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This article mainly explains the "brief introduction of Orchard architecture", the content of the explanation is simple and clear, easy to learn and understand, now please follow the editor's ideas slowly in depth, together to study and learn "a brief introduction to Orchard architecture" bar!

It is more important for us to learn how Orchard is structured and what to do if we write a similar application ourselves. If you have time to take a look at the rest of Orchard today, this article introduces some of the architectural aspects of Orchard. Orchard has a lot of content, but we still have a superficial understanding of it, and we still need to learn it further and put it as an essay.

Architecture

Orchard foundations

Orchard is built on top of some existing frameworks and class libraries, and here are some of the main things:

ASP.NET MVC: this is Microsoft's open source MVC-based Web development framework

NHibernate:NHibernate is an ORM tool that evolved from Hibernate

Autofac: an IoC container. Orchard makes heavy use of dependency injection

Castle Dynamic Proxy: Castle is an open source project that appeared very early in .net, and Castle Dynamic Proxy is something that produces dynamic agents.

Orchard Framework

Orchard framework is at the bottom of Orchard, and you can think of it as the basic class library for Orchard.

Startup of Orchard

When the Orchard web application is started, a singleton OrchardHost (DefaultOrchardHost) at the application domain level is generated

View Code

Public class MvcApplication: HttpApplication {protected void Application_Start () {_ host = OrchardStarter.CreateHost (MvcSingletons); _ host.Initialize ();} public static class OrchardStarter {public static IOrchardHost CreateHost (Action registrations) {var container = CreateHostContainer (registrations); return container.Resolve ();} public static IContainer CreateHostContainer (Action registrations) {. Builder.RegisterType (). As (). As (). SingleInstance ();}}

DefaultOrchardHost is responsible for generating Shell, which introduces some classes: ShellContextFactory, ExtensionManager, ShellSettingsManager, CompositionStrategy, ShellBlueprint. I won't go into details now, because I haven't thought about it yet.

V public class DefaultOrchardHost: IOrchardHost, IShellSettingsManagerEventHandler, IShellDescriptorManagerEventHandler {void IOrchardHost.Initialize () {BuildCurrent ();} IEnumerable BuildCurrent () {if (_ current = = null) {lock (_ syncLock) {if (_ current = = null) {SetupExtensions (); MonitorExtensions (); _ current = CreateAndActivate (). ToArray ();}} return _ current;} IEnumerable CreateAndActivate () {var allSettings = _ shellSettingsManager.LoadSettings (); if (allSettings.Any ()) {return allSettings.Select (settings = > {var context = CreateShellContext (settings)) ActivateShell (context); return context;});}. } ShellContext CreateShellContext (ShellSettings settings) {if (settings.State.CurrentState = = TenantState.State.Uninitialized) {Logger.Debug ("Creating shell context for tenant {0} setup", settings.Name); return _ shellContextFactory.CreateSetupContext (settings);} Logger.Debug ("Creating shell context for tenant {0}", settings.Name); return _ shellContextFactory.CreateShellContext (settings);}}

Dependency injection

The standard way to generate dependencies in Orchard is to implement IDependency or its inherited interface.

There are three possible ranges of dependency, which are explained in detail and wait for later analysis:

O Request: a new instance is created for each HTTP request, and the request is processed with destruction. This kind of object implements IDependency

O Object: implement ITransientDependency. Instances are not shared.

O Shell: implement ISingletonDependency, singleton

ASP.NET MVC

Orchard is a framework built on top of ASP.NET MVC, but it also adds additional layers and concepts to add themes, multi-tenancy, and other additional features. For example, LayoutAwareViewEngine is introduced when a specific view is needed. Strictly speaking, this is not a new view engine, because it does not care about the actual drawing, but only contains some logical functions to find the correct view under the current topic, and then delegate to the actual view engine to show.

Types, Parts and Fields

Orchard can handle any content type (content types), and the content type is composed of content Parts. For example, a blog or video may have an address, reply, tag, etc. For reuse, the reply can be stored in a module as a part, so it only needs to be generated once.

Parts itself has its own properties and content fields. Content field (Fields) is also a concept of reuse, which is finer-grained than parts and can be used in multiple part.

Content Manager

All content is accessed through ContentManager objects. ContentManager has the functions of querying content storage, version content and managing release status.

Transactions

Orchard automatically generates a transaction for each HTTP request

Event bus

Commands

Many actions that can be performed in Orchard can be performed on the command line. These Command need to be implemented, and the command method is identified by the CommandName attribute.

Search and indexing

Lucene is used by default for indexing and querying

Caching

Based on caching on ASP.NET cache, the main benefit of Orchard caching API is transparency to each tenant

File systems

Orchard's file system is abstract, either a direct physical file or a blob storage deployed in the cloud

Orchard core

Orchard.Core assemblies contain modules that must be used by Orchard, such as feeds, navigation, and routable

Modules

Orchard releases some built-in modules by default, such as blog and so on. A module is just an ASP.NET MVC area file that contains a manifest.txt file.

Thank you for your reading, the above is the content of the "brief introduction of Orchard architecture", after the study of this article, I believe you have a deeper understanding of the brief introduction of Orchard architecture, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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