I started porting windows phone 7 application to windows 8, They are using IApplicationService inherited class for start an stop services. How i can achieve the same in windows 8. I am attaching the windows phone code below. Please help me. Its a blocking section seems bit difficult.
public class ApplicationService : IApplicationService
{
private IApplicationService _logger;
private IApplicationService _dataSourceManager;
public void StartService(ApplicationServiceContext context)
{
_logger = new Logger();
_dataSourceManager = new DataSourceManager();
_logger.StartService(context);
_dataSourceManager.StartService(context);
}
private IApplicationService LoadService(string assemblyName, string typename)
{
var parts = Deployment.Current.Parts;
if (parts.Any(part => part.Source.StartsWith(assemblyName)))
{
var assembly = Assembly.Load(assemblyName);
Type type = assembly.GetType(typename);
return Activator.CreateInstance(type, new[] {
SynchronizationContext.Current }) as IApplicationService;
}
return null;
}
public void StopService()
{
Current.StopService();
_dataSourceManager.StopService();
_logger.StopService(); // stop last because other services depend on it
_logger = null;
_dataSourceManager = null;
}
}
Related
No way to reset password in umbraco 8.
I have searched all solutions in umbraco forum & stack overflow.
Trying solution in https://our.umbraco.com/forum/extending-umbraco-and-using-the-api/91117-how-does-umbraco-hash-member-passwords-and-for-a-bonus-can-i-create-a-member-using-a-hashed-password but nothing.
Create a class as below and run the project:
using System.Web.Security;
using Umbraco.Core.Composing;
using Umbraco.Core;
using Umbraco.Core.Services;
using Umbraco.Web.Security.Providers;
namespace Project
{
[RuntimeLevel(MinLevel = RuntimeLevel.Run)]
public class StartingComposer : IUserComposer
{
public void Compose(Composition composition)
{
composition.Components().Append<StartingEvent>();
}
}
public class StartingEvent : IComponent
{
private readonly IUserService _userService;
public StartingEvent(IUserService userService)
{
_userService = userService;
var adminUser = _userService.GetUserById(-1);
adminUser.Username = adminUser.Email = "admin#gmail.com";
adminUser.FailedPasswordAttempts = 0;
adminUser.IsLockedOut = false;
adminUser.IsApproved = true;
adminUser.RawPasswordValue = (Membership.Providers["UsersMembershipProvider"] as UsersMembershipProvider)?.HashPasswordForStorage("Admin123*");
userService.Save(adminUser);
}
public void Initialize()
{
}
public void Terminate()
{
}
}
}
I have a ASP NET Core application that will serve as a RabbitMQ producer.I have read the tutorial and guides regarding the RabbitMQ .NET client and i still do not know how to deal with the channel lifetime and concurrent access.
From what i have read i understood the following:
IConnection is threadsafe ,but is costly to create
IModel is not threadsafe but is lightweight
For the IConnection i would initialize it in the Startup and inject it as a singleton (service).
However i I do not know how to deal with IModel management.Lets say i have a couple of services that use it, is it scalable to just :
Solution 1
public void Publish(IConnection connection)
{
using(IModel model=connection.CreateChannel())
{
model.BasicPublish(...);
}
}
Solution 2
From what i have read , i understood that its not really scalable.
So another solution would be to create a separate service which would contain a loop , a ConcurrentQueue, and all services would dispatch messages here.
This service would be the sole publisher to RabbitMQ
Publisher
public class Publisher
{
private CancellationTokenSource tcs=new CancellationTokenSource();
public BlockingCollection<byte[]> messages=new BlockingCollection<byte[]>();
private IModel channel;
private readonly string ExchangeName;
private Task loopTask;
public void Run()
{
this.loopTask=Task.Run(()=>Loop(tcs.Token),tcs.Token);
}
private void Loop(Cancellation token)
{
while(true)
{
token.ThrowIfCancellationRequested();
queue.Take(out byte[]data);
channel.BasicPublish(...,body:data);
}
}
public void Publish(byte[] message)
{
this.queue.Add(message);
}
}
Usage
public class SomeDIService
{
private IConnection connection;
SomeDIService(Publisher publisher)
{
this.publisher=publisher;
}
public void DoSomething(byte[] data)
{
//do something...
this.publisher.Publish(data);
}
}
I would prefer solution 1 but i do not know the performance penalty ,while i do not like solution 2 since i wanted to just publish messages directly to RabbitMQ.Now i have to deal with this long running Task too.
Is there any other solution , am i missing something ? Is there a simpler way?
Update
I mentioned concurrent access.I meant i need a way to publish messages from multiple endpoints (services) to RabbitMQ.
Real scenario
public class Controller1:Controller
{
private SomeDIService service; //uses Publisher
[HttpGet]
public void Endpoint1()
{
this.service.DoSomething();
}
[HttpPost]
public void Endpoint2()
{
this.service.DoSomething();
}
}
public class Controller2:Controller
{
private SomeDIService service;
[HttpGet]
public void Endpoint3()
{
this.service.DoSomething();
}
[HttpPost]
public void Endpoint4()
{
this.service.DoSomething();
}
}
after searching for long time i found this solution and it works very good for me
using Microsoft.Extensions.Options;
using RabbitMQ.Client;
using System;
using System.Collections.Generic;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
namespace BSG.MessageBroker.RabbitMQ
{
public class Rabbit : IRabbit
{
private readonly EnvConfigModel EnvConfig;
private readonly string _hostname;
private readonly string _password;
private readonly string _exchangeName;
private readonly string _username;
private IConnection _connection;
private IModel _Model;
public Rabbit(IOptions<EnvConfigModel> appSettings)
{
EnvConfig = appSettings.Value;
_Logger = services;
_exchangeName = EnvConfig.Rabbit_ExchangeName;
_hostname = EnvConfig.Rabbit_Host;
_username = EnvConfig.Rabbit_Username;
_password = EnvConfig.Rabbit_Password;
CreateConnection();
_Model = _connection.CreateModel();
}
private void CreateConnection()
{
try
{
var factory = new ConnectionFactory
{
HostName = _hostname,
UserName = _username,
Password = _password,
AutomaticRecoveryEnabled = true,
TopologyRecoveryEnabled = true,
NetworkRecoveryInterval = TimeSpan.FromSeconds(3)
};
_connection = factory.CreateConnection();
}
catch (Exception ex)
{
Console.WriteLine($"Could not create connection: {ex.Message}");
}
}
private bool ConnectionExists()
{
if (_connection != null)
{
return true;
}
CreateShredderConnection();
return _connection != null;
}
public bool PushToQueue(string Message)
{
try
{
if (ConnectionExists())
{
byte[] body = Encoding.UTF8.GetBytes(JsonSerializer.Serialize(Message));
_Model.BasicPublish(exchange: _exchangeName,
routingKey: 1001,
basicProperties: null,
body: body);
}
return true;
}
catch (Exception ex)
{
return false;
}
}
}
}
I am trying to grasp the fundamentals of raising/handling a Domain Event in my Solution. I am using Visual Studio 2017, .Net Core 1.1, C#, StructureMap 4.5.1.
The failure in my code came to light in a Unit Test which failed when checking if my Domain Event was being raised correctly.
My Startup.cs class includes the following code:
public IServiceProvider ConfigureServices(IServiceCollection services)
{
services.AddSingleton(_config);
services.AddAutoMapper();
services.AddMvc()
.AddControllersAsServices();
return ConfigureIoC(services);
}
public IServiceProvider ConfigureIoC(IServiceCollection services)
{
var container = new Container();
container.Configure(config =>
{
config.Scan(scan =>
{
scan.AssemblyContainingType(typeof(Startup));
scan.Assembly("Shared");
scan.Assembly("TaskScheduling");
scan.Assembly("TaskScheduling_Tests");
scan.WithDefaultConventions();
scan.ConnectImplementationsToTypesClosing(typeof(IHandle<>));
});
//Populate the container using the service collection
config.Populate(services);
});
return container.GetInstance<IServiceProvider>();
}
Where possible I have been following Udi Dahan's approach Domain Events - Salvation
My DomainEvents class implements the following Interface:
using System;
namespace Shared.Interfaces
{
public interface IDomainEvent
{
DateTime DateTimeEventOccurred { get; }
}
}
The DomainEvents class is as follows:
using System;
using System.Collections.Generic;
using Shared.Interfaces;
using StructureMap;
namespace Shared
{
/// <summary>
/// http://udidahan.com/2009/06/14/domain-events-salvation/
/// http://msdn.microsoft.com/en-gb/magazine/ee236415.aspx#id0400046
///
/// This class registers Domain Events and makes sure they get called.
/// </summary>
public static class DomainEvents
{
[ThreadStatic]
private static List<Delegate> actions;
public static IContainer Container { get; set; }
// Registers a callback for the given domain event.
public static void Register<T>(Action<T> callback) where T : IDomainEvent
{
if (actions == null)
{
actions = new List<Delegate>();
}
actions.Add(callback);
}
// Clears callbacks passed to Register on the current thread.
public static void ClearCallbacks()
{
actions = null;
}
// Raises the given domain event.
public static void Raise<T>(T args) where T : IDomainEvent
{
foreach (var handler in Container.GetAllInstances<IHandle<T>>())
{
handler.Handle(args);
}
if (actions != null)
{
foreach (var action in actions)
{
if (action is Action<T>)
{
((Action<T>)action)(args);
}
}
}
}
}
}
I have a Task class which when updated raises a TaskUpdatedEvent. The TaskUpdatedEvent class is as follows:
using Shared.Interfaces;
using System;
namespace TaskScheduling.Model.Events
{
public class TaskUpdatedEvent : IDomainEvent
{
/// <summary>
/// When creating a TaskUpdatedEvent you have to pass in the Task object.
/// </summary>
/// <param name="task"></param>
public TaskUpdatedEvent(ScheduleAggregate.Task task)
: this()
{
TaskUpdated = task;
}
public TaskUpdatedEvent()
{
this.Id = Guid.NewGuid();
DateTimeEventOccurred = DateTime.Now; // IDomainEvent interface requirement.
}
public Guid Id { get; private set; }
public DateTime DateTimeEventOccurred { get; private set; }
public ScheduleAggregate.Task TaskUpdated { get; private set; }
}
}
and the event is raised with the following lines in my Task class:
var taskUpdatedEvent = new TaskUpdatedEvent(this);
DomainEvents.Raise(taskUpdatedEvent);
I only have one Unit Test, so far, to check if this event is being raised. The Unit Test is as follows:
using System;
using NUnit.Framework;
using Shared;
using TaskScheduling.Model.ScheduleAggregate;
using TaskScheduling.Model.Events;
namespace TaskScheduling_Tests
{
[TestFixture]
public class TaskUpdatedEventShould
{
private Task testTask;
private readonly Guid testScheduleId = Guid.NewGuid();
private const int TestLocationId = 567;
private const int TestDeviceId = 123;
private const int TestTaskTypeId = 1;
private readonly DateTime testStartTime = new DateTime(2014, 7, 1, 9, 0, 0);
private readonly DateTime testEndTime = new DateTime(2014, 7, 1, 9, 30, 0);
private readonly DateTimeRange newTaskTimeRange = new DateTimeRange(new DateTime(2014, 6, 9, 10, 0, 0), TimeSpan.FromHours(1));
private const string TestTitle = "Unit Test Title";
[SetUp]
public void SetUp()
{
DomainEvents.ClearCallbacks();
testTask = Task.Create(
testScheduleId,
TestLocationId,
TestDeviceId,
TestTaskTypeId,
testStartTime,
testEndTime,
TestTitle
);
}
[Test]
public void EntityConstructor_IsNot_Null()
{
Assert.IsNotNull(testTask);
}
[Test]
public void RaiseTaskUpdatedEvent()
{
// Arrange
Guid updatedAppointmentId = Guid.Empty;
DomainEvents.Register<TaskUpdatedEvent>(aue =>
{
// This defines happens when the event is raised/
// The 'updatedAppointmentId' is changed from being all zeros to the testTask's id value.
updatedAppointmentId = testTask.Id;
});
// Act
testTask.UpdateTime(newTaskTimeRange);
// Assert
Assert.AreEqual(testTask.Id, updatedAppointmentId);
}
}
}
The failure appears to occur in the DomainEvent class when the Raise method is called. Debugging shows that the event is raised and the arguments are set, however the Container is Null so the foreach loop cannot check for handlers.
I cannot figure out why the Container is Null but I'm sure I must be missing something obvious. Any suggestions welcome.
I have a WCF Service written in Visual Studio 2015 (c#) that uses web sockets, this means the endpoint is configured with netHTTPBindings. I have a Delphi application that I have currently written in XE and would like to consume the WCF Service, what is the best way for a Delphi application to consume a web socket WCF Service?
// Edit ---------------------------------------------------------------------------
I am now using wsDualHttpBindings, here is some prototype code:
WCF Service interface
[ServiceContract(CallbackContract = typeof(IStatusCallback))]
public interface IStatusService
{
[OperationContract(IsOneWay = true)]
Task StartSendingStatus();
}
[ServiceContract]
public interface IStatusCallback
{
[OperationContract(IsOneWay = true)]
Task SendStatus(string aValue);
}
Implementation
public class StatusService : IStatusService
{
public async Task StartSendingStatus()
{
var callback = OperationContext.Current.GetCallbackChannel<IStatusCallback>();
while (((IChannel)callback).State == CommunicationState.Opened)
{
await callback.SendStatus(GetStatus());
await Task.Delay(1000);
}
}
private string GetStatus()
{
// For now return datetime
string dt = DateTime.UtcNow.ToString();
return Convert.ToString(dt);
}
}
Here is how I consume it in a C# application, I put the result into list box.
public partial class ClientForm : Form
{
private StatusServiceReference.StatusServiceClient StatusService;
private class CallbackHandler : StatusServiceReference.IStatusServiceCallback
{
private ListBox _listbox;
public CallbackHandler(ListBox aListBox)
{
_listbox = aListBox;
}
public void SendStatus(string aValue)
{
_listbox.Items.Add(aValue);
_listbox.SelectedIndex = _listbox.Items.Count - 1;
}
}
public ClientForm()
{
InitializeComponent();
var context = new InstanceContext(new CallbackHandler(StatusListBox));
StatusService = new StatusServiceReference.StatusServiceClient(context);
}
private void StatusBtn_Click(object sender, EventArgs e)
{
StatusService.StartSendingStatus();
}
}
This works fine, I would like to know the best way to do the above client code in Delphi. When I import the WSDL file it does not have the IStatusServiceCallback interface.
I have a MVC4 .Net web application on 3-tier architecture with Unity dependency injection, and I want to shedule everyday a verficiation and send some mails where is the case. For this I want to use Quartz Scheduler in Application_start, because of the dependency injection windows service is not a good option.
Here is my code in application_start.
// construct a scheduler factory
ISchedulerFactory schedFact = new StdSchedulerFactory();
IScheduler sched = schedFact.GetScheduler();
sched.Start();
IJobDetail dailyUserMailJob = new JobDetailImpl("DailyUserMailJob", null, typeof(SchedulerJob));
// fire every time I open App/EveryDay
ITrigger dailyUserMailTrigger = new SimpleTriggerImpl("DailyUserMailTrigger", 1,
new TimeSpan(1, 0, 0, 0));
sched.ScheduleJob(dailyUserMailJob, dailyUserMailTrigger);
Here is my job code :
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using EvaluationMvc.Bll.Contracts;
using Quartz;
using Quartz.Impl;
namespace EvaluationMvc.Utils
{
public class SchedulerJob : IJob
{
private IEvaluationBus _iEvaluationBus;
public SchedulerJob(IEvaluationBus iEvaluationBus)
{
//Dependency injection
_iEvaluationBus = iEvaluationBus;
}
public void Execute(IJobExecutionContext context)
{
_iEvaluationBus.testingArchitecture();
// Sends a test mail.
}
}
}
However my job is never executed, what could be the problem ?
Quartz.net Scheduler must be created as singleton.
You can install Unity.MVC4 NuGet Package.
It will create a Bootstrapper class which should look something like this:
public static class Bootstrapper
{
public static IUnityContainer Initialise()
{
var container = BuildUnityContainer();
DependencyResolver.SetResolver(new UnityDependencyResolver(container));
return container;
}
private static IUnityContainer BuildUnityContainer()
{
var container = new UnityContainer();
// Register your interfaces here.
RegisterTypes(container);
return container;
}
public static void RegisterTypes(IUnityContainer container)
{
}
}
Then you have to create your own implementation of JobFactory. This article might help you and this one is worth reading:
public class UnityJobFactory: IJobFactory
{
private readonly IUnityContainer container;
static UnityJobFactory()
{
}
public UnityJobFactory(IUnityContainer container)
{
this.container = container;
}
public IJob NewJob(TriggerFiredBundle bundle, IScheduler scheduler)
{
var jobDetail = bundle.JobDetail;
var jobType = jobDetail.JobType;
try
{
return this.container.Resolve(jobType) as IJob;
}
catch (Exception ex)
{
throw new SchedulerException(string.Format(
CultureInfo.InvariantCulture,
"Cannot instantiate class '{0}'", new object[] { jobDetail.JobType.FullName }), ex);
}
}
public void ReturnJob(IJob job)
{
// Nothing here. Unity does not maintain a handle to container created instances.
}
}
and your own implementation of StdSchedulerFactory:
public class UnitySchedulerFactory : StdSchedulerFactory
{
private readonly UnityJobFactory unityJobFactory;
public UnitySchedulerFactory(UnityJobFactory unityJobFactory)
{
this.unityJobFactory = unityJobFactory;
}
protected override IScheduler Instantiate(QuartzSchedulerResources rsrcs, QuartzScheduler qs)
{
qs.JobFactory = this.unityJobFactory;
return base.Instantiate(rsrcs, qs);
}
}
Going back to your Unity Bootstrapper you have to register your interfaces:
private static IUnityContainer BuildUnityContainer()
{
var container = new UnityContainer();
container.RegisterType<ISchedulerFactory, UnitySchedulerFactory>(new ContainerControlledLifetimeManager());
container.RegisterType<IScheduler>(new InjectionFactory(c => c.Resolve<ISchedulerFactory>().GetScheduler()));
container.RegisterType<IQuartzScheduler, QuartzScheduler>(new ContainerControlledLifetimeManager());
container.RegisterType<IEvaluationBus, EvaluationBus>();
RegisterTypes(container);
return container;
}
I've wrapped up my service scheduler in a class so that I can create it singleton:
public interface IQuartzScheduler
{
void Run();
void Stop();
}
and:
public class QuartzScheduler : IQuartzScheduler
{
private readonly ISchedulerFactory SchedulerFactory;
private readonly IScheduler Scheduler;
public QuartzScheduler(ISchedulerFactory schedulerFactory, IScheduler scheduler)
{
this.SchedulerFactory = schedulerFactory;
this.Scheduler = scheduler;
}
public void Run()
{
IJobDetail dailyUserMailJob = new JobDetailImpl("DailyUserMailJob", null, typeof(Scheduler.SchedulerJob));
// fire every time I open App/EveryDay
ITrigger dailyUserMailTrigger = new SimpleTriggerImpl("DailyUserMailTrigger", 10,
new TimeSpan(0, 0, 0, 20));
this.Scheduler.ScheduleJob(dailyUserMailJob, dailyUserMailTrigger);
this.Scheduler.Start();
}
public void Stop()
{
this.Scheduler.Shutdown(false);
}
}
As you can see in this class I'll create my jobs/trigger and start the scheduler.
now in your Application_Start (global.asax) you can "bootstrap" your Unity Container, get the service scheduler and run it.
var unityContainer = Infrastructure.Bootstrapper.Initialise();
unityContainer.Resolve<IQuartzScheduler>().Run();
You can find a working sample following this link (QuartzWithUnity).
Very useful, thanks LeftyX. I think, in Application_Start you have to create servise like this:
var unityContainer = Bootstrapper.Initialise();
QuartzScheduler jobService = (QuartzScheduler)unityContainer.Resolve(typeof(QuartzScheduler), "Jobs");
jobService.Run();