public static void WireTo(IEventStore eventStore, ClientPerspective provider, ISubscriber subscriber, IMessageQueue queue)
{
var controller = new ClientModelController(eventStore, provider, queue);
controller.SubscribeTo(subscriber);
}
static void Main()
{
// this Client App uses a standard "Windows Forms" application as its host
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
#region This WinForms host uses its own in-memory message bus to manage the UI...
// It uses this in-memory bus to wire user-interface "UI" elements ("controls") to the
// logic (in controllers) that will be triggered when the user interacts with those elements.
// This allows us to send messages to the uiBus so that interested UI classes can
// subscribe to the messages they care about, and react to them
// when the bus publishes the messages to tell the UI controls what happened.
#endregion
var uiBus = new InMemoryBus("UI");
// .dat file to write Domain Events to this session
var fileToStoreEventsIn =
new FileAppendOnlyStore(new DirectoryInfo(Directory.GetCurrentDirectory()));
fileToStoreEventsIn.Initialize();
// provide serialization stuff for our file storage
var messageStore = new MessageStore(fileToStoreEventsIn);
messageStore.LoadDataContractsFromAssemblyOf(typeof(ActionDefined));
// this WinForm App's own local file-based event storage
var appEventStore = new AppEventStore(messageStore);
#region Does App care about this msg? This class controls the App's "main message loop"...
// It reads all msgs from in-memory queue (mainQueue below) and determines which messages
// the App will/will not handle at a given time (based on specific app state).
// For each queued message that it determines should be handled by
// uiBus subscribers, it passes the messages through to our in-memory uiBus,
// so bus subscribers can be called to react to the current message when the bus publishes it.
#endregion
var appController = new AppController(uiBus, appEventStore);
#region In-memory structure that all events we defined will go through...
// All domain & system messages we defined are captured
// and accumulated in this queue until some code picks up
// each message and processes it.
// (ex: AppController, declared above, will do that processing in this case).
#endregion
var mainQueue = new QueuedHandler(appController, "Main Queue");
appController.SetMainQueue(mainQueue);
appEventStore.SetDispatcher(mainQueue);
var provider = new ClientPerspective();
ClientModelController.WireTo(appEventStore, provider, uiBus, mainQueue);
// create services and bind them to the bus
// we wire all controls together in a native way.
// then we add adapters on top of that
var form = new MainForm();
var navigation = new NavigationView();
form.NavigationRegion.RegisterDock(navigation, "nav");
form.NavigationRegion.SwitchTo("nav");
LogController.Wire(form, uiBus);
#region View Controllers - Decoupling (UI) Views from their Controllers...
// The intent with this design was to enable us to
// write components or UI elements in a separated manner.
// Provide the ability to develop new functionality independently and
// it will sit in its own kind of "sandbox" so you can work on your stuff
// without impacting everyone else.
// It also sets us up for potential controller/code reuse and sharing in the future.
// The UI is broken down into kinda "SEDA standalone controllers"
// that communicate with each other via events. This event-driven
// separation allows for cleanly implementing logic like:
// "If the Inbox is selected, then only display these two menu items,
// but if a project is displayed, then display these additional menu items."
// See the Handle methods inside of MainFormController.cs for an example.
// Event-centric approaches are one of the nicest ways to build
// plug-in systems because plug-ins have services and contracts which are linked
// to behaviors (and in our case, these are events).
// Example: All CaptureThoughtController knows is that it gets handed a View
// that it controls (CaptureThoughtForm) and then it has two other injections points,
// a Bus and a MainQueue.
// See CaptureThoughtController for more comments on how this design works.
// The big idea here is that in the future, a controller can be passed an
// INTERFACE (say, ICaptureThoughtForm) INSTEAD OF a concrete Windows Forms
// implementation (CaptureThoughtForm) like it currently uses.
// So we may have a WPF form in the future that implements ICaptureThoughtForm
// and we could use that View implementation with the SAME CONTROLLER we already have.
// Very similar to how you could use the MVVM pattern with MvvmCross to
// reuse common code from the ViewModel down, but implement
// platform-specific Views on top of that common/shared code.
#endregion
#region Wiring up our Views to Controllers...
// A "Controller" or "Service" in this client-side ecosystem would usually
// define at least two parameters:
// MainQueue
// and
// "Bus"
// MainQueue is the place where it would send events that happen inside of it.
// Bus is what it subscribes to so that it will be called when specifc events happen.
// "Wire" is a static method defined on these controllers that our setup
// can call to let them know which form they control,
// the bus they can use as a source to subscribe to UI events to react to,
// and the target queue that they can use tell the rest of the world about events they generate.
#endregion
MainFormController.Wire(form, mainQueue, uiBus);
AddStuffToInboxController.Wire(new AddStuffToInboxForm(form), uiBus, mainQueue);
AddActionToProjectController.Wire(new AddActionToProjectForm(form),uiBus, mainQueue );
DefineProjectController.Wire(new DefineProjectForm(form), uiBus, mainQueue);
InboxController.Wire(form.MainRegion, mainQueue, uiBus, provider);
NavigationController.Wire(navigation, mainQueue, uiBus, provider);
ProjectController.Wire(form.MainRegion, mainQueue, uiBus, provider);
NavigateBackController.Wire(uiBus, mainQueue, form);
mainQueue.Enqueue(new AppInit());
mainQueue.Start();
Application.Run(form);
}
ClientModelController(IEventStore eventStore, ClientPerspective provider, IMessageQueue queue)
{
_eventStore = eventStore;
_provider = provider;
_queue = queue;
}