In my case I need subscribe to TFS events (create/delete team project, workitem, checkin, iteration, areas) for realization some business logic. I based on this manual. Now I can catch only workitem and checkin events, but I need more (team project, iteration, areas). In this list, I did not find the right events.
using System;
using System.Collections.Generic;
using System.Diagnostics;
using Microsoft.TeamFoundation.Common;
using Microsoft.TeamFoundation.Framework.Server;
using Microsoft.TeamFoundation.Integration.Server;
using Microsoft.TeamFoundation.VersionControl.Server;
using Microsoft.TeamFoundation.WorkItemTracking.Server;
public class WorkItemChangedEventHandler : ISubscriber
{
public string Name
{
get { return "WorkItemChangedEventHandler"; }
}
public SubscriberPriority Priority
{
get { return SubscriberPriority.Normal; }
}
public Type[] SubscribedTypes()
{
var types = new List<Type>
{
typeof(Microsoft.TeamFoundation.WorkItemTracking.Server.WorkItemChangedEvent),// working
typeof(Microsoft.TeamFoundation.VersionControl.Server.CheckinNotification),// working
typeof(Microsoft.TeamFoundation.Integration.Server.ProjectCreatedEvent)// NOT working
};
return types.ToArray();
}
public EventNotificationStatus ProcessEvent(TeamFoundationRequestContext requestContext, NotificationType notificationType,
object notificationEventArgs, out int statusCode, out string statusMessage, out ExceptionPropertyCollection properties)
{
statusCode = 0;
properties = null;
statusMessage = String.Empty;
try
{
EventLog.WriteEntry("WorkItemChangedEventHandler", string.Format("Entity: {0} was modified", notificationEventArgs.GetType()));
}
catch (Exception ex)
{
EventLog.WriteEntry("WorkItemChangedEventHandler", ex.Message + ex.StackTrace);
}
return EventNotificationStatus.ActionPermitted;
}
}
I have one class for CheckinNotificationEventHandler:
public class CheckinNotificationEventHandler : ISubscriber
{
public Type[] SubscribedTypes()
{
return new Type[1] { typeof(CheckinNotification) };
}
public EventNotificationStatus ProcessEvent(TeamFoundationRequestContext requestContext, NotificationType notificationType, object notificationEventArgs, out int statusCode, out string statusMessage, out ExceptionPropertyCollection properties)
{
if (notificationType == NotificationType.Notification && notificationEventArgs is CheckinNotification)
{
...
}
return EventNotificationStatus.ActionPermitted;
}
}
and a second class for WorkItemChangedEventHandler:
public class WorkItemChangedEventHandler : ISubscriber
{
public Type[] SubscribedTypes()
{
return new Type[1] { typeof(Microsoft.TeamFoundation.WorkItemTracking.Server.WorkItemChangedEvent) };
}
public EventNotificationStatus ProcessEvent(TeamFoundationRequestContext requestContext, NotificationType notificationType, object notificationEventArgs, out int statusCode, out string statusMessage, out ExceptionPropertyCollection properties)
{
if (notificationType == NotificationType.Notification && notificationEventArgs is WorkItemChangedEvent)
{
...
}
return EventNotificationStatus.ActionPermitted;
}
}
Related
I have an application with uses multiple contexts for EF, some are code first, some server first, and all are dynamic.
I have a class that I call to get these contexts in my app.
Each context implements an interface such as:
public interface IDatabaseContextSwitcher
{
IVGSContext GetDatabase(string organization);
IVGSContext GetDatabase(Guid organizationGuid, string email);
IVGSServerConn GetServerDatabase(string databaseName);
IAuthContext GetAuthorizationDatabase();
}
I therefore has a class that implments the instances of these interfaces in the application. (VGSContext, VGSServerConn, and AuthContext).
I am trying to test these in my test project. I have made new classes from the interfaces with the plan to plug in some DbSets into these new classes and then test that my controllers do the correct thing.
However, I can't seem to figure out how to initialize the DBSets.
For example the following dies on Add:
public AuthContextForTesting()
{
Organizations.Add(new Organization()
{OrganizationName = "Test1", PK_Organization = Guid.Parse("34CE4F83-B3C9-421B-B1F3-42BBCDA9A004")});
var cnt = Organizations.Count();
}
public DbSet<Organization> Organizations { get; set; }
I tried to initialize the DBSet with:
Organizations=new DbSet();
But it gives an error that this is not allowed due to permissions.
How do I set up my initial dbsets in code for my tests?
To be able to do this, you first have to derive a class from DBSet. Sadly, my app uses both Core EF and EF 6 so I had to create 2 classes.
EF 6 Class
public class FakeDbSet<T> : System.Data.Entity.DbSet<T>, IDbSet<T> where T : class
{
List<T> _data;
public FakeDbSet()
{
_data = new List<T>();
}
public override T Find(params object[] keyValues)
{
throw new NotImplementedException("Derive from FakeDbSet<T> and override Find");
}
public override T Add(T item)
{
_data.Add(item);
return item;
}
public override T Remove(T item)
{
_data.Remove(item);
return item;
}
public override T Attach(T item)
{
return null;
}
public T Detach(T item)
{
_data.Remove(item);
return item;
}
public override T Create()
{
return Activator.CreateInstance<T>();
}
public TDerivedEntity Create<TDerivedEntity>() where TDerivedEntity : class, T
{
return Activator.CreateInstance<TDerivedEntity>();
}
public List<T> Local
{
get { return _data; }
}
public override IEnumerable<T> AddRange(IEnumerable<T> entities)
{
_data.AddRange(entities);
return _data;
}
public override IEnumerable<T> RemoveRange(IEnumerable<T> entities)
{
for (int i = entities.Count() - 1; i >= 0; i--)
{
T entity = entities.ElementAt(i);
if (_data.Contains(entity))
{
Remove(entity);
}
}
return this;
}
Type IQueryable.ElementType
{
get { return _data.AsQueryable().ElementType; }
}
System.Linq.Expressions.Expression IQueryable.Expression
{
get { return _data.AsQueryable().Expression; }
}
IQueryProvider IQueryable.Provider
{
get { return _data.AsQueryable().Provider; }
}
IEnumerator IEnumerable.GetEnumerator()
{
return _data.GetEnumerator();
}
IEnumerator<T> IEnumerable<T>.GetEnumerator()
{
return _data.GetEnumerator();
}
}
The EF Core had to include some interfaces to work.
public class FakeCoreDbSet<T> : Microsoft.EntityFrameworkCore.DbSet<T> , IQueryable, IEnumerable<T> where T : class
{
List<T> _data;
public FakeCoreDbSet()
{
_data = new List<T>();
}
public override T Find(params object[] keyValues)
{
throw new NotImplementedException("Derive from FakeDbSet<T> and override Find");
}
public override EntityEntry<T> Add(T item)
{
_data.Add(item);
//return item;
return null;
}
public override EntityEntry<T> Remove(T item)
{
_data.Remove(item);
//return item;
return null;
}
public override EntityEntry<T> Attach(T item)
{
return null;
}
public T Detach(T item)
{
_data.Remove(item);
return item;
}
public IList GetList()
{
return _data.ToList();
}
//public override T Create()
//{
// return Activator.CreateInstance<T>();
//}
public TDerivedEntity Create<TDerivedEntity>() where TDerivedEntity : class, T
{
return Activator.CreateInstance<TDerivedEntity>();
}
public List<T> Local
{
get { return _data; }
}
public override void AddRange(IEnumerable<T> entities)
{
_data.AddRange(entities);
//return _data;
}
public override void RemoveRange(IEnumerable<T> entities)
{
for (int i = entities.Count() - 1; i >= 0; i--)
{
T entity = entities.ElementAt(i);
if (_data.Contains(entity))
{
Remove(entity);
}
}
// this;
}
Type IQueryable.ElementType
{
get { return _data.AsQueryable().ElementType; }
}
System.Linq.Expressions.Expression IQueryable.Expression
{
get { return _data.AsQueryable().Expression; }
}
IQueryProvider IQueryable.Provider
{
get { return _data.AsQueryable().Provider; }
}
IEnumerator IEnumerable.GetEnumerator()
{
return _data.GetEnumerator();
}
IEnumerator<T> IEnumerable<T>.GetEnumerator()
{
return _data.GetEnumerator();
}
}
Once these were created I could use MockObjects to get to them.
Note _dbContextSwitcher is the class created with a Moq that calls the different databases.
var vgsdatabase = new Mock<IVGSContext>();
var settings=new FakeCoreDbSet<Setting>();
settings.Add(new Setting()
{
SettingID = "OrgPrivacy",
PK_Setting = Guid.NewGuid(),
UserID = "",
Value = "No"
});
vgsdatabase.Setup(s => s.Setting).Returns(settings);
_dbcontextSwitcher.Setup(s => s.GetDatabase(It.IsAny<string>())).Returns(vgsdatabase.Object);
I am using aspnetboilerplate template
i have a student service class. i am getting a student profile List from stored procedure. how can i call a stored procedure in aspnetboilerplate template
public class StudentRepository : TabonoRepositoryBase<User, long>
{
private readonly IActiveTransactionProvider _transactionProvider;
public StudentRepository(IDbContextProvider<TabonoDbContext> dbContextProvider, IActiveTransactionProvider transactionProvider)
: base(dbContextProvider)
{
_transactionProvider = transactionProvider;
}
//TODO: Make async!
public async Task<int> GetProfileCompletePercentage(int studentid)
{
EnsureConnectionOpen();
using (var command = CreateCommand("Sp_GetStudentprofilepercentage", CommandType.StoredProcedure, new SqlParameter("StudentId", studentid)))
{
using (var dataReader = await command.ExecuteReaderAsync())
{
while (dataReader.Read())
{
return Convert.ToInt16(dataReader["TotalPer"].ToString());
}
return 0;
}
}
}
private DbCommand CreateCommand(string commandText, CommandType commandType, params SqlParameter[] parameters)
{
var command = Context.Database.GetDbConnection().CreateCommand();
command.CommandText = commandText;
command.CommandType = commandType;
command.Transaction = GetActiveTransaction();
foreach (var parameter in parameters)
{
command.Parameters.Add(parameter);
}
return command;
}
private void EnsureConnectionOpen()
{
var connection = Context.Database.GetDbConnection();
if (connection.State != ConnectionState.Open)
{
connection.Open();
}
}
private DbTransaction GetActiveTransaction()
{
return (DbTransaction)_transactionProvider.GetActiveTransaction(new ActiveTransactionProviderArgs
{
{"ContextType", typeof(TabonoDbContext) },
{"MultiTenancySide", MultiTenancySide }
});
}
}
And this is the service class
public class StudentService : AsyncCrudAppService<StudentCore, StudentDto, int, PagedResultRequestDto, StudentCreateDto, StudentUpdateDto>, IStudentService
{
public readonly IRepository<StudentCore> _studentRepository;
private readonly UserManager _userManager;
private readonly IStudentService _studentservice;
public StudentService(IRepository<StudentCore> repository, UserManager um, IStudentService studentservice) : base(repository)
{
_studentRepository = repository;
_userManager = um;
_studentservice = studentservice;
}
public Task GetProfileCompletePercentage(int studentid)
{
return _studentservice.GetProfileCompletePercentage(studentid);
}
}
Create an interface:
public interface IStudentRepository : IRepository<StudentCore>
{
Task<int> GetProfileCompletePercentage(int studentid);
}
Implement the interface:
public class StudentRepository : TabonoRepositoryBase<StudentCore>, IStudentRepository
{
// ...
}
Inject the interface and call the method:
public class StudentService : ...
{
private readonly IStudentRepository _studentRepository;
public StudentService(IStudentRepository repository) : base(repository)
{
_studentRepository = repository;
}
public Task GetProfileCompletePercentage(int studentid)
{
return _studentRepository.GetProfileCompletePercentage(studentid);
}
}
Note: StudentService must not inject IStudentService in constructor → infinite recursion!
For reference: https://www.codeproject.com/Articles/1199648/Using-Stored-Procedure-User-Defined-Function-and-V
I'm trying to use the MvvmCross Messenger plugin, but I simple get it to work.. it always return a "Null Reference Exception".
Here is the BaseViewModel I created to test it:
namespace TestProject.Core.ViewModels
{
public class BaseViewModel : MvxViewModel
{
private readonly IMvxMessenger _messenger;
public BaseViewModel(IMvxMessenger messenger)
{
messenger = _messenger;
}
public IMvxCommand TestMessageCommand
{
get { return new MvxCommand(DoTestMessage); }
}
private void DoTestMessage()
{
var message = new TestMessage(this, "Potato");
_messenger.Publish(message);
}
}
}
Here is the other ViewModel that should receive the message:
namespace TestProject.Core.ViewModels
{
public class HomeViewModel : MvxViewModel
{
private string _testMessage = string.Empty;
private readonly MvxSubscriptionToken _token;
public HomeViewModel(IMvxMessenger messenger)
{
_token = messenger.Subscribe<TestMessage>(OnTestMessage);
}
private void OnTestMessage(OnTestMessage testMessage)
{
_testMessage = testMessage.Result;
}
public ICommand ShowBasePageCommand
{
get { return new MvxCommand(() => ShowViewModel<BaseViewModel>()); }
}
}
}
And finally, here is the message:
namespace TestProject.Core.Messages
{
public class TestMessage
: MvxMessage
{
public QRCodeResultMessage(object sender, string result) : base(sender)
{
Result = result;
}
public string Result { get; private set; }
}
}
I bound a button on the HomePage to the "ShowBasePageCommand", and on the BasePage there is another button bound to the "TestMessageCommand".
Full Exception:
System.NullReferenceException: Object reference not set to an nstance of an object.
at TestProject.Core.ViewModels.BaseViewModel.DoTestMessage () [0x00014] in /Users/diegopatrocinio/Projects/Xamarin/TestProject/TestProject.Core/ViewModels/BaseViewModel.cs:49
at MvvmCross.Core.ViewModels.MvxCommand.Execute (System.Object parameter) [0x00009] in <69bce0378e8e413982d3b552d7e387a8>:0
at Xamarin.Forms.Button.Xamarin.Forms.IButtonController.SendClicked () [0x0000a] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Core\Button.cs:121
at Xamarin.Forms.Platform.Android.ButtonRenderer+ButtonClickListener.OnClick (Android.Views.View v) [0x0000f] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.Android\Renderers\ButtonRenderer.cs:303
at Android.Views.View+IOnClickListenerInvoker.n_OnClick_Landroid_view_View_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_v) [0x00011] in /Users/builder/data/lanes/4009/3a62f1ea/source/monodroid/src/Mono.Android/platforms/android-25/src/generated/Android.Views.View.cs:1857
at at (wrapper dynamic-method) System.Object:1b16fb3a-f768-4a9f-8e2e-60f0085ed7fb (intptr,intptr,intptr)
Stack:
System.Diagnostics.Debugger.Mono_UnhandledException_internal() in
System.Diagnostics.Debugger.Mono_UnhandledException(System.NullReferenceException ex) in /Users/builder/data/lanes/4009/3a62f1ea/source/mono/mcs/class/corlib/System.Diagnostics/Debugger.cs:122
object.1b16fb3a-f768-4a9f-8e2e-60f0085ed7fb( arg0, arg1, arg2) in
TestProject.Core.ViewModels.BaseViewModel.DoTestMessage() in /Users/diegopatrocinio/Projects/Xamarin/TestProject/TestProject.Core/ViewModels/BaseViewModel.cs:49
Please note that your constructor has inverted the parameter and the class member:
public BaseViewModel(IMvxMessenger messenger)
{
messenger = _messenger;
}
Should be
public BaseViewModel(IMvxMessenger messenger)
{
_messenger = messenger;
}
Lets say I have a simple repository class, with one GetByNames method
public class MyRepo
{
private readonly MyDbContext _db;
public MyRepo(MyDbContext db)
{
_db = db;
}
public IQueryable<MyObject> GetByNames(IList<string> names)
{
if (names== null || !names.Any())
{
return Enumerable.Empty<MyObject>().AsQueryable();
}
return _db.MyObjects.Where(a => names.Contains(a.Name));
}
}
Now when I use it with async EntityFramework ToListAsync() extension
var myObjects = awawit new MyRepo(_db).GetByNames(names).ToListAsync();
It will blow up if I pass in empty list or null because Enumerable.Empty<MyObject>().AsQueryable() does not implement IDbAsyncEnumerable<MyObject> interface.
The source IQueryable doesn't implement IDbAsyncEnumerable. Only sources that implement IDbAsyncEnumerable can be used for Entity Framework asynchronous operations. For more details see http://go.microsoft.com/fwlink/?LinkId=287068.
So my question is, how can I return an empty IQueryable<> that implements IDbAsyncEnumerable, without hitting the database?
I ended up implementing an extension method that returns wrapper which implements IDbAsyncEnumerable. It is based on this boilerplate implementation for mocking async code.
With this extension method I can use
return Enumerable.Empty<MyObject>().AsAsyncQueryable();
which works great.
Implementation:
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data.Entity.Infrastructure;
using System.Linq;
using System.Linq.Expressions;
using System.Threading;
using System.Threading.Tasks;
namespace MyProject.MyDatabase.Extensions
{
public static class EnumerableExtensions
{
public static IQueryable<T> AsAsyncQueryable<T>(this IEnumerable<T> source)
{
return new AsyncQueryableWrapper<T>(source);
}
public static IQueryable<T> AsAsyncQueryable<T>(this IQueryable<T> source)
{
return new AsyncQueryableWrapper<T>(source);
}
}
internal class AsyncQueryableWrapper<T>: IDbAsyncEnumerable<T>, IQueryable<T>
{
private readonly IQueryable<T> _source;
public AsyncQueryableWrapper(IQueryable<T> source)
{
_source = source;
}
public AsyncQueryableWrapper(IEnumerable<T> source)
{
_source = source.AsQueryable();
}
public IDbAsyncEnumerator<T> GetAsyncEnumerator()
{
return new AsyncEnumerator<T>(this.AsEnumerable().GetEnumerator());
}
IDbAsyncEnumerator IDbAsyncEnumerable.GetAsyncEnumerator()
{
return GetAsyncEnumerator();
}
public IEnumerator<T> GetEnumerator()
{
return _source.GetEnumerator();
}
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
public Expression Expression => _source.Expression;
public Type ElementType => _source.ElementType;
public IQueryProvider Provider => new AsyncQueryProvider<T>(_source.Provider);
}
internal class AsyncEnumerable<T> : EnumerableQuery<T>, IDbAsyncEnumerable<T>, IQueryable<T>
{
public AsyncEnumerable(IEnumerable<T> enumerable)
: base(enumerable)
{ }
public AsyncEnumerable(Expression expression)
: base(expression)
{ }
public IDbAsyncEnumerator<T> GetAsyncEnumerator()
{
return new AsyncEnumerator<T>(this.AsEnumerable().GetEnumerator());
}
IDbAsyncEnumerator IDbAsyncEnumerable.GetAsyncEnumerator()
{
return GetAsyncEnumerator();
}
IQueryProvider IQueryable.Provider => new AsyncQueryProvider<T>(this);
}
internal class AsyncQueryProvider<TEntity> : IDbAsyncQueryProvider
{
private readonly IQueryProvider _inner;
internal AsyncQueryProvider(IQueryProvider inner)
{
_inner = inner;
}
public IQueryable CreateQuery(Expression expression)
{
var t = expression.Type;
if (!t.IsGenericType)
{
return new AsyncEnumerable<TEntity>(expression);
}
var genericParams = t.GetGenericArguments();
var genericParam = genericParams[0];
var enumerableType = typeof(AsyncEnumerable<>).MakeGenericType(genericParam);
return (IQueryable)Activator.CreateInstance(enumerableType, expression);
}
public IQueryable<TElement> CreateQuery<TElement>(Expression expression)
{
return new AsyncEnumerable<TElement>(expression);
}
public object Execute(Expression expression)
{
return _inner.Execute(expression);
}
public TResult Execute<TResult>(Expression expression)
{
return _inner.Execute<TResult>(expression);
}
public Task<object> ExecuteAsync(Expression expression, CancellationToken cancellationToken)
{
return Task.FromResult(Execute(expression));
}
public Task<TResult> ExecuteAsync<TResult>(Expression expression, CancellationToken cancellationToken)
{
return Task.FromResult(Execute<TResult>(expression));
}
}
internal class AsyncEnumerator<T> : IDbAsyncEnumerator<T>
{
private readonly IEnumerator<T> _inner;
public AsyncEnumerator(IEnumerator<T> inner)
{
_inner = inner;
}
public void Dispose()
{
_inner.Dispose();
}
public Task<bool> MoveNextAsync(CancellationToken cancellationToken)
{
return Task.FromResult(_inner.MoveNext());
}
public T Current => _inner.Current;
object IDbAsyncEnumerator.Current => Current;
}
}
If you don't want to hit the DB, you'll most likely have to provide your own implementation of empty IQuerable that implements IDbAsyncEnumerable. But I don't think it is too hard. In all the enumerators just return null for Current and false for MoveNext. In Dispose just do nothing. Try it. Enumerable.Empty<MyObject>().AsQueryable() has nothing to do with database, it definitely does not implement IDbAsyncEnumerable. You need an implementation that does, according to this.
I had the same problem, and didn't figure out what was happening, but I could solve the issue with this:
public IQueryable<MyObject> GetByNames(IList<string> names)
{
if (names?.Any() != true)
{
return _db.Set<MyObject>().Take(0);
//! or
return _db.MyObjects.Take(0);
}
...
}
I am having a model not in EF, but in plain text. I have to have the updated events handled for each of the model's properties so that i can log their changes.
Is there a way for this to be achieved.
Implement the INotifyPropertyChanged interface.
A simple example:
using System.ComponentModel;
public class MyModel : INotifyPropertyChanged
{
string _myProperty;
public event PropertyChangedEventHandler PropertyChanged;
public string MyProperty
{
get { return _myProperty; }
set
{
_myProperty = value;
NotifyPropertyChanged("MyProperty");
}
}
public void NotifyPropertyChanged(string info)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(info));
}
}
}
You can use it like...
public class Test
{
public static void Main()
{
var model = new MyModel();
model.PropertyChanged += new PropertyChangedEventHandler(LogChange);
model.MyProperty="apples";
model.MyProperty="oranges";
model.MyProperty="pears";
}
public static void LogChange(object sender, PropertyChangedEventArgs args)
{
Console.WriteLine(args.PropertyName + " has changed!");
Console.WriteLine("New value: "
+ sender.GetType().GetProperty(args.PropertyName)
.GetValue(sender, null));
}
}