me if you have still any problem thanks.

Trouble Attaching File Programmatically to Email in Windows Metro App C#/XAML using Share Charm

I'm simply trying to attach a file named Document.pdf in the DocumentsLibrary to an email using the Share Charm. My code below works perfectly on the Local Machine:
private async void OnDataRequestedFiles(DataTransferManager sender, DataRequestedEventArgs e)
{
List<IStorageItem> shares = new List<IStorageItem>();
StorageFile filetoShare = await Windows.Storage.KnownFolders.DocumentsLibrary.GetFileAsync("Document.pdf");
if (filetoShare != null)
{
shares.Add(filetoShare);
filetoShare = null;
}
if (shares != null)
{
DataPackage requestData = e.Request.Data;
requestData.Properties.Title = "Title";
requestData.Properties.Description = "Description"; // The description is optional.
requestData.SetStorageItems(shares);
shares = null;
}
else
{
e.Request.FailWithDisplayText("File not Found.");
}
}
But when I run the exact same code on a Windows Surface Tablet, I get the dreaded "There's nothing to share right now." on the right in the Charms flyout area.
Here's a little more background to help:
I'm not looking to use a File Picker...I know the exact file I'm looking for
I've enabled the Documents Library Capability in the manifest
I've added a File Type Association for pdf in the manifest
and yes, the file does exist and is in the Documents Library
an email account is properly setup in the Mail App on the surface
I can successfully send text emails from the Tablet...just not emails with attachments
Like I said, this works on my Win 8 Development Machine as expected...just not on the Surface. I'm wondering if the Surface has different file or folder permissions?
Thanks for the help...this is driving me CRAZY
I finally figured it out - the problem was that my Event Handler was async (so that I could use await to set the StorageFile variable).
I solved it by setting the StorageFile variable earlier in my code so that it was already available when the Event Handler was called.
I still have no idea why it worked on my development machine, but no on the WinRT surface...
The handler can be an async method. In this case, it is critical to use DataTransferManager. Please refer to the MSDN page specifically for this scenario. For your convenience, the code from the page is copied to here:
private void RegisterForShare()
{
DataTransferManager dataTransferManager = DataTransferManager.GetForCurrentView();
dataTransferManager.DataRequested += new TypedEventHandler<DataTransferManager,
DataRequestedEventArgs>(this.ShareStorageItemsHandler);
}
private async void ShareStorageItemsHandler(DataTransferManager sender,
DataRequestedEventArgs e)
{
DataRequest request = e.Request;
request.Data.Properties.Title = "Share StorageItems Example";
request.Data.Properties.Description = "Demonstrates how to share files.";
// Because we are making async calls in the DataRequested event handler,
// we need to get the deferral first.
DataRequestDeferral deferral = request.GetDeferral();
// Make sure we always call Complete on the deferral.
try
{
StorageFile logoFile =
await Package.Current.InstalledLocation.GetFileAsync("Assets\\Logo.png");
List<IStorageItem> storageItems = new List<IStorageItem>();
storageItems.Add(logoFile);
request.Data.SetStorageItems(storageItems);
}
finally
{
deferral.Complete();
}
}
It is critical to place the following statement before any async method is called:
DataTransferManager dataTransferManager = DataTransferManager.GetForCurrentView();
You only have half a second to get the whole job done (getting the file, attaching...etc.). If the half-second deadline occurs you'll get this "driving crazy" message. Consider implementing some resumable logic and replace the message with "the attachment is being prepared please try again in a few seconds" (or else).
Your WinRT device might be just slower than your development machine. The latter just does the job before the deadline...

Error when trying add data to RavenDb

I'm using autofac and the interfaces are correctly resolved but this code fails with "No connection could be made because the target machine actively refused it 127.0.0.1:8081"
using (var store = GetService<IDocumentStore>())
{
using (var session = store.OpenSession())
{
session.Store(new Entry { Author = "bob", Comment = "My son says this", EntryId = Guid.NewGuid(), EntryTime = DateTime.Now, Quote = "I hate you dad." });
session.SaveChanges();
}
}
Here is the registration
builder.Register<IDocumentStore>(c =>
{
var store = new DocumentStore { Url = "http://localhost:8081" };
store.Initialize();
return store;
}).SingleInstance();
When I navigate to http://localhost:8081 I do get the silverlight management UI. Although I'm running a Windows VM and vmware and Silverlight5 don't play together. That's another issue entirely. Anyways does anyone see what I'm doing wrong here or what I should be doing differently? Thanks for any code, tips, or tricks.
On a side note, can I enter some dummy records from a command line interface? Any docs or examples of how I can do that?
Thanks All.
Just curious, are you switching RavenDB to listen on 8081? The default is 8080. If you're getting the management studio to come up, I suspect you are.
I'm not too familiar with autofac but, it looks like you're wrapping your singleton DocumentStore in a using statement.
Try:
using (var session = GetService<IDocumentStore>().OpenSession())
{
}
As far as dummy records go, the management studio will ask you if you want to generate some dummy data if your DB is empty. If you can't get silverlight to work in the VM, I'm not sure if there's another automated way to do it.
Perhaps using smuggler:
http://ravendb.net/docs/server/administration/export-import
But you'd have to find something to import.

Execute a SQL stored procedure before every query generated by EntityFramework

I need to execute a SQL stored procedure every time before I query my ObjectContext. What I want to achieve is setting the CONTEXT_INFO to a value which will be later on used with most of my queries.
Has anyone done that? Is that possible?
[EDIT]
Currently I'm achieving this by opening the connection and executing the stored procedure in my ObjectContext constructor like this:
public partial class MyEntitiesContext
{
public MyEntitiesContext(int contextInfo) : this()
{
if (Connection.State != ConnectionState.Open)
{
Connection.Open(); // open connection if not already open
}
var connection = ((EntityConnection)Connection).StoreConnection;
using (var cmd = connection.CreateCommand())
{
// run stored procedure to set ContextInfo to contextInfo
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "[dbo].[SetContextInfo]";
cmd.Parameters.Add(new SqlParameter("#ci", _contextInfo));
cmd.ExecuteNonQuery();
}
// leave the connection open to reuse later
}
}
Then in my integration test:
[TestMethod]
public void TestMethod1()
{
using (var ctx = new MyEntitiesContext(1))
{
Assert.AreEqual(2, ctx.Roles.ToList().Count);
Assert.AreEqual(2, ctx.Users.ToList().Count);
}
}
But this requires me to leave the connection open - this is error prone since I will always need CONTEXT_INFO, and another developer might easily do:
[TestMethod]
public void TestMethod2()
{
using (var ctx = new MyEntitiesContext(1))
{
// do something here
// ... more here :)
ctx.Connection.Close(); // then out of the blue comes Close();
// do something here
Assert.AreEqual(2, ctx.Roles.ToList().Count);
Assert.AreEqual(2, ctx.Users.ToList().Count); // this fails since the where
// clause will be:
// WHERE ColumnX = CAST(CAST(CONTEXT_INFO() AS BINARY(4)) AS INT)
// and CONTEXT_INFO is empty - there are no users with ColumnX set to 0
// while there are 2 users with it set to 1 so this test should pass
}
}
The above means that I can write the code like in my test and everthing is green (YAY!) but then my colleague uses the code from TestMethod2 somewhere in his business logic and it's all f'd up - and nobody knows where and why since all tests are green :/
[EDIT2]
This blog post certainly does not answer my question but actually solves my problem. Maybe going with NHibernate will be better suited for my purpose :)
We have used this pattern.
But the way we did it was to call the stored procedure as the first opperation inside each db context.
Finally I found the answer. I can wrap the connection using the EFProvider wraper toolkit from EFProviderWrappers.
To do this I mostly have to derive from EFProviderWrapperConnection and override the DbConnection.Open() method. I already tried it with the Tracing provider and it works fine. Once I test it with my solution I will add more information.