private void InitializeProjection()
{
var projectionData = _projectionStore.Retrieve(Guid.Empty, InventoryProjection.ProjectionType);
if (string.IsNullOrEmpty(projectionData))
{
_projection = new InventoryProjection();
}
else
{
_projection = JsonConvert.DeserializeObject <InventoryProjection>(projectionData);
}
}
// public static method we call on startup to setup our simple console environment and to wire things up
public static ConsoleEnvironment BuildEnvironment()
{
// a little bit of our simple infrastructure in here
// this infrastructure binds our simple in-memory EventStore and multiple Projections to each other
// E17 added the SynchronousEventHandler class to keep event handling simple without queues for now
// this handler is now passed to our in-memory eventStore
var eventHandlers = new SynchronousEventHandler();
var eventStore = new InMemoryStore(eventHandlers);
var blueprints = new InMemoryBlueprintLibrary();
blueprints.Register("model-t", new CarPart("wheel", 4), new CarPart("engine", 1), new CarPart("chassis", 1));
// In non-demo environments we usually want Application Services decoupled from Projections
// but we will not worry about that now for this simple example
// Application Service (Command message handler)
// get app service ready to respond to Command messages
var factoryAppSvc = new FactoryApplicationService(eventStore, blueprints);
// Projections (Event message handlers)
// directly wire projections to the Event Handlers for now
// (not using production-like queues to store the Events in for this simple example)
// projections can also be thought of as almost another kind of Application Service
// Application Services and Projections BOTH handle Messages, but
// Projections just happen to subscribe & respond to "When..." Event messages ("eventHandlers"),
// instead of "When..." Command messages
var activeFactories = new ActiveFactoriesProjection();
eventHandlers.RegisterHandler(activeFactories);
var workerRegistry = new WorkerRegistryProjection();
eventHandlers.RegisterHandler(workerRegistry);
var inventory = new InventoryProjection();
eventHandlers.RegisterHandler(inventory);
// setup Window size values for Console Window that is 60% of Max Possible Size
int winWidth = (System.Console.LargestWindowWidth * 6 / 10);
int winHeight = (System.Console.LargestWindowHeight * 6 / 10);
// hack - for now, hard code "bigger" buffer than Window sizes above
// keep horizontal buffer equal to width - to avoid horizontal scrolling
int winBuffWidth = winWidth;
int winBuffHeight = winHeight + 300;
System.Console.SetBufferSize(winBuffWidth, winBuffHeight);
// Buffer is bigger than Window so set the Window Size
System.Console.SetWindowSize(winWidth, winHeight);
// note that various tricks to center Console Window on launch
// and to change to Font size were ugly (PInvoke, etc.) so left them out for now
System.Console.Title = "Being The Worst Interactive Factory Shell";
return(new ConsoleEnvironment
{
Events = eventStore,
FactoryAppService = factoryAppSvc,
ActionHandlers = ConsoleActions.Actions,
Blueprints = blueprints,
ActiveFactories = activeFactories,
WorkerRegistry = workerRegistry,
Inventory = inventory
});
}