public Blog AddBlog(VoBlog voBlog)
{
var blog = new Blog
{
CreatedDate = voBlog.CreatedDateTime,
UpdatedDate = voBlog.CreatedDateTime,
Overview = voBlog.Overview,
UserId = voBlog.UserId
};
BloggerDbContext.Blogs.Add(blog);
return(blog);
}
public void AddBlog(VoBlog voBlog)
{
//Demonstration of creating an AmbientDbContext in transaction mode
using (var dbContextScope = new DbContextScopeFactory().CreateAmbientDbContextInTransactionMode <BloggerDbContext>())
{
bool exceptionOccured = false;
var user = _userOperations.GetUser(voBlog.UserId);
try
{
Console.WriteLine("BlogPostCreationFailureCount :" + user.BlogPostCreationFailureCount);
var blog = _blogOperations.AddBlog(voBlog);
var post = _postOperations.AddPost(voBlog.Post);
blog.BlogPost = post;
dbContextScope.SaveChanges();
dbContextScope.Commit();
}
catch (Exception)
{
exceptionOccured = true;
throw;
}
finally
{
if (exceptionOccured)
{
var userOperations = new UserOperations();
using (
var nonAmbientdbContextScope =
new DbContextScopeFactory().CreateNonAmbientDbContextInTransactionMode <BloggerDbContext>())
{
//Setting the user operations dbContext with the dbContext from DbContextScope just created
//else we would be using ambient DbContext.
userOperations.UpdateBlogCreationFailureCount(voBlog.UserId);
var updateduser = userOperations.GetUser(voBlog.UserId);
nonAmbientdbContextScope.RefreshParentCacheWithUpdatedEntities(new List <User> {
updateduser
});
Console.WriteLine("BlogPostCreationFailureCount :" + user.BlogPostCreationFailureCount);
}
}
}
}
}
public VoBlog GetBlog(int blogId)
{
//Demonstration of creating an AmbientDbContext in readonly mode
using (new DbContextScopeFactory().CreateAmbientDbContextInReadonlyMode <BloggerDbContext>())
{
var blog = _blogOperations.GetBlog(blogId);
var voBlog = new VoBlog
{
Overview = blog.Overview,
CreatedDateTime = blog.CreatedDate,
PostId = blog.PostId
};
var post = _postOperations.GetPost(blog.PostId);
voBlog.Post = new VoPost
{
Content = post.Content,
Meta = post.Meta,
ShortDescription = post.ShortDescription,
Title = post.Title
};
return(voBlog);
}
}
public VoBlog GetUserRecentBlog(long userId)
{
//Demonstration of creating an AmbientDbContext in readonly mode
using (new DbContextScopeFactory().CreateAmbientDbContextInReadonlyMode <BloggerDbContext>())
{
var userRecentBlog = _blogOperations.GetUserRecentBlog(userId);
var blogDto = new VoBlog
{
CreatedDateTime = userRecentBlog.CreatedDate,
Overview = userRecentBlog.Overview,
PostId = userRecentBlog.PostId
};
var post = _postOperations.GetPost(userRecentBlog.PostId);
blogDto.Post = new VoPost
{
Content = post.Content,
Meta = post.Meta,
ShortDescription = post.ShortDescription,
Title = post.Title
};
return(blogDto);
}
}
static void Main()
{
Console.WriteLine("Creating Database first");
//Creating database first
var dropCreateDatabaseAlways = new DropCreateDatabaseAlways <BloggerDbContext>();
Database.SetInitializer(dropCreateDatabaseAlways);
var context = new BloggerDbContext();
dropCreateDatabaseAlways.InitializeDatabase(context);
//Creating an user
Console.WriteLine("Creating an user");
IUserServices userRepository = new UserServices();
var userId = userRepository.AddUser(new VoUser
{
Name = "TestUser",
Occupation = "Software Developer"
});
//Creating a blog and its post
Console.WriteLine("Creating a blog post");
IBlogServices blogRepository = new BlogServices();
var blog = new VoBlog
{
CreatedDateTime = DateTime.Now,
Overview = "This is a sample overview.",
Post = new VoPost
{
Meta = "Sample, Test",
Content = "This is a sample overview",
ShortDescription = "This is a sample short description",
Title = "Test Title"
},
UserId = userId
};
blogRepository.AddBlog(blog);
//Retrieving the user in an async mode. This is where thread switching happens
Console.WriteLine("Retrieving the created user");
var user = userRepository.GetUserAsync(userId).ConfigureAwait(false);
Console.WriteLine("Name of the created user is " + user.GetAwaiter().GetResult().Name);
//Get the user's most recent blog
Console.WriteLine("Retrieving the user most recent blog");
var recentBlog = blogRepository.GetUserRecentBlog(userId);
Console.WriteLine("Overview " + recentBlog.Overview);
Console.WriteLine("BlogPost Meta " + recentBlog.Post.Meta);
Console.WriteLine("BlogPost Short Description " + recentBlog.Post.ShortDescription);
Console.WriteLine("BlogPost Content " + recentBlog.Post.Content);
//Create a blog and try to save it. If the creation fails , update the creation failure count in the user profile.
var blog2 = new VoBlog
{
CreatedDateTime = DateTime.Now,
Post = new VoPost
{
Meta = "Sample, Test",
Content = "This is a sample overview",
ShortDescription = "This is a sample short description",
Title = "Test Title"
},
UserId = userId
};
try
{
blogRepository.AddBlog(blog2);
}
catch (Exception ex)
{
Console.WriteLine(ex.InnerException.Message);
}
Console.ReadKey();
}