Emit.ExtensibilityProvider is a component wrapper arround Microsoft MEF(Managed Extensibility Framework).
Functionalities:
- Configure via .config
- Configure via code
- Add Bootstrapper Task via .config/code
- Bootstrapping Tasks before and after instance import
- Offers ConstraintExportAttribute and ConstraintImportAttribute for controlling exports/imports via multiple types
internal class BeforeResolveBootstrapTask : IBootstrapperTask
{
public ExecuteType ExecuteType { get; set; }
public ExecuteMode ExecuteMode { get; set; }
public void ExecuteTask()
{
Console.ForegroundColor = ConsoleColor.Yellow;
var message = string.Format(@"{0}|INFO|Before resolve - one time execution", DateTime.Now);
Console.WriteLine(message);
Console.ResetColor();
}
} <configuration>
<configSections>
<section name="BootstrapperConfiguration" type="Emit.ExtensibilityProvider.Configuration.BootstrapperConfiguration, Emit.ExtensibilityProvider"/>
</configSections>
<BootstrapperConfiguration>
<source useBaseDirectory = "true"/>
<bootstrapperTasks>
<bootstrapperTask name="BootStartedTask"
type="Emit.ExtensibilityDemo.Bootstrap.Tasks.BeforeResolveBootstrapTask, Emit.ExtensibilityDemo"
executeType="Initalize"
executeMode="BeforeBootstrap"/>
</bootstrapperTasks>
</BootstrapperConfiguration>
</configuration> var task = new ViaCodeBootstrapTask();
task.ExecuteMode = ExecuteMode.AfterBootstrap;
task.ExecuteType = ExecuteType.Always;
SystemBootstrapper.AddBoostrappingTask(task);Some class exports:
[Export(typeof(IUserController))]
public class UserControllers : IUserController
{
public void AddUser(string username){}
}
[ConstraintExport(typeof(IAuthController), typeof(IFormsAuthController))]
public class FormsAuthController : IFormsAuthController
{
public void AddUser(string username){}
public bool Login(string username, string password) {}
}
[ConstraintExport(typeof(IAuthController), typeof(IWindowsAuthController))]
public class WindowsAuthController : IWindowsAuthController
{
public void AddUser(string username){}
public bool Login(string username, string password){}
} Some class imports:
public class UserService
{
[Import]
public IUserController UserController { get; set; }
[ConstraintImport(typeof(IWindowsAuthController))]
public IAuthController WindowsAuthController { get; set; }
[ConstraintImport(typeof(IFormsAuthController))]
public IAuthController FormsAuthController { get; set; }
}Context fill:
// fill context with imports
bootstrapper.Execute(userService);
// return instance that implements IUserController
bootstrapper.GetInstance<IUserController>();
// return instance that implements IAuthController and is constrainted by IWindowsAuthController
bootstrapper.GetInstance<IAuthController>(new[] { typeof(IWindowsAuthController) })
// return instance that implements IAuthController and is constrainted by IFormsAuthController
bootstrapper.GetInstance<IAuthController>(new[] { typeof(IFormsAuthController) });