You may recall, in a previous post, when we did the same thing. X.ReceiveFrom("rabbitmq://localhost/Loosely_" + queueName) Public static IServiceBus CreateBus(string queueName, Action moreInitialization) ![]() We’ll put the common service bus initialization code into a class called BusInitializer: using MassTransit Add the MassTransit.Log4Net and MassTransit.RabbitMQ NuGet packages to this new class library. Now let’s add another class library named “” where we’ll keep our common MassTransit configuration code. This is the message type we will publish onto the service bus whenever a user of the web application wants to open a new support ticket. Add a new class library to the solution and name it “.” Add a new file to the class library called TicketOpened and define the following interface: namespace A contract is an interface that specifies the format of our message type. Now we need a place to keep our “contracts” for our service bus. In the “New ASP.NET Project” select the “Empty” template and check the “MVC” box under the “Add folders and core references for” heading. Give it the name “” and name the solution “Loosely.CustomerPortal.” Select the “ASP.NET Web Application” project template. Open Visual Studio and choose File… New Project. So let’s dig into the code to build this web app. When the user clicks “Open Ticket,” they will see a confirmation message containing their ticket number: When the user clicks “Open a new support ticket,” they will get a very simple form asking for their email address and a description of their problem or question: We’ll build an app that has a single menu option on it’s home page: Let’s build a rudimentary front-end application that will be a stand-in for a true customer portal style web site. This is a big one, so roll up your sleeves… The Web App You can get all the code from this blog post at. We’ll create a Windows Service to be the subscriber of these messages and it will handle the tickets, in this example, sending a confirmation email to the customer. The ticket will be published onto the service bus. In this article, we’ll build an ASP.NET MVC Customer Portal app where a customer can create a new support ticket. Preferred since it reduces the amount of operating system resources required.Now that we’ve seen some simple examples of how to use MassTransit with the Publish/Subscribe pattern on multiple machines, let’s build something that resembles a more real-world app. NOTE: The asynchronous model will create a wait event if requested, but the callback style is greatly ![]() Response handler exceptions will be thrown). ![]() Method off IEndpoint or IServiceBus) must be called to complete the request (at this point, any timeout or Once the callback is invoked (or the wait handle is signaled), the EndRequest method (which is an extension Operation (such as a BeginWebMethod/EndWebMethod pair or an AsyncController). ![]() The IAsyncResult could then be passed to whatever framework code is handling the asynchronous NET.īy calling BeginPublishRequest (or the endpoint-based BeginSendRequest), an IAsyncResult is returned The request can also be executed asynchronously using the Asychronous Programming Model of. Request (since it is blocked waiting on the response anyway). If a response handler throws an exception, that exception is rethrown on the thread that sent the If it expires, a RequestTimeoutException is thrown. The handlers, or the timeout period expires. This style of request will block the calling thread until either a response is received by one of The original request) the remaining handlers are unsubscribed and the request operation completes. Once any response is received (with the same correlation id as The final chunk shows the code to publish the request and handle any responses that relate The second chunk shows the code to simple echo back the request message as a response. So what is going on? The first chunk has the messages we are gonig to work with.
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