public void CreateNewProjectWithPhotograph()
{
var dbContextScopeFactory = new DbContextScopeFactory();
var ambientDbContextLocator = new AmbientDbContextLocator();
var projectRepository = new ProjectRepository(ambientDbContextLocator);
var photographs = new List<Photograph>();
photographs.Add(new Photograph {
Location="home",
Title="photo title"
});
photographs.Add(new Photograph
{
Location = "home2",
Title = "photo title2"
});
var projectService = new ProjectServices(dbContextScopeFactory, projectRepository);
Project project = new Project
{
Description = "test",
Title = "Test title",
Photographs = photographs
};
projectService.CreateProject(project);
}
public void DeletePhotograph()
{
CreateANewPhotograph();
var dbContextScopeFactory = new DbContextScopeFactory();
var ambientDbContextLocator = new AmbientDbContextLocator();
var photographRepository = new PhotographRepository(ambientDbContextLocator);
var photographService = new PhotographServices(dbContextScopeFactory, photographRepository);
//var userQueryService = new UserQueryService(dbContextScopeFactory, userRepository);
//var userEmailService = new UserEmailService(dbContextScopeFactory);
//var userCreditScoreService = new UserCreditScoreService(dbContextScopeFactory);
Assert.IsTrue(photographService.RemovePhotography((new Photograph { PhotographId = Guid.Empty })));
}
public void CreateANewPhotograph()
{
var dbContextScopeFactory = new DbContextScopeFactory();
var ambientDbContextLocator = new AmbientDbContextLocator();
var photographRepository = new PhotographRepository(ambientDbContextLocator);
var photographService = new PhotographServices(dbContextScopeFactory, photographRepository);
//var userQueryService = new UserQueryService(dbContextScopeFactory, userRepository);
//var userEmailService = new UserEmailService(dbContextScopeFactory);
//var userCreditScoreService = new UserCreditScoreService(dbContextScopeFactory);
Photograph newPhoto = new Photograph();
newPhoto.Location = "testlocation";
Assert.IsTrue(photographService.UploadPhotography(newPhoto));
Guid uploadID = newPhoto.PhotographId;
Assert.IsTrue(photographService.RemovePhotography(newPhoto));
}
public IDbContextReadOnlyScope GetReadOnlyContextScope(DbContextScopeOption joiningOption = DbContextScopeOption.JoinExisting)
{
var dbContextScopeFactory = new DbContextScopeFactory(site: _site);
return(dbContextScopeFactory.CreateReadOnly(joiningOption));
}
public void GetAllPhotograph()
{
var dbContextScopeFactory = new DbContextScopeFactory();
var ambientDbContextLocator = new AmbientDbContextLocator();
var photographRepository = new PhotographRepository(ambientDbContextLocator);
var photographService = new PhotographServices(dbContextScopeFactory, photographRepository);
var photo = photographService.GetAllPhotographs();
//foreach (var photograph in photo)
//{
// var tempt = photograph.Title;
// foreach(var tempphot in photograph.Projects)
// {
// var t = tempphot.Title;
// }
//}
Assert.IsNotNull(photo);
}
public void GetAPhotograph()
{
var dbContextScopeFactory = new DbContextScopeFactory();
var ambientDbContextLocator = new AmbientDbContextLocator();
var photographRepository = new PhotographRepository(ambientDbContextLocator);
var photographService = new PhotographServices(dbContextScopeFactory, photographRepository);
//var userQueryService = new UserQueryService(dbContextScopeFactory, userRepository);
//var userEmailService = new UserEmailService(dbContextScopeFactory);
//var userCreditScoreService = new UserCreditScoreService(dbContextScopeFactory);
var photo = photographService.GetPhotograph(new Guid("9a1f9e3e-b389-e511-9c5a-00249b0905d8"));
foreach (var photographInProject in photo.Projects)
{
foreach (var actualPhoto in photographInProject.Photographs)
{
string a= actualPhoto.Title;
}
}
var photo2 = photographService.GetPhotograph(new Guid("1a1f9e3e-b389-e511-9c5a-00249b0905d8"));
Assert.IsNotNull(photo);
}
static void Main(string[] args)
{
//-- Poor-man DI - build our dependencies by hand for this demo
var dbContextScopeFactory = new DbContextScopeFactory();
var ambientDbContextLocator = new AmbientDbContextLocator();
var userRepository = new UserRepository(ambientDbContextLocator);
var userCreationService = new UserCreationService(dbContextScopeFactory, userRepository);
var userQueryService = new UserQueryService(dbContextScopeFactory, userRepository);
var userEmailService = new UserEmailService(dbContextScopeFactory);
var userCreditScoreService = new UserCreditScoreService(dbContextScopeFactory);
try
{
Console.WriteLine("This demo application will create a database named DbContextScopeDemo in the default SQL Server instance on localhost. Edit the connection string in UserManagementDbContext if you'd like to create it somewhere else.");
Console.WriteLine("Press enter to start...");
Console.ReadLine();
//-- Demo of typical usage for read and writes
Console.WriteLine("Creating a user called Mary...");
var marysSpec = new UserCreationSpec("Mary", "*****@*****.**");
userCreationService.CreateUser(marysSpec);
Console.WriteLine("Done.\n");
Console.WriteLine("Trying to retrieve our newly created user from the data store...");
var mary = userQueryService.GetUser(marysSpec.Id);
Console.WriteLine("OK. Persisted user: {0}", mary);
Console.WriteLine("Press enter to continue...");
Console.ReadLine();
//-- Demo of nested DbContextScopes
Console.WriteLine("Creating 2 new users called John and Jeanne in an atomic transaction...");
var johnSpec = new UserCreationSpec("John", "*****@*****.**");
var jeanneSpec = new UserCreationSpec("Jeanne", "*****@*****.**");
userCreationService.CreateListOfUsers(johnSpec, jeanneSpec);
Console.WriteLine("Done.\n");
Console.WriteLine("Trying to retrieve our newly created users from the data store...");
var createdUsers = userQueryService.GetUsers(johnSpec.Id, jeanneSpec.Id);
Console.WriteLine("OK. Found {0} persisted users.", createdUsers.Count());
Console.WriteLine("Press enter to continue...");
Console.ReadLine();
//-- Demo of nested DbContextScopes in the face of an exception.
// If any of the provided users failed to get persisted, none should get persisted.
Console.WriteLine("Creating 2 new users called Julie and Marc in an atomic transaction. Will make the persistence of the second user fail intentionally in order to test the atomicity of the transaction...");
var julieSpec = new UserCreationSpec("Julie", "*****@*****.**");
var marcSpec = new UserCreationSpec("Marc", "*****@*****.**");
try
{
userCreationService.CreateListOfUsersWithIntentionalFailure(julieSpec, marcSpec);
Console.WriteLine("Done.\n");
}
catch (Exception e)
{
Console.WriteLine(e.Message);
Console.WriteLine();
}
Console.WriteLine("Trying to retrieve our newly created users from the data store...");
var maybeCreatedUsers = userQueryService.GetUsers(julieSpec.Id, marcSpec.Id);
Console.WriteLine("Found {0} persisted users. If this number is 0, we're all good. If this number is not 0, we have a big problem.", maybeCreatedUsers.Count());
Console.WriteLine("Press enter to continue...");
Console.ReadLine();
//-- Demo of DbContextScope within an async flow
Console.WriteLine("Trying to retrieve two users John and Jeanne sequentially in an asynchronous manner...");
// We're going to block on the async task here as we don't have a choice. No risk of deadlocking in any case as console apps
// don't have a synchronization context.
var usersFoundAsync = userQueryService.GetTwoUsersAsync(johnSpec.Id, jeanneSpec.Id).Result;
Console.WriteLine("OK. Found {0} persisted users.", usersFoundAsync.Count());
Console.WriteLine("Press enter to continue...");
Console.ReadLine();
//-- Demo of explicit database transaction.
Console.WriteLine("Trying to retrieve user John within a READ UNCOMMITTED database transaction...");
// You'll want to use SQL Profiler or Entity Framework Profiler to verify that the correct transaction isolation
// level is being used.
var userMaybeUncommitted = userQueryService.GetUserUncommitted(johnSpec.Id);
Console.WriteLine("OK. User found: {0}", userMaybeUncommitted);
Console.WriteLine("Press enter to continue...");
Console.ReadLine();
//-- Demo of disabling the DbContextScope nesting behaviour in order to force the persistence of changes made to entities
// This is a pretty advanced feature that you can safely ignore until you actually need it.
Console.WriteLine("Will simulate sending a Welcome email to John...");
using (var parentScope = dbContextScopeFactory.Create())
{
var parentDbContext = parentScope.DbContexts.Get<UserManagementDbContext>();
// Load John in the parent DbContext
var john = parentDbContext.Users.Find(johnSpec.Id);
Console.WriteLine("Before calling SendWelcomeEmail(), john.WelcomeEmailSent = " + john.WelcomeEmailSent);
// Now call our SendWelcomeEmail() business logic service method, which will
// update John in a non-nested child context
userEmailService.SendWelcomeEmail(johnSpec.Id);
// Verify that we can see the modifications made to John by the SendWelcomeEmail() method
Console.WriteLine("After calling SendWelcomeEmail(), john.WelcomeEmailSent = " + john.WelcomeEmailSent);
// Note that even though we're not calling SaveChanges() in the parent scope here, the changes
// made to John by SendWelcomeEmail() will remain persisted in the database as SendWelcomeEmail()
// forced the creation of a new DbContextScope.
}
Console.WriteLine("Press enter to continue...");
Console.ReadLine();
//-- Demonstration of DbContextScope and parallel programming
Console.WriteLine("Calculating and storing the credit score of all users in the database in parallel...");
userCreditScoreService.UpdateCreditScoreForAllUsers();
Console.WriteLine("Done.");
}
catch (Exception e)
{
Console.WriteLine(e);
}
Console.WriteLine();
Console.WriteLine("The end.");
Console.WriteLine("Press enter to exit...");
Console.ReadLine();
}
