Solution architects are starting to use the cloud for easier handling of scale requirements and lower operational costs. In doing so, they find that existing service assets they'd like to use as building blocks for their solutions are inside the corporate firewall and out of easy reach by the cloud solution. Many internal services aren't built or hosted in a way that they can be easily exposed at the corporate network edge.
Azure Relay takes existing WCF web services and makes those services securely accessible to solutions that are outside the corporate perimeter without requiring intrusive changes to the corporate network infrastructure. Such relay services are still hosted inside their existing environment, but they delegate listening for incoming sessions and requests to the cloud-hosted relay service. Azure Relay also protects those services from unauthorized access by using Shared Access Signature (SAS) authentication.
WCF service in Windows Azure
Download Zip: https://shurll.com/2vGMMS
The tutorial assumes that you have product information in an existing on-premises system, and uses Azure Relay to reach into that system. A web service that runs in a simple console application simulates this situation. It contains an in-memory set of products. You can run this console application on your own computer and deploy the web role into Azure. By doing so, you'll see how the web role running in the Azure datacenter calls into your computer. This call happens even though your computer will almost certainly be behind at least one firewall and a network address translation (NAT) layer.
The first step is to create a namespace, and to obtain a Shared Access Signature (SAS) key. A namespace provides an application boundary for each application exposed through the relay service. An SAS key is automatically generated by the system when a service namespace is created. The combination of service namespace and SAS key provides the credentials for Azure to authenticate access to an application.
Now open the HomeController.cs file in the Visual Studio editor and replace the namespace definition with the following code. Be sure to replace yourServiceNamespace with the name of your service namespace, and yourKey with your SAS key. This code lets the client to call the on-premises service, returning the result of the call.
To test the application locally, in Visual Studio select F5. The on-premises server, ProductsServer, should start first, then the ProductsPortal application should start in a browser window. This time, you see that the product inventory lists data retrieved from the product service on-premises system.
The product inventory lists data retrieved from the product service on-premises system, and displays that data in the web app. Check the URL to make sure that ProductsPortal is running in the cloud, as an Azure web app.
Just to clarify I am working for the first time with azure. I created a Restful WCF Service a few months ago with SQL Server connection. I deployed the WCF on IIS with the database on SQL Server Express 2012. The service works with no problems.
Usually we use Cloud Services on Azure to host WCF services. While Cloud Services hosting works as expected, the requirement we got was to find an option to host wcf service using one of the features in Azure AppService itself.
Step 6: After successful deployment, the published WCF Service will be displayed on the App Service section on Azure portal.Step 7: Click on Published WCF Service to find more details and URL of service.
After successful deployment of the cloud service, you can browse the service and check it using the URL displayed in the SITE URL section. Now the service is ready to be called from inside your application.
US government entities are eligible to purchase Azure Government services from a licensing solution provider with no upfront financial commitment, or directly through a pay-as-you-go online subscription.
The relay counts each message sent to the relay, and each message sent by the relay, as billable. A billable message is a data frame of at most 64 KB. If a message exceeds 64 KB, such as an HTTP reply that returns an image, each further 64 KB counts as an additional billable message. For a normal relayed service that implements a request/response scheme, the request first travels to the relay, then to the service, and the reply traverses the same path. That amounts to at least four billable messages. For a multicast service that has 4 listeners, the message sent to the relay counts as 1 message, and the 4 messages sent to the listeners also each count as a message, resulting in a total of 5 messages.
Relay hours are billed for the cumulative amount of time during which each Service Bus Relay is "open". A relay is implicitly instantiated and opened at a given Service Bus address (service namespace URL) when a relay-enabled WCF service, or "relay listener," first connects to that address. It's closed only when the last listener disconnects from its address. Therefore, for billing purposes a relay is considered "open" from the time the first relay listener connects, to the time the last relay listener disconnects from the Service Bus address of that relay.
Yes, they do. There are no connection charges for sending events using HTTP, regardless of the number of sending systems or devices. Receiving events with HTTP using a timeout greater than zero, sometimes called "long polling," generate brokered connection charges. AMQP connections generate brokered connection charges regardless of whether the connections are being used to send or receive. Note that 100 brokered connections are allowed at no charge in a basic namespace (this is also the maximum number of brokered connections allowed for the Azure subscription). The first 1,000 brokered connections across any and all standard namespaces in an Azure subscription are included at no extra charge (beyond the base charge). Since these allowances are enough to cover many service-to-service messaging scenarios, brokered connection charges usually only become relevant if you plan to use AMQP or HTTP long-polling with a large number of clients, for example, to achieve more efficient event streaming, or enable bi-directional communication with thousands or millions of devices or app instances.
When you create your first hybrid connection listener you will be charged at a per listener unit rate. The same rate applies to each individual listener that you decide to create. 5 GB of free data transfer per month is included with the service. You can use the 5 GB of free data transfer across all your listener units. You will be charged for data transfer overage if your aggregate data transfer across all listener units is more than 5 GB.
The Windows Azure platform provides an environment for developing scalable and highly available applications. Today we will look at a scenario where a multi-location company has a set of Web Services that are consumed by client applications in their various networks. This architecture is a good candidate for Azure deployment wherein the WCF service is hosted in the cloud and it communicates to SQL Azure for data.
The Web role handles external HTTP and HTTPS communications. This provides services like IIS 7.5 for hosting environment. This article also explains the capability of Visual Studio 2010 for publishing an application over cloud using the Publish wizard. Pre-requisite for publishing is a Azure subscription for the cloud deployment and service creation.
The publish feature provides a flexible and handy mechanism of deploying the application over the cloud. Before using this facility, you must have a Windows Azure Subscription, which you can get by visiting www.azure.com. Your credit card information will be required.
Since we need to created a Hosted service for the application to deploy, you will get the following window using which you can create the hosted service and select the Region for deployment, which allows to select Data Center for the application.
WCF is a component of the .NET Framework that provides a programming model for building service-oriented multi-platform applications that communicate across the web. For more information about the technology, visit the What Is Windows Communication Foundation page in the Microsoft documentation.
WCF services in Kentico applications are defined as service endpoints. By default, the service endpoints point to HTTP bindings. To use the services with SSL enabled, you must point the service endpoints to secure HTTPS bindings. Service endpoints and bindings are defined in local, application-specific, web.config files. You configure each service separately.
Otherwise you may encounter errors if the first request that starts the application is destined for the WCF service. The standard initialization does not occur, because WCF requests are not processed by the ASP.NET HTTP runtime. For more information, see the WCF Services and ASP.NET article.
You can initialize the Kentico application by calling the CMS.DataEngine.CMSApplication.Init method, for example within the constructor of your WCF service class. See Using the Kentico API externally to learn more.
You can see that in the highlighted section above, we create an instance of the service proxy on the client and call the GetData method on the service to make it perform the addition operation on the numbers provided.
We have now created a WCF client application which calls a WCF service hosted in Azure cloud/emulator. If you are having problems following along, you can download the client sample code from here and the Demo itself here.
With those changes made, the Bean Trader service is now completely migrated to .NET 6! I can launch the app and connect to it with the existing client. And the WSDL is available at localhost:8080/metadata. To see all of the changes discussed in this post in their entirety, you can look at this pull request which updates the Bean Trader sample so that, finally, the NetCore folder of the sample contains only .NET Core and .NET 6-targeted projects! 2ff7e9595c
Comments